Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Contrasting the dorsal and ventral visual systems: Guidance of movement versus decision making
Autore:
Passingham, RE; Toni, I;
Indirizzi:
Univ Oxford, Dept Expt Psychol, Oxford OX1 3UD, England Univ Oxford Oxford England OX1 3UD Expt Psychol, Oxford OX1 3UD, England Univ Coll London, Inst Neurol, Wellcome Dept Cognit Neurol, London WC1N 3BG, England Univ Coll London London England WC1N 3BG eurol, London WC1N 3BG, England KFA Julich GmbH, Forschungszentrum, Inst Med, D-52425 Julich, Germany KFA Julich GmbH Julich Germany D-52425 Inst Med, D-52425 Julich, Germany
Titolo Testata:
NEUROIMAGE
fascicolo: 1, volume: 14, anno: 2001,
parte:, 2 supplemento:, S
pagine: S125 - S131
SICI:
1053-8119(200107)14:1<S125:CTDAVV>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMATE PREFRONTAL CORTEX; POSTERIOR PARIETAL CORTEX; PREMOTOR CORTEX; MACAQUE MONKEY; FRONTAL-CORTEX; RHESUS-MONKEY; ASSOCIATION CORTEX; REPRESENTATION; CONNECTIONS; PATHWAYS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Passingham, RE Univ Oxford, Dept Expt Psychol, S Parks Rd, Oxford OX1 3UD,England Univ Oxford S Parks Rd Oxford England OX1 3UD 3UD, England
Citazione:
R.E. Passingham e I. Toni, "Contrasting the dorsal and ventral visual systems: Guidance of movement versus decision making", NEUROIMAGE, 14(1), 2001, pp. S125-S131

Abstract

It is widely accepted that the ventral visual pathways are involved in theidentification of objects and the dorsal visual pathways in the visual guidance of reaching and grasping movements. But there are also situations, such as in a choice reaction time task, in which the subjects must select between actions on the basis of visual cues, This paper uses brain imaging to explore the pathways that are involved. Studies using PET and fMRI show that when subjects learn which actions are appropriate given the visual context, there are learning-related increases in the inferotemporal cortex and the ventral prefrontal cortex to which it projects. An event-related fMRI study shows that the activity in the inferotemporal cortex is time-locked to the presentation of the visual cue and the activity in the ventral prefrontal cortex to the response. Finally two PET studies directly compare the dorsal and ventral systems. In the second of these the subjects either move their finger on a moving target or identify the direction of movement and press one of two buttons to report the direction. When the subjects report the direction there is activity in the middle temporal. gyrus and ventral prefrontal cortex. It is suggested that, when subjects must consciously identifythe context and decide on the appropriate action, ventral pathways are involved. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/01/20 alle ore 12:53:52