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Titolo:
Limb apraxia: Cortical or subcortical
Autore:
Leiguarda, R;
Indirizzi:
FLENI, Raul Carrea Int Neurol Res, RA-1428 Buenos Aires, DF, Argentina FLENI Buenos Aires DF Argentina RA-1428 -1428 Buenos Aires, DF, Argentina
Titolo Testata:
NEUROIMAGE
fascicolo: 1, volume: 14, anno: 2001,
parte:, 2 supplemento:, S
pagine: S137 - S141
SICI:
1053-8119(200107)14:1<S137:LACOS>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROGRESSIVE SUPRANUCLEAR PALSY; MULTIPLE SYSTEM ATROPHY; BASAL GANGLIA; PARKINSONS-DISEASE; IDEOMOTOR APRAXIA; GLOBUS-PALLIDUS; RIGHT-HEMISPHERE; ARM MOVEMENTS; MONKEY; ORGANIZATION;
Keywords:
ideomotor apraxia; clinicoanatomical correlations; basal ganglia;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Leiguarda, R FLENI, Raul Carrea Int Neurol Res, Montaneses 2325, RA-1428 Buenos Aires, DF, Argentina FLENI Montaneses 2325 Buenos Aires DF Argentina RA-1428 ntina
Citazione:
R. Leiguarda, "Limb apraxia: Cortical or subcortical", NEUROIMAGE, 14(1), 2001, pp. S137-S141

Abstract

Ideomotor apraxia is defined as a disturbance in timing, sequencing, and spatial organization of gestural movements. Left hemisphere motor dominance reflected by ideomotor apraxia mainly refers to spatially and temporally complex movements performed outside the natural context. While clinicoanatomical studies have failed to unveil a specific lesion correlating with apraxia, white matter damage-interrupting corticocortical and corticosubcortical connections-seems crucial for the deficit to be persistent and severe. Patients with basal ganglia lesions and disorders, such as Parkinson's disease and progressive supranuclear palsy, may exhibit ideomotor apraxia, The putative roles of the basal ganglia in object-oriented action, and therefore inpraxis, would include among others (a) the selection of the kinematic parameters and the direction of arm movements, (b) working as an integral part of brain systems involved in timing and representation of action sequences,(c) encoding behavioral context, and (d) working as a subcortical component of the parietofrontal circuits devoted to sensorimotor transformation (e.g., reaching). Several studies suggest that basal ganglia pathology per se may not cause overt apraxia, However, when it is combined with dysfunction of the cortical components of the neural systems involved in sequencing, sensorimotor transformation, and response selection, different types of ideomotor praxis deficits would become clinically manifested. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 04:11:56