CENTRIFUGAL DIRECTIONAL BIAS IN THE MIDDLE TEMPORAL VISUAL AREA (MT) OF THE MACAQUE
CENTRIFUGAL DIRECTIONAL BIAS IN THE MIDDLE TEMPORAL VISUAL AREA (MT) OF THE MACAQUE
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DOI：
10.1017/s0952523800012037
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发表时间：
1989-01-01
影响因子：
1.9
通讯作者：
ALBRIGHT, TD
中科院分区：
文献类型：
--
作者：
ALBRIGHT, TD
我们研究了猕猴中颞叶视区（MT）神经元运动的首选方向的分布。我们发现一个显着的各向异性有利于方向，是面向远离中心的凝视。这种各向异性只存在于外周感受野的神经元中。这种外围离心方向性偏差很好地对应于光流场的运动特性的偏置分布，光流场是由向前运动期间视觉世界的位移产生的。这种偏差可能有助于处理这种常见形式的视觉刺激，并可能成为先前观察到的有利于离心运动的知觉各向异性的基础。我们认为，这种偏见可能是由于暴露于一种自然发生的选择性视觉体验形式的可修改的皮层电路。
We have examined the distribution of preferred directions of motion for neurons in the middle temporal visual area (MT) of the macaque. We found a marked anisotropy favoring directions that are oriented away from the center of gaze. This anisotropy is present only among neurons with peripherally located receptive fields. This peripheral centrifugal directionality bias corresponds well to the biased distribution of motions characteristic of optic flow fields, which are generated by displacement of the visual world during forward locomotion. The bias may facilitate the processing of this common form of visual stimulation and could underlie previously observed perceptual anisotropies favoring centrifugal motion. We suggest that the bias could arise from exposure of modifiable cortical circuitry to a naturally occurring form of selective visual experience.