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Titolo:
MOTOR CORTEX AND HAND MOTOR-SKILLS - STRUCTURAL COMPLIANCE IN THE HUMAN BRAIN
Autore:
AMUNTS K; SCHLAUG G; JANCKE L; STEINMETZ H; SCHLEICHER A; DABRINGHAUS A; ZILLES K;
Indirizzi:
UNIV DUSSELDORF,C&O VOGT BRAIN RES INST D-4000 DUSSELDORF GERMANY BETH ISRAEL HOSP,DEPT NEUROL BOSTON MA 02215 HARVARD UNIV,SCH MED BOSTON MA 02215 RES CTR JULICH,INST MED JULICH GERMANY UNIV DUSSELDORF,DEPT NEUROL D-4000 DUSSELDORF GERMANY
Titolo Testata:
Human brain mapping
fascicolo: 3, volume: 5, anno: 1997,
pagine: 206 - 215
SICI:
1065-9471(1997)5:3<206:MCAHM->2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON EMISSION TOMOGRAPHY; LONG-TERM POTENTIATION; CEREBRAL BLOOD-FLOW; CORTICAL REORGANIZATION; MAGNETIC STIMULATION; ADULT-RATS; HANDEDNESS; ANGIOGENESIS; MUSICIANS; ASYMMETRY;
Keywords:
HUMAN MOTOR CORTEX; ASYMMETRY; PLASTICITY; HANDEDNESS; MRI; MUSICIANS; HAND MOTOR SKILL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
62
Recensione:
Indirizzi per estratti:
Citazione:
K. Amunts et al., "MOTOR CORTEX AND HAND MOTOR-SKILLS - STRUCTURAL COMPLIANCE IN THE HUMAN BRAIN", Human brain mapping, 5(3), 1997, pp. 206-215

Abstract

Recent studies in humans and nonhuman primates have shown that the functional organization of the human sensorimotor cortex changes following sensory stimulation or following the acquisition of motor skills. It is unknown whether functional plasticity in response to the acquisition of new motor skills and the continued performance of complicated bimanual movements for years is associated with structural changes in the organization of the motor cortex. Professional musicians, especially keyboard and string players, are a prototypical group for investigating these changes in the human brain. Using magnetic resonance images,we measured the length of the posterior wall of the precentral gyrus bordering She central sulcus (intrasulcal length of the precentral gyrus, ILPG) in horizontal sections through both hemispheres of right-handed keyboard players and of an age- and handedness-matched control group. Lacking a direct in vivo measurement of the primary motor cortex in humans, we assumed that the ILPG is a measure of the size of the primary motor cortex. Left-right asymmetry in the ILPG tvas analyzed and compared between both groups. Whereas controls exhibited a pronounced left-larger-than-right asymmetry, keyboard players had more symmetrical ILPG, The most pronounced differences in ILPG between keyboard players and controls were seen in the most dorsal part of the presumed cortical hand representation of both hemispheres. This was especially truein the nondominant right hemispheres. The size of the ILPG was negatively correlated with age of commencement of musical training in keyboard players, supporting our hypothesis that the human motor cortex can exhibit functionally induced and long-lasting structural adaptations. (C) 1997 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 03:58:16