Search efficiency but not response interference affects visual selection in frontal eye field

被引:140
作者
Sato, T
Murthy, A
Thompson, KG
Schall, JD
机构
[1] Vanderbilt Univ, Dept Psychol, Vanderbilt Vis Res Ctr, Nashville, TN 37240 USA
[2] NEI, Sensorimotor Res Lab, NIH, Bethesda, MD 20892 USA
关键词
D O I
10.1016/S0896-6273(01)00304-X
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Two manipulations of a visual search task were used to test the hypothesis that the discrimination of a target from distracters by visually responsive neurons in the frontal eye field (FEF) marks the outcome and conclusion of visual processing instead of saccade preparation. First, search efficiency was reduced by increasing the similarity of the distracters to the target. Second, response interference was introduced by infrequently changing the location of the target in the array. Both manipulations increased reaction time, but only the change in search efficiency affected the time needed to select the target by visually responsive neurons. This result indicates that visually responsive neurons In FEF form an explicit representation of the location of the target in the image.
引用
收藏
页码:583 / 591
页数:9
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