Audiology Topic 3 (part1)
Audiology Topic 3 (part1) C D 422 M02
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This 3 page Class Notes was uploaded by NMSU Zamora on Wednesday August 31, 2016. The Class Notes belongs to C D 422 M02 at New Mexico State University taught by Mishra in Fall 2016. Since its upload, it has received 15 views. For similar materials see Audiology in Communication Sciences and Disorders at New Mexico State University.
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Date Created: 08/31/16
Audiology Topic 3(part1)- Anatomy and Physiology Highlight = important, highlight = Going to be on the test Main Structures of the outer ear 1.Outer Ear = Auricle a.Crus of antihelix b.Helix c.Tubercle d.Scaphoid fossa e.Antitragus f.Tragus g.Lobule h.Intertragic notch i.Concha j.Triangular fossa k.Crus of helix 2.EAC = External Auditory Canal (ear canal) Tympanic Membrane = Ear Drum Middle Ear- Ossicles The 3 bones in the ear 1.Malleus- largest of the 3, visible through ear canal, connected to ear drum 2.Incus- in the middle of the 3 bones 3.Stapes- connects to incus, SMALLEST bone in the human body Middle Ear Muscles 1.Tensor tympani- connects to malleus and stimulated by the cranial nerve V (trigeminal nerve) 2.Stapedius muscle- smallest muscle in the human body, stimulated by cranial nerve VII (facial nerve) Eustachian Tube Responsible for equalizing air pressure Angles differ from young to adult age Opened by veli palatini Connects middle ear and nasopharynx Inner Ear- Cochlea Responsible for balance "Snail" shaped Wraps around modiolus Filled with 2 different fluids
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