National Brain Research Centre, Near NSG Campus, Nainwal More, Manesar 122050, Haryana, India.
Exp Brain Res. 2011 Nov;215(1):13-25. doi: 10.1007/s00221-011-2866-x. Epub 2011 Sep 20.
How the brain maintains perceptual continuity across eye movements that yield discontinuous snapshots of the world is still poorly understood. In this study, we adapted a framework from the dual-task paradigm, well suited to reveal bottlenecks in mental processing, to study how information is processed across sequential saccades. The pattern of RTs allowed us to distinguish among three forms of trans-saccadic processing (no trans-saccadic processing, trans-saccadic visual processing and trans-saccadic visual processing and saccade planning models). Using a cued double-step saccade task, we show that even though saccade execution is a processing bottleneck, limiting access to incoming visual information, partial visual and motor processing that occur prior to saccade execution is used to guide the next eye movement. These results provide insights into how the oculomotor system is designed to process information across multiple fixations that occur during natural scanning.
大脑如何在导致世界不连续快照的眼球运动中保持知觉连续性，目前仍知之甚少。在这项研究中，我们改编了双任务范式中的一个框架，该框架非常适合揭示心理加工中的瓶颈，以研究信息如何在连续的眼跳中进行处理。反应时的模式使我们能够区分三种眼跳间加工形式（无眼跳间加工、眼跳间视觉加工和眼跳间视觉加工和眼跳计划模型）。使用提示双步眼跳任务，我们表明，尽管眼跳执行是一个处理瓶颈，限制了传入视觉信息的获取，但在眼跳执行之前发生的部分视觉和运动加工被用来引导下一次眼动。这些结果提供了关于眼球运动系统如何设计用于处理自然扫视过程中多次注视期间的信息的见解。
