Journal
NEUROREPORT
Volume 12, Issue 17, Pages 3859-3863Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200112040-00051
Keywords
beta rhythms; deafferentation; event related (de)synchronization; ischemic nerve block; motor control; passive movement
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After the completion of a voluntary movement, a synchronization of cortical beta rhythms is recorded over the contralateral central region, which is assumed to reflect the termination of the motor command. In order to test this hypothesis, we compared in eight healthy subjects the synchronization of EEG beta rhythms following active and passive index extension. The passive movement was also performed after deafferentation by ischaemic nerve block in three subjects. Beta synchronization was present in all subjects after both active and passive movements, and disappeared under ischaemia in all three subjects. Post-movement beta synchronization can not solely be explained by an idling motor cortex. It may also, at least in part, reflect a movement-related somatosensory processing. NeuroReport 12:3859-3863 (C) 2001 Lippincott Williams & Wilkins.
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