INHIBITORY EFFECT OF REMOTE VISUAL-STIMULI ON VISUAL RESPONSES OF CAT SUPERIOR COLLICULUS - SPATIAL AND TEMPORAL FACTORS
INHIBITORY EFFECT OF REMOTE VISUAL-STIMULI ON VISUAL RESPONSES OF CAT SUPERIOR COLLICULUS - SPATIAL AND TEMPORAL FACTORS
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DOI：
10.1152/jn.1974.37.6.1262
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发表时间：
1974-01-01
影响因子：
2.5
通讯作者：
PISA, M
中科院分区：
文献类型：
--
作者：
RIZZOLATTI, G;CAMARDA, R;PISA, M
本论文描述了我们在实验中研究了远离单元感受野兴奋部分的视觉刺激对上丘（SC）神经元对移动视觉刺激的反应的影响。我们认为这样的研究，以前只在视网膜上进行了一些细节（5,15 - h），考虑到SC在视觉系统中的特殊解剖和功能位置，在SC中进行将是有趣的。一方面，SC接收来自视网膜的直接投射，位于视层以上各层的神经元具有清晰的感觉特性（3，S,- 11,22,23,26,28,29,32）；另一方面，SC与控制眼睛和头部运动的运动中心相连（尽管是间接的），视层以下各层的神经元通常具有主要的运动特征，在某些情况下仅具有运动特征（12,23,31,34）。如果有人假设，正如经常提出的那样（参见文献1,2），当两个不相容的运动反应同时发送到大脑时，需要更多的感觉信息，在命令到达运动中心之前，它们之间确实发生了一些相互作用，那么SC的特性表明该中心可能是这种相互作用发生的地方。我们通过在单元放电区远处的位置引入视觉刺激来检验这种可能性，此时，一个collcollar单元被另一个视觉刺激触发。我们发现感觉信息之间的相互作用确实发生在SC的感觉部分，而且这种相互作用是抑制性的。一部分
THE PRESENT PAPER describes experiments in which we studied the influence of visual stimuli located very far from the excitatory part of the unit receptive field on the responses of superior colliculus (SC) neurons to moving visual stimuli. We felt that such a study, previously carried out in some detail only in the retina (5, 15-H), would be interesting to perform in the SC given its particular anatomical and functional position in the visual system. On the one hand the SC receives direct projections from the retina, and the neuronslocated in the layers above the stratum opticum have clear sensory properties (3, S,-11, 22, 23, 26, 28, 29, 32); on the other hand the SC is connected, however indirectly, to motor centers controlling eye and head movements, and the neurons of the layers below the stratum opticum often have predominantly, and in some cases exclusively, motor characteristics (12, 23, 31, 34). If one assumes, as has been often proposed (see ref 1, 2), that or more sensory messages requiri when two ng incompatible motor responses are simultaneously sent to the brain some interaction does occur between them before commands arrive at the motor centers, then the properties of the SC indicate this center as a likely site where such an interaction may take place. We examined this possibility by introducing visual stimuli located at remote positions from the unit discharge area at the moment in which a collicular unit was triggered by another visual stimulus. We found that an interaction between sensory messages does occur in the sensory part of the SC and that this interaction is an inhibitory one. A part