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Unit activity related to spontaneous saccades in frontal dorsomedial cortex of monkey

✍ Scribed by J. Schlag; M. Schlag-Rey

Publisher: Springer-Verlag
Year: 1985
Tongue: English
Weight: 256 KB
Volume: 58
Category: Article
ISSN: 0014-4819
DOI: 10.1007/bf00238971

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✦ Synopsis

Single unit activity was studied in the dorsomedial edge of the frontal lobe, above the superior arcuate sulcus in three trained monkeys (Macaca nemestrina). Gaze and head movements were recorded with two magnetic search coils. Discharges preceding spontaneous eye movements in a preferred direction were consistently observed in light and in dark, in a limited cortical territory at the anterior border of the supplementary motor area. Microstimulation at these sites elicited saccades in the unit preferred direction. Five presaccadic units were studied head fixed and head free and showed the same saccade-related activity under both conditions. Preliminary data suggest that the area studied may be a supplementary eye field distinct from the arcuate frontal eye field.

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