Coordination of aimed movements in a case of unilateral cerebellar damage.
We have studied multi-joint arm movements in a patient with right cerebellar damage. Our patient's kinetic tremor was reduced in the absence of visual feedback, but increased when performing a concurrent cognitive task. We suggest that her kinetic tremor reflects use of a slow cortical feedback circuit for error-corrections during movement. Analysing the spatial relation between hand aperture and hand transport in prehensile movements, we found preserved strategic, trial-to-trial coordination, but impaired reactive, within-trial coordination. We conclude that the proprioceptive representations provided by the normal cerebellum play an important role in coordinating multi-joint movement.
Haggard
P
P
University Laboratory of Physiology, Oxford, U.K.
Jenner
J
J
Wing
A
A
D000328:Adult; D001288:Attention / Q000502:physiology; D001925:Brain Damage, Chronic / Q000503:physiopathology* / Q000523:psychology; D002528:Cerebellar Neoplasms / Q000503:physiopathology* / Q000523:psychology / Q000601:surgery; D002540:Cerebral Cortex / Q000503:physiopathology; D004292:Dominance, Cerebral / Q000502:physiology*; D004806:Ependymoma / Q000503:physiopathology* / Q000523:psychology / Q000601:surgery; D005246:Feedback / Q000502:physiology; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D007699:Kinesthesis / Q000502:physiology; D009048:Motor Skills / Q000502:physiology; D009415:Nerve Net / Q000503:physiopathology; D009460:Neurologic Examination; D009483:Neuropsychological Tests; D009949:Orientation / Q000502:physiology; D011183:Postoperative Complications / Q000503:physiopathology / Q000523:psychology; D011596:Psychomotor Disorders / Q000503:physiopathology* / Q000523:psychology; D011930:Reaction Time / Q000502:physiology