Interaction Between Cognitive and Motor Cortico-Basal Ganglia Loops During Decision Making: A Computational Study

Martin Guthrie 1 Arthur Leblois 2 André Garenne 3 Thomas Boraud 1
3 Mnemosyne - Mnemonic Synergy
LaBRI - Laboratoire Bordelais de Recherche en Informatique, Inria Bordeaux - Sud-Ouest, IMN - Institut des Maladies Neurodégénératives [Bordeaux]
Abstract : n a previous modeling study, Leblois et al. (2006) demonstrated an action selection mechanism in cortico-basal ganglia loops based on competition between the positive feedback, direct pathway through the striatum and the negative feedback, hyperdirect pathway through the subthalamic nucleus. The present study investigates how multiple level action selection could be performed by the basal ganglia. To do this, the model is extended in a manner consistent with known anatomy and electrophysiology in three main areas. First, two-level decision making has been incorporated, with a cognitive level selecting based on cue shape and a motor level selecting based on cue position. We show that the decision made at the cognitive level can be used to bias the decision at the motor level. We then demonstrate that, for accurate transmission of information between decision-making levels, low excitability of striatal projection neurons is necessary, a generally observed electrophysiological finding. Second, instead of providing a biasing signal between cue choices as an external input to the network, we show that the action selection process can be driven by reasonable levels of noise. Finally, we incorporate dopamine modulated learning at corticostriatal synapses. As learning progresses, the action selection becomes based on learned visual cue values and is not interfered with by the noise that was necessary before learning.
Type de document :
Article dans une revue
Journal of Neurophysiology, American Physiological Society, 2013
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https://hal.inria.fr/hal-00828004
Contributeur : André Garenne <>
Soumis le : jeudi 30 mai 2013 - 10:19:25
Dernière modification le : jeudi 11 janvier 2018 - 06:26:02

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  • HAL Id : hal-00828004, version 1

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Martin Guthrie, Arthur Leblois, André Garenne, Thomas Boraud. Interaction Between Cognitive and Motor Cortico-Basal Ganglia Loops During Decision Making: A Computational Study. Journal of Neurophysiology, American Physiological Society, 2013. 〈hal-00828004〉

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