Hearing loss in Meneire’s disease is of what type?
**Core Concept**
Ménière's disease is a disorder of the inner ear that affects balance and hearing. It is characterized by a triad of symptoms: vertigo, tinnitus, and hearing loss. The hearing loss in Ménière's disease is typically sensorineural, affecting the cochlear nerve.
**Why the Correct Answer is Right**
The hearing loss in Ménière's disease is sensorineural due to damage to the hair cells in the cochlea. The vestibulocochlear nerve, which transmits sound and balance information from the inner ear to the brain, is also affected. This results in a loss of sound sensitivity, especially in the lower frequency range. The exact cause of the damage to the hair cells is not fully understood, but it is thought to be related to abnormalities in the endolymphatic fluid of the inner ear.
**Why Each Wrong Option is Incorrect**
**Option A:** Conductive hearing loss is caused by problems with the middle ear, such as a perforated eardrum or a blockage in the ear canal. This is not typical of Ménière's disease.
**Option B:** Mixed hearing loss is a combination of conductive and sensorineural hearing loss. While Ménière's disease can cause some mixed hearing loss, it is not the primary type of hearing loss associated with the condition.
**Option C:** Central hearing loss is caused by damage to the auditory pathways in the brain. Ménière's disease affects the inner ear and the vestibulocochlear nerve, not the auditory pathways in the brain.
**Clinical Pearl / High-Yield Fact**
Ménière's disease often presents with a characteristic "tullio phenomenon," in which loud noises trigger vertigo and hearing loss. This is a key clinical feature that can help diagnose the condition.
**Correct Answer: C. Sensorineural.**