Eighth Cranial Nerve (CN VIII)

What is the Eighth Cranial Nerve (CN VIII)?

The eighth cranial nerve, also known as the vestibulocochlear nerve, is a pair of nerves that carry information from the inner ear to the brain. It is responsible for both hearing and balance.

Which part is innervated by the CN VIII?

The CN VIII innervates the cochlea, which is responsible for hearing, and the semicircular canals, which are responsible for balance.

What does CN VIII Vestibulocochlear do?

The CN VIII vestibulocochlear does two things:

  • Hearing: The cochlear branch of the CN VIII carries information from the cochlea to the brain. This information is then processed by the brain to create the sensation of hearing.
  • Balance: The vestibular branch of the CN VIII carries information from the semicircular canals to the brain. This information is then processed by the brain to help maintain balance.

What is cranial nerve VII and VIII?

The seventh and eighth cranial nerves are both located in the inner ear. The seventh cranial nerve, also known as the facial nerve, is responsible for facial expressions. The eighth cranial nerve, also known as the vestibulocochlear nerve, is responsible for hearing and balance.

Conclusion

The eighth cranial nerve is a vital part of the auditory system. It is responsible for both hearing and balance. If the CN VIII is damaged, it can lead to hearing loss or balance problems.

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