Basal Ganglia: Control of Saccades
The basal ganglia are a set of subcortical interconnected nuclei, subdivided in parallel circuits. They form loops with specific cortical and subcortical regions and play a central role in the selection of actions as well as in learning to bias these selections towards the most profitable options. One of these loops appears to be specialized in saccadic eye movements. Most of the existing computational models consider that it is responsible for the choice, among all possible targets, of the target of the next saccade.
Basal Ganglia Saccadic Circuitry
The basal ganglia are a set of subcortical nuclei common to all vertebrates (see “Basal Ganglia: Overview”). The basal ganglia are components of two main types of loops: cortico-baso-thalamo-cortical loops (Alexander et al. 1986) as well as subcortical ones (McHaffie et al. 2005). Within these two categories, sub-loops can be characterized, dedicated to various functions; one cortical loop dedicated to eye...
KeywordsBasal Ganglion Reinforcement Learning Superior Colliculus Reward Prediction Error Cortical Loop
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