Living Reference Work Entry

Encyclopedia of Computational Neuroscience

pp 1-4

Date: Latest Version

Basal Ganglia: Control of Saccades

  • Benoît GirardAffiliated withSorbonne Universités, UPMC Univ Paris 06 Email author 

Definition

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.

Detailed Description

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 movem ...

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