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Chapter: Medicine and surgery: Nervous system

Abducent nerve (VI) lesion - Disorders of cranial nerves

Supplies lateral rectus. It exits from the brainstem and runs through the subarachnoid space into the cavernous sinus, then passes through the superior orbital fissue.

Abducent nerve (VI) lesion

 

Anatomy

 

Supplies lateral rectus. It exits from the brainstem and runs through the subarachnoid space into the cavernous sinus, then passes through the superior orbital fissue.

 

Function

 

Lateral rectus deviates the eye laterally.

 

Specific causes

 

Particularly at risk from raised intracranial pressure or trauma due to its long course. Often occurs as a combined III, IV and VI nerve palsies

 

Clinical features

 

Diplopia on looking to the side. III, IV and VI combined nerve palsies are seen in stroke, tumours, Wernicke’s encephalopathy, aneurysms and cavernous sinus thrombosis.

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Medicine and surgery: Nervous system : Abducent nerve (VI) lesion - Disorders of cranial nerves |

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Medicine and surgery: Nervous system


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