Vitanova L, Glezer V, Gauselman V
Biol Cybern. 1985;52(4):237-46. doi: 10.1007/BF00336980.
The responses to moving and stationary stimuli of 27 cat's striate cortical units were studied. Two stationary light bars located in different parts of the receptive field were used. The order of presentation and the time-interval between the stimuli varied; so, the presentation of a pair of stationary stimuli was an analogue of a moving stimulus. It was shown that responses occurred in neurons previously unresponsive to stationary stimuli when two stationary stimuli were presented successively in certain order. In the direction-sensitive units an asymmetry of the temporal course of the inhibitory processes was observed. The inhibitory zone located on the side of the preferred direction of movement was characterized by an early inhibitory phase followed by a phase of disinhibition and by a second inhibitory phase. For the inhibitory zone located on the side of the null direction no disinhibitory phase was demonstrated. The significance of the spatial and temporal characteristics of the receptive field for the appearance of responses to movement, the directional sensitivity and the velocity tuning in striate neurons is discussed.
研究了27个猫视皮层神经元对移动和静止刺激的反应。使用了位于感受野不同部位的两个静止光条。刺激的呈现顺序和刺激之间的时间间隔有所变化；因此，一对静止刺激的呈现类似于移动刺激。结果表明，当以特定顺序相继呈现两个静止刺激时，先前对静止刺激无反应的神经元会产生反应。在方向敏感单元中，观察到抑制过程时间进程的不对称性。位于运动偏好方向一侧的抑制区的特征是早期抑制相，随后是去抑制相和第二个抑制相。而位于零方向一侧的抑制区则未表现出去抑制相。文中讨论了感受野的空间和时间特征对于视皮层神经元对运动反应的出现、方向敏感性和速度调谐的意义。
