Response properties of neurons in posterior parietal cortex of monkey during visual-vestibular stimulation. I. Visual tracking neurons.
Response properties of neurons in posterior parietal cortex of monkey during visual-vestibular stimulation. I. Visual tracking neurons.
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视觉前庭刺激期间猴子后顶叶皮层神经元的反应特性。
DOI：
10.1152/jn.1984.51.2.340
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发表时间：
1984
影响因子：
2.5
通讯作者：
M. Yamashita
中科院分区：
文献类型：
--
作者：
K. Kawano;M. Sasaki;M. Yamashita
对警觉猴7a区或PG（24）区的163个视觉跟踪神经元进行了细胞外记录。在猴子坐在椅子上，头部固定，以及猴子被训练连续注视的视觉目标的运动过程中观察到放电模式。水平视觉跟踪神经元分为三组，A，B，和C，根据以下两个放电特征：方向偏好的视觉跟踪和响应水平正弦振荡的椅子在黑暗中。在黑暗条件下对椅式振荡无反应的神经元为A型（26/53）。在其余的人中，那些在视觉跟踪过程中表现出相同方向偏好的人被归类为B型（19/53），而那些表现出相反方向偏好的人被归类为C型（8/53）。当目标和椅子一起摆动时，猴子取消了前庭眼反射（VOR）（眼睛和头部跟踪的组合），大多数视觉跟踪神经元（A型和B型，32/38）继续以与椅子静止时视觉跟踪相同的方式做出反应。C型神经元仅表现出微弱的反应。当猴子固定在地面上的目标，而椅子是正弦振荡（VOR目标任务），A型和B型神经元的反应比在视觉跟踪小得多，而C型神经元明显调制。结果表明，视觉跟踪神经元接收信息的平滑追求命令在合并的眼睛和头部（凝视）的运动;有些还接收前庭信息，除了追求命令信息。
Extracellular recordings were obtained from 163 visual tracking neurons in area 7a or PG (24) of alert monkeys. The firing patterns were observed during movements of the chair in which the monkey was seated with its head fixed and of a visual target that the monkey was trained to fixate continuously. Horizontal visual tracking neurons were classified into three groups, A, B, and C, on the basis of the following two discharge characteristics: directional preference for visual tracking and response to horizontal sinusoidal oscillation of the chair in the dark. Those neurons that did not respond to chair oscillations in the dark were classified as type A (26/53). Of the remainder, those that responded with the same directional preference as during visual tracking were classified as type B (19/53), and those that showed the opposite directional preference were classified as type C (8/53). When the target and the chair were oscillated together and the monkey canceled the vestibuloocular reflex (VOR) (combined eye and head tracking), most of the visual tracking neurons (types A and B, 32/38) continued to respond in the same way as during visual tracking when the chair was stationary. Type C neurons showed only weak responses. When the monkey fixated an earth-fixed target while the chair was oscillated sinusoidally (VOR target task), responses of the types A and B neurons were much smaller than during visual tracking, while type C neurons were clearly modulated. The results suggest that visual tracking neurons receive information concerning the smooth-pursuit command during combined eye and head (gaze) movements; some also receive vestibular information in addition to the pursuit command information.