Subthalamic nucleus-wild flailing movements of the extremities, especially the upper, are hemiballistic movements (hemiballismus);these are characteristic of a lesion in the subthalamic nucleus. damage to the cerebellar cortex and nuclei and the lenticularnucleus will result in motor deficits, but these are usually described as involving tremor, ataxia, and related motor problems. the ventral lateral nucleus is a thalamic relay center for motor information and the ventral posterolateral nucleus is a sensory relay nucleus. lesions of these nuclei will result in motor (but not hemiballismus) and sensory deficits.(p.145149,160)
