Differences observed in subcortical motor structures active during automatic and effortful movements
Witt S, McMillan K, Meyerand M
University of Wisconsin
Functional activation maps indicate that a dichotomy exists between the subcortical motor structures involved in automatic and effortful movements. The basal ganglia, in particular, the putamen is preferentially active during automatic movements; the cerebellum, in the region of the dentate nuclei, is preferentially active during effortful movements. This observed dichotomy is similar to results from previous studies examining internally generated and externally guided movements.