RELATION OF CORTICAL AREAS MT AND MST TO PURSUIT EYE-MOVEMENTS .3. INTERACTION WITH FULL-FIELD VISUAL-STIMULATION
RELATION OF CORTICAL AREAS MT AND MST TO PURSUIT EYE-MOVEMENTS .3. INTERACTION WITH FULL-FIELD VISUAL-STIMULATION
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DOI：
10.1152/jn.1988.60.2.621
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发表时间：
1988-08-01
影响因子：
2.5
通讯作者：
WURTZ, RH
中科院分区：
文献类型：
--
作者：
KOMATSU, H;WURTZ, RH
1.追踪眼球运动通常是在通过追踪运动而在视网膜上移动的视觉背景下进行的。我们研究了这种视觉刺激对猴子上级颞沟（STS）内的追踪细胞反应的影响。2.我们将这些追踪细胞分为两组，这取决于它们偏好的视觉刺激的性质。一组细胞，包括位于内侧上级颞区（MSTd）的背内侧区域的所有细胞和外侧前MST（MST 1）的一些细胞，对大图案场的运动有反应，但对小斑点或狭缝几乎没有反应。另一组，包括所有的中央凹中颞区（MTF）细胞和许多MST 1细胞，优先响应小斑点运动或同样好的小斑点运动或大字段。3.对于许多追求细胞，更喜欢大的领域的刺激，视觉反应表现出逆转的首选方向的运动作为刺激领域的大小增加。当用作刺激的移动随机点场的大小从20 x 20度增加到30 x 30度时，通常会发生反转，运动速度约为10度/秒。导致偏好方向反转的场刺激的大小取决于刺激运动的速度。更高的运动速度需要更大的刺激场来产生优选方向的反转。这种反转（偏好方向）并不反映感受野的中心-环绕组织，但似乎反映了这些细胞的空间总和特性。4.对于四分之三的细胞，更喜欢大场刺激，运动的首选方向为大场是相反的首选方向的追求反应。其余的细胞表现出相同的大视野视觉刺激和追求反应的首选方向或双向视觉反应。如果我们只考虑那些对大视野和小视野刺激的偏好方向相反的细胞，那么大视野的偏好方向总是与追逐方向相反，而小视野的偏好方向总是相同的。5.在对一个明亮的背景追求，显示相反的大领域的刺激和追求的首选方向的细胞有协同反应-在黑暗中的追求过程中的反应，促进追求的反应。缓慢的追逐速度（小于20度/秒）产生最大的促进作用。（400字处截断摘要）
1. Pursuit eye movements are usually made against a visual background that is moved across the retina by the pursuit movement. We have investigated the effect of this visual stimulation on the response of pursuit cells that lie within the superior temporal sulcus (STS) of the monkey. 2. We assigned these pursuit cells to one of two groups depending on the nature of their preferred visual stimulus. One group of cells, comprising all cells located in the dorsal-medial region of the medial superior temporal area (MSTd) and some cells in lateral-anterior MST (MST1), responded to the motion of a large patterned field but showed little or no response to small spots or slits. The other group, consisting of all foveal middle temporal area (MTf) cells and many MST1 cells, responded preferentially to small spot motion or equally well to small spot motion or large field. 3. For many pursuit cells that preferred large-field stimuli, the visual response showed a reversal of the preferred direction of motion as the size of the stimulus field increased. The reversal usually occurred as the size of the moving random-dot field used as a stimulus increased in size from 20 x 20 degrees to 30 x 30 degrees for motion at approximately 10 degrees/s. The size of the filed stimulus leading to reversal of preferred direction depended on the speed of stimulus motion. Higher speeds of motion required larger stimulus fields to produce a reversal of preferred direction. This reversal (of preferred direction) did not reflect a center-surround organization of the receptive field but seemed to reflect the spatial summation properties of these cells. 4. For three-quarters of the cells that preferred large-field stimulation, the preferred direction of motion for the large field was opposite to the preferred direction of the pursuit response. The remaining cells showed either the same preferred directions for large-field visual stimulation and the pursuit response or had bidirectional visual responses. If we consider only the cells that show a reversal of preferred direction for large- and small-field stimuli, the preferred direction for the large field was always the opposite to that of pursuit, and the preferred direction for the small field was always the same. 5. During pursuit against a lighted background, the cells that showed opposite preferred directions for large-field stimulation and pursuit had synergistic responses--a facilitation of the pursuit response over the response during pursuit in the dark. Slow pursuit speeds (less than 20 degrees/s) produced the greatest facilitation.(ABSTRACT TRUNCATED AT 400 WORDS)