Anatomy & Physiology of the Hearing Mechanism

2 Pages
140 Views
Unlock Document

Department
Communication Sci & Disorders
Course
CSD 212
Professor
Tamayo
Semester
Fall

Description
-Anatomy of the ear -Outer ear: pinna (auricle) to tympanic membrane (eardrum) -Middle ear: tympanic membrane to vestibule -Inner ear: vestibule to cranial nerve VIII (auditory nerve) -Outer ear -Pinna -Composed of skin over cartilage -Concha -- depressed part inside -Helix -- little bony wall thing -Antihelix -- inside of the little bony wall thing -Lobule -- ear lobe -Tragus -- bony bump -External auditory meatus (ear canal) -Long and narrow -Leads to ear drum -Walls of outer 1/2 supported by cartilage -Inner 1/2 bony canal walls -Houses ceruminous glands -Cerumen (ear wax) -Functions of OE -Protects delicate deeper structures -Amplifies high freq. sounds -Aids in localization of sound -Middle ear -Tympanic Membrane (ear drum) -Laterally, continuous w/ skin of canal -Medially, cont. w/ mucosal lining of middle ear -Cone of light -- no fluid behind ear -Ossicles bridge outer & inner ear -Malleus (hammer) -Comes in contanct with TM -Umbo = pt of attachment -Incus (anvil) -Middle ossicle -Stapes (stirrup) -Base (footplate) sits in oval window, sends energy into IE -Eustachian tube -Mucosal lined tupe from nasopharync to base of ME -Opens by yawning, coughing, valsalva (pinch nose and exhale) -Pressure regulation
More Less

Related notes for CSD 212

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit