VISUAL RECEPTIVE FIELDS OF SINGLE CELLS IN PIGEONS OPTIC TECTUM
VISUAL RECEPTIVE FIELDS OF SINGLE CELLS IN PIGEONS OPTIC TECTUM
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DOI：
10.1016/0006-8993(72)90136-9
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发表时间：
1972-01-01
期刊：
影响因子：
2.9
通讯作者：
GUICHARD, J
中科院分区：
文献类型：
--
作者：
JASSIKGE.D;GUICHARD, J
使用细胞外记录研究了鸽子视顶盖内的三百九十四个单位。根据它们的感受野特性，它们被分为 4 个主要类别。 (1) 同心组织场（6%），由中心“开”和对立的周围“关”组成，反之亦然。中心和周围具有相同的光谱灵敏度。穿过中心-环绕的白点或黑点的运动对所有运动方向引起同样强烈的反应。 (2) 具有均匀“开”或“关”场的细胞 (1.3%) 对闪光反应良好，但没有对抗性周围环境。 (3) 运动选择性细胞 (72%) 优先对运动刺激做出反应，而对静态点反应较差或根本不反应。根据感受野的大小，这些感受野被分为“小”（2°）、“中”（5°）和“大视野”（31°）。具有“大视野”的细胞总是出现在电极穿透的最深部分（1100μm至1400μm）。 (4) 方向选择性细胞 (21%) 对点在一个“首选”方向上的运动做出最佳反应，而不是对相反方向“无效”的运动做出最佳反应。它们总是在 1000 μm 以上的表面穿透范围内记录。尽管鸽子视顶盖中的细胞似乎优先受到移动物体的刺激，但方向选择性似乎是顶盖浅层的一个特征。这些结果与其他研究一起表明，鸽子顶盖的“输出”可能携带定向编码信号。
Three hundred and ninety-four units within the optic tectum of pigeons were studied using extracellular recording. According to their receptive field properties, they were classified in 4 major classes. (1) Concentrically organized fields (6%), composed of a center ‘on’ and an antagonistic surround ‘off’, or the reverse. The center and the surround had identical spectral sensitivities. Motion of a white or black spot across the center-surround evoked equally strong responses for all directions of movement. (2) Cells with homogeneous ‘on’ or ‘off’ fields (1.3%) respond well to flashes of light, but have no antagonistic surround. (3) Movement selective cells (72%) respond preferentially to moving stimuli, and poorly or not at all to static spots. According to the size of their receptive fields these were classified as ‘small’ (2°), ‘middle’ (5°) and ‘large field’ (31°). Cells with ‘large fields’ were always found at the deepest part of the electrode penetration (1100 μm to 1400 μm). (4) Directionally selective cells (21%) respond optimally to motion of the spot in one direction ‘preferred’ and not to movement in the opposite direction ‘null’. They were always recorded in the superficial range of penetration, above 1000 μm. Although the cells in the pigeon's optic tectum seem to be preferentially stimulated by moving objects, directional selectivity appears to be a characteristic of the superficial tectal layers. These results, together with other studies, suggest that the ‘output’ of the pigeon's tectum might carry directionally coded signals.