Lecture 9: Cerebellum PDF
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DePauw University
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Summary
This lecture covers the cerebellum, including cardinal features of cerebellar dysfunction, ataxia, and tremor. It details the role of the cerebellum in coordinating movement and the implications of cerebellar damage.
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Lecture 9 Cerebellum Cardinal Features of Cerebellar Dysfunction Hypotonia Ataxia Dysarthria Tremor Ocular Motor Dysfunction Ataxia Defective timing of sequential contraction of agonist /antagonist muscles Results in a disturbance in smooth perform...
Lecture 9 Cerebellum Cardinal Features of Cerebellar Dysfunction Hypotonia Ataxia Dysarthria Tremor Ocular Motor Dysfunction Ataxia Defective timing of sequential contraction of agonist /antagonist muscles Results in a disturbance in smooth performance of voluntary acts (errors in rate, range, force, duration) Without cerebellar modulation, skilled movements originating in cerebral cortex are inaccurate, poorly controlled May affect limbs, trunk, gait (depends on part of cerebellum involved) usually persists despite visual cues (unlike ataxia due to posterior column disease affecting the spinal cord) Tremor rhythmic, alternating, or oscillatory movements can be a normal exaggeration of movement, a primary disorder, or a symptom of a cerebellar disorder or Parkinson's disease Diagnosis is usually clinical Treatment varies by etiology
