Barbiturate spindle activity in functionally corresponding thalamic and cortical somato-sensory areas in the cat.

Brain Research
T Ganes, P Andersen

Abstract

(1) Spontaneous barbiturate spindles were recorded from a locus in the thalamic nucleus ventralis postero-lateralis (VPL) and the corresponding projection area in the somato-sensory cortex (SI) in the cat. (2) Type I spindles32 recorded from such sites in the thalamus and cortex, regarded as being functionally on line, were cross-correlated. The analysis gave high negative cross-correlation coefficients, indicating that a considerable degree of wave synchrony existed between the spindles. Maximal wave synchrony was present in the first and middle part of the spindle. (3) The thalamo-cortical spindle wave synchrony was reduced by a small displacement of the cortical electrode within the somato-sensory cortex. Starting with a very lightly anaesthetized animal, small amounts of barbiturate did not influence the size of the cortical area which had spindles in synchrony with the thalamic spindles. (4) Spindles recorded from a VPL locus and from its cortical projection site started simultaneously. When the thalamic and cortical electrodes were positioned functionally off line this spindle coincidence decreased. The intervals between the spindle onsets increased with increasing off line positions of the electrodes. Those few thalamic ...Continue Reading

References

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Citations

Dec 1, 1980·Electroencephalography and Clinical Neurophysiology·J E Jordan, S T Grice
Aug 1, 1978·Experimental Neurology·J E JordanS T Grice
Apr 30, 2010·Journal of Neurophysiology·Nima DehghaniEric Halgren
May 18, 2016·Neural Plasticity·Brittany C ClawsonSara J Aton
Feb 4, 2021·Biological Reviews of the Cambridge Philosophical Society·Ivaylo Borislavov Iotchev, Eniko Kubinyi

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