Duduqlanish - Stuttering

Duduqlanish
Boshqa ismlarDarmonsizlik, alaliya syllabaris, alalia literalis, anarthria literalis, dysphemia.[1]
Talaffuz
MutaxassisligiNutq-til patologiyasi
AlomatlarMajburiy bo'lmagan ovozni takrorlash va nutqni buzish yoki blokirovka qilish
MurakkabliklarUyat, bezorilik, ijtimoiy tashvish, omma oldida so'zlashdan qo'rqish
Odatiy boshlanish2-5 yil
MuddatiUzoq muddat
SabablariNoma'lum
Differentsial diagnostikadisfoniya[1]
DavolashNutq terapiyasi
Dori-darmonDopamin antagonistlari
PrognozOdatda kech bolalik davrida hal qilinadi; 20% holatlar voyaga etmoqda
ChastotaniTaxminan 1%

Duduqlanish, shuningdek, nomi bilan tanilgan dadillik va disfemiya, a nutqning buzilishi unda oqim nutq tovushlar, heceler, so'zlar yoki iboralarni beixtiyor takrorlash va uzaytirish, shuningdek, duduqlagan kishi tovushlarni chiqara olmaydigan beixtiyor jim pauzalar yoki bloklar bilan buziladi.[2] Atama duduqlanish odatda beixtiyor ovozni takrorlash bilan bog'liq, ammo u g'ayritabiiy ikkilanishni yoki nutqdan oldin to'xtab turishni o'z ichiga oladi, deb duduqlanadigan odamlar aytadilar bloklarva, odatda, ba'zi tovushlarni cho'zish unlilar yoki yarim iplar. Uotkins va boshqalarning fikriga ko'ra, duduqlanish - bu "ravon nutqni ishlab chiqarish uchun zarur bo'lgan motorlar ketma-ketligini tanlash, boshlash va bajarish" buzilishi.[3] Duduqlanadigan ko'p odamlar uchun takrorlash asosiy muammo. "Duduqlanish" atamasi zo'rg'a sezilmaydigan to'siqlardan tortib, asosan, kosmetikadan og'irgacha bo'lgan turli xil zo'ravonliklarni qamrab oladi. alomatlar samarali oldini olish og'zaki muloqot. Dunyo bo'ylab deyarli 70 million odam duduqlanadi,[4] dunyo aholisining taxminan 1%.[3] Duduqlanuvchilarning to'rtdan to'rt qismi erkaklar.[4] Hayot davomida duduqlanish muammosidan aziyat chekadigan odamlarning alomatlari 70-80 yoshga kirganda sezilarli darajada kuchayishi odatiy holdir.[5]

Duduqlanishning odamning faoliyati va hissiy holatiga ta'siri kuchli bo'lishi mumkin. Bunga majbur bo'lish qo'rquvi kirishi mumkin bayon qilmoq o'ziga xos unli yoki undosh tovushlar, ijtimoiy vaziyatlarda duduqlanib qolish qo'rquvi, o'zini o'zi ajratib qo'yish, xavotir, stress, uyat, o'zini past baholash, bezorilikning mumkin bo'lgan maqsadi (ayniqsa bolalarda), so'z almashtirish va so'zlarni almashtirishga to'g'ri keladi. gapda duduqlanishni yashirish yoki nutq paytida "nazoratni yo'qotish" hissi. Duduqlanish ba'zan xalq orasida tashvish alomati sifatida qaraladi, ammo bu yo'nalishda to'g'ridan-to'g'ri bog'liqlik yo'q.[6]

Duduqlanish odatda nutq tovushlarini jismoniy ishlab chiqarish yoki fikrlarni so'zlarga kiritish bilan bog'liq muammo emas. O'tkir asabiylashish va stresslar duduqlanishni keltirib chiqaradi deb o'ylamaydilar, ammo ular nutqida nuqsoni bo'lgan odamlarda duduqlanishni keltirib chiqarishi mumkin va nogironlik bilan yashashga olib kelishi mumkin tashvish va yuqori allostatik stress yuki (surunkali asabiylashish va stress) duduqlanadigan har qanday odamda duduqlanishni boshlash uchun zarur bo'lgan o'tkir stress miqdorini kamaytiradigan va muammoni ijobiy fikr tizim; ushbu holat uchun "duduqlangan nutq sindromi" nomi taklif qilingan.[7][8] Ammo na o'tkir, na surunkali stress, o'zi duduqlanishga moyillikni keltirib chiqarmaydi.

Buzilish ham o'zgaruvchanbu shuni anglatadiki, ba'zi holatlarda, masalan, telefonda yoki katta guruhda gaplashish, duduqlanish odamning duduqlanishiga o'z-o'zini anglashi yoki qilmasligiga qarab, duduqlanish yanada og'irroq yoki kamroq bo'lishi mumkin. Duduqlanadigan odamlar ko'pincha ularning duduqlanishlari o'zgarib turishini va "yaxshi" kunlar, "yomon" va "kekelemesiz" kunlar bo'lishini payqashadi. Ularning duduqlanishlari o'zgarib turadigan vaqtlar tasodifiy bo'lishi mumkin.[9] To'liq bo'lsa-da etiologiya, yoki duduqlanish sababi, ikkalasi ham noma'lum genetika va neyrofiziologiya hissa qo'shadi deb o'ylashadi. Ko'p muolajalar mavjud va nutq terapiyasi kamayishiga yordam beradigan texnikalar mavjud nutqning ravshanligi ba'zi bir odamlarda duduqlanmagan qulog'i muammoni aniqlay olmaydigan darajaga qadar duduqlanadi; ammo, hozirgi paytda buzilishning davosi aslida yo'q. Odamning duduqlanishining og'irligi, norozilikni kamaytirish uchun zarur bo'lgan nutq terapiyasining miqdoriga to'g'ri keladi. Kuchli duduqlanish uchun norozilikni kamaytirish uchun uzoq muddatli terapiya va mashaqqatli mehnat talab etiladi.[10]

Xususiyatlari

Umumiy xatti-harakatlar

Oddiy duduqlanish xatti-harakatlari nutqning buzilishining kuzatiladigan belgilaridir, masalan: tovushlarni, hecalarni, so'zlarni yoki iboralarni takrorlash, jim bloklar va tovushlarni uzaytirish. Ular barcha ma'ruzachilarda uchraydigan odatdagi noxushliklardan farq qiladi, chunki duduqlangan noxushliklar uzoq davom etishi, tez-tez uchrab turishi va ko'proq kuch va zo'riqish bilan hosil bo'lishi mumkin.[11] Kekillab ketadigan noroziliklar sifat jihatidan ham farq qiladi: odatdagi noroziliklar takrorlanadigan harakatlar, qat'iy pozitsiyalar yoki ortiqcha xatti-harakatlarga moyil bo'ladi. Ushbu uchta toifaning har biri duduqlanish va kelishmovchiliklar kichik guruhlaridan iborat.[12]

  • Takroriy harakatlar[12]
    • Hecle takrorlash - bitta heceli so'z takrorlanadi (masalan: on-on-stulda) yoki hali ham "un-un-ostida ..." va "o—" kabi to'liq hecada bo'lgan so'zning bir qismi. o — ochiq ".
    • To'liq bo'lmagan hece takrorlanishi - to'liq bo'lmagan hece takrorlanadi, masalan, unli bo'lmagan undosh, masalan, "c - c - c - sovuq".
    • Ko'p heceli takrorlash - butun so'z kabi bir nechta hece yoki bir nechta so'z takrorlanadi, masalan, "bilaman - bilaman - juda ko'p ma'lumotni bilaman".
  • Ruxsat etilgan holatlar[12]
    • Eshitiladigan havo oqimi bilan - "mmmmmmmmmom" kabi tovushning uzayishi sodir bo'ladi.
    • Ovozli havo oqimisiz - masalan, nutq bloki yoki tinimsiz pauza kabi, harakatlarga qaramay hech narsa aytilmaydi.
  • Ortiqcha xatti-harakatlar[12]
    • Og'zaki - bu keraksiz kabi kesishni o'z ichiga oladi uh yoki xm orqaga qaytish va "Men - mening qiz do'stim ..." kabi dastlabki gaplarni tuzatish kabi qayta ko'rib chiqishlar, qaerda Men so'ziga tuzatilgan mening.
    • Og'zaki bo'lmagan - bu ko'rinadigan yoki eshitiladigan nutq xatti-harakatlari, masalan, labni urish, tomoqni ochish, boshni silkitish va boshqalar, odatda blok yoki kekelemeyi sindirish yoki chetlab o'tish harakatlarini anglatadi.

