Ménière's disease International Classification for Vestibular Disorders Committee of the Barany Society published consensus diagnostic criteria in collaboration with the American Academy of Otolaryngology – Head and Neck Surgery, the European Academy of Otology & Neuro-Otology, the Japan Society for Equilibrium Research, and the Korean Balance Society. Ménière's disease Ménière's disease (MD) is a disorder of the inner ear that is characterized by episodes of feeling like the world is spinning (vertigo), ringing in the ears (tinnitus), hearing loss, and a fullness in the ear. Typically only one ear is affected, at least initially; however, over time both ears may become involved.
Inner ear top of the head, and in some teleosts, it is simply blind-ending. In all other species, however, it ends in an endolymphatic sac. In many reptiles, fish, and amphibians this sac may reach considerable size. In amphibians the sacs from either side may fuse into a single structure, which often extends down the length of the body, parallel with the spinal canal. The primitive lampreys and hagfish, however, have a simpler system. The inner ear in these species consists of a single vestibular chamber, although in lampreys, this is associated with a series of sacs lined by cilia. Lampreys have