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Lateral interactions in the superior colliculus, not an extended fixation zone, can account for the remote distractor effect

Published online by Cambridge University Press:  01 August 1999

E. Olivier ,
M. C. Dorris  and
D. P. Munoz
E. Olivier
Affiliation:
Laboratory of Neurophysiology, School of Medicine, University of Louvain, B-1200 Brussels, Belgiumolivier@nefy.ucl.ac.be
M. C. Dorris
Affiliation:
Medical Research Council Group in Sensory-Motor Neuroscience, Department of Physiology, Queen's University, Kingston, Ontario, Canada K7L 3N6 {mike; doug}@soll.eyeml.queensu.ca brain.phgy.queensu.ca/doug_munoz/dpm.htm
D. P. Munoz
Affiliation:
Medical Research Council Group in Sensory-Motor Neuroscience, Department of Physiology, Queen's University, Kingston, Ontario, Canada K7L 3N6 {mike; doug}@soll.eyeml.queensu.ca brain.phgy.queensu.ca/doug_munoz/dpm.htm
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Abstract

Recordings of neuronal activity in the monkey superior colliculus (SC) suggest that the two apparently independent effects of a visual distractor on both temporal (latency) and spatial (metrics) saccade parameters may be the result of lateral interactions between subpopulations of saccade-related neurons located at different sites on the motor map of the superior colliculus. One subpopulation is activated during the planing and initiation of a saccade; the other is activated by the appearance of a distractor. The inhibitory or facilitative nature of this interaction depends on the distance between the distractor and the target and is consistent with the complex pattern of intrinsic and commissural collicular connections.

Type
Open Peer Commentary
Information
Behavioral and Brain Sciences , Volume 22 , Issue 4 , August 1999 , pp. 694 - 695
Copyright
© 1999 Cambridge University Press

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