O'zgaruvchanlik

Duduqlanishning og'irligi ko'pincha qattiq duduqlanadigan odamlar uchun ham doimiy emas. Duduqlanuvchilar odatda boshqa ma'ruzachi bilan bir ovozdan gaplashayotganda, boshqalarning nutqini nusxa ko'chirganda, pichirlashda, qo'shiq aytganda yoki aktyorlik paytida yoki uy hayvonlari, yosh bolalar yoki o'zlari bilan suhbatlashganda ravonlikning keskin oshganligi haqida xabar berishadi.[13] Boshqa holatlar, masalan, omma oldida so'zlash va telefonda gaplashish juda qo'rqadi va keksa odamlarning ko'payishi xabar qilinadi.[14]

Tuyg'ular va munosabat

Duduqlanish duduqlanadigan kishiga sezilarli salbiy va ta'sirchan ta'sir ko'rsatishi mumkin. So'zlari bilan tavsiflangan o'xshashlik ga aysberg, yuqoridagi kekelemenin darhol ko'rinadigan va eshitiladigan alomatlari bilan suv liniyasi va salbiy kabi alomatlarning yanada kengroq to'plami hissiyotlar sirt ostida yashiringan.[15] Tuyg'ular xijolat, uyat, umidsizlik, qo'rquv, g'azab va ayb duduqlanadigan odamlarda tez-tez uchraydi,[16] va aslida keskinlik va harakatni kuchaytirishi mumkin, bu esa kekirishni kuchayishiga olib keladi.[17] Vaqt o'tishi bilan, qiyin nutq tajribalariga ta'sir qilish, o'z-o'zini anglash va o'zini o'zi tasavvur qilish uchun kristallanishi mumkin. Ko'pchilik kekkayganlarni o'zlarining noilojligi sababli ularni aqlli emas deb bilishadi; ammo, bir guruh bo'lib, duduqlanadigan shaxslar o'rtacha aqldan yuqori bo'lishga moyil.[18] Duduqlanadigan odamlar boshqalarni asabiy yoki ahmoq deb o'ylashadi, deb ishonib, o'zlarining munosabatlarini boshqalarga qaratishi mumkin. Bunday salbiy his-tuyg'ular va munosabat davolash dasturining asosiy yo'nalishi bo'lishi kerak.[17]

Duduqlanadigan ko'plab odamlar balandlik haqida xabar berishadi hissiy xarajatlar, shu jumladan ish joylari yoki aktsiyalar qabul qilinmadi, shuningdek munosabatlar singan yoki ta'qib qilinmagan.[19]

Ravon va notinchlik

Lingvistik vazifalar chaqirishi mumkin nutqning ravshanligi. Duduqlanadigan odamlar turli xil noroziliklarga duch kelishlari mumkin.[20] Noqulaylikni keltirib chiqaradigan vazifalar odatda lingvistik rejalashtirishni o'z ichiga olgan boshqariladigan tilda ishlashni talab qiladi. Duduqlanishda, ko'p odamlar jiddiy rejalashtirishsiz avtomatik ishlov berishga imkon beradigan vazifalar haqida gap ketganda, ular noroziliklarini namoyish qilmaydilar. Masalan, "Tug'ilgan kuningiz bilan" yoki boshqa nisbatan tez-tez takrorlanadigan lingvistik nutqlarni kuylash duduqlanadigan odamlarda suyuq bo'lishi mumkin. Bu kabi vazifalar semantik, sintaktik va prosodik rejalashtirishni kamaytiradi, o'z-o'zidan, "boshqariladigan" nutq yoki ovoz chiqarib o'qish fikrlarni lingvistik materialga aylantirishni talab qiladi. sintaksis va prosody. Ba'zi tadqiqotchilar gipoteza qiladiki, boshqariladigan tilda faollashtirilgan sxema doimiy ravishda duduqlanadigan odamlarda to'g'ri ishlamaydi, ammo duduqlanmaydigan odamlar faqat ba'zida yoqimsiz nutq va g'ayritabiiy sxemalarni namoyish etadilar.[20]

Sabablari

Rivojlanishda duduqlanishning yagona, maxsus sababi ma'lum emas. Turli xil gipotezalar va nazariyalar kekelemeye sabab bo'lgan bir qancha omillarni taklif qiladi.[21] Bular orasida kekemelik genetik asosga ega ekanligi haqida kuchli dalillar mavjud.[22] Duduqlanadigan birinchi darajali qarindoshlari bo'lgan bolalar duduqlanishdan uch baravar yuqori.[23] Biroq, egizak va farzand asrab olish bo'yicha tadqiqotlar shuni ko'rsatadiki, genetik omillar duduqlanish paydo bo'lishi uchun atrof-muhit omillari bilan o'zaro ta'sir qiladi,[24] va ko'plab duduqlanganlar oilada bu kasallikning tarixi yo'q.[25]Duduqlanish ko'pincha bir vaqtning o'zida nutq, til, o'rganish yoki harakatlanishda qiyinchiliklarga duch keladigan bolalarda uchraydi degan dalillar mavjud.[26] Duduqlanishda genetik tadqiqotlarning kashshofi bo'lgan Robert Vestning ta'kidlashicha, duduqlanishning mavjudligi, badiiy nutq inson evolyutsiyasidagi so'nggi katta yutuq ekanligi bilan bog'liq.[27]

Boshqa nuqtai nazar shundan iboratki, duduqlanish yoki duduqlanish - bu murakkab tik. Ushbu qarash quyidagi sabablarga ko'ra amalga oshiriladi. Bu har doim tovushlarni yoki so'zlarni takrorlashdan kelib chiqadi. Kichkina bolalar takrorlanishni yaxshi ko'radilar va o'zlarini qanchalik keskinroq his qilsalar, shiddatliligi uchun bu do'kon ularga shunchalik yoqadi - tushunarli va odatiy reaktsiya. Ular barcha turdagi xatti-harakatlarni takrorlashga qodir. Qanchalik keskinlik sezilsa, o'zgarishni shunchalik yoqtirmaydi. O'zgarishlar qancha ko'p bo'lsa, shuncha ko'p takrorlash mumkin. Shunday qilib, 3 yoshli bola yangi ukasi yoki singlisi borligini topgach, tovushlarni takrorlashni boshlashi mumkin. Takrorlashlar shartli va avtomatik bo'lib ketishi mumkin va takrorlanishga qarshi kurash natijasida uning nutqi cho'zilib ketadi va bloklanadi. 3-4 o'g'il bolalar nisbati bo'yicha qizlarga qaraganda ko'proq o'g'il bolalar: 1 qiz. Buning sababi erkak Gipotalamus-gipofiz-buyrak usti (HPA) o'qi faolroq. Erkaklar ko'proq ishlab chiqarganligi sababli kortizol xuddi shu provokatsiya ostidagi ayollarga qaraganda, ular tarang yoki xavotirli bo'lib, takrorlanib turishi mumkin.[28]

