Stabinite D Iu, Alekseenko S V, Kirvialis D I
Neirofiziologiia. 1984;16(4):505-12.
Spatio-temporal interactions within complex receptive fields were investigated in the visual cortex of a cat by means of sequential presentation of two stationary stimuli. When two stimuli were presented in the phase (on-on or off-off) and sequential presentation corresponded to preferred movement direction, the response to second stimulus was enhanced (or less inhibited). When sequential presentation corresponded to opposite movement direction, the response was inhibited. Sequential presentation of two stimuli with opposite phase (on-off or off-on) in preferred direction inhibited the response to the second stimulus, but in nonpreferred direction the response was enhanced (or less inhibited). The strength of interactions depended on distance between stimuli presented in the receptive field and interstimulus time interval. It is concluded that direction selectivity is provided by asymmetry of spatio-temporal interactions between on-inputs and between off-inputs. Interactions between on- and off-inputs, which occur in case of multiedge stimulus movement may be used by the visual system for detecting an object from visual environment, for estimating object size and relative movement velocity.
通过顺序呈现两个静止刺激，研究了猫视觉皮层中复杂感受野内的时空相互作用。当两个刺激以同相（开-开或关-关）呈现且顺序呈现对应于偏好运动方向时，对第二个刺激的反应增强（或抑制减弱）。当顺序呈现对应于相反运动方向时，反应受到抑制。在偏好方向上顺序呈现两个反相（开-关或关-开）的刺激会抑制对第二个刺激的反应，但在非偏好方向上反应增强（或抑制减弱）。相互作用的强度取决于感受野中呈现的刺激之间的距离和刺激间隔时间。得出的结论是，方向选择性由开输入之间和关输入之间时空相互作用的不对称性提供。在多边缘刺激运动的情况下发生的开输入和关输入之间的相互作用，视觉系统可能会利用它从视觉环境中检测物体、估计物体大小和相对运动速度。
