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Chapter: Medicine and surgery: Nervous system

Hypoglossal nerve (XII) lesions - Disorders of cranial nerves

This arises from the hypoglossal nucleus in the medulla, and is a motor nerve supplying the muscles of tongue except palatoglossus.

Hypoglossal nerve (XII) lesions

 

Anatomy

 

This arises from the hypoglossal nucleus in the medulla, and is a motor nerve supplying the muscles of tongue except palatoglossus.

 

Function

 

Speech, swallowing.

 

Specific causes

 

Stroke, bulbar palsy, polio, trauma and tuberculosis.

 

Clinical features

 

Tongue deviates to side of lesion when patient is asked to stick tongue out. The tongue may appear wasted.

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

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Medicine and surgery: Nervous system


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