Eighth
Eighth Cranial Nerve
The Eighth Cranial Nerve (pronounced: EY-th KRAY-nee-uhl NURV), also known as the Vestibulocochlear Nerve (pronounced: ves-tib-yoo-lo-KOH-klee-er NURV), is one of the twelve Cranial Nerves that originate from the brain. It is responsible for transmitting sound and equilibrium (balance) information from the inner ear to the brain.
Etymology
The term "Eighth Cranial Nerve" is derived from its position as the eighth pair of cranial nerves in the human body. The term "Vestibulocochlear" is derived from the Latin words "vestibulum", which means entrance hall, and "cochlea", which means snail shell, referring to the parts of the inner ear that this nerve connects to.
Function
The Eighth Cranial Nerve is divided into two parts: the Cochlear Nerve and the Vestibular Nerve. The Cochlear Nerve carries auditory sensory information from the cochlea of the inner ear, while the Vestibular Nerve carries balance sensory information from the vestibule and semicircular canals of the inner ear.
Related Terms
- Cranial Nerves: The twelve pairs of nerves that emerge directly from the brain.
- Cochlear Nerve: The branch of the Eighth Cranial Nerve that carries auditory sensory information.
- Vestibular Nerve: The branch of the Eighth Cranial Nerve that carries balance sensory information.
- Inner Ear: The part of the ear where sound and balance information is processed before being sent to the brain.
External links
- Medical encyclopedia article on Eighth
- Wikipedia's article - Eighth
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