Landmarks of Auditory System

Landmarks of Auditory System - The Auditory System...

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The Auditory System Peripheral Auditory System o Outer Ear o Middle Ear o Inner Ear Central Auditory System o Auditory Nerve o Brainstem Pinna—you can see it, it gathers sound Cochlea—hearing mechanism Vestibular—balance system Tympanic—usually involved in conductive hearing loss (bc middle ear) Pinna Landmarks: Helix: top of the ear Antihelix- underneath that Tragus- little triangular part Antitragus- bigger triangular part Concha- bowl of ear Crus/x of helix- (ridge) Scassoid fossa- groove under helix Triangular fossa- Tympanic Membrane (barrier) 1 st energy transformation 3 layers (skin outside, skin inside, fibrous layer) Manubrium—whitish line Umbo—bottom of manubrium Cone of light—below and in front (inferior and anterior) Pars flaccida—2 layers of skin back to back Malleolar folds—anterior and posterior Lateral malleolar process when malleolar folds come together Middle Ear: Ossicles—ossicle train Malleus—first and largest bone—9 mm long
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This note was uploaded on 04/08/2008 for the course SPHR 108 taught by Professor Cossettini during the Spring '08 term at GWU.

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Landmarks of Auditory System - The Auditory System...

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