CAJ | 학술논문

目的研究了视(V)、听(A)单模靶刺激与视听双模联合靶刺激(VA)条件下大脑认知作用的差异,进而讨论了双模增进作用的神经机制.方法采用64道脑电(EEG)信号采集系统,记录了14个被试者在视觉、听觉和视听联合靶刺激条件下的脑诱发电位和行为学数据.检测了单模与双模间行为学[反应时间(RT)与错误率(ER)]和事件相关电位(ERPs)(P2峰值和峰值潜伏期,P3峰值和峰值潜伏期)结果的差异;分析了行为学与ERPs数据间的相关性.结果结果显示RT、ER和P3峰值潜伏期在单模与双模间的差异具有统计学意义;P3峰值潜伏期与行为学数据特别是反应时间有显著性相关.结论通过对比视听双模靶刺激和视、听单模靶刺激的行为学和ERPs结果,提示相对视、听单模靶刺激,视听双模靶刺激不仅在早期ERP成份(P1和N1)而且在晚期ERP成分(P2和P3),都表现出优越的感觉信号神经处理机制.
목적 연구료시(V)、은(A)단모파자격여시은쌍모연합파자격(VA)조건하대뇌인지작용적차이,진이토론료쌍모증진작용적신경궤제.방법 채용64도뇌전(EEG)신호채집계통,기록료14개피시자재시각、은각화시은연합파자격조건하적뇌유발전위화행위학수거.검측료단모여쌍모간행위학[반응시간(RT)여착오솔(ER)]화사건상관전위(ERPs)(P2봉치화봉치잠복기,P3봉치화봉치잠복기)결과적차이;분석료행위학여ERPs수거간적상관성.결과 결과현시RT、ER화P3봉치잠복기재단모여쌍모간적차이구유통계학의의;P3봉치잠복기여행위학수거특별시반응시간유현저성상관.결론 통과대비시은쌍모파자격화시、은단모파자격적행위학화ERPs결과,제시상대시、은단모파자격,시은쌍모파자격불부재조기ERP성빈(P1화N1)이차재만기ERP성분(P2화P3),도표현출우월적감각신호신경처리궤제.
Objective To investigate the cognitive difference between uni-modal (V,A) and bi-modal (VA)target stimuli from both vision and audition,and then to study the neural mechanisms of bi-modal enhancement.Methods This experiment adopted a speeded target stimuli detection task, both behavioral and electroencephalographic responses to uni-modal and bi-modal target stimuli which were combined from visual and auditory target stimuli,were recorded from 14 normal subjects using a 64-channel EEG NeuroScan system.The differences of cognitive between uni-modal and bi-modal stimulus were tested from both behavioral (reaction time (RT) and error rate (ER)) and event-related potentials (ERPs) (P2 latency and amplitude,P3 latency and amplitude)data,and the correlation between behavioral and ERPs results were analyzed.Results As a result,the RT,ER and P3 latency has significant difference between uni-modal and bi-modal target stimuli.In addition,there were significant correlation between behavioral data and P3 latency,especially from the RT and P3 latency.Conclusion By comparing the difference between uni-modal and bi-modal from both behavioral and ERPs results,we could reached the conclusion that the neural mechanism of bi-modal target detection was predominant over that of vision and audition uni-modal target detection,the enhancement take place not only involved in early ERP components (such as P1 and N1),but engaged at the late ERP components (such as P2 and P3).