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Mahlon R. DeLong, MD; Thomas Wichmann, MD

Arch Neurol. 2007;64(1):20-24.

Views of the anatomy and function of the basal ganglia and their role in motor and nonmotor disorders have undergone major revisions during the past decades. The basal ganglia are now appreciated as components of parallel, reentrant cortico-subcortical circuits, which originate from individual cortical areas, traverse the basal ganglia and thalamus, and terminate in their respective areas of origin in the frontal lobe. Further research and clinical experience have resulted in new insights and perspectives on the details of the circuitry and on the role of these structures in Parkinson disease and other basal ganglia disorders. On the basis of anatomical and physiological studies and the striking success of focused surgical interventions, it seems appropriate to view these varied clinical disorders as circuit disorders, resulting from pathologic disturbances in neuronal activity throughout specific cortico-subcortical loops.

Author Affiliations: Department of Neurology, Emory University School of Medicine, Atlanta, Ga.

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