J Cogn Neurosci. 1992 Spring;4(2):165-74. doi: 10.1162/jocn.1992.4.2.165.
We investigated the characteristics of saccades made by cats in response to single and double stimuli. Stimuli were either visual, auditory, or bimodal. We initially trained cats to look toward the location of briefly presented single visual or single auditory targets that were extinguished before the initiation of eye movements. Following training, we monitored eye movements during and after the presentation of double targets, either two visual, two auditory, or bimodal, that were at disparate spatial locations. Cats made saccadic eye movements to positions that ranged between the location of the two targets. If the eye position at the start of a saccade was near the mid point of the targets, cats were less likely to initiate a saccade, and saccadic latencies were longer, compared to when starting eye position was at a distance from this location. These behavioral results are consistent with the hypothesis that the neural representations of briefly presented targets are combined and treated as a unitary, low resolution stimulus from which an orienting motor program is derived. The similarity of responses to double visual, double auditory, and bimodal stimuli suggests that a common sensorimotor mechanism applies within and between these sensory modalities.
我们研究了猫对单一和双重刺激做出扫视的特征。刺激可以是视觉、听觉或混合的。我们最初训练猫看向短暂呈现的单一视觉或单一听觉目标的位置，这些目标在眼球运动开始之前就消失了。在训练之后，我们在呈现双目标期间和之后监测眼球运动，双目标可以是两个视觉的、两个听觉的或混合的，位于不同的空间位置。猫会做出扫视眼球运动，将眼球移动到两个目标之间的位置。如果扫视开始时的眼球位置接近目标的中点，那么与眼球位置远离该位置相比，猫不太可能开始扫视，并且扫视潜伏期更长。这些行为结果与以下假设一致，即短暂呈现的目标的神经表示被组合在一起，并被视为一个单一的、低分辨率的刺激，从中可以得出一个定向运动程序。对双视觉、双听觉和混合刺激的反应相似表明，在这些感觉模态内部和之间应用了共同的感觉运动机制。