2010 yilgi maqolada uchta gen topilgan Dennis Drayna va duduqlanish bilan bog'liq bo'lgan jamoa: GNPTAB, GNPTG va NAGPA. Tadqiqotchilar, ushbu uch gendagi o'zgarishlar oilaviy tarixda duduqlanish holatiga ega bo'lganlarning 9 foizida bo'lganligini taxmin qilishdi.[29][30]

Duduqlanadigan ba'zi odamlar uchun tug'ma omillar ta'sir qilishi mumkin. Bunga tug'ilish paytida yoki uning atrofidagi jismoniy shikastlanish, o'qishdagi nogironlik va boshqalar kiradi miya yarim falaj. Boshqalarda, birodarning tug'ilishi, harakatlanishi yoki lingvistik qobiliyatning to'satdan o'sishi kabi stressli vaziyatlar tufayli qo'shimcha ta'sir ko'rsatishi mumkin.[22][24]

Duduqlanuvchilarning miyasidagi strukturaviy va funktsional farqlar uchun aniq empirik dalillar mavjud. Tadqiqotlar bunday farqlar sabab emas, balki duduqlanishning oqibatlari bo'lishi mumkinligi bilan biroz murakkablashadi, ammo katta yoshdagi bolalar bo'yicha o'tkazilgan so'nggi tadqiqotlar tarkibiy farqlarni tasdiqlaydi va shu bilan hech bo'lmaganda ba'zi farqlar duduqlanish natijasi emas degan dalilga kuch beradi.[31][32]

Duduqlanishning sababi sifatida eshitish vositalarini qayta ishlash defitsiti ham taklif qilingan. Duduqlanish kar va eshitish qobiliyati past odamlarda kam uchraydi,[33] va kabi eshitish teskari aloqasi o'zgartirilganda duduqlanish kamayishi mumkin maskalash, kechiktirilgan auditorlik aloqasi (DAF) yoki chastotani o'zgartirgan teskari aloqa.[21][34] Duduqlanadigan odamlarda eshitish qobig'ining funktsional tashkiloti har xil bo'lishi mumkinligi haqida ba'zi dalillar mavjud.[21]

Kekillaydigan odamlar va lom-mim demaydigan odamlar o'rtasida lingvistik ishlov berishdagi farqlarning dalillari mavjud.[35] Voyaga etgan keksa odamlarning miyani skanerlashi nutq bilan bog'liq bo'lgan chap yarim sharda emas, balki hissiyotlar bilan bog'liq bo'lgan o'ng yarim sharning faollashishini aniqladi. Bundan tashqari, chap eshitish korteksida faollashuvning pasayishi kuzatilgan.[21][24]

The imkoniyatlar va talablar buzilishning heterojenligini hisobga olish uchun model taklif qilingan. Ushbu yondashuvda nutqning ishlashi qarab o'zgaradi imkoniyatlar shaxs ravon nutq so'zlashi uchun ega bo'lgan va talablar nutq holati bilan odamga yuklanadi. Ravon nutq qobiliyatiga buzilishga moyillik, eshitish qobiliyati yoki vosita nutqining etishmovchiligi ta'sir qilishi mumkin. kognitiv yoki ta'sirchan masalalar. Talablar ishonchsizlik yoki kabi ichki omillar bilan ko'payishi mumkin o'z-o'zini hurmat yoki etarli bo'lmagan til qobiliyatlari yoki tashqi omillar tengdoshlarning bosimi, vaqt bosimi, stressli nutqiy vaziyatlar, mukammal nutqni talab qilish va boshqalar. Duduqlanishda, odamning nutqi va til tizimiga qo'yiladigan talablar ushbu bosimlarni engish qobiliyatidan oshib ketganda, buzilishning og'irligi kuchayishi mumkin.[36] Biroq, qobiliyat yoki qobiliyatsizlikning aniq tabiati aniqlanmagan.

Mexanizm

Fiziologiya

Neyroimaging tadqiqotlari hali o'ziga xos asabiy bog'liqliklarni topmagan bo'lsa-da, keksa odamlarning miyasi kekirmaydigan kattalar miyasidan farq qiladigan ko'plab dalillar mavjud. Duduqlanish bilan bog'liq joylarni aniqlash uchun bir nechta neyroimaging tadqiqotlari paydo bo'ldi. Umuman olganda, duduqlanish paytida miyadagi harakatlar jimgina dam olish yoki duduqlanadigan va gapirmaydigan odamlar o'rtasidagi ravon nutqqa nisbatan keskin o'zgaradi. Duduqlanadigan odamlar motorik dasturlarni artikulyatsiya yoki lingvistik ishlov berish boshlanishidan oldin faollashtiradigan dalillar mavjud. Miyani ko'rish bo'yicha tadqiqotlar asosan kattalarga qaratilgan. Ammo kattalarda uchraydigan nevrologik anomaliyalar bolalikdagi duduqlanish ushbu anormalliklarni keltirib chiqaradimi yoki anormalliklar duduqlanishni keltirib chiqaradimi-yo'qligini aniqlamaydi.[31]

Foydalanish bo'yicha tadqiqotlar pozitron emissiya tomografiyasi (BUTR) notanish nutqni chaqiradigan vazifalarni bajarish paytida, duduqlanadigan odamlarni topdilar gipoaktivlik kabi tilni qayta ishlash bilan bog'liq kortikal sohalarda Brokaning maydoni, lekin vosita funktsiyasi bilan bog'liq sohalarda giperaktivlik.[20] Duduqlanish davrini baholagan bunday tadqiqotlardan biri shuni ko'rsatdiki, miya va serebellumda haddan tashqari faollashuv va chap yarim sharning eshitish joylari va frontal vaqt mintaqalarining nisbiy o'chirilishi mavjud.[37]

Funktsional magnit-rezonans tomografiya (fMRI) vaqti-vaqti bilan murakkab nutq tarkibiga kiritilgan vaqtni taxmin qilish vazifalari bilan bog'liq bo'lgan o'ng frontal operulyatsiyada (RFO) g'ayritabiiy aktivatsiyani aniqladi.[20]

Tadqiqotchilar vaqtinchalik kortikal faollashuvlardan foydalanish orqali o'rganib chiqdilar magnetoensefalografiya (MEG). Bitta so'zni tanib olish vazifalarida duduqlanmagan odamlar birinchi navbatda kortikal aktivatsiyani ko'rsatdilar oksipital joylar, so'ngra Broka hududi kabi chap pastki-frontal mintaqalarda va nihoyat, motor va prekomotor kortekslarda. Duduqlanuvchilar, avvalo, oksipital sohada kortikal faollashuvni boshladilar, ammo chap va pastki frontal mintaqalar faqat motor va prekotorotor kortekslari faollashtirilgandan keyingina faollashdi.[20][37]

Nutqni ishlab chiqarish paytida duduqlanadigan odamlar oldingi insula, serebellum va ikki tomonlama o'rta miyada haddan tashqari faollikni ko'rsatadilar. Ular ikki tomonlama ventral premotorda, Rolandik operatsion va sensorimotor korteksda va chap yarim sharda Heschl girusida harakatsizlikni namoyon etadi.[31] Bundan tashqari, nutqni ishlab chiqarish kortikal vosita va oldingi motor sohalarida harakatsizlikni keltirib chiqaradi.[31]

Anormal lateralizatsiya

Neyroimaging usullaridan ko'plab dalillar, kekirdaklaydigan odamlarning o'ng yarim sharlari chap yarim sharning nutq ishlab chiqarishiga xalaqit beradi degan nazariyani qo'llab-quvvatladi.

