What happens when left hypoglossal nerve is damaged?

What happens when left hypoglossal nerve is damaged?

Damage to the hypoglossal nerve causes paralysis of the tongue. Usually, one side of the tongue is affected, and when the person sticks out his or her tongue, it deviates or points toward the side that is damaged.

When there is damage to cranial nerve XII How is the tongue affected?

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.

What muscles are innervated by CN XII?

The hypoglossal nerve (CN XII) is exclusively a motor nerve carrying general somatic efferent fibers (GSE). It innervates all intrinsic and almost all extrinsic muscles of the tongue, as well as one suprahyoid muscle, the geniohyoid muscle.

What causes hypoglossal nerve palsy?

1 Numerous causes of isolated hypoglossal nerve palsy have been described. Intracranial neoplasms, skull base neoplasms, and vertebral trauma have classically been reported as the most frequent causes, accounting for up to 50% of cases.

What nerve helps you swallow?

The glossopharyngeal nerve enervates muscles involved in swallowing and taste. Lesions of the ninth nerve result in difficulty swallowing and disturbance of taste. The vagus nerve enervates the gut (gastrointestinal tract), heart and larynx.

How does the tongue connected to the brain?

The tongue has extensive motor and sensory integration with the brain, Danilov explains. The nerves on the tip of the tongue are directly connected to the brain stem, a crucial hub that directs basic bodily processes.

Which side of the brain controls the tongue?

There is an area in the frontal lobe of the left hemisphere called Broca’s area. It is next to the region that controls the movement of facial muscles, tongue, jaw and throat.

What is the function of the 12 cranial nerves?

The cranial nerves are a set of 12 paired nerves in the back of your brain. Cranial nerves send electrical signals between your brain, face, neck and torso. Your cranial nerves help you taste, smell, hear and feel sensations. They also help you make facial expressions, blink your eyes and move your tongue.

How does the hypoglossal nerve affect speech?

The hypoglossal nerve enables tongue movement. It controls the hyoglossus, intrinsic, genioglossus and styloglossus muscles. These muscles help you speak, swallow and move substances around in your mouth.

What side of the brain affects swallowing?

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