Rodman H R, Albright T D
Psychology Department, Princeton University, NJ 08544.
Vision Res. 1987;27(12):2035-48. doi: 10.1016/0042-6989(87)90118-0.
We have studied the interaction of the direction and speed selectivities of neurons in cortical visual area MT of the macaque monkey. For a given cell, preferred direction and the shape of the direction tuning curve for moving edges were similar at different stimulus speeds, and deviations from the optimal speed did not systematically alter direction tuning bandwidth. Similar speed tuning was obtained for responses to motion in the preferred and anti-preferred directions even when the response to anti-preferred motion was an inhibitory one. The results are discussed in terms of the unique contributions of area MT to visual motion analysis.
我们研究了猕猴视皮层MT区神经元的方向选择性和速度选择性之间的相互作用。对于给定的细胞，在不同刺激速度下，移动边缘的偏好方向和方向调谐曲线的形状相似，偏离最佳速度并不会系统性地改变方向调谐带宽。即使对反偏好方向运动的反应是抑制性的，对偏好方向和反偏好方向运动的反应也获得了相似的速度调谐。我们从MT区对视觉运动分析的独特贡献方面对这些结果进行了讨论。
