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Titolo:
Interhemispheric asymmetry of the human motor cortex related to handednessand gender
Autore:
Amunts, K; Jancke, L; Mohlberg, H; Steinmetz, H; Zilles, K;
Indirizzi:
Univ Dusseldorf, C&O Vogt Brain Res Inst, D-40001 Dusseldorf, Germany UnivDusseldorf Dusseldorf Germany D-40001 , D-40001 Dusseldorf, Germany Univ Magdeburg, Inst Psychol, D-39106 Magdeburg, Germany Univ Magdeburg Magdeburg Germany D-39106 hol, D-39106 Magdeburg, Germany Univ Frankfurt, Dept Neurol, D-6000 Frankfurt, Germany Univ Frankfurt Frankfurt Germany D-6000 eurol, D-6000 Frankfurt, Germany Res Ctr Julich, Inst Med, Julich, Germany Res Ctr Julich Julich GermanyRes Ctr Julich, Inst Med, Julich, Germany
Titolo Testata:
NEUROPSYCHOLOGIA
fascicolo: 3, volume: 38, anno: 2000,
pagine: 304 - 312
SICI:
0028-3932(2000)38:3<304:IAOTHM>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON EMISSION TOMOGRAPHY; HUMAN CORPUS-CALLOSUM; HUMAN CEREBRAL-CORTEX; SEX-DIFFERENCES; LEFT-HANDERS; BIOLOGICAL MECHANISMS; QUANTITATIVE-ANALYSIS; FUNCTIONAL MRI; HUMAN BRAIN; BLOOD-FLOW;
Keywords:
lateralization; gender; central sulcus; hand motor skill; MR morphometry;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
73
Recensione:
Indirizzi per estratti:
Indirizzo: Amunts, K Univ Dusseldorf, C&O Vogt Brain Res Inst, Postfach 101007, D-40001 Dusseldorf, Germany Univ Dusseldorf Postfach 101007 Dusseldorf Germany D-40001 many
Citazione:
K. Amunts et al., "Interhemispheric asymmetry of the human motor cortex related to handednessand gender", NEUROPSYCHO, 38(3), 2000, pp. 304-312

Abstract

Most people are right-handed, preferring the right hand for skilled as well as unskilled activities, but a notable proportion are mixed-handed, preferring to use the right hand for some actions and the left hand for others. Assuming a structural/functional correlation in the motor system we tested whether asymmetries in hand performance in consistent right and left handers as well as in mixed handers are associated with anatomical asymmetries inthe motor cortex. In vivo MR morphometry was used for analyzing interhemispheric asymmetry in the depth of the central sulcus in the region of cortical hand representation of 103 healthy subjects. Subjects were tested both for hand preference and hand performance. As expected, left-right differences in hand performance differed significantly between consistent right, consistent left and mixed handers and were independent on gender. Male consistent right handers showed a significant deeper central sulcus on the left hemisphere than on the right. Anatomical asymmetries decreased significantly from male consistent right over mixed to consistent left handers. Sixty two per cent of consistent left handers revealed a deeper central sulcus on theright than on the left hemisphere, but for the group as a whole this rightward asymmetry was not significant. No interhemispheric asymmetry was foundin females. Thus, anatomical asymmetry was associated with handedness onlyin males, but nor in females, suggesting sex differences in the cortical organization of hand movements. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 12:26:53