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Istituto di scienze e tecnologie della cognizione

Torna all'elenco Contributi in rivista anno 2014

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Decision and action planning signals in human posterior parietal cortex during delayed perceptual choices

Anno di pubblicazione: 2014

Autori: Tosoni, Annalisa; Corbetta, Maurizio; Calluso, Cinzia; Committeri, Giorgia; Pezzulo, Giovanni; Romani, Gian Luca; Galati, Gaspare

Affiliazioni autori: University of G. d'Annunzio Chieti and Pescara; Washington University in St. Louis, School of Medicine; Istituto Di Scienze E Tecnologie Della Cognizione, Rome; Universita degli Studi di Roma La Sapienza; IRCCS Fondazione Santa Lucia

Autori CNR:

  • GIOVANNI PEZZULO

Lingua: inglese

Abstract: During simple perceptual decisions, sensorimotor neurons in monkey fronto-parietal cortex represent a decision variable that guides the transformation of sensory evidence into a motor response, supporting the view that mechanisms for decision-making are closely embedded within sensorimotor structures. Within these structures, however, decision signals can be dissociated from motor signals, thus indicating that sensorimotor neurons can play multiple and independent roles in decision-making and action selection/planning. Here we used functional magnetic resonance imaging to examine whether response-selective human brain areas encode signals for decision-making or action planning during a task requiring an arbitrary association between face pictures (male vs. female) and specific actions (saccadic eye vs. hand pointing movements). The stimuli were gradually unmasked to stretch the time necessary for decision, thus maximising the temporal separation between decision and action planning. Decision-related signals were measured in parietal and motor/premotor regions showing a preference for the planning/execution of saccadic or pointing movements. In a parietal reach region, decision-related signals were specific for the stimulus category associated with its preferred pointing response. By contrast, a saccade-selective posterior intraparietal sulcus region carried decision-related signals even when the task required a pointing response. Consistent signals were observed in the motor/premotor cortex. Whole-brain analyses indicated that, in our task, the most reliable decision signals were found in the same neural regions involved in response selection. However, decision- and action-related signals within these regions can be dissociated. Differences between the parietal reach region and posterior intraparietal sulcus plausibly depend on their functional specificity rather than on the task structure. 2014 Federation of European Neuroscience Societies and John Wiley & Sons Ltd.

Lingua abstract: inglese

Pagine da: 1370

Pagine a: 1383

Rivista:

European journal of neuroscience Published on behalf of the European Neuroscience Association by Oxford University Press,
Paese di pubblicazione: Regno Unito
Lingua: inglese
ISSN: 0953-816X

Numero volume: 39

Numero fascicolo: 8

DOI: 10.1111/ejn.12511

Indicizzato da: Scopus [2-s2.0-84899094887]

Parole chiave:

  • Action planning
  • Decision-making
  • Delayed choice
  • Evidence accumulation
  • Stimulus unmasking

URL: http://www.scopus.com/record/display.url?eid=2-s2.0-84899094887&origin=inward

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