Before saccadic eye movements, our perception of the saccade targets is enhanced. Changes in the visual representation of saccade targets, which presumably underlie this perceptual benefit, emerge even before the eye begins to move. This perisaccadic enhancement has been shown to involve changes in the response magnitude, selectivity, and reliability of visual neurons. In this study, we quantified multiple aspects of perisaccadic changes in the neural response, including gain, feature tuning, contrast response function, reliability, and correlated activity between neurons. We then assessed the contributions of these various perisaccadic modulations to the population's enhanced perisaccadic representation of saccade targets. We found a partial dissociation between the motor information, carried entirely by gain changes, and visual information, which depended on all three types of modulation. These findings expand our understanding of the perisaccadic enhancement of visual representations and further support the existence of multiple sources of motor modulation and visual enhancement within extrastriate visual cortex.

在扫视眼球运动之前，我们对扫视目标的感知得到了增强。眼跳目标的视觉表现的变化，可能是这种感知益处的基础，甚至在眼睛开始移动之前就出现了。这种 perisaccadic 增强已被证明涉及视觉神经元的响应幅度、选择性和可靠性的变化。在这项研究中，我们量化了神经反应中 perisaccadic 变化的多个方面，包括增益、特征调整、对比反应函数、可靠性和神经元之间的相关活动。然后，我们评估了这些不同的 perisaccadic 调制对人群增强的 saccade 目标的 perisaccadic 表示的贡献。我们发现完全由增益变化携带的运动信息和视觉信息之间存在部分分离，这取决于所有三种类型的调制。这些发现扩展了我们对视觉表征的 perisaccadic 增强的理解，并进一步支持在纹外视觉皮层内存在多种运动调节和视觉增强来源。