An additional motor-related field in the lateral frontal cortex of squirrel monkeys.
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.
Dancause
Numa
N
Department of Neurology, University of Rochester Medical Center, 601 Elmwood Ave, Box 673, Rochester, NY 14642, USA. Numa_Dancause@urmc.rochester.edu
Duric
Vanja
V
Barbay
Scott
S
Frost
Shawn B
SB
Stylianou
Antonis
A
Nudo
Randolph J
RJ
D000818:Animals; D001132:Arm / Q000294:innervation / Q000502:physiology; D001931:Brain Mapping; D004558:Electric Stimulation; D004576:Electromyography; D005071:Evoked Potentials / Q000502:physiology; D005625:Frontal Lobe / Q000033:anatomy & histology* / Q000502:physiology*; D008297:Male; D008839:Microelectrodes; D009043:Motor Activity / Q000502:physiology*; D011930:Reaction Time; D012453:Saimiri / Q000033:anatomy & histology*; D013116:Spinal Cord / Q000033:anatomy & histology