A backward progression of attentional effects in the ventral stream

被引:217
作者
Buffalo, Elizabeth A. [1 ,2 ]
Fries, Pascal [3 ,4 ]
Landman, Rogier [5 ]
Liang, Hualou [6 ]
Desimone, Robert [5 ]
机构
[1] Emory Univ, Sch Med, Yerkes Natl Primate Res Ctr, Atlanta, GA 30329 USA
[2] Emory Univ, Sch Med, Dept Neurol, Atlanta, GA 30329 USA
[3] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, NL-6525 EN Nijmegen, Netherlands
[4] Ernst Strungmann Inst Cooporat Max Planck Soc, D-60528 Frankfurt, Germany
[5] MIT, McGovern Inst Brain Res, Cambridge, MA 02139 USA
[6] Drexel Univ, Sch Biomed Engn, Philadelphia, PA 19104 USA
基金
美国国家卫生研究院;
关键词
attention; Macaque; vision; feedback; SELECTIVE VISUAL-ATTENTION; CORTICAL AREAS V1; NEURAL MECHANISMS; MACAQUE MONKEY; NEURONAL SYNCHRONIZATION; EXTRASTRIATE CORTEX; DIRECTED ATTENTION; STIMULUS SELECTION; SPATIAL ATTENTION; V4;
D O I
10.1073/pnas.0907658106
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The visual processing of behaviorally relevant stimuli is enhanced through top-down attentional feedback. One possibility is that feedback targets early visual areas first and the attentional enhancement builds up at progressively later stages of the visual hierarchy. An alternative possibility is that the feedback targets the higher-order areas first and the attentional effects are communicated "backward" to early visual areas. Here, we compared the magnitude and latency of attentional enhancement of firing rates in V1, V2, and V4 in the same animals performing the same task. We found a reverse order of attentional effects, such that attentional enhancement was larger and earlier in V4 and smaller and later in V1, with intermediate results in V2. These results suggest that attentional mechanisms operate via feedback from higher-order areas to lower-order ones.
引用
收藏
页码:361 / 365
页数:5
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