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Hypoglossal Nerve Disorders

By

Michael Rubin

, MDCM, New York Presbyterian Hospital-Cornell Medical Center

Last full review/revision Sep 2020| Content last modified Sep 2020
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Disorders of the 12th cranial nerve (hypoglossal nerve) cause weakness or wasting (atrophy) of the tongue on the affected side. This nerve moves the tongue.

  • Hypoglossal nerve disorders may be caused by tumors, strokes, infections, injuries, or amyotrophic lateral sclerosis.

  • People with hypoglossal nerve disorder have difficulty speaking, chewing, and swallowing.

  • Doctors usually do magnetic resonance imaging and/or a spinal tap to identify the cause.

  • The cause is treated.

Causes of Hypoglossal Nerve Disorders

Symptoms of Hypoglossal Nerve Disorders

The tongue becomes weak on the affected side and eventually wastes away (atrophies). As a result, people have difficulty speaking, chewing, and swallowing. Damage due to amyotrophic lateral sclerosis causes tiny, subtle twitching movements (fasciculations) on the surface of the tongue.

Diagnosis of Hypoglossal Nerve Disorders

  • Magnetic resonance imaging

  • Sometimes a spinal tap

Magnetic resonance imaging (MRI) is usually done to look for a tumor or evidence of a stroke.

Treatment of Hypoglossal Nerve Disorders

  • Treatment of the cause

Treatment of hypoglossal nerve disorders depends on the cause.

NOTE: This is the Consumer Version. DOCTORS: CLICK HERE FOR THE PROFESSONAL VERSION
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Test your knowledge
Bell Palsy
Bell palsy is sudden weakness or paralysis of the muscles on one side of the face due to malfunction of the seventh cranial nerve. This nerve moves facial muscles, stimulates salivary and tear glands, detects tastes, and controls a muscle involved in hearing. Which of the following is often the first symptom of Bell palsy?
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