VISUAL PROPERTIES OF NEURONS IN A POLYSENSORY AREA IN SUPERIOR TEMPORAL SULCUS OF THE MACAQUE
VISUAL PROPERTIES OF NEURONS IN A POLYSENSORY AREA IN SUPERIOR TEMPORAL SULCUS OF THE MACAQUE
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DOI：
10.1152/jn.1981.46.2.369
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发表时间：
1981-01-01
影响因子：
2.5
通讯作者：
GROSS, CG
中科院分区：
文献类型：
--
作者：
BRUCE, C;DESIMONE, R;GROSS, CG
从颞上沟前部的背侧岸和底部记录了单个神经元，该区域被称为颞上多感觉区（STP）。在麻醉（一氧化二氮）和制动条件下，对5只猕猴（食蟹猴、恒河猴）进行了多次记录研究。几乎所有神经元都对视觉有反应，超过一半的神经元对一种以上的感觉模式有反应；21%对视觉和听觉刺激有反应，17%对视觉和躯体感觉刺激有反应，17%为三模态，41%仅对视觉有反应。几乎所有视觉感受野都延伸到两个半视野，大多数接近猴子的视野大小，包括两个单眼新月区。躯体感觉感受野也是双侧的，通常包括大部分体表。几乎所有神经元对移动的视觉刺激的反应比对静止的视觉刺激的反应更好，并且几乎一半的神经元对运动方向敏感。发现了几类方向选择性神经元，包括：在其整个感受野内对单一运动方向有选择性的神经元；对注视中心呈放射状对称的运动方向有选择性的神经元；以及对深度运动有选择性的神经元。大多数神经元（70%）对刺激的大小、形状、方向或对比度几乎没有或完全没有偏好。少数（30%）对特定刺激反应最佳。其中一些似乎对面部有选择性。大多数STP神经元的特性，如大感受野、对运动敏感、对形状不敏感以及多模态反应性，表明STP更多地参与定向和空间功能，而非模式识别。
Single neurons were recorded from in the dorsal bank and fundus of the anterior portion of the superior temporal sulcus, an area termed the superior temporal polysensory area (STP). Five macaques [Macaca fascicularis, M. mulatta] were studied under anesthesia (N2O) and immobilization in repeated recording sessions. Almost all of the neurons were visually responsive, and over half responded to more than 1 sensory modality; 21% responded to visual and auditory stimuli, 17% responded to visual and somesthetic stimuli, 17% were trimodal and 41% were exlusively visual. Almost all the visual receptive fields extended into both visual half-fields, and the majority approached the size of the visual field of the monkey, including both monocular crescents. Somesthetic receptive fields were also bilateral and usually included most of the body surface. Virtually all neurons responded better to moving visual stimuli than to stationary visual stimuli, and almost half were sensitive to the direction of movement. Several classes of directional neurons were found, including: neurons selective for a single direction of movement throughout their receptive field; neurons selective for directions of movement radially symmetric about the center of gaze; and neurons selective for movement in depth. The majority of neurons (70%) had little or no preference for stimulus size, shape, orientation or contrast. The minority (30%) responded best to particular stimuli. Some of these appeared to be selective for faces. The properties of most STP neurons, such as large receptive fields, sensitivity to movement, insensitivity to form, and polymodal responsiveness, suggest that STP is more involved in orientation and spatial functions than in pattern recognition.