| Electrocorticogram-electromyogram coherence during isometric contraction of hand muscle in human. | |
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MedLine Citation:
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PMID: 11068237 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To clarify how the primary sensorimotor and supplementary motor areas are involved in the generation of the rhythmicity of electromyogram (EMG) activity during continuous muscle contraction. METHOD: We analyzed the coherence between subdurally recorded cortical electroencephalograms (EEG) and EMGs of the contralateral wrist extensor muscle during continuous isometric contraction in 8 patients with medically intractable epilepsy. RESULTS: In all subjects, a significant coherence between the primary motor area (M1) and EMG was observed at the peak frequency of 15+/-3 Hz (means+/-SD). In the primary somatosensory area (S1) of 7 subjects and the supplementary motor area proper (SMA proper) of 4 subjects, significant coherence with EMG was observed at 12+/-5 and 15+/-4 Hz, respectively. The time lags revealed by cross-correlogram were 10+/-3, 7+/-1 and 22+/-8 ms in the M1, S1 and SMA proper, respectively, with the EMG lagging in all areas. CONCLUSION: These findings suggest that the rhythmic activity in the SMA proper, as well as in the S1 and M1, is related to the generation of the rhythmicity of EMG activity. |
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Authors:
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S Ohara; T Nagamine; A Ikeda; T Kunieda; R Matsumoto; W Taki; N Hashimoto; K Baba; T Mihara; S Salenius; H Shibasaki |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: 111 ISSN: 1388-2457 ISO Abbreviation: Clin Neurophysiol Publication Date: 2000 Nov |
Date Detail:
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Created Date: 2000-12-15 Completed Date: 2001-01-11 Revised Date: 2008-09-10 |
Medline Journal Info:
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Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 2014-24 Citation Subset: IM |
Affiliation:
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Department of Brain Pathophysiology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, 606-8507, Kyoto, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Electromyography Epilepsy / physiopathology* Female Humans Isometric Contraction / physiology* Male Motor Cortex / physiopathology* Time Factors |
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