Document Detail

Sensorimotor electroencephalogram rhythmic activity: a functional gate mechanism.
MedLine Citation:
PMID:  7313394     Owner:  NLM     Status:  MEDLINE    
Neurophysiological evidence for a negative feedback loop in somatosensory thalamic nuclei has provided a basis for understanding the origins of rhythmic activity in the electroencephalogram (EEG) of sensorimotor cortex. Studies reviewed here suggest that state-specific activation of this mechanism is responsible both for a variable pattern of rhythmic frequencies during wakefulness and the spindle burst pattern during sleep. It is proposed further that these rhythms index immobility and a common set of physiological changes in sensorimotor function, including reduced excitability in both afferent and efferent pathways. It is hypothesized, therefore, that the closing of a thalamic "inhibitory gate" is indicated by the occurrence of these rhythms. While a greater resolution of specific relationships is necessary, the study of these EEG patterns clearly provides a measure of complex physiological events in the nervous system, and can be also useful in identifying functional abnormalities.
M B Sterman; S S Bowersox
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Sleep     Volume:  4     ISSN:  0161-8105     ISO Abbreviation:  Sleep     Publication Date:  1981  
Date Detail:
Created Date:  1982-02-25     Completed Date:  1982-02-25     Revised Date:  2009-01-29    
Medline Journal Info:
Nlm Unique ID:  7809084     Medline TA:  Sleep     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  408-22     Citation Subset:  IM    
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MeSH Terms
Arousal / physiology
Electroencephalography / methods*
Evoked Potentials, Somatosensory
Motor Cortex / physiology*
Neural Inhibition
Neural Pathways / physiology
Sleep Stages / physiology*
Somatosensory Cortex / physiology*
Thalamus / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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