Barbiturate spindle activity in the thalamic lateral ventro-posterior nucleus and the second somato-sensory area of the cortex.

Brain Research
T Ganes

Abstract

(1) Barbiturate spindles recorded from the second somato-sensory cortical area (SII) were similar to spindles in the primary somato-sensory area (SI) both with respect to incidence, duration of each spindle and per cent spindle time. The spindle wave amplitude was smaller in SII. The highest spindle wave amplitude was observed in the anterior part of SII which receives input from nucleus ventralis postero-lateralis (VPL). No spindle activity was observed in the posterior part of SII which receives input from the posterior nuclear group (PO) of the thalamus. (2) Barbiturate spindles recorded from a locus in VPL and its projection area in SII were cross-correlated. The analysis resulted in high cross-correlation factors, indicating that a considerable degree of spindle wave synchrony existed between the spindles. This wave synchrony was reduced by moving the cortical electrode a short distance. (3) Cortical spindles recorded from corresponding sites in SI and SII were cross-correlated, and gave a high cross-correlation coefficient. This synchrony was markedly reduced if one of the electrodes was moved a few millimetres away from the optimal point. (4) Spindles started simultaneously in corresponding sites of SI and SII. A high de...Continue Reading

Citations

Dec 1, 1980·Electroencephalography and Clinical Neurophysiology·J E Jordan, S T Grice
Oct 1, 1994·Anaesthesia·M H LauwersF Camu
Mar 1, 1984·Anaesthesia·J A Robertson

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