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Mastoid Cells
(redirected from Mastoid air cells)

    Also found in: Medical, Wikipedia 0.01 sec.
Mastoid Cells 

air-filled sacs of the floor and external walls of the tympanic cavity in most mammals. They are formed of tympanic bone, an angular bone homologous to the lower jaw in reptiles. Primitive mastoid cells protect the auditory ossicles and tympanic cavity. Increasing complication of the mastoid cells converts them into acoustic resonators or absorbers. Four types of eardrums are distinguished: spherical, chambered, large-cellular, and spongy-small-cellular. The functions of each type are determined by the acoustic properties of the animals’ habitat and characteristics of their orientation.

G. N. SIMKIN
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Minimal mucosal irregularity within mastoid air cells may be associated with nonseptic lateral sinus thrombosis.
Nonseptic lateral sinus thrombosis: the role of the otolaryngologist by Viswanatha, Borlingegowda / Ear, Nose and Throat Journal
A transverse fracture through the external ear and mastoid air cells was present.
Post-traumatic cholesteatoma ... a rare occurrence by Naidoo, Logeshini; Nanan, A. / South African Journal of Radiology
Mastoiditis is usually a result of an extension of the inflammation of the middle ear infection into the mastoid air cells.
Information on Mastoiditis by Richard James / Health, general community
 
 
 
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