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The akinesia of Parkinsonism is relieved by pallidotomy and subthalamic nucleotomy, but not by thalamotomy. Therefore, this disabling symptom probably depends upon connections other than the pallidalthalamocortical tracts, possibly efferents of the medial pallidum descending to the upper brainstem. We have previously demonstrated akinesia in the normal monkey following radiofrequency lesioning in the region of the pedunculopontine nucleus (PPN), one of the primary targets for descending pallidal outflow. Here, we confirm that selectively destroying neurones in the PPN area, whilst sparing fibres of passage, results in an akinetic state in normal macaques.

Type

Journal article

Journal

Exp Brain Res

Publication Date

12/1999

Volume

129

Pages

511 - 517

Keywords

Alfaxalone Alfadolone Mixture, Animals, Basal Ganglia, Behavior, Animal, Excitatory Amino Acid Agonists, Female, Hypokinesia, Kainic Acid, Macaca mulatta, Male, Neural Pathways, Parkinson Disease, Secondary, Pons