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Cerebral Cortex Advance Access published online on April 18, 2008
Cerebral Cortex, doi:10.1093/cercor/bhn050
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© 2008 The Authors
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

An Additional Motor-Related Field in the Lateral Frontal Cortex of Squirrel Monkeys

Numa Dancause1, Vanja Duric2, Scott Barbay3,4,5, Shawn B. Frost3,4,5, Antonis Stylianou5 and Randolph J. Nudo3,4,5

1 Department of Neurology, University of Rochester Medical Center, 601 Elmwood Ave, Box 673, Rochester, NY 14642, USA, 2 Department of Psychiatry, Yale University School of Medicine, 34 Park Street, Room S304, New Haven, CT 06519, USA, 3 Department of Molecular and Integrative Physiology, 4 Kansas Intellectual and Developmental Disabilities Research, 5 Landon Center on Aging, Kansas University Medical Center, 3901 Rainbow Blvd., Kansas City, KS 66160, USA

Address correspondence to Numa Dancause, P.T., Ph.D., Department of Neurology, University of Rochester Medical Center, 601 Elmwood Ave, Box 673, Rochester, NY 14642, USA. Email: Numa_Dancause{at}urmc.rochester.edu.

Our earlier efforts to document the cortical connections of the ventral premotor cortex (PMv) revealed dense connections with a field rostral and lateral to PMv, an area we called the frontal rostral field (FR). Here, we present data collected in FR using electrophysiological and anatomical methods. Results show that FR contains an isolated motor representation of the forelimb that can be differentiated from PMv based on current thresholds and latencies to evoke electromyographic activity using intracortical microstimulation techniques. In addition, FR has a different pattern of cortical connections compared with PMv. Together, these data support that FR is an additional, previously undescribed motor-related area in squirrel monkeys.

Key Words: frontal lateral cortex • frontal rostral area • intracortical microstimulation, motor control • neuroanatomy • ventral premotor cortex


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