The Journal of Neurobehavioral Sciences

Yazarlar: Mohammad Shamim Ansari , Rangasayee Raghunathrao

Konular:-

DOI:10.5455/JNBS.1437462757

Anahtar Kelimeler:-

Özet: 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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