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Weakness in upper motor neurone lesions

Authoring team

The distribution of weakness after upper motor neurone lesions is:

In the upper limb:

  • shoulder abduction
  • wrist and finger extension and finger abduction are weaker than antagonist responses

In the lower limb:

  • hip flexion, knee flexion, dorsiflexion and eversion of the foot are weaker than their antagonists' action
  • patient may be unable to lift the leg off the bed and can have a foot drop at a time when hip extension and quadriceps function are normal and it is possible to stand on 'tiptoe'.

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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