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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: Keep focussing: Striatal dopamine multiple functions resolved in a single mechanism tested in a simulated humanoid robot

Anno di pubblicazione: 2014

Formato: Elettronico

Autori: Fiore, Vincenzo G.; Sperati, Valerio; Mannella, Francesco; Mirolli, Marco; Gurney, Kevin N.; Friston, Karl J.; Dolan, Ray J.; Baldassarre, Gianluca

Affiliazioni autori: UCL Institute of Neurology; Istituto Di Scienze E Tecnologie Della Cognizione, Rome; University of Sheffield

Autori CNR:

  • GIANLUCA BALDASSARRE
  • FRANCESCO MANNELLA
  • MARCO MIROLLI
  • VALERIO SPERATI

Lingua: inglese

Abstract: The effects of striatal dopamine (DA) on behavior have been widely investigated over the past decades, with "phasic" burst firings considered as the key expression of a reward prediction error responsible for reinforcement learning. Less well studied is "tonic" DA, where putative functions include the idea that it is a regulator of vigor, incentive salience, disposition to exert an effort and a modulator of approach strategies. We present a model combining tonic and phasic DA to show how different outflows triggered by either intrinsically or extrinsically motivating stimuli dynamically affect the basal ganglia by impacting on a selection process this system performs on its cortical input. The model, which has been tested on the simulated humanoid robot iCub interacting with a mechatronic board, shows the putative functions ascribed to DA emerging from the combination of a standard computational mechanism coupled to a differential sensitivity to the presence of DA across the striatum. 2014 Fiore, Sperati, Mannella, Mirolli, Gurney, Friston, Dolan and Baldassarre.

Lingua abstract: inglese

Rivista:

Frontiers in Psychology Frontiers media
Paese di pubblicazione: Svizzera
Lingua: inglese

Numero volume: 5

Numero fascicolo: FEB

DOI: 10.3389/fpsyg.2014.00124

Stato della pubblicazione: Published version

Indicizzato da: Scopus [2-s2.0-84897584513]

Parole chiave:

  • Basal ganglia
  • Dopamine
  • ICub
  • Intrinsic motivation
  • Novelty
  • Selection

URL: http://www.scopus.com/record/display.url?eid=2-s2.0-84897584513&origin=inward

Strutture CNR:

Allegati: Keep focussing: Striatal dopamine multiple functions resolved in a single mechanism tested in a simulated humanoid robot (application/pdf)

 
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