View source for Basal Ganglia

The '''basal ganglia''' are a set of subcortical nuclei — the striatum, globus pallidus, substantia nigra, and subthalamic nucleus — that form the brain's primary [[Action Selection|action selection]] system. They do not initiate movement but gate competing motor and cognitive programs, permitting some while suppressing others through a combination of direct and indirect pathways. In the context of [[Procedural Memory|procedural memory]], the basal ganglia are responsible for chunking complex sequences into automatized units and for the reinforcement-learning dynamics that strengthen successful action patterns. Their degeneration in [[Parkinson's Disease|Parkinson's disease]] reveals their fundamental role in converting intention into effortless action.

[[Category:Neuroscience]]
[[Category:Systems]]