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Anatomical aspects of middle ear system
In order to
understand the nature of these diseases I will dwell briefly on the
anatomical aspect of the middle ear system. The middle ear per se
is an add air filled cavity in the temporal bone, bound on the
outer aspect by the paper thin ear drum and communicates with the Nasopharynx (the region behind the nasal cavity and above the soft
palate) through a bony-cartilagenous tube called Eustachian Tube (ET).
This tube is responsible for aerating the middle ear and clearing
mucus from the middle ear.
The middle ear also communicates with several air cells in the temporal bone known as mastoid air cells. The Eustachian tube, middle ear, and the mastoid air cells are collectively known as the ‘middle ear system.’ The temporal lobe of the brain is separated from this system by a thin shelf of bone known as the ‘Dural Plate’ and the inner ear lies on its inner aspect.
