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MBBS QUESTION #10274
Question 1
A patient with cerebellar disease demonstrates intention tremor, past-pointing (dysmetria), and difficulty performing rapid alternating movements (dysdiadochokinesia). These findings localize the lesion to:
  • The cerebellum✔️
  • The basal ganglia
  • The primary motor cortex
  • The dorsal columns of the spinal cord
Correct Answer Explanation
Dysmetria, intention tremor, and dysdiadochokinesia are classic signs of cerebellar dysfunction, reflecting loss of the cerebellum's role in coordinating the timing, force, and direction of voluntary movement, in contrast to basal ganglia disease (which produces tremor at rest, rigidity, bradykinesia) or dorsal column disease (which impairs proprioception and vibration sense).