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Titolo:
EFFECTS OF REVERSIBLE INACTIVATION OF THE SUPPLEMENTARY MOTOR AREA (SMA) ON UNIMANUAL GRASP AND BIMANUAL PULL AND GRASP PERFORMANCE IN MONKEYS
Autore:
KERMADI I; LIU Y; TEMPINI A; ROUILLER EM;
Indirizzi:
UNIV FRIBOURG,INST PHYSIOL,RUE MUSEE 5 CH-1700 FRIBOURG SWITZERLAND UNIV FRIBOURG,INST PHYSIOL CH-1700 FRIBOURG SWITZERLAND
Titolo Testata:
Somatosensory & motor research
fascicolo: 4, volume: 14, anno: 1997,
pagine: 268 - 280
SICI:
0899-0220(1997)14:4<268:EORIOT>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PREMOTOR CORTEX; NEURONAL-ACTIVITY; MACAQUE MONKEY; CORTICAL AREAS; FUNCTIONAL-ORGANIZATION; SEQUENTIAL MOVEMENTS; VOLUNTARY MOVEMENTS; REACHING MOVEMENTS; CEREBRAL-CORTEX; PARIETAL CORTEX;
Keywords:
MONKEY; MUSCIMOL; SMA; BIMANUAL COORDINATION; SELF-PACED MOVEMENTS; MOTOR INITIATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
63
Recensione:
Indirizzi per estratti:
Citazione:
I. Kermadi et al., "EFFECTS OF REVERSIBLE INACTIVATION OF THE SUPPLEMENTARY MOTOR AREA (SMA) ON UNIMANUAL GRASP AND BIMANUAL PULL AND GRASP PERFORMANCE IN MONKEYS", Somatosensory & motor research, 14(4), 1997, pp. 268-280

Abstract

The supplementary motor area (SMA) was reversibly inactivated by muscimol microinfusion in two monkeys while they were performing two motortasks: (1) a delayed conditional bimanual drawer pulling and graspingsequence which was initiated on a self-paced basis; (2) a unimanual reach and grasp task (modified Kluver board task). Unilateral or bilateral inactivation of the SMA induced a prominent deficit in trial initiation of bimanual sequential movements, affecting the hand contralateral to the inactivated side or both hands, respectively. The deficit was a long lasting (10-15 min or more) inability of the monkey to place its hand (s) in the ready position on start touch-sensitive pads, a condition required to initiate the drawer task. However, if after such adeficit period, the experimenter put his hand on the start touch-sensitive pad to initiate the trial, then the monkey executed the drawer task without obvious motor deficit. SMA inactivation did not affect unimanual reaching and grasping movements in the board task. In contrast to the SMA, inactivation of other motor areas (primary, premotor dorsal, anterior intraparietal area) did not affect the initiation of movement sequences in the drawer task. These data thus indicate that the SMA plays a crucial and specific role in initiation of self-paced movement sequences. However, SMA inactivation did not prevent the monkeys toperform coordinated movements of the two forelimbs and hands, indicating that SMA is not necessary for bimanual coordination.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 16:45:09