Relations between the unit activity of the vermis cerebelli and the phasic waves of the electrocerebellogram during sleep in chronic cats

Pellet, J.; Harlay, F.

Archives Italiennes de Biologie 115(2): 108-135


ISSN/ISBN: 0003-9829
PMID: 195548
Accession: 068523615

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In the chronic cat, spontaneous unit activity and the slow phasic waves (SPW) of the electrocerebellogram (ECeG) were derived simultaneously from the dorsal vermian regions of Larsell's lobules V-VI, area of the head and eyes, during slow sleep (SS), paradoxal sleep (PS) and the period of transition (T) between SS and PS. Study of the principal characteristics of the SPW suggested that this transitory component of the ECeG is the corticocerebellar equivalent of the ponto-geniculo-occipital (PGO) waves of sleep. The time relationships between the SPW, recorded by a macroelectrode situated near the microelectrode or observed under the microelectrode, and the discharges of 132 vermian cells were considered during the phasic SS, the T periods and during PS outside of the sequences with important phasic manifestations. The Purkinje (P) cells were identified by the presence of complex spikes (CS) following spontaneous discharges (108 units).