PSY E111 Lecture Notes - Lecture 20: Ossicles, Stapes, Habituation
Document Summary
The outer ear channels sound waves into the tube like auditory canal. Structures of the outer and middle ear gather/focus sound waves. Receptors for hearing are hair cells in the cochlea. The external part of you ear is called the pinna. Auditory canal: carries sound into the ear drum. Eardrum: junction between the middle and the inner ear. Tympanic membrane: the sound waves are going to hit the ear drum, so the eardrum to vibrate - vibrates in response to sound waves. Attached to the tympanic membrane, the first bone that you are going to see if the malleus, the next bone that is attached to the malleus is called the incus, and the third little bone is called stapes. These 3 bones are filled with air. When you get an ear infection, liquid fills this area, which does not allow these tiny bones to move. Sound waves cause the tympanic membrane (ear drum) to vibrate.
