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[0] Nakahara H, Doya K, Hikosaka O, Parallel cortico-basal ganglia mechanisms for acquisition and execution of visuomotor sequences - a computational approach.J Cogn Neurosci 13:5, 626-47 (2001 Jul 1)

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ref: Nakahara-2001.07 tags: basal ganglia model cerebral cortex motor learning date: 10-05-2008 02:38 gmt revision:0 [head]

PMID-11506661[0] Parallel cortico-basal ganglia mechanisms for acquisition and execution of visuomotor sequences - a computational approach.

  • Interesting model of parallel motor/visual learning, the motor through the posterior BG (the middle posterior part of the putamen) and supplementary motor areas, and the visual through the dorsolateral prefrontal cortex and the anterior BG (caudate head and rostral putamen).
  • visual tasks are learned quicker due to the simplicity of their transform.
  • require a 'coordinator' to adjust control of the visual and motor loops.
  • basal ganglia-thalamacortical loops are highly topographic; motor, oculomotor, prefrontal and limbic loops have been found.
  • pre-SMA, not the SMA, is connected to the prefrontal cortex.
  • pre-SMA receives connections from the rostral cingulate motor area.
  • used actor-critic architecture, where the critic learns to predict cumulative future rewards from state and the actor produces movements to maximize reward (motor) or transformations (sensory). visual and motor networks are actors in visual and motor representations, respectively.
  • used TD learning, where TD error is encoded via SNc.
  • more later, not finished writing (need dinner!)

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