کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3047570 1185059 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The representation of voice onset time in the cortical auditory evoked potentials of young children
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی عصب شناسی
پیش نمایش صفحه اول مقاله
The representation of voice onset time in the cortical auditory evoked potentials of young children
چکیده انگلیسی

ObjectiveThe aim of this study was to determine whether, in young children, a cortical neurophysiologic representation of the voicing status of a stop consonant could be found in the absence of the N1 component in the cortical auditory evoked potential (CAEP). In adults, a ‘double-on’ N1 response is often considered a cortical marker of VOT representation.MethodsScalp-recorded CAEPs were measured from six electrode sites in 10 children aged 4–8 years in response to a /da/–/ta/ continuum in which voice onset times (VOTs) varied from 0 to 60 ms. CAEPs were also recorded from Cz in a group of eight children aged 2–3 years in response to stimuli with VOTs of 0 and 60 ms.ResultsCortical evoked responses elicited by stimuli with VOT values ranging from 0 to 60 ms (i.e., by stimuli perceived as /da/ and /ta/) were similar in morphology. There was no evidence of a ‘double-on’ morphology for stimuli with long VOTs. However, latency changes in the P1 and N2 components were observed as a function of VOT changes.ConclusionsOur results demonstrate that a representation of VOT, as recorded by scalp electrodes, exists in the developing cortical evoked response, but that representation is different than that in the adult response. The results describe the developmental changes in cortical representation of VOT in children ages 2–8 years.SignificanceThe child’s CAEP reflects physiologic processes, which are involved in the cortical encoding of VOT. Overall, cortical representation of VOT in children ages 2–8 is different than in adults.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Clinical Neurophysiology - Volume 119, Issue 12, December 2008, Pages 2855–2861
نویسندگان
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