Functional architecture of eye position gain fields in visual association cortex of behaving monkey.
Functional architecture of eye position gain fields in visual association cortex of behaving monkey.
复制标题
行为猴视觉关联皮层中眼睛位置增益场的功能结构。
DOI：
10.1152/jn.01179.2002
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Jando,Gabor
中科院分区：
文献类型：
--
作者：
Siegel,RalphM;Raffi,Milena;Phinney,RaymondE;Turner,JessicaA;Jando,Gabor
在有行为的猴子中，下顶叶皮层神经元将视觉信息与眼睛位置信号结合起来。然而，这些神经元属性的有组织地形图从未被证明过。本征光学成像揭示了眼位对径向光流视觉响应影响的功能结构。该图谱分布在顶叶下小叶7a区和月前背区DP的两个细分区。区域7a包含下眼位置增益场的表示，而区域DP表示上眼位置增益场。水平眼位置与垂直眼位置在皮层的内侧外侧范围上是正交的。在两只猴子的三个脑半球也发现了类似的地形；水平和垂直增益场表示不是各向同性的，具有更大的调制发现与垂直。蒙特卡罗方法证明了这些地图的重要性，它们在一定程度上通过多单元记录得到了验证。这一关联皮层区域的新地形组织为构建感知周围空间的表征和运动行为的指导提供了基础。
In the behaving monkey, inferior parietal lobe cortical neurons combine visual information with eye position signals. However, an organized topographic map of these neurons' properties has never been demonstrated. Intrinsic optical imaging revealed a functional architecture for the effect of eye position on the visual response to radial optic flow. The map was distributed across two subdivisions of the inferior parietal lobule, area 7a and the dorsal prelunate area, DP. Area 7a contains a representation of the lower eye position gain fields while area DP represents the upper eye position gain fields. Horizontal eye position is represented orthogonal to the vertical eye position across the medial lateral extents of the cortices. Similar topographies were found in three hemispheres of two monkeys; the horizontal and vertical gain field representations were not isotropic with a greater modulation found with the vertical. Monte Carlo methods demonstrated the significance of the maps, and they were verified in part using multiunit recordings. The novel topographic organization of this association cortex area provides a substrate for constructing representations of surrounding space for perception and the guidance of motor behaviors.