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

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Pubblicato in:Experimental Brain Research vol. 215, no. 1 (Nov 2011), p. 13
Autore principale: Ray, Supriya
Altri autori: Bhutani, Neha, Kapoor, Vishal, Murthy, Aditya
Pubblicazione:
Springer Nature B.V.
Soggetti:
Anticipation, Psychological > physiology
Eye Movements > physiology
Humans
Photic Stimulation > methods
Psychomotor Performance > physiology
Reaction Time > physiology
Saccades > physiology
Visual Perception > physiology
Information processing
Hypotheses
Brain research
Planning
Visual processing
Perceptions
Brain
Information
Cognition
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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.[PUBLICATION 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.
ISSN:0014-4819
1432-1106
DOI:10.1007/s00221-011-2866-x
Fonte:Health & Medical Collection