PHYL 2041 Lecture Notes - Lecture 7: Vestibulocochlear Nerve, Eustachian Tube, Oval Window
14 Dec 2018
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November 22, 2019: outer, middle and inner ears: The external ear is composed of pinna and cartilage. There is also a muscle that can move the ear. External sounds will enter inside the ear through the auditory canal into the eardrum, which moves the eardrum. Along the eardrum is a chamber that is filled with ear, and it is referred to as the middle ear . Another chamber in the canal that is filled with fluid is the inner ear . Between the tympanic membrane and the middle ear are the stapes, malleus, and incus. Inside the inner ear, is a series of structures cochlea (organ that converts physical movement into electrical stimuli). And the eustachian tube is at the back of the throat: steps in hearing: Pressure waves go in through the external ear and pushes on the 3 little bones (stapes, incus, and malleus) and on the oval window.
