Vestibular nerve

Vestibibular Nerve

File:Gray's Anatomy plate 697.png

The vestibular nerve as part of the vestibulocochlear nerve, from Gray's Anatomy.

The vestibular nerve is one of the two branches of the vestibulocochlear nerve (the other being the cochlear nerve), which is itself the eighth cranial nerve. It is responsible for transmitting sensory information from the inner ear to the brain regarding balance and spatial orientation.

Structure

The vestibular nerve originates from the vestibular ganglion, where the cell bodies of the vestibular nerve fibers are located. It is composed of two main divisions: the superior and inferior vestibular nerves. The superior vestibular nerve carries information from the utricle, saccule and the semicircular canals. The inferior vestibular nerve primarily carries information from the saccule and a small portion of the posterior semicircular canal.

Function

The vestibular nerve carries information from the inner ear to the brain regarding head position and movement. This information is used to coordinate balance and eye movements. When the head moves, fluid in the semicircular canals moves, stimulating hair cells that send signals through the vestibular nerve to the brain.

Clinical significance

Damage to the vestibular nerve can result in vestibular neuritis, Meniere's disease, and benign paroxysmal positional vertigo (BPPV). Symptoms can include dizziness, loss of balance, and problems with spatial orientation.

See also

• Vestibulocochlear nerve
• Cochlear nerve
• Inner ear
• Vestibular system

References

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