Kekillaydigan kattalar perisilviy frontotemporal hududlarida girusda anatomik farqlarga ega. Miyaning o'ng yarim sharida, shu jumladan yuqori vaqtinchalik girus mintaqasida katta miqdordagi oq moddalar mavjud. Bu vokselga asoslangan morfometriya (VBM) yordamida aniqlandi. Boshqa tomondan, keksa yoshdagi keksa odamlarda vaqtinchalik va frontal joylarni bog'laydigan chap pastki kamar fasikulasida kamroq miqdordagi oq moddalar mavjud.[38]

Natijalar shuni ko'rsatdiki, miyaning chap yarim sharidagi qoqintiradigan erkaklar va ayollarning nutq motori va rejalashtirish mintaqalari o'rtasida, ya'ni duduqlanmaydigan nazorat guruhiga nisbatan kamroq muvofiqlashtirish mavjud.[39] Gapirish motori va rejalashtirish mintaqalarining anatomik aloqasi keksa odamlarda, ayniqsa ayollarda unchalik kuchli emas. Duduqlanadigan erkaklar ko'proq motorli aloqaga ega ko'rinadi. Boshqa tomondan, duduqlangan ayollar to'g'ri motorli hududlar bilan kamroq aloqaga ega.[39]

Duduqlanmaydigan odatdagi nutqda PET-skanerlash shuni ko'rsatadiki, ikkala yarim shar ham faol, ammo chap yarim shar ham faolroq bo'lishi mumkin. Aksincha, duduqlanadigan odamlar o'ng yarim sharda ko'proq faollik ko'rsatib, bu chap yarim sharning nutq ishlab chiqarishiga xalaqit berishi mumkin degan fikrni bildirmoqdalar. Oldingi miya mintaqalarini skanerlashning yana bir taqqoslashi duduqlanishda nomutanosib faol, post-rolandik mintaqalar esa nisbatan faol emas.[40]

Ikki tomonlama o'sish va noodatiy o'ng-chap assimetriya topilgan planum temporale duduqlanadigan va gapirmaydigan odamlarni taqqoslaganda.[37] Ushbu tadqiqotlar, shuningdek, anatomik farqlar mavjudligini aniqladilar Rolandik operkulum va arcuate fasciculus.[3]

Boshqa anatomik farqlar

Korpus kallosum chap va o'ng miya yarim sharlari o'rtasida ma'lumot uzatadi. Korpus kallosum, rostrum va tanasining oldingi o'rta qismlari odatdagidek ravon bo'lgan kattalarga nisbatan duduqlanadigan kattalarda kattaroqdir. Ushbu farq miya tashkilotining g'ayrioddiy kattalardagi g'ayrioddiy funktsiyalari bilan bog'liq bo'lishi mumkin va duduqlangan kattalar tilga oid vazifalarni qanday bajarganliklari natijasi bo'lishi mumkin. Bundan tashqari, avvalgi tadqiqotlar shuni ko'rsatdiki, duduqlanadigan kattalar miya yarim sharlarini ko'rsatib, unda miyaning nisbati va kulrang va oq materiya to'qimalarining tarqalishini o'z ichiga oladi.[41]

Dopamin

Yaqinda o'tkazilgan tadqiqotlar shuni ko'rsatdiki, duduqlanadigan kattalarda nörotransmitter darajasi ko'tarilgan dopamin va shu bilan topdik dopamin antagonistlari duduqlanishni kamaytiradigan (quyida kekelemeye qarshi dori-darmonlarni ko'ring).[37] O'rta miyaning haddan tashqari faolligi qizil yadro va subtalamik yadrogacha cho'zilgan substratia nigra darajasida aniqlandi, bularning barchasi dopamin ishlab chiqarishga yordam beradi.[31] Shu bilan birga, dopaminning ko'payishi qo'zg'atuvchi funktsiyani kuchaytirmaydi, chunki dopamin ta'siri qaysi dopamin retseptorlari (D1 - D5) bilan stimulyatsiya qilinganiga qarab ham qo'zg'atuvchi yoki inhibitiv bo'lishi mumkin.

Tashxis

Duduqlangan nutqning ba'zi xususiyatlarini tinglovchilar aniqlash oson emas. Natijada, duduqlanishni tashxislash sertifikatlangan defektoped (SLP) malakasini talab qiladi. Duduqlanish tashxisida shaxsni to'g'ridan-to'g'ri kuzatishda ham, shaxsning kelib chiqishi haqidagi ma'lumotlarda ham, voqealar tarixi orqali foydalaniladi.[42] Ikkala manbadan olingan ma'lumotlarda yosh, turli vaqtlar va boshqa to'siqlar kabi narsalar ko'rib chiqilishi kerak.[43] SLP, shaxs haqida batafsil intervyu yoki ota-onalar bilan suhbat orqali (agar mijoz bola bo'lsa) voqea tarixini to'plashi mumkin. Shuningdek, ular ota-onalar bilan bolalarning o'zaro munosabatlarini kuzatishlari va bolaning ota-onalarining nutq uslublarini kuzatishlari mumkin.[44] SLPni baholashning umumiy maqsadi: (1) nutqning noto'g'riligini aniqlash va (2) uning og'irligi keyingi davolanish uchun tashvish tug'diradimi yoki yo'qligini baholash.

Mijozni bevosita kuzatish paytida SLP shaxsning nutq xatti-harakatlarining turli jihatlarini kuzatadi. Xususan, terapevt mavjud bo'lgan noaniqlik turlari, shu jumladan omillarni (Disfluency Type Index (DTI) kabi testdan foydalangan holda), ularning chastotasi va davomiyligini (takrorlanish soni, bo'g'inlarning foizlari (% SS)) va gapirish tezligi (daqiqada hecalar (SPM), daqiqada so'zlar (WPM)). Shuningdek, ular nutqda tabiiylik va ravonlikni sinab ko'rishlari mumkin (tabiiylik darajasi shkalasi (NAT), bolalikdan duduqlanish testi (TOCS)) va nutq paytida jismoniy hamrohlar (Rileyning kekkaygan jiddiylik asboblari to'rtinchi nashri (SSI-4)).[44] Shuningdek, ular duduqlanishning og'irligini va uning borishi uchun bashorat qilishni baholash uchun testdan foydalanishlari mumkin. Bunday testlardan biri kelajakdagi xafagarchilikning og'irligi va uning surunkali holatiga oid prognozini aniqlash uchun bolaning ish tarixi, so'zma-so'z takrorlanishlari va uzaytirilishi va duduqlanish chastotasini tahlil qiladigan yosh bolalar uchun duduqlanishni bashorat qilish vositasini (SPI) o'z ichiga oladi.[45]

Duduqlanish - bu ko'p qirrali, murakkab kasallik bo'lib, u inson hayotiga turli xil ta'sir ko'rsatishi mumkin. Bolalar va kattalar ularning buzilishi bilan bog'liq bo'lgan stressni yuzaga keltirishi mumkin bo'lgan ijtimoiy, psixologik yoki emotsional belgilarning tekshirilishi va baholanishi. Ushbu turdagi ba'zi bir umumiy baholash omillari quyidagilarni o'z ichiga oladi: xavotir (Endler ko'p o'lchovli tashvish o'lchovlari (EMAS)), munosabat (aloqa qilishning shaxsiy hisoboti (PRCA)), o'zini anglash (nutq holatlariga reaktsiyalarning o'z-o'zini baholash (SSRSS)), hayot sifati (ma'ruzachining duduqlanish tajribasini umumiy baholash (OASES)), xulq-atvori (kattalarning o'z-o'zini hisoboti (OASR)) va aqliy salomatligi (xalqaro diagnostik intervyu (CIDI)).[46]

Keyinchalik, SLP mijozning amaliy tadqiqidan olingan ma'lumotni baholash natijalari bo'yicha olingan ma'lumotlar bilan birlashtirib, ravonlik buzilishi borligi to'g'risida yakuniy qaror qabul qilish va mijoz uchun eng yaxshi davolanish usulini aniqlashga harakat qiladi.

