Chelazzi L, Biscaldi M, Corbetta M, Peru A, Tassinari G, Berlucchi G
Dipartimento di Scienze Neurologiche e della Visione, Università di Verona, Italy.
Behav Brain Res. 1995 Nov;71(1-2):81-8. doi: 10.1016/0166-4328(95)00134-4.
Subjects made a horizontal or vertical saccade in response to a non-lateralized auditory stimulus. Simple manual reaction time (RT) for the detection of light targets at extrafoveal locations was modulated by the intention to make the saccade insofar as RT to targets presented at the saccadic goal location or in the hemifield containing that location was faster than RT to targets presented at the opposite, mirror-symmetric location. This RT difference was maximal prior to the beginning of the saccade and vanished after saccade termination, indicating that the effect was caused by the neural activity leading to the saccade rather than to the eye movement or the eye position per se. The results have implications for the understanding of the relations between visual spatial attention and oculomotor control, especially with regard to inhibitory phenomena arising from the non-correspondence between the line of sight and the focus of attention.
受试者对非侧向听觉刺激做出水平或垂直扫视。在检测中央凹外位置的轻目标时，简单手动反应时间（RT）会受到做出扫视意图的调节，即对出现在扫视目标位置或包含该位置的半视野中的目标的反应时间，比对出现在相反的镜像对称位置的目标的反应时间要快。这种反应时间差异在扫视开始前最大，扫视终止后消失，这表明该效应是由导致扫视的神经活动引起的，而不是由眼球运动或眼球位置本身引起的。这些结果对于理解视觉空间注意力与眼动控制之间的关系具有启示意义，特别是对于因视线与注意力焦点不对应而产生的抑制现象而言。
