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Exp Brain Res. 2011 Nov;215(1):13-25. doi: 10.1007/s00221-011-2866-x. Epub 2011 Sep 20.

Trans-saccadic processing of visual and motor planning during sequential eye movements.

Author information

1
National Brain Research Centre, Near NSG Campus, Nainwal More, Manesar 122050, Haryana, India.

Abstract

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.

PMID:
21931983
DOI:
10.1007/s00221-011-2866-x
[Indexed for MEDLINE]

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