Table of Contents
- 1 What is the definition of the cochlear nerve?
- 2 What is the cochlear nerve in the ear?
- 3 What is a cochlear and what does it do?
- 4 What forms the cochlear nerve?
- 5 What causes cochlear nerve damage?
- 6 How many cochlear nerves are there?
- 7 What happens if the cochlea is damaged?
- 8 What can result from a lesion on the cochlear nerve?
- 9 What are the most common causes of cochlear damage?
- 10 What is VIII nerve?
What is the definition of the cochlear nerve?
Medical Definition of cochlear nerve : a branch of the auditory nerve that arises in the spiral ganglion of the cochlea and conducts sensory stimuli from the organ of hearing to the brain. — called also cochlear, cochlear branch, cochlear division.
What is the cochlear nerve in the ear?
The cochlear nerve, also known as the acoustic nerve, is the sensory nerve that transfers auditory information from the cochlea (auditory area of the inner ear) to the brain. It is one of the many pieces that make up the auditory system, which enables effective hearing.
Is cochlear nerve same as auditory nerve?
The cochlear nerve, also known as the acoustic or auditory nerve, is the cranial nerve responsible for hearing.
What is a cochlear and what does it do?
A cochlear implant uses a sound processor that you wear behind your ear. Unlike hearing aids, which amplify sound, a cochlear implant bypasses damaged portions of the ear to deliver sound signals to the hearing (auditory) nerve.
What forms the cochlear nerve?
The longer central fibers, also called the primary auditory fibers, form the cochlear nerve, and the shorter, peripheral fibers extend to the bases of the inner and outer hair cells. They extend radially from the spiral ganglion to the habenula perforata, a series of tiny holes beneath the inner hair cells.
What is the cochlear nerve made of?
The three major components of the cochlear nuclear complex are (see figure below): the dorsal cochlear nucleus (DCN) the anteroventral cochlear nucleus (AVCN) the posteroventral cochlear nucleus (PVCN)
What causes cochlear nerve damage?
Many things can cause SNHL, or cochlear damage, including loud or extended noise exposure, certain powerful antibiotics, men- ingitis, Meniere’s disease, acoustic tumors, and even the natural decline in age can cause hearing loss.
How many cochlear nerves are there?
Both the peripheral process and the axon are myelinated. In humans, there are on average 30,000 nerve fibers within the cochlear nerve. The number of fibers varies significantly across species; the domestic cat, for example, has an average of 50,000 fibers.
How long is the cochlear nerve?
The cell bodies of the cochlear nerve lie within the cochlea and collectively form the spiral ganglion, named for the spiral shape it shares with the cochlea. These central axons exit the cochlea at its base and form a nerve trunk, which, in humans, is approximately one inch long.
What happens if the cochlea is damaged?
Cochlear Damage means that all or part of your inner ear has been hurt. Damage to the cochlea typically causes permanent hearing loss. This is called sensorineural hearing loss (SNHL). Noise-induced hearing loss, or NIHL, occurs when your ears are exposed to overly loud sounds.
What can result from a lesion on the cochlear nerve?
Yes the result from a lesion on the cochlear nerve is sensorineural deafness. The result from the fusion of the ossicles is conduction deafness.
What is the function of cochlea nerve?
The cochlear nerve is primarily responsible for transmitting the electrical impulses generated for hearing and localization of sound. The nerve has its origin in the bipolar cells of the spiral ganglion of the cochlea, which is located adjacent to the inner margin of the bony spiral lamina.
What are the most common causes of cochlear damage?
Exposure to loud noise can cause cochlear damage. Bacterial meningitis poses a severe risk of cochlear damage, as does mononucleosis. Exposure to loud noises is the most common cause of damage to the cochlea.
What is VIII nerve?
The vestibulocochlear nerves, cranial nerve VIII , are the eighth pair of cranial nerves and are numbered with the Roman numeral VIII. They are sensory nerves that run from the brain stem between the base of the brain (pons) and the spinal cord in an area known as the medulla oblongata .