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Yıl:2015; Cilt: 2; Sayı: 3>> Özet
TAM METİN
The Journal of Neurobehavioral Sciences; 2015;2(3):91-96
Hintli Yetişkinlerlerdeki Hindu Konuşma Uyaranına Karşı İşitsel Beyinsapı Elektrofizyolojik Ölçümünün Yanıtları
MS Ansari, R Raghunathrao
Ali Yavar Jung National Institute for the Hearing Handicapped, Mumbai, India
İşitsel beyin sapı uyarılmış konuşma yanıtları (spABR) konuşmayı kodlamak için beyin sapı becerilerini belirler. Ancak, beyin sapındaki konuşma simgeleri konuşmanın, dil geçmişinin ve deneyimlerinin akustik özelliklerinden etkilenir. Hindu dili, farklı işitsel beyin sapı yanıtlarını ortaya çıkarabilen hatırı sayılır derecede akustik farklılıklar içerir. Bu yüzden, amacımız normal duyabilen yetişkinlerdeki Hindu uyaranına karşı işitsel beyin sapı uyarılmış konuşma yanıtlarını (spABR) araştırmaktı. 18-25 yaş aralığındaki 22.7 yaş ortalamasındaki(SD=2.3) normal duyabilen 50 yetişkinin işitsel beyin sapını ortaya çıkarmak için 5 tane Hindu biçimlendirici durağı olan |da| sentezlendi. Gecikme süresi ve çokluğunun uyaranların ünsüz ve ünlü kısımlarına karşı korteks altı cevabı kaydedildi. Sonuçlar: İşitsel beyin sapı uyarılmış konuşma yanıtları (spABR) uyaran bileşenleri için farklı hece ortaları ortaya çıkardı. Ünsüz kısmı V hece ortasını ve ünlü kısmı da sıklığı izleyen yanıt(FFR) ortaya çıkardı. Hece ortası gecikme süresi ve çokluğunun ortalama, ortanca, standart sapma, minimum, maksimum ve %95 güven aralığı ölçüldü. Şuanki spABR ve batı dataları arasındaki %5lik önem seviyesinde ANOVA incelendi. Sonuçlar: Uyaranların uzun ve kısa süreli kısımlarının edinilen beyin sapı zamanlama ve çokluk değerleri batı datalarıyla aynı doğrultudadır. Ancak, Hint dillerindeki akustik farklılıklar göz önünde bulundurularak kültürel ve dilbilimsel olarak hassas uyaranlar imkanlar dahilinde geliştirilmeli ve normalar oluşturulmalıdır.
Electrophysiological Measures of Auditory Brainstem Responses to Hind Speech Stimulus in Indianu Adults
Speech evoked auditory brainstem responses (spABR) assesses brainstem ability to encode speech. However, speech representations at brainstem are affected by acoustic properties of speech, language background and experiences. Hindi has considerable acoustic differences that may evoke dissimilar ABR pattern. Therefore, our objective was to investigate the spABR to Hindi stimulus in normal hearing adults. The 5 formants Hindi stop |da| of 40ms was synthesized to elicit ABRs from 50 normal hearing adults with mean age of 22.7 (SD=2.3) years in the age range 18-25 years. The sub-cortical response latency & amplitude to consonant and vowel portion of the stimulus were recorded. Results: The spABR elicited distinctive peaks for stimulus component. The consonant portion evoked peak V and vowel portion elicited the frequency following response (FFR). The mean, median, standard deviation, minimum, maximum and 95% confidence interval of peak latency & amplitude were measured. ANOVA was studied at 5% significance levels between the current spABR and western data. Conclusions: The obtained brainstem response timing and amplitude values of transient and sustained portion of stimulus are in line with the western reports. However, considering the acoustic differences in Indian languages, culturally & linguistically sensitive stimulus should possibly be developed and norms be established.

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