Nerve deafness

What is Nerve deafness?

Sensorineural hearing loss (SNHL) is a type of hearing loss in which the root cause lies in the vestibulocochlear nerve (cranial nerve VIII), the inner ear, or central processing centers of the brain. Sensorineural hearing loss can be mild, moderate, or severe, including total deafness.

The great majority of human sensorineural hearing loss is caused by abnormalities in the hair cells of the organ of Corti in the cochlea. There are also very unusual sensorineural hearing impairments that involve the eighth cranial nerve (the vestibulocochlear nerve) or the auditory portions of the brain. In the rarest of these sorts of hearing loss, only the auditory centers of the brain are affected. In this situation, cortical deafness, sounds may be heard at normal thresholds, but the quality of the sound perceived is so poor that speech cannot be understood.

Sensory hearing loss is due to poor hair cell function. The hair cells may be abnormal at birth, or damaged during the lifetime of an individual. There are both external causes of damage, like noise trauma and infection, and intrinsic abnormalities, like deafness genes.

Neural hearing loss occurs because of damage to the cochlear nerve (CVIII). This damage may affect the initiation of the nerve impulse in the cochlear nerve or the transmission of the nerve impulse along the nerve. Hearing loss that results from abnormalities of the central auditory system in the brain is called central hearing impairment. Since the auditory pathways cross back and forth on both sides of the brain, deafness from a central cause is unusual.

This type of hearing loss can also be caused by prolonged exposure to very loud noise, for example, being in a loud workplace without hearing protection, or having headphones set to high volumes for a long period.

Questions and answers on "Nerve deafness"

i'm 29 yrs old, suffering from nerve deafness (sinusieroal hearing loss) on left ear. I consulted high qualified in ENT, but told no hope of...

doctor1 MD

Hi Dear,

Welcome to HCM.

Understanding your concern. As per your query you have symptoms of sensorineural hearing loss which could be due to...

Read Full Thread   Ask a Doctor Now

A few days ago I woke up in the early hours of the morning with a sound like cicadas in my ear. It seems to be there 24 hours a day but is mostly...

doctor1 MD

Brief Answer:
Nerve deafness or cold

Detailed Answer:

Thanks for your query.

Most commonly, cold and nasal allergies can give rise to tinnitus...

Read Full Thread   Ask a Doctor Now

I was swabbing a sore spot in my ear with antibiotic ear drops--cortisporin. I have a nerve deafness with 60% loss and I wear hearing aids. I...

doctor1 MD

Brief Answer:
Do visit ER early as may need a small intervention

Detailed Answer:
Hello, I am afraid you may have pushed the tip of ear bud against...

Read Full Thread   Ask a Doctor Now

Recent questions on Nerve deafness

Ask Question
Doctor Image

Hi, I am Dr. Andrew Rynne (Family Physician). I will be guiding you through the process. Please write your question below.

Related Drugs/Medications
Related Treatment/Therapy
Related Lab Tests
Related Medical Topics