Duduqlanish DSM-5 diagnostika kodlari bo'yicha ham aniqlanishi mumkin[47] etarli malakaga ega bo'lgan klinik psixologlar tomonidan. DSM-5-ning eng so'nggi versiyasida ushbu nutq buzilishi, rivojlanishda duduqlanish uchun "Bolalik boshlanishida ravonlik buzilishi (duduqlanish)" va "Kattalar boshlagan ravonlik buzilishi" deb ta'riflangan. Biroq, DSM-IV-dan ushbu o'zgarishning o'ziga xos asoslari APA-ning nashr etilgan adabiyotlarida noto'g'ri hujjatlashtirilgan va ba'zilar tomonidan "ravonlik" va "norozilik" degan juda xilma-xil atamalar o'rtasida chalkashliklarni keltirib chiqaradigan hislar mavjud.

Oddiy norozilik

Maktabgacha yoshdagi bolalar ko'pincha motorni rejalashtirish va bajarishda nutqda qiyinchiliklarga duch kelishadi; bu ko'pincha nutqni rivojlantirish bilan bog'liq disfluentsiyalar sifatida namoyon bo'ladi (odatdagi notekislik yoki "boshqa noaniqliklar" deb nomlanadi).[48] Ushbu noxushlik nutqni rivojlantirishning odatiy qismidir va nutqni o'rganayotgan maktabgacha yoshdagi bolalarda vaqtincha mavjud.[48] Ushbu odatdagi noxushliklar interjections ("Um"), ko'p satrli takrorlashlar ("Men buni qilishni xohlayman") yoki qayta ko'rib chiqilgan / tashlab qo'yilgan so'zlar ("Men xohlayman / u nima?") Shaklida bo'lishi mumkin.[48] Duduqlanishni tashxislashdan oldin normal kelishmovchiliklarni istisno qilish kerak.[49]

Tasnifi

Rivojlanishda duduqlanish (shuningdek, bolalik davridagi ravonlikning buzilishi deb ham ataladi) - bu keksa duduqlanish, bu bola gapirishni o'rganayotganda paydo bo'ladi va bola voyaga yetguncha davom etishi mumkin. Etti yoshdan keyin davom etadigan duduqlanish doimiy duduqlanish deb tasniflanadi.[48]

Duduqlanishning kamroq tarqalgan boshqa sabablari orasida neyrogen duduqlanish (miya shikastlanishidan keyin paydo bo'ladigan duduqlanish, masalan, qon tomiridan keyin) va psixogen duduqlanish (psixologik holat bilan bog'liq duduqlanish) kiradi.[48]

Duduqlanishga o'xshash alomatlari bo'lgan boshqa kasalliklar kiradi autizm, tartibsizlik, Parkinson kasalligi, muhim titroq, palilaliya, spazmodik disfoniya, selektiv mutizm va ijtimoiy tashvish.

Rivojlanish

Duduqlanish odatda rivojlanish buzilishi erta bolalikdan boshlanib, ta'sirlangan bolalarning kamida 20 foizida voyaga etmoqda.[21][50] Duduqlanishning o'rtacha boshlanishi 30 oy.[51] O'zgaruvchanlik mavjud bo'lsa-da, erta duduqlanish xatti-harakatlari odatda so'z yoki bo'g'inning takrorlanishidan iborat, zo'riqish, qochish yoki qochish kabi ikkinchi darajali xatti-harakatlar mavjud emas.[52] Ko'pgina yosh bolalar nutqidagi uzilishlar haqida bilishmaydi.[52] Yosh duduqlar bilan norozilik epizodik bo'lishi mumkin, duduqlanish davrlari esa nisbatan past darajadagi norozilik davrlariga to'g'ri keladi.[53]

Erta tiklanish darajasi juda yuqori bo'lsa ham,[21] vaqt o'tishi bilan duduqlanadigan yosh kishi oson, erkin takrorlanishdan keskinroq va kuchliroq duduqlanish, shu jumladan bloklar va uzaytirilishlarga o'tishi mumkin.[52] Ba'zilar ota-onalarning reaktsiyalari surunkali duduqlanishning rivojlanishiga ta'sir qilishi mumkin deb taxmin qilishadi. "Sekinlash", "nafas oling", "yana ayt" va hokazo tavsiyalar bolaning xavotirini va qo'rquvini kuchaytirishi mumkin, bu esa gapirishda ko'proq qiyinchiliklarga olib keladi va "duduqlanish tsiklida" yana ham ko'proq qo'rquvga olib keladi. , tashvish va duduqlanishni kutish.[54] Vaqt o'tishi bilan ikkilamchi duduqlanish, shu jumladan ko'zning miltillashi va lab harakatlari kabi qochish xatti-harakatlari, shuningdek, tovushlardan, so'zlardan, odamlardan yoki gaplashadigan vaziyatlardan qo'rqish va ulardan qochish mumkin. Oxir oqibat, ko'pchilik o'zlarining tartibsizliklari to'g'risida to'liq xabardor bo'lib, o'zlarini duduqlar deb bilishni boshlaydilar. Bu bilan yanada chuqur umidsizlik, xijolat va uyat paydo bo'lishi mumkin.[55] Duduqlanishning rivojlanishining boshqa nodir naqshlari, shu jumladan, bolaga to'satdan paydo bo'lishi, bunga urinishlarga qaramay, gapira olmaydiganligi tasvirlangan.[56] Bola odatda jumlaning birinchi tovushini ayta olmaydi va yuqori darajada ong va umidsizlikni namoyon etadi. Yana bir xilma-xillik so'z va iboralarni tez-tez takrorlash bilan to'satdan boshlanadi va ikkilamchi duduqlanish xatti-harakatlarini o'z ichiga olmaydi.[56]

Neyrogen qoqish

Duduqlanishga neyrofiziologiya ham sabab bo'ladi, deb ishoniladi. Neyrogen qoqish - ravonlik buzilishining bir turi bo'lib, unda odam nutqni odatiy, silliq tarzda chiqarishda qiynaladi. Ravshanoylik bilan og'rigan odamlarda nutq tarqoq yoki to'xtab turadigan, tez-tez to'xtab turadigan va harakat va kurashsiz so'zlarni ishlab chiqarishda qiyinchiliklarga duch keladigan nutqqa ega bo'lishi mumkin. Neyrogen qoqish odatda markaziy asab tizimidagi shikastlanish yoki kasallikdan so'ng paydo bo'ladi. Miya va o'murtqa shikastlanishlar, shu jumladan korteks, subkorteks, serebellar va hatto asab yo'li mintaqalari.[3]

Duduqlanishni sotib oldim

Kamdan kam hollarda kekemelik keksa yoshda bosh jarohati, o'sma, qon tomir yoki giyohvand moddalarni iste'mol qilish kabi nevrologik hodisalar natijasida paydo bo'lishi mumkin. Duduqlanish uning rivojlanish ekvivalentidan farq qiluvchi xususiyatlarga ega: u so'zma-so'z yoki ovozli takrorlash bilan cheklanib qolishga intiladi va nisbatan xavotir etishmasligi va ikkilamchi duduqlanish xatti-harakatlari bilan bog'liq. Rivojlanish holatiga ega bo'lganlarning noroziligini pasayishiga yordam beradigan o'zgartirilgan eshitish mulohazalari (quyida ko'rib chiqing) kabi usullar, olingan turga nisbatan samarali emas.[21][50][57]

