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Titolo:
C-14-deoxyglucose mapping of the monkey brain during reaching to visual targets
Autore:
Savaki, HE; Dalezios, Y;
Indirizzi:
Univ,Crete, Sch Hlth Sci, Div Med, Dept Basic Sci, GR-71110 Iraklion, Crete Univ Crete Iraklion Crete Greece GR-71110 c Sci, GR-71110 Iraklion, Crete Fdnon,s & Technol Hellas, Inst Appl & Computat Math, FORTH, GR-71110 Irakli Fdn Res & Technol Hellas Iraklion Crete Greece GR-71110 , GR-71110 Irakli
Titolo Testata:
PROGRESS IN NEUROBIOLOGY
fascicolo: 6, volume: 58, anno: 1999,
pagine: 473 - 540
SICI:
0301-0082(199908)58:6<473:CMOTMB>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSTERIOR PARIETAL CORTEX; SUPERIOR TEMPORAL SULCUS; SUPPLEMENTARY MOTOR AREA; FRONTAL EYE FIELDS; LATERAL INTRAPARIETAL AREA; POSITRON EMISSION TOMOGRAPHY; SOMATIC SENSORY CORTEX; DORSOLATERAL PREFRONTAL CORTEX; DIMENSIONAL ARM MOVEMENTS; SACCADE-RELATED ACTIVITY;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
620
Recensione:
Indirizzi per estratti:
Indirizzo: Savaki, HE Univion,te, Sch Hlth Sci, Div Med, Dept Basic Sci, POB 1393, GR-71110 Irakl Univ Crete POB 1393 Iraklion Crete Greece GR-71110 -71110 Irakl
Citazione:
H.E. Savaki e Y. Dalezios, "C-14-deoxyglucose mapping of the monkey brain during reaching to visual targets", PROG NEUROB, 58(6), 1999, pp. 473-540

Abstract

The strategies used by the macaca monkey brain in controlling the performance of a reaching movement to a visual target have been studied by the quantitative autoradiographic C-14-DG method. Experiments on visually intact monkeys reaching to a visual target indicate that V1 and V2 convey visuomotor information to the cortex of the superior temporal and parietoccipital sulci which map encode the position of the moving forelimb, and to the cortex in the ventral part and lateral bank of the intraparietal sulcus which may encode the location of the visual target. The involvement of the medial bank of the intraparietal sulcus in proprioceptive guidance of movement is also suggested on the basis of the parallel metabolic effects estimated in this region and in the forelimb representations of the primary somatosensory and motor cortices. The network including the inferior postarcuate skeletomotor and prearcuate oculomotor cortical fields and the caudal periprincipal area 46 may participate in sensory-to-motor and oculomotor-to-skeletomotor transformations, in parallel with the medial and lateral intraparietal cortices. Experiments on split brain monkeys reaching to visual targets revealed that reaching is always controlled by the hemisphere contralateral to the moving forelimb whether it is visually intact or 'blind'. Two supplementary mechanisms compensate for the 'blindness' of the hemisphere controlling the moving forelimb. First, the information about the location of the target is derived from head and eye movements and is sent to the 'blind' hemisphere via inferior parietal cortical areas, while the information about the forelimb position is derived from proprioceptive mechanisms and is sent via the somatosensory and superior parietal cortices. Second, the cerebellar hemispheric extensions of vermian lobules V, VI and VIII, ipsilateral to the movingforelimb, combine visual and oculomotor information about the target position, relayed by the 'seeing' cerebral hemisphere, with sensorimotor information concerning cortical intended and peripheral actual movements of the forelimb, and then send this integrated information back to the motor cortex of the 'blind' hemisphere, thus enabling it to guide the contralateral forelimb to the target. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/05/20 alle ore 15:42:06