[视觉诱发电位负向成分在不完整图像分类机制中的作用]

[The negative components of visual evoked potentials in the mechanisms of the classification of incomplete images].

作者信息

Lytaev S A, Shostak V I

出版信息

Zh Vyssh Nerv Deiat Im I P Pavlova. 1993 Sep-Oct;43(5):851-9.

Abstract

Event-related brain potentials were recorded in 16 young adult subjects in response to a short presentation of recognizable and nonrecognizable visual images with an incomplete set of signs. Sequential brain maps and amplitude-temporal ERP parameters in 1000 ms poststimulus epoch were estimated (BMDP 4M and 7M, 1987). The results suggested that the component N450 was specifically related to a perception of nonrecognizable visual images. N70 and N150 reflected voluntary attention during invariant recognition and the late negative waves (600-1000 ms) reflected an "exhaustive search" for categorization of new information.

摘要

在16名年轻成年受试者中记录了与事件相关的脑电位，这些受试者对呈现的一组带有不完整特征的可识别和不可识别视觉图像进行短暂反应。估计了刺激后1000毫秒内的连续脑图谱和振幅-时间ERP参数（BMDP 4M和7M，1987）。结果表明，N450成分与对不可识别视觉图像的感知特别相关。N70和N150反映了在不变识别过程中的自主注意力，而晚期负波（600 - 1000毫秒）反映了对新信息分类的“详尽搜索”。