Alexandre Zenon

28 juin 2013

Université Catholique de Louvain, Institut de Neurosciences, Bruxelles, Belgique

Cortex isn’t everything : Visual attention and cost-benefit computation in subcortical structures

invité par Alexandre Eusebio

The study of the brain mechanisms of visual attention has remained focused for a long time on cortex. I will first present evidence demonstrating the crucial role of Superior Colliculus, a structure of the brainstem, in the control of visual selection and its apparent independence from the classical cortical mechanisms.

Another subcortical structure, the Subthalamic Nucleus (STN), is part of the basal ganglia network and is the main target of deep electrodes implantation in Parkinson’s disease. Some authors have recently proposed that slowness of movement in this disease might arise from an inadequate cost-benefit computation leading to the inability to invest the right amount of effort in the actions. Following this hypothesis, we investigated whether a correlate of cost-benefit computation can be found in the STN. I will present preliminary results from this study.

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