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T. VILIS &mrtmcn J-. I-IORE Uniwrsity ofâ Western Ontario, London, Ontario, Cunada N6A 5 CI t c/JâPhysiology, SUMMARY CONCLUSIONS 1. An animal model for the study of cerebellar intention was produced by implanting cryoprobe sheaths alongside the dentate interpositus nuclei of the cerebellum in three Cc>bris monkeys. These monkeys were trained to make fast flexion extension elbow movements by moving a hle in a horizontal arc to resist perturbations applied to the hle as it was held within target regions. 2. Cooling through both sheaths simultaneously (to 10°C sheath reference temperature) resulted in a 3- to ~-HZ in the ipsilateral forelimb, which was especially evident during rapid movements following perturbations applied to the hle. 3. The character of the was altered by mechanical loads applied to the limb: the frequency was increased by addition of spring stiffness by an increase in constant torque decreased by addition of mass. The amplitude of the was decreased by an increase in viscous resistance. In addition, romly timed perturbations applied to the forearm resynchronized the phase of the . 4. The frequency of the was also dependent on the position of the forelimb, being higher in flexion than in extension. 5. During
Journal of Neurophysiology – The American Physiological Society
Published: Sep 1, 1977
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