Psixogen duduqlanish, shuningdek, qayg'u, munosabatlarning uzilishi yoki jismoniy shikastlanishga psixologik reaktsiya kabi travmatik tajribadan so'ng paydo bo'lishi mumkin. Uning alomatlari bir hil bo'lib qoladi: duduqlanish to'satdan paydo bo'ladi va muhim voqea bilan bog'liq, u doimiy va har xil nutqiy vaziyatlarga ta'sir qilmaydi va ma'ruzachi ko'rsatadigan xabardorlik va tashvish kam.[58]

Davolash

Davolashni boshlashdan oldin baholash kerak, chunki duduqlanishni tashxislash sertifikatlangan defektoped (SLP) malakasini talab qiladi.[59]Duduqlanishning to'liq davosi bo'lmasa-da, odamlarning nutqini yaxshiroq boshqarishlariga yordam beradigan bir nechta davolash usullari mavjud. Mavjud muolajalarning aksariyati tezlikni pasaytirish, nafasni tartibga solish va bir hecalı javoblardan uzoqroq so'zlarga va oxir-oqibat murakkab jumlalarga bosqichma-bosqich o'tish orqali duduqlanishni minimallashtirishni o'rganish strategiyasiga qaratilgan. Bundan tashqari, ba'zi duduqlanish terapiyalari ko'pincha duduqlanishdan kelib chiqadigan tashvishlarni bartaraf etishga yordam beradi va natijada duduqlanish alomatlarini kuchaytiradi.[60] Ushbu davolash usuli keng qamrovli yondashuv deb ataladi, bunda muolajaning asosiy ahamiyati ma'ruzachining muloqotga bo'lgan munosabatini yaxshilashga va nutq so'zlovchi hayotiga salbiy ta'sirini minimallashtirishga qaratilgan.[61] Malakali S-LP dan davolanish har qanday yoshdagi kekiklarga foyda keltirishi mumkin.[62]

Gap defektologlari duduqlanadigan odamlarga gapirish tezligini boshqarish va nazorat qilishni o'rgatadilar. Bundan tashqari, odamlar so'zlarni biroz sekinroq va jismonan taranglashmay gapirishni boshlashlari mumkin. Shuningdek, ular nafas olishlarini boshqarish yoki nazorat qilishni o'rganishlari mumkin. Nutq tezligini nazorat qilishni o'rganayotganda, odamlar odatda qisqa so'z birikmalaridan va jumlalardan foydalanib, odatdagi nutqga qaraganda ancha sustroq stavkalarda ravon va ravon nutq bilan mashq qilishni boshlaydilar. Vaqt o'tishi bilan odamlar tezroq, uzoqroq jumlalarda va qiyin vaziyatlarda nutq ravon va tabiiy chiqquncha silliq nutq so'zlashni o'rganadilar. Bolalardagi duduqlanishni davolashda ba'zi tadqiqotchilar tanlangan davolash usuli samarali ishlayaptimi yoki yo'qligini aniqlash uchun har uch oyda bir baholash o'tkazilishini tavsiya qiladilar. "Kuzatuv" yoki "texnik xizmat ko'rsatish" mashg'ulotlari ko'pincha retsidivatsiyani oldini olish uchun rasmiy aralashuv tugagandan so'ng talab qilinadi.[63]

Ravonlikni shakllantirish terapiyasi

"Tezroq gapirish", "cho'zilgan nutq" yoki "bog'langan nutq" deb ham ataladigan ravonlikni shakllantirish terapiyasi nafas olish, fonatsiya va artikulyatsiyani (lablar, jag 'va tilni) boshqarish orqali duduqlanadigan odamlarni ozroq noaniq gapirishga o'rgatadi. Bunga asoslanadi operatsion konditsionerligi texnikalar.[64]

Duduqlanadigan odamlar unli va undoshlarni cho'zish orqali, shuningdek, doimiy havo oqimi va yumshoq nutq bilan aloqa qilish kabi noaniqlikni kamaytiruvchi boshqa usullardan foydalangan holda nutq tezligini kamaytirishga o'rgatilgan. Natija juda sekin, monotonik, ammo ravon nutq, faqat nutq klinikasida qo'llaniladi. Duduqlanadigan kishi ushbu qobiliyatlarni o'zlashtirgandan so'ng, nutq darajasi va intonatsiyasi asta-sekin oshiriladi. Keyinchalik odatdagidek, ravon nutq nutq klinikasidan tashqaridagi kundalik hayotga o'tkaziladi, ammo davolash oxirida nutqning tabiiyligi yo'qligi tez-tez tanqid qilinadi. Ravonlikni shakllantirish yondashuvlari tez-tez intensiv guruhli terapiya dasturlarida o'qitiladi, ularni bajarish 2-3 haftagacha davom etishi mumkin.

O'zgartirish terapiyasi

Duduqlantirib modifikatsiya qilish terapiyasining maqsadi duduqlanishni yo'q qilish emas, balki duduqlanish osonroq va ozroq harakat qilish uchun uni o'zgartirishdir.[65] Mantiqiy asos shundaki, qo'rquv va xavotir duduqlanishni kuchayishiga olib keladi, chunki osonroq duduqlanishdan foydalaniladi va kamroq qo'rquv va qochish bilan duduqlanish kamayadi. Eng keng tarqalgan yondashuv tomonidan nashr etilgan Charlz Van Riper 1973 yilda va shuningdek, blok modifikatsiyasi terapiyasi sifatida tanilgan.[66] Biroq, bemorga qarab, nutq terapiyasi samarasiz bo'lishi mumkin.[67]

Elektron ravonlik moslamasi

Duduqlanadigan odamlar o'zlarining ovozini boshqacha eshitishi uchun eshitish teskari aloqasi o'zgargan, 50 yildan ortiq vaqtdan beri duduqlanishni davolashda ishlatilgan.[68] O'zgartirilgan eshitish teskari ta'sirini boshqa odam bilan xorda gaplashish, gaplashayotganda duduqlangan odamning ovozini to'sib qo'yish (maskalash), duduqlagan odamning ovozini biroz kechiktirish (eshitish haqidagi teskari aloqa) yoki chastotani o'zgartirish orqali hosil qilish mumkin. teskari aloqa (chastotani o'zgartirgan teskari aloqa). Ushbu texnikani o'rganish turli xil natijalarga olib keldi, duduqlanadigan ba'zi odamlar duduqlanishda sezilarli pasayishlarni ko'rsatmoqda, boshqalari esa biroz yaxshilandi yoki umuman yo'q.[68] Duduqlanish muolajalarining samaradorligini 2006 yilda ko'rib chiqishda, o'zgartirilgan eshitish teskari aloqasi bo'yicha o'tkazilgan biron bir tadqiqot eksperimental sifat mezonlariga javob bermadi, masalan, nazorat guruhlarining mavjudligi.[69]

Mobil ilovalar

Mobil dastur yordamida duduqlanishni davolash

Ixtisoslashgan mobil ilovalar va Kompyuter duduqlanishni davolash dasturlari. Ushbu turdagi qo'llanmalarning maqsadi nutq tsiklini tiklashdir - men aytaman -> eshitaman -> so'z birikmasini tuzaman -> aytmoqchiman va hokazo.[70]

Foydalanuvchi. Bilan o'zaro ta'sir qiladi dastur o'zgartirilgan orqali eshitish bo'yicha qayta aloqa: ular nimadir deyishadi naushnik mikrofon and listen to their own ovoz ichida minigarnituralar processed by a certain method.[70]

The following stutter correction methods are typically used in ilovalar:

