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| Research article summary (published 21 Jan 2002): |
Early consolidation in human primary motor cortex.
Full Abstract
Behavioural studies indicate that a newly acquired motor skill is rapidly consolidated from an initially unstable state to a more stable state, whereas neuroimaging studies demonstrate that the brain engages new regions for performance of the task as a result of this consolidation. However, it is not known where a new skill is retained and processed before it is firmly consolidated. Some early aspects of motor skill acquisition involve the primary motor cortex (M1), but the nature of that involvement is unclear. We tested the possibility that the human M1 is essential to early motor consolidation. We monitored changes in elementary motor behaviour while subjects practised fast finger movements that rapidly improved in movement acceleration and muscle force generation. Here we show that low-frequency, repetitive transcranial magnetic stimulation of M1 but not other brain areas specifically disrupted the retention of the behavioural improvement, but did not affect basal motor behaviour, task performance, motor learning by subsequent practice, or recall of the newly acquired motor skill. These findings indicate that the human M1 is specifically engaged during the early stage of motor consolidation.
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Author information
Author/s: Muellbacher, Wolf (W); Ziemann, Ulf (U); Wissel, Joerg (J); Dang, Nguyet (N); Kofler, Markus (M); Facchini, Stefano (S); Boroojerdi, Babak (B); Poewe, Werner (W); Hallett, Mark (M);
Affiliation: Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bldg 10, Rm 5N226, 10 Center Drive MSC 1428, Bethesda, Maryland 20892-1428, USA.
Journal and publication information
Publication Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't
Journal: Nature (Nature), published in England. (Language: eng)
Reference: 2002-Feb; vol 415 (issue 6872) : pp 640-4
Dates: Created 2002/02/08; Completed 2002/03/13; Revised 2006/11/15;
PMID: 11807497, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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