ĐẶC ĐIỂM SÓNG ĐIỆN THẾ ÂM KHÔNG PHÙ HỢP (MISMATCH NEGATIVITY) Ở NGƯỜI VIỆT NAM BÌNH THƯỜNG TRONG ĐỘ TUỔI 18 – 21

Abstract

Objective: Describe the morphology, latency and peak amplitude of mismatch negativity (MMN) in normal Vietnamese aged 18 – 21 and assess some factors influencing MMN characteristics. Method: Cross-sectional description on 31 right-handed healthy volunteers (19 males and 12 females) aged 18-21. Subjets were recorded for MMN component based on Oddball paradigm at Cz-A12, C3-A12 and C4-A12. Results and conclusion: The MMN component was described in the study as the second negative component of long latency auditory evoked potential on the target stimulus recordings. The MMN peak amplitude and latency did not show significant differences between electrodes. The MMN peak amplitude had a strong inverse correlation with the P300 component peak amplitude. Regarding the influence of gender on the component characteristics, the MMN peak amplitude are larger in females compared to males at the C3-A12 and C4-A12, but there was not difference at the Cz-A12.