Related topics from Britannicaear disease
Chronic infection of the middle ear occurs when there is a permanent perforation of the tympanic membrane that allows dust, water, and germs from the outer air to gain access to the middle-ear ...
ear disease
The air-filled middle-ear cavity and the air cells in the mastoid bone that extend backward from it are supplied with air by the eustachian tube that extends from the upper part of the pharynx to the ...
ear disease
Labyrinthitis, an inflammation of the labyrinth of the inner ear, happens when infection occurs as a result of meningitis, syphilis, acute otitis media and mastoiditis, or chronic otitis media and ...
labyrinthitis
inflammation, either acute or chronic, of the inner ear (the labyrinth). It is often a complication of a respiratory-tract infection, of syphilis, or of inflammation of the middle ear. Symptoms ...
ear disease
The ossicular chain of three tiny bones needed to carry sound vibrations from the tympanic membrane to the fluid that fills the inner ear may be disrupted by infection or by a jarring blow on the ...
mastoiditis
inflammation of the mastoid process, a projection of the temporal bone just behind the ear. Mastoiditis, which primarily affects children, usually results from an infection of the middle ear (otitis ...
nervous system disease
When both divisions of the vestibulocochlear nerve are affected by disease, symptoms may include ringing in the ear (tinnitus), a sensation of spinning (vertigo), and other symptoms such as deafness. ...
sensory reception, human
The inner ear contains parts (the nonauditory labyrinth or vestibular organ) that are sensitive to acceleration in space, rotation, and orientation in the gravitational field. Rotation is signaled by ...
Life Sciences
Optimal human hearing requires not only proper structure and function of the outer, middle, and inner ears but also proper reception and interpretation of the electrical signals sent along the ...
ear disease
Congenital nerve deafness, a defect of the auditory nerve in the cochlea, may be present at birth or acquired during or soon after birth. Usually both inner ears are affected to a similar degree, and ...
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