NPB+112+11+cerebellum%2C+basal+ganglia

NPB+112+11+cerebellum%2C+basal+ganglia - NPB 112, Winter...

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NPB 112, Winter 2011: 2/15/11 I. Cerebellum (Ch. 19) II. Basal ganglia (Ch. 18) Functions of Cerebellum 1. Maintains equilibrium and stance. 2. Correct ongoing movements. 3. Initiation of movement 4. Learns and stores motor programs. 5. Timing function (like a clock)? 6. Cognition? (e.g., language processing)
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Deficits due to cerebellar damage Turkish handwalkers: cerebellar defect compensated for by walking with aid of hands. 1. Vestibulocerebellum: ataxia a. loss of equilibrium, wide stance b. "drunken sailor's gait” 2. Spinocerebellum: loss of fine coordination. a. Decomposition of movement b. Can’t correct ongoing movement. (1) over- or undershoot of target (dysmetria) (2) timing deficit (disdiochokinesia) (3) Slurred speech (dysarthria) 3. Lateral cerebellum: a. Loss of learned motor skills (e.g., playing instrument) b. delay in initiating movements Fig. 19.1 (A)
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dentate To motor cortex Sensory feedback and motor command signals i n t e r p os d Fig. Fig. 19.10 (A)
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This document was uploaded on 03/26/2011.

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NPB+112+11+cerebellum%2C+basal+ganglia - NPB 112, Winter...

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