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1 Vanderbilt University
2 INSERM
3 Vanderbilt Univ.
* To whom correspondence should be addressed. E-mail: jeffrey.d.schall{at}vanderbilt.edu.
Numerous studies have described different functional cell types in the frontal eye field (FEF), but the reliability of the distinction between these types has been uncertain. Studies in other brain areas have described specific differences in the width of action potentials recorded from different cell types. To substantiate the functionally-defined cell types encountered in FEF, we measured the width of spikes of visual, movement and visuomovement types of FEF neurons in macaque monkeys. We show that visuomovement neurons had the thinnest spikes, consistent with a role in local processing. Movement neurons had the widest spikes, consistent with their role in sending eye movement commands to subcortical structures such as the superior colliculus. Visual neurons had wider spikes than visuomovement neurons, consistent with their role in receiving projections from occipital and parietal cortex. These results show how structure and function of FEF can be linked to guide inferences about neuronal architecture.
This article has been cited by other articles:
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  J. Y. Cohen, R. P. Heitz, J. D. Schall, and G. F. Woodman On the Origin of Event-Related Potentials Indexing Covert Attentional Selection During Visual Search J Neurophysiol, October 1, 2009; 102(4): 2375 - 2386. [Abstract] [Full Text] [PDF]
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A. Murthy, S. Ray, S. M. Shorter, J. D. Schall, and K. G. Thompson Neural Control of Visual Search by Frontal Eye Field: Effects of Unexpected Target Displacement on Visual Selection and Saccade Preparation J Neurophysiol, May 1, 2009; 101(5): 2485 - 2506. [Abstract] [Full Text] [PDF]
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