Sixth nerve palsy

A sixth nerve palsy results in weakness of the muscle supplied by the abducens nerve, the ipsilateral lateral rectus muscle. This leads clinically to an eye that is unable to abduct.

The abducens nerve has the longest subarachnoid course of all the cranial nerves.

  1. Increased ICP can result in downward displacement of the brainstem, causing stretching of the sixth nerve secondary to its location within Dorello's canal
  2. Any subarachnoid abnormality including haemorrhage, infection, and tumour, including cavernous sinus mass
  3. Infectious and inflammatory etiologies (eg, postviral, demyelinating, diabetes)
  4. Neoplasm of the pons
  5. Trauma
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Article information

rID: 12883
Synonyms or Alternate Spellings:
  • abducens nerve palsy

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