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Chapter: Medicine and surgery: Nervous system

Accessory nerve (XI) lesions - Disorders of cranial nerves

Spinal accessory branch arises from upper cervical cord segments and passes through the foramen magnum to join the cranial accessory branch. They leave the skull separately through the jugular foramen.

Accessory nerve (XI) lesions

 

Anatomy

 

Spinal accessory branch arises from upper cervical cord segments and passes through the foramen magnum to join the cranial accessory branch. They leave the skull separately through the jugular foramen.

 

 

Function

 

Cranial nerves join the pharyngeal plexus and supply the muscles of the palate, pharynx and larynx. The spinal part supplies trapezius and sternocleidomastoid.

 

 

Specific causes

 

Polio, syringomyelia, tumours near the jugular foramen.

 

 

Clinical features

 

Weakness of lifting ipsilateral shoulder and turning head against resistance towards the contralateral side.

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Medicine and surgery: Nervous system : Accessory nerve (XI) lesions - Disorders of cranial nerves |

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Medicine and surgery: Nervous system


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