  • MAF (Masking auditory feedback). It is basically masking by “oq shovqin ” or sinus noises of the user's own speech. Scientists believe that people who stutter can speak smoother when they do not hear their own nutq. This method is considered old-fashioned and ineffective.[71][72][73]
  • DAF (Delayed auditory feedback). This method involves sending the user's ovoz dan mikrofon uchun minigarnituralar with a delay of fractions of a second. The goal of this method is to teach people who stutter to drawl unlilar and reduce the speech rate. After speech correction with long delays, the application is adjusted at shorter delays which increase the speech rate until it becomes normal.[74][75]
  • FAF (Frequency-shifted auditory feedback). This method involves shifting the user's ovoz ohang chastota that they are listening to compared to their own ovoz. The shift range can be different: from several semitones to half an oktava.[76][77][78]
  • Foydalanish metronomes and tempo correctors. Ritmik metronom strikes are used in this method. The effectiveness of the method is related to the fact that rhythm has positive effect on someone who stutters, especially when pronouncing slowly.[79]
  • Using visual feedback. This method determines the user's speech parameters (for instance, speech tempo) and their representation on screen as visual information. The principal goal of the method is allowing the user to effectively manage their ovoz through achieving the defined targeted parameters. It is supposed that the user sees visual representation of both current and targeted parameters (such as speech tempo) on the screen while pronouncing.[80][81]

Dori vositalari

Although no medication is FDA approved for stuttering, several studies have shown certain medications to have beneficial effects on reducing the severity of stuttering symptoms. Although different classes of medications have been investigated, those with dopamine blocking activity have been shown in numerous trials to have positive effects on stuttering. These medications are FDA approved in the United States and hold similar approval in most countries for other conditions and their safety profiles are well established in these disorders.

The best studied medication in stuttering is olanzapine whose effectiveness has been established in replicated trials. Olanzapine acts as a dopamine antagonist to D2 receptors in the mesolimbic pathway, and works similarly on serotonin 5HT2A receptors in the frontal cortex.[82] At doses between 2.5–5 mg, olanzapine has been shown to be more effective than placebo at reducing stuttering symptoms, and may serve as a first-line pharmacological treatment for stuttering based on the preponderance of its efficacy data.[83][84] However, other medications are generally better tolerated with less weight gain and less risk of metabolic effects than olanzapine.

Risperidone and haloperidol have also shown effectiveness in the treatment of stuttering. However, haloperidol in particular often result in poor long-term compliance due to concerning side effects such as movement disorders and prolactin elevation, which can also occur with risperidone.[83][85] Other dopamine active medications reported to positively treat stuttering include aripiprazole, asenapine, lurasidone, which tend to be better tolerated than olanzapine with less weight gain. All these medications as well as olanzapine can carry the potential risk of a long-term movement disorder known as tardive dyskinesia.

The investigational compound, ecopipam is unique from other dopamine antagonists in that it acts on D1 receptors instead of D2, owing little, if any risk, of movement disorders. An open label study of ecopipam in adults demonstrated significantly improved stuttering symptoms with no reports of parkinsonian-like movement disorders or tardive dyskinesia which can be seen with D2 antagonists.[86] In addition, ecopipam had no reported weight gain, but instead has been reported to lead to weight loss.[86] In a preliminary study, it was well tolerated in subjects, effectively reduced stuttering severity, and was even associated in a short-term study with improved quality of life in persons who stutter.[86] Further research is still warranted, but this novel mechanism is showing promise in the pharmacologic treatment of stuttering.

One should always consult with a medical doctor before considering medication treatment of stuttering to review potential risks and benefits.

Qo'llab-quvvatlash

With existing behavioral and prosthetic treatments providing limited relief and pharmacologic treatments in need of FDA approval for widespread use, support groups and the self-help movement continue to gain popularity and support from professionals and from people who stutter. Self-help groups provide people who stutter a shared forum within which they can access resources and support from others facing the same challenges of stuttering.[60] One of the basic tenets behind the self-help movement is that since a cure does not exist, quality of life can be improved by not thinking about the stammer for prolonged periods. Psychoanalysis has claimed success in the treatment of stuttering.[87] Hypnotherapy has also been explored as a management alternative.[88][89][90] Support groups further focus on the fact that stuttering is not a physical impediment but a psychological one.[91]

Psychological approach

Kognitiv xulq-atvor terapiyasi has been used to treat stuttering.[92] Also sociological approaches has been explored regarding how social groups maintain stuttering through social norms.[93]

Diafragma bilan nafas olish

Several treatment initiatives, for example the McGuire programme,[94] and the Starfish Project advocate diaphragmatic breathing (yoki costal breathing) as a means by which stuttering can be controlled.

Prognoz

Among preschoolers with stuttering, the prognoz for recovery is good. Based on research, about 65% to 87.5% of preschoolers who stutter recover spontaneously by 7 years of age or within the first 2 years of stuttering,[48][51][95] and about 74% recover by their early teens.[96] In particular, girls seem to recover well.[96][97] For others, early intervention is effective in helping the child overcome disfluency.[98]

Once stuttering has become established, and the child has developed secondary behaviors, the prognosis is more guarded,[98] and only 18% of children who stutter after five years recover spontaneously.[99] Stuttering that persists after the age of seven is classified as persistent stuttering, and is associated with a much lower chance of recovery.[48] However, with treatment young children may be left with little evidence of stuttering.[98]

For adults who stutter, there is no known cure,[96] though they may make partial recovery or even complete recovery with intervention. People who stutter often learn to stutter less severely, though others may make no progress with therapy.[98]

Emotional sequelae associated with stuttering primarily relates to state-dependent anxiety related to the speech disorder itself. However, this is typically isolated to social contexts that require speaking, is not a trait anxiety, and this anxiety does not persist if stuttering remits spontaneously. Research attempting to correlate stuttering with generalized or state anxiety, personality profiles, trauma history, or decreased IQ have failed to find adequate empirical support for any of these claims.

Epidemiologiya

Hayot tarqalishi, or the proportion of individuals expected to stutter at one time in their lives, is about 5%,[100] and overall males are affected two to five times more often than females.[50][101][102] However, there is not much information known about the underlying cause for such a skewed sex ratio.[39] Most stuttering begins in early childhood, and studies suggest that 2.5% of children under the age of 5 stutter.[103][104] As seen in children who have just begun stuttering, there is an equivalent number of boys and girls who stutter. Still, the sex ratio appears to widen as children grow: among preschoolers, boys who stutter outnumber girls who stutter by about a two to one ratio, or less.[102][104] This ratio widens to three to one during first grade, and five to one during fifth grade,[105] as girls have higher recovery rates.[96] Due to high (approximately 65–75%) rates of early recovery,[101][106] the overall prevalence of stuttering is generally considered to be approximately 1%.[50][107]

Cross-cultural studies of stuttering prevalence were very active in early and mid-20th century, particularly under the influence of the works of Vendell Jonson, who claimed that the onset of stuttering was connected to the cultural expectations and the pressure put on young children by anxious parents. Johnson claimed there were cultures where stuttering, and even the word "stutterer", were absent (for example, among some tribes of Amerika hindulari ). Later studies found that this claim was not supported by the facts, so the influence of cultural factors in stuttering research declined. It is generally accepted by contemporary scholars that stuttering is present in every culture and in every race, although the attitude towards the actual prevalence differs. Some believe stuttering occurs in all cultures and races[22] at similar rates,[50] about 1% of general population (and is about 5% among young children) all around the world. A US-based study indicated that there were no racial or ethnic differences in the incidence of stuttering in preschool children.[103][104] At the same time, there are cross-cultural studies indicating that the difference between cultures may exist. For example, summarizing prevalence studies, E. Cooper and C. Cooper conclude: "On the basis of the data currently available, it appears the prevalence of fluency disorders varies among the cultures of the world, with some indications that the prevalence of fluency disorders labeled as stuttering is higher among black populations than white or Asian populations" (Cooper & Cooper, 1993:197). In his "Stuttering and its Treatment: Eleven lectures" Mark Onslow remarked that "one recent study with many participants (N=119,367)[108] convincingly reported more stuttering among African Americans than other Americans. Why this could be the case is challenging to explain..."[109]

Different regions of the world are researched very unevenly. The largest number of studies has been conducted in European countries and in North America, where the experts agree on the mean estimate to be about 1% of the general population (Bloodtein, 1995. A Handbook on Stuttering). African populations, particularly from West Africa, might have the highest stuttering prevalence in the world—reaching in some populations 5%, 6% and even over 9%.[110] Many regions of the world are not researched sufficiently, and for some major regions there are no prevalence studies at all (for example, in China). Some claim the reason for this might be a lower incidence in the general population in China.[111]

Tarix

Lyuis Kerol, the well-known author of Elisning mo''jizalar dunyosidagi sarguzashtlari, had a stammer, as did his siblings.

