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J Neurophysiol 84: 1369-1384, 2000;
0022-3077/00 $5.00
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The Journal of Neurophysiology Vol. 84 No. 3 September 2000, pp. 1369-1384
Copyright ©2000 by the American Physiological Society

Neuronal Activity in Macaque Supplementary Eye Field During Planning of Saccades in Response to Pattern and Spatial Cues

Carl R. Olson,1,2 Sonya N. Gettner,1 Valérie Ventura,3 Roberto Carta,3 and Robert E. Kass1,3

 1Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh 15213-2683;  2Department of Neuroscience, University of Pittsburgh, Pittsburgh 15260; and  3Department of Statistics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213

Olson, Carl R., Sonya N. Gettner, Valérie Ventura, Roberto Carta, and Robert E. Kass. Neuronal Activity in Macaque Supplementary Eye Field During Planning of Saccades in Response to Pattern and Spatial Cues. J. Neurophysiol. 84: 1369-1384, 2000. The aim of this study was to determine whether neuronal activity in the macaque supplementary eye field (SEF) is influenced by the rule used for saccadic target selection. Two monkeys were trained to perform a variant of the memory-guided saccade task in which any of four visible dots (rightward, upward, leftward, and downward) could be the target. On each trial, the cue identifying the target was either a spot flashed in superimposition on the target (spatial condition) or a foveally presented digitized image associated with the target (pattern condition). Trials conforming to the two conditions were interleaved randomly. On recording from 439 SEF neurons, we found that two aspects of neuronal activity were influenced by the nature of the cue. 1) Activity reflecting the direction of the impending response developed more rapidly following spatial than following pattern cues. 2) Activity throughout the delay period tended to be higher following pattern than following spatial cues. We consider these findings in relation to the possible involvement of the SEF in processes underlying attention, arousal, response-selection, and motor preparation.




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