RT Book, Section A1 Simon, Roger P. A1 Aminoff, Michael J. A1 Greenberg, David A. SR Print(0) ID 1148742265 T1 Movement Disorders T2 Clinical Neurology, 10e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259861727 LK neurology.mhmedical.com/content.aspx?aid=1148742265 RD 2024/03/29 AB Movement disorders (sometimes called extrapyramidal disorders) impair the regulation of voluntary motor activity without directly affecting strength, sensation, or cerebellar function. They include hyperkinetic disorders associated with abnormal, involuntary movements and hypokinetic disorders characterized by poverty of movement. Movement disorders result from dysfunction of deep subcortical gray matter structures termed the basal ganglia. Although there is no universally accepted anatomic definition of the basal ganglia, for clinical purposes they may be considered to comprise the caudate nucleus, putamen, globus pallidus, subthalamic nucleus, and substantia nigra. The putamen and the globus pallidus are collectively termed the lentiform nucleus; the combination of lentiform nucleus and caudate nucleus is designated the corpus striatum.