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J Neurophysiol (May 11, 2005). doi:10.1152/jn.00109.2005
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00109.2005v1
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Submitted on January 31, 2005
Accepted on April 19, 2005

Trajectory interpretation by supplementary eye field neurons during ocular baseball

Yong-Guk Kim, Jeremy B Badler, and Stephen J Heinen*

* To whom correspondence should be addressed. E-mail: heinen{at}ski.org.

Good performance in the sport of baseball demonstrates that humans can determine the trajectory of a moving object and act on it under the constraint of a rule. We report here on neuronal activity in the supplementary eye field (SEF) of monkeys performing an eye movement task inspired by baseball. In ocular baseball, a pursuit eye movement to a target is executed or withheld based upon the target's trajectory. We found that a subset of neurons in the SEF interpreted the trajectory according to the task rule. Other neurons specified at a later time the command to pursue the target with the eyes. The results suggest that the SEF can interpret sensory signals about target motion in the context of a rule to guide voluntary eye movement initiation.




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