Figure-ground segregation requires two distinct periods of activity in VI: a transcranial magnetic stimulation study

被引：69
作者：
Heinen, K
Jolij, J
Lamme, VAF
机构：
[1] UCL, Wellcome Dept Imaging Neurosci, Anat Dept, London WC1E 6BT, England
[2] Univ Amsterdam, Netherlands Opthalm Res Inst, Cognit Neurosci Grp, Dept Psychol, Amsterdam, Netherlands
来源：
NEUROREPORT | 2005年 / 16卷 / 13期
关键词：
figure-ground segregation; primary visual cortex; transcranial magnetic stimulation;
D O I：
10.1097/01.wnr.0000175611.26485.c8
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
Discriminating objects from their surroundings by the visual system is known as figure-ground segregation. This process entails two different subprocesses: boundary detection and subsequent surface segregation or 'filling in: In this study, we used transcranial magnetic stimulation to test the hypothesis that temporally distinct processes in VI and related early visual areas such as V2 or V3 are causally related to the process of figure-ground segregation. Our results indicate that correct discrimination between two visual stimuli, which relies on figure-ground segregation, requires two separate periods of information processing in the early visual cortex: one around 130-160 ms and the other around 250-280 ms.
引用
收藏
页码：1483 / 1487
页数：5
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