Endo K, Haranaka Y, Shein W N, Adams D L, Kusunoki M, Sakata H
Department of Ophthalmology, Surugadai Hospital of Nihon University, Tokyo, Japan.
Nippon Ganka Gakkai Zasshi. 2000 May;104(5):334-43.
To specify the cues for the discrimination of orientation in depth in axis orientation selective (AOS) neurons.
We analyzed the responses of AOS neurons in the monkey caudal intraparietal sulcus (cIPS) region using binocular disparity stimuli generated by stereoscopic 3 D computer graphics.
Most AOS neurons (20/27) were sensitive to binocular disparity and showed tuning to the orientation of a slit in the sagittal plane with orientation disparity cues. For 12 neurons we also used an array of discs or dots instead of slits to eliminate orientation disparity. Half of the neurons (6/12) responded better to the slits than to the discs or dots, suggesting that they were sensitive to orientation disparity. Five neurons (5/12) responded equally well to the discs or dots suggesting that they were more sensitive to the gradient of horizontal disparity than to the orientation disparity.
Both orientation disparity and disparity gradient were likely to be integrated in the cIPS area to represent axis orientation of an object in space.
明确轴取向选择性（AOS）神经元中深度取向辨别线索。
我们使用立体3D计算机图形生成的双眼视差刺激，分析了猴尾侧顶内沟（cIPS）区域AOS神经元的反应。
大多数AOS神经元（20/27）对双眼视差敏感，并表现出对具有取向视差线索的矢状面狭缝取向的调谐。对于12个神经元，我们还使用圆盘或点阵列代替狭缝以消除取向视差。一半的神经元（6/12）对狭缝的反应比对圆盘或点的反应更好，表明它们对取向视差敏感。五个神经元（5/12）对圆盘或点的反应同样良好，表明它们对水平视差梯度比对取向视差更敏感。
取向视差和视差梯度可能都在cIPS区域整合，以表示空间中物体的轴取向。
