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| Research article summary (published 2 Oct 2002): |
Somatotopic mapping of the human primary sensorimotor cortex during motor imagery and motor execution by functional magnetic resonance imaging.
Full Abstract
The human primary sensorimotor cortex was investigated for somatotopic organization during motor imagery (IM) which was compared to motor execution (EM). Block designed BOLD (blood oxygen level dependent)-functional magnetic resonance imaging at 1.5 Tesla was applied in 14 right handed volunteers during imagined and executed tongue, finger and toe movements. BOLD-clusters were assessed for anatomically correct sensorimotor localization. Euklidian coordinates, relative signal change and correlation to the applied reference function were determined. Statistical means were calculated. IM recruited somatotopically organized primary sensorimotor representations of the precentral gyrus that reflected the homunculus and overlapped in part with EM representations. Mean BOLD-signals ranged from 1.93 to 3.18% for EM, and from 0.73 to 1.47% for IM. The results support the hypothesis that the primary sensorimotor cortex is active during IM and that IM and EM share common functional circuits.
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Author information
Author/s: Stippich, Christoph (C); Ochmann, Henrik (H); Sartor, Klaus (K);
Affiliation: Department of Neuroradiology, University of Heidelberg Medical School, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany. christoph_stippich(-atsign-)med.uni-heidelberg.de
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Neuroscience letters (Neurosci Lett), published in Ireland. (Language: eng)
Reference: 2002-Oct; vol 331 (issue 1) : pp 50-4
Dates: Created 2002/10/02; Completed 2002/11/20; Revised 2006/11/15;
PMID: 12359321, 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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