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The Journal of Neurophysiology Vol. 84 No. 2 August 2000, pp. 1103-1106
Copyright ©2000 by the American Physiological Society
RAPID COMMUNICATION
Department of Cell and Developmental Biology and the Program in Neuroscience, SUNY Upstate Medical University, Syracuse, New York 13210
Tu, Tyson A. and
E. Gregory Keating.
Electrical Stimulation of the Frontal Eye Field in a Monkey
Produces Combined Eye and Head Movements. J. Neurophysiol. 84: 1103-1106, 2000. The frontal eye field (FEF),
an area in the primate frontal lobe, has long been considered important
for the production of eye movements. Past studies have evoked
saccade-like movements from the FEF using electrical stimulation in
animals that were not allowed to move their heads. Using electrical
stimulation in two monkeys that were free to move their heads, we have
found that the FEF produces gaze shifts that are composed of both eye and head movements. Repeated stimulation at a site evoked gaze shifts
of roughly constant amplitude. However, that gaze shift could be
accomplished with varied amounts of head and eye movements, depending
on their (head and eye) respective starting positions. This evidence
suggests that the FEF controls visually orienting movements using both
eye and head rotations rather than just shifting the eyes as previously thought.
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