Enhancement of visual responses in monkey striate cortex and frontal eye fields.
Enhancement of visual responses in monkey striate cortex and frontal eye fields.
复制标题
增强猴子纹状皮层和额叶视野的视觉反应。
DOI：
10.1152/jn.1976.39.4.766
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发表时间：
1976
影响因子：
2.5
通讯作者：
C. W. Mohler
中科院分区：
文献类型：
--
作者：
R. Wurtz;C. W. Mohler
1.我们研究了猴子大脑皮层的两个区域的视觉增强效应。细胞对视觉刺激的反应是在猴子把视觉刺激作为扫视眼球运动的目标时和不这样做时确定的。2.在纹状皮质细胞与无方向，简单，复杂，超复杂的感受野类型进行了研究。当猴子把适当的视觉刺激作为眼跳的目标时，很少看到对该刺激的反应的明显增强。此外，观察到的任何增强效应都是非选择性的;无论猴子对感受野刺激还是远离感受野的其他刺激进行扫视，都会发生这种效应。无论猴子对刺激物进行扫视还是在刺激物变暗时仅仅释放横条，这种增强也会发生。3.纹状皮质的这种非选择性增强与上级丘的视觉反应的选择性增强形成鲜明对比。纹状皮质增强的不同特征和纹状皮质消融后丘增强的观察结果表明，该皮质区域不太可能是丘增强的来源。4.这些观察结果加强了纹状皮质和上级丘之间的区别。纹状皮层是一个很好的刺激特征分析器，但刺激的意义差的评价。上级丘是一个很好的评估者，但分析者很差。5.细胞具有清晰视觉反应的额眼区域已被更好地定位。这些细胞的视觉反应也会增强，并且至少对于某些细胞，反应增强是选择性的。反应增强，像这些额叶眼区细胞的视觉特性，似乎是更密切相关的上级丘细胞比纹状皮质细胞的属性。
1. We have studied the visual enhancement effect in two areas of the cerebral cortex of monkeys. The response of the cells to a visual stimulus was determined both when the monkey used the visual stimulus as the target for a saccadic eye movement and when he did not. 2. In striate cortex cells with nonoriented, simple, complex, and hypercomplex receptive-field types were studied. Clear enhancement of the response to the appropriate visual stimulus was seldom seen when the monkey used the stimulus as a target for a saccade. In addition, any enhancement effect seen was nonselective; it occurred whether the monkey made a saccade to the receptive-field stimulus or some other stimulus at a point distant from the receptive field. The enhancement also occurred whether the monkey made a saccade to the stimulus or just released the bar when the stimulus dimmed. 3. This nonselective enhancement in striate cortex is in striking contrast to the selective enhancement of the visual response seen in the superior colliculus. The different characteristics of the enhancement in striate cortex and the observation of enhancement in the colliculus following ablation of striate cortex suggest that this cortical area is an unlikely source of the collicular enhancement. 4. These observations reinforce the distinction between striate cortex and superior colliculus. Striate cortex is an excellent analyzer of stimulus characteristics but a poor evaluator of stimulus significance. The superior colliculus is an excellent evaluator but a poor analyzer. 5. The area of frontal eye fields in which cells have clear visual responses has been better localized. Enhancement of the visual response of these cells also occurs and, at least for some cells, the response enhancement is selective. The response enhancement, like the visual properties of these frontal eye field cells, appears to be more closely related to the properties of superior colliculus cells than to striate cortex cells.