Cerebellar dysfunction

The cerebellum is responsible for rate and range of motion, fine motor control, and equilibrium.

Common clinical signs of cerebellar dysfunction

  • Dysmetria – most often hypermetria (“goose stepping”)
  • Truncal ataxia
  • Intention tremors
  • Vestibular signs
  • Ipsilateral postural reaction deficits
  • Occasional ipsilateral absent menace response (with normal vision, palpebral and no forebrain signs)
  • +/- Anisocoria (pupil dilated contralateral to lesion)
  • +/- Opisthotonus

Case example of a dog with cerebellar dysfunction because of cerebellar cortical degeneration (cerebellar abiotrophy).