Because of the unusual-sounding speech that is produced and the behaviors and attitudes that accompany a stutter, it has long been a subject of scientific interest and speculation as well as discrimination and ridicule. People who stutter can be traced back centuries to the likes of Demosfen, who tried to control his disfluency by speaking with pebbles in his mouth.[112] The Talmud interprets Injil passages to indicate Muso was also a person who stuttered, and that placing a burning coal in his mouth had caused him to be "slow and hesitant of speech" (Exodus 4, v.10).[112]

Galen 's humoral theories were influential in Europe in the Middle Ages for centuries afterward. In this theory, stuttering was attributed to imbalances of the four bodily humors —yellow bile, blood, black bile, and phlegm. Hieronymus Mercurialis, writing in the sixteenth century, proposed methods to redress the imbalance including changes in diet, reduced libido (in men only), and tozalash. Believing that fear aggravated stuttering, he suggested techniques to overcome this. Humoral manipulation continued to be a dominant treatment for stuttering until the eighteenth century.[113] Partly due to a perceived lack of intelligence because of his stutter, the man who became the Rim imperatori Klavdiy was initially shunned from the public eye and excluded from public office.[112]

In and around eighteenth and nineteenth century Europe, surgical interventions for stuttering were recommended, including cutting the tongue with scissors, removing a triangular wedge from the posterior tongue, and cutting nerves, or neck and lip muscles. Others recommended shortening the uvula or removing the bodomsimon bezlar. All were abandoned due to the high danger of bleeding to death and their failure to stop stuttering. Less drastically, Jan Mark Gaspard Itard placed a small forked golden plate under the tongue in order to support "weak" muscles.[112]

Notker Balbulus, from a medieval manuscript.

Italyancha patolog Jovanni Morgagni attributed stuttering to deviations in the suyak suyagi, a conclusion he came to via otopsi.[113] Muborak Notker of St. Gall (c. 840–912), called Balbulus ("The Stutterer") and described by his biographer as being "delicate of body but not of mind, stuttering of tongue but not of intellect, pushing boldly forward in things Divine," was invoked against stammering.

A famous Briton who stammered was King Jorj VI. George VI went through years of speech therapy, most successfully under Australian speech therapist Lionel Logue, for his stammer. This is dealt with in the Academy Award-winning film Qirolning nutqi (2010) in which Kolin Fert plays George VI. Film asl ssenariysi asosida yozilgan Devid Zaydler who also used to stutter as a child until age 16.

Another notable case was that of British Prime Minister Uinston Cherchill. Churchill claimed, perhaps not directly discussing himself, that "[s]ometimes a slight and not unpleasing stammer or impediment has been of some assistance in securing the attention of the audience..."[114] However, those who knew Churchill and commented on his stutter believed that it was or had been a significant problem for him. Uning kotibi Phyllis Moir commented that "Winston Churchill was born and grew up with a stutter" in her 1941 book I was Winston Churchill's Private Secretary. She also noted about one incident, "'It’s s-s-simply s-s-splendid,' he stuttered—as he always did when excited." Louis J. Alber, who helped to arrange a lecture tour of the United States, wrote in Volume 55 of Amerika Merkuriysi (1942) that "Churchill struggled to express his feelings but his stutter caught him in the throat and his face turned purple" and that "born with a stutter and a xashak, both caused in large measure by a defect in his palate, Churchill was at first seriously hampered in his public speaking. It is characteristic of the man’s perseverance that, despite his staggering handicap, he made himself one of the greatest orators of our time."

For centuries "cures" such as consistently drinking water from a snail shell for the rest of one's life, "hitting a stutterer in the face when the weather is cloudy", strengthening the tongue as a muscle, and various o'simliklarni davolash vositalari ishlatilgan.[115] Similarly, in the past people have subscribed to theories about the causes of stuttering which today are considered odd. Proposed causes of stuttering have included qitiqlash an infant too much, eating improperly during emizish, allowing an infant to look in the mirror, cutting a child's hair before the child spoke his or her first words, having too small a tongue, or the "work of the devil".[115]

Some people who stutter, who are part of the nogironlik huquqlari harakati, have begun to embrace their stuttering voices as an important part of their identity.[116][117] In July 2015 the UK Ministry of Defence announced the launch of the Defence Stammering Network to support and champion the interests of British military personnel and MOD civil servants who stammer and to raise awareness of the condition.[118]

Jamiyat va madaniyat

Bilingual stuttering

Identifikatsiya

Bilingualism is the ability to speak two languages. Many bilingual people have been exposed to more than one language since birth and throughout childhood. Since language and culture are relatively fluid factors in a person's understanding and production of language, bilingualism may be a feature that impacts speech fluency. There are several ways during which stuttering may be noticed in bilingual children including the following.

  • The child is mixing vocabulary (code mixing) from both languages in one sentence. This is a normal process that helps the child increase his skills in the weaker language, but may trigger a temporary increase in disfluency.[119]
  • The child is having difficulty finding the correct word to express ideas resulting in an increase in normal speech disfluency.[119]
  • The child is having difficulty using grammatically complex sentences in one or both languages as compared to other children of the same age. Also, the child may make grammatical mistakes. Developing proficiency in both languages may be gradual, so development may be uneven between the two languages.[119]
  • Adding a second or third language between the ages of three and five years of age may cause stuttering to increase (become more severe). However, this may be the case only when: (1) the child's first language is not strong or the child is experiencing difficulties in her first language, (2) One language is used more than the other or, (3) the child resists speaking the additional language.

Stuttering may present differently depending on the languages the individual uses. For example, morphological and other linguistic differences between languages may make presentation of disfluency appear to be more or less of a problem depending on the individual case.[120]

Tadqiqot

Much research is being conducted to look at the prevalence of stuttering in bilingual populations and the differences between languages. For instance, one study concluded that bilingual children who spoke English and another language had an increased risk of stuttering and a lower chance of recovery from stuttering than monolingual speakers and speakers who spoke solely a language other than English.[121] Another study, though methodologically weak, showed relatively indistinguishable percentages of monolingual and bilingual people who stutter.[122] Due to so much conflicting data, the relationship between bilingualism and stuttering has been called enigmatic,[123] which can demonstrate the intricacies of the topic and encourages more research to be conducted in order to sway the belief of impact the relationship between bilingualism and stuttering has.

Ommaviy madaniyatda

Jazz va Eurodance musiqachi Skatman Jon qo'shig'ini yozdi "Skatman (Ski Ba Bop Ba Dop Bop) " to help children who stutter overcome adversity. Born John Paul Larkin, Scatman spoke with a stutter himself and won the American Speech-Language-Hearing Association's Annie Glenn Award for outstanding service to the stuttering community.[124]

Arkwright, the main protagonist in the BBC sitcom Barcha soatlarni oching, had a severe stutter that was used for comic effect.[125]

Shuningdek qarang

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