The fine structure of shape tuning in area V4.
The fine structure of shape tuning in area V4.
复制标题
DOI:
10.1016/j.neuron.2013.04.016
复制
发表时间:
2013-06-19
期刊:
影响因子:
16.2
通讯作者:
Mitchell JF
中科院分区:
文献类型:
--
作者:
Nandy AS;Sharpee TO;Reynolds JH;Mitchell JF
Previous studies have shown that neurons in area V4 are involved in the processing of shapes of intermediate complexity and are sensitive to curvature. These studies also suggest that curvature tuned neurons are position-invariant. We sought to examine the mechanisms that endow V4 neurons with these properties. Consistent with previous studies, we found that response rank•order to the most• and least•preferred stimuli were preserved throughout the RF. However, a fine-grained analysis of shape tuning revealed a surprising result: V4 neurons tuned to highly curved shapes exhibit very limited translation invariance. At a fine spatial scale, these neurons exhibit local variation in orientation. In contrast, neurons that prefer straight contours exhibit spatially-invariant orientation tuning, and homogenous fine-scale orientation maps. Both these patterns are consistent with a simple orientation-pooling model, with tuning for straight or curved shapes resulting, respectively, from pooling of homogenous or heterogeneous orientation maps inherited from early visual areas.
登录
查看更多内容
影响因子:
5.4
作者:
ATTNEAVE, F
通讯作者:
ATTNEAVE, F
DOI:
10.1523/jneurosci.3766-09.2010
发表时间:
2010-02-24
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Lee J;Maunsell JH
通讯作者:
Maunsell JH
影响因子:
5.3
作者:
Bodelon, Clara;Fallah, Mazyar;Reynolds, John H.
通讯作者:
Reynolds, John H.
影响因子:
3.7
作者:
Felleman, Daniel J.;Van Essen, David C.
通讯作者:
Van Essen, David C.
DOI:
10.1523/jneurosci.4496-08.2009
发表时间:
2009-05-06
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Motter BC
通讯作者:
Motter BC