Auditory Change Detection Process Using Speech Stimuli in Children with Cochlear Implant

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 643

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شناسه ملی سند علمی:

HBMCMED05_016

تاریخ نمایه سازی: 1 دی 1397

چکیده مقاله:

1. BackgroundThis study aimed to investigate change detection of speech stimuli by means of topographical maps of MMNresponses in normal and cochlear implant (CI) Persian-speaking children.2. MethodTwenty subjects with CI and ten right-handed matched subjects, without visual acuity and neurologicaldisorders, participated in the study. A new auditory paradigm by 64 channels EEG machine was used withthree deviant stimuli (/gam/, /jam/, and /tam/) which differed in the first consonant from a repeated standardword (/dam/).3. ResultsThe results showed that MMN observed in 375-395 ms in fronto-central scalps (ROIs) in all stimuli. A positivemismatch response appeared before MMN only in /tam/ stimuli in 253 ms. In good cochlear implants (CI), Ap-MMR instead of MMN observed in /gam/ stimuli in 219 ms after the onset of stimuli. Also, the coexistenceof p-MMR and MMN acquired in 227 and 375 ms in /tam/ stimuli. In poor cochlear implants, no significantp-MMR and MMN was found in /gam/ stimuli. MMN observed only in /jam/ stimuli. P-MMR observed only in/tam/ in 242 ms. MMN was delayed in this group. The correlation between electrophysiological indexes andbehavioral tests was statistically significant.4. ConclusionsMMN and p-MMR can be used as a powerful electrophysiological index for objective assessment of phonologicalauditory discrimination. The existence of p-MMR in CI children shows immature brain pattern and/orexcessive neural activation to stimuli. In poor CI, MMN shows the involvement of somatosensory processingsites in the processing of complex lingual stimuli.

نویسندگان

Saeid Mahmoudian

ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences Hazrate Rasoul Akram Hospital, Neyiayesh St., Sattarkhan Ave., Tehran, Iran

Zohreh Ziatabar Ahmadi

ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences Hazrate Rasoul Akram Hospital, Neyiayesh St., Sattarkhan Ave., Tehran, Iran

Hasan Ashayeri

ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences Hazrate Rasoul Akram Hospital, Neyiayesh St., Sattarkhan Ave., Tehran, Iran

Mohammad Farhadi

ENT and Head & Neck Research Center and Department, Iran University of Medical Sciences Hazrate Rasoul Akram Hospital, Neyiayesh St., Sattarkhan Ave., Tehran, Iran