LOCAL FIELD POTENTIAL OSCILLATIONS IN PRIMATE CEREBELLAR CORTEX DURING VOLUNTARY MOVEMENT. Jean-Pierre Pellerin and Yves Lamarre. Centre de Recherche en Sciences Neurologiques, D‚partement de Physiologie, Pavillon Paul-G Desmarais, Universit‚ de Montr‚al, 2960 Chemin de la Tour, C.P. 6128, Succursale Centre-Ville, Montr‚al, Canada, H3C 3J7.
APStracts 4:216N, 1997.
ABSTRACT
Sustained oscillations of 13-18 Hz were observed in local field potentials (LFPs) in the cerebellar cortex of a behaving monkey. These oscillations which appeared to be generated in the granular cell layer were particularly prominent in the paramedian lobule. The oscillatory activity decreased during drowsiness or extreme arousal and occurred most often when the animal was immobile but alert. In a task requiring the animal to move the arm about 1 s after an auditory cue, the oscillations stopped some 150-200 ms after the cue, resumed 200-300 ms later and stopped again 50-100 ms before movement onset. This modulation pattern was observed with consistency only when the animal responded reliably to the auditory cue. The results suggest that the cerebellum could be involved in some higher level of integration particularly during complex sensorimotor behavior. 

Received  1996; accepted in final form  1997.
APS Manuscript Number J312-7.
Article publication pending J. Neurophysiol.
ISSN 1080-4757 Copyright 1997 The American Physiological Society.
Published in APStracts on 5 September 1997