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19 Cards in this Set
- Front
- Back
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External/Outer Ear |
Collects and directs sound into the auditory canal |
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Middle Ear |
Mechanisms to relay sound waves |
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Inner Ear |
Sound is processed and balance is maintained |
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Auricle/Pinna |
Fleshy outer portion that collects and directs sound into the auditory canal |
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Auditory Canal |
Passageway for sound waves |
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Ceruminous Glands |
Produce cerumen / earwax, which entraps incoming debris |
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Tympanic Membrane |
A thin membrane that vibrates in response to sound waves |
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Oval Window |
Prompted by the domino effect of the auditory ossicles, its movements set the fluids of the inner ear into motion, eventually impacting the hearing receptors. As the stapes vibrate the oval window, the perilymph sloshes back and forth, vibrating the round window in a complementary rhythm. The auditory hair cells sit within the organ of Corti. |
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Round Window |
Serves as pressure value to release the energy of "used" vibrations |
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Eustachian Tube |
Passageway that links the middle ear and the throat. Normally, this tube is closed, but swallowing or yawning can open it, equalizing the pressure |
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Auditory Ossicles |
Three tiny bones that move in a domino effect when prompted by the tympanic membrane. They are the only bones that never grow larger from the time of birth. |
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Malleus |
The first outermost ossicle and also known as the hammer |
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Incus |
The second ossicle and also known as the anvil |
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Stapes |
The innermost ossicle and also known as the stirrup |
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Cochlea |
Spiral "snail shell" where the sound in the form of vibrations cause the stereocilia inside to move. The specific movement is the converted by the Organ of Corti into nerve impulses which the brain then interrupts |
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Vestibule |
The "hallway" between the Cochlea and Semicircular canals |
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Vestibular Nerve |
Transmission of rotation, acceleration, and spinning |
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Cochlear Nerve |
Transmission of sound to the brain to be recognized |
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Auditory Nerve |
Single nerve created by the joining of the cochlear nerve and vestibular nerve. It leads to the brain where the information will be processed. |
