Sudden deafness

What is Sudden 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 "Sudden deafness"

Hi, I am a 44 yr old female. For the past two days I have been having dizzy spells, ringing in my right ear with a little pain and sudden deafness...

doctor1 MD

HI, thanks for using healthcare magic

The combination of dizziness, ringing in your ear and hearing loss sounds as though it may be related to...

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28 year old female, no significant PMH, no DH. Awoke today with sudden acute deafness of right ear. Saw local GP who syringed my ear, small amount...

doctor1 MD

Hello and welcome to HCM,

You seem to be suffering from a condition called sudden hearing loss (whichc can be conductive or sensorineural) and...

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My name is Fred Roethof. living in the Netherlands.

As of a couple of weeks I’m confronted with Sudden deafness (left ear) in...

doctor1 MD

Dear patient.
Greetings from health care magic!!! I am Dr Thakker and shall be answering your question.

I can understand your concerns about the...

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