Publication Date:
1991-03-15
Description:
The superior colliculus contains neurons that cause displacements of the visual axis (gaze shifts). These cells are arranged topographically in a motor map on which the vector (amplitude and direction) of the coded movement varies continuously with location. How this spatial representation becomes a temporal code (frequency and duration) in the motoneurons is unknown. During a gaze shift, a zone of neural activity moved continuously on the map from an initial location, defining the vector of the desired gaze shift, to a final "zero" position containing neurons that were active during fixation. Thus, the spatial-temporal transformation may be accomplished by control of gaze throughout the spatial trajectory of activity on the motor map.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Munoz, D P -- Pelisson, D -- Guitton, D -- New York, N.Y. -- Science. 1991 Mar 15;251(4999):1358-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2003221" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Cats
;
*Eye Movements
;
Oculomotor Muscles/innervation/physiology
;
Superior Colliculi/*physiology
;
Visual Perception/physiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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