Which portion of the ear is affected by Meniere's syndrome?

Meniere's syndrome primarily affects the inner ear. This condition is characterized by a buildup of fluid in the inner ear, specifically in the labyrinth, which is responsible for hearing and balance. The fluid accumulation can lead to episodes of vertigo, tinnitus (ringing in the ears), hearing loss, and a sensation of fullness in the ear.

The inner ear contains crucial structures such as the cochlea, which is essential for hearing, and the vestibular system, which helps control balance. Disruption in this area due to Meniere's syndrome results in the typical symptoms associated with the disorder.

In contrast, the middle ear, which includes the eardrum and ossicles (the small bones), does not play a role in Meniere's syndrome. The Eustachian tube connects the middle ear to the throat and regulates air pressure but is also not directly involved in this condition. The auditory ossicles, which consist of the malleus, incus, and stapes, transmit sound vibrations from the eardrum to the inner ear. Since Meniere's syndrome originates in the inner ear, it is specifically this portion that is affected by the syndrome's pathology.