Basal Ganglia
The basal ganglia are four large nuclear masses that overhang the thalamus and are important in gross types of movement. They exert indirect control over motor function through their projections to the cerebral cortex and reticular formation.

The image above dramatically illustrates the relationship of the caudate nucleus to the internal capsule. The other major parts of the basal ganglia, the putamen and globus pallidus, lie behind the front or head of the caudate. The Basis Pedunculi consists of fibers arising from the spinal cord and brainstem areas. The internal capsule consists of the corticospinal tract and other fibers emerging primarily from the thalamus. These make up the greater portion of the corona radiata.