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Wiley Free PMC Article

J Physiol. 1985 Nov;368:611-25. doi: 10.1113/jphysiol.1985.sp015879.

Responses of precentral cells during cooling of post-central cortex in conscious monkeys.

The Journal of physiology

J Brinkman, J G Colebatch, R Porter, D H York

PMID: 4078751 PMCID: PMC1192618 DOI: 10.1113/jphysiol.1985.sp015879
Free PMC Article

Abstract

A cooling plate was implanted over the forelimb representation in area 2 of the post-central region of cerebral cortex in two monkeys. Recordings were made of the discharges of thirty-seven movement-related neurones (thirty-four precentral and three post-central) in the forelimb motor representation of the cerebral cortex during active and passively imposed limb movements before, during and after cooling area 2 and local surrounding regions. Perfusion of the cooling plate with ice-cooled water for 3-5 min caused marked clumsiness of the conscious animal's forelimb movement and anaesthesia of the contralateral hand. Cooling of area 2 did not reduce the responses of area 4 cells to passive joint movements, nor did it alter the over-all pattern of activity of these cells during self-initiated lever pulling while that could still be performed. Cooling of area 2 did cause a significant increase in background cellular discharge in area 4 while the animal was at rest. Afferent impulses which are generated by passive joint movement and which have been shown to influence cells in area 4 of the conscious monkey at short latencies are probably not transmitted through cortico-cortical connexions from area 2.

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