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Sensorineural Hearing loss

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Sensorineural Hearing loss

Sensorineural hearing loss

The most common type of hearing loss is known as sensorineural hearing loss. It is a permanent hearing loss that occurs when there is damage to either the tiny hair-like cells of the inner ear or the auditory nerve itself, which prevents or weakens the transfer of nerve signals to the brain. These blocked nerve signals carry information about the loudness and clarity of sounds.

Sensorineural hearing loss (SNHL) is a type of hearing loss, or deafness, in which the root cause lies in the inner ear or sensory organ (cochlea and associated structures) or the vestibulocochlear nerve (cranial nerve VIII) or neural part.

The most common type of hearing loss is known as sensorineural hearing loss. It is a permanent hearing loss that occurs when there is damage to either the tiny hair-like cells of the inner ear or the auditory nerve itself, which prevents or weakens the transfer of nerve signals to the brain. These blocked nerve signals carry information about the loudness and clarity of sounds.

Causes of Sensorineural hearing loss
If a child is born with sensorineural hearing loss, it is most likely due to a genetic syndrome or an infection passed from mother to fetus inside the womb, such as toxoplasmosis, rubella or herpes. When sensorineural hearing loss develops later in life, it can be caused by a wide variety of triggers, including:

    Deterioration caused by age (presbycusis)
    Blood vessel diseases
    Auto-immune diseases
    Infections such as meningitis, mumps, scarlet fever and measles
    Traumatic injuries
    Extremely loud noises or loud sounds that last for an extended periods of time
    Meniere’s disease
    Acoustic neuroma or other cancerous growths in the inner ear
    A side effect through the use of certain medicines
    Noise exposure

Conductive hearing loss

A less common type of hearing loss is conductive hearing loss, which occurs when there is an obstruction or damage to the outer or middle ear that prevents sound from being conducted to the inner ear. Conductive hearing loss may be temporary or permanent, depending on the cause.
Causes

The causes of conductive hearing loss can be differentiated by which part of the ear they affect – either the outer or middle ear

Sensorineural

Sensorineural

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