Sensorineural deafness is decreased hearing or hearing loss that occurs from damage to the inner ear, the nerve that runs from the ear to the brain (auditory nerve), or the brain.
Sensorineural deafness can be present at birth (congenital), or it can develop later in life (acquired) as a result of:
Disease of the blood vessels (vascular disease)
Use of certain medicines
In some cases, the cause is unknown.