Upper Limb Dysdiadochokinesis

  • Dysdiadochokinesis is the inability to perform rapidly alternating contractions of agonist and antagonist muscles.
  • This sign is indicative of cerebellar disease due to ischaemia, haemorrhage, tumour or multiple sclerosis.
    • How to Elicit

    • Ask the patient to place one hand in the palm of the other hand. Demonstrate rapidly flipping (pronation and supination) of the hand, asking for them to mimic this movement.
    • Abnormal If

    • Inability to rapidly alternate movements.
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