Journal
JOURNAL OF NEUROSCIENCE
Volume 27, Issue 50, Pages 13750-13755Publisher
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.2693-07.2007
Keywords
saccadic eye movement; reward amount; directional bias; motivation; monkey; neural activity
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Several areas of the macaque brain are known to be related to the reward during the performance of saccadic eye-movement tasks. Neurons in the supplementary eye field (SEF) have been reported to be involved in the prediction and detection of a reward. We describe a group of neurons in the SEF that became active during the period of reward delivery after saccades toward a specific direction, but showed weaker activity in other directions, although the same amount of reward was given in each direction. Moreover, this directional reward activity was modulated by the reward size. Our results demonstrate that the SEF cells may reflect both reward amount and target positions toward which a movement was rewarded, and suggest that they may play an important role in providing information about the value of each saccade according to the spatial target location.
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