SPHHRNG 2230 Lecture Notes - Lecture 3: Barotrauma, Stapedius Muscle, Sternum
4 Sep 2016
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Anatomy & physiology of the auditory system: the middle ear. Connected to the nasopharynx via the eustachian tube. Paper-thin plate of bone that separates the middle ear from the brain. Separates the tympanic cavity from the jugular fossa (vein) Thin plate of bone that separates the me from the carotid artery. Perforated by the tensor tympani and the opening of the eustachian. Formed by dense portion of temporal bone that houses the inner ear. Landmarks include: promontory, round window & oval window (play a role in transmitting the sound to the middle ear) Formed by the temporal bone (e. g. , mastoid process) Ossicular chain, or ossicles (transmits the sound) 3 small bones that transmit sound from the tm to the inner ear: malleus, manubrium of malleus is embedded in the fibrous portion of the tm. 2: stapes, stapes footplate attaches to the inner ear at the oval window.
