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31 Cards in this Set

  • Front
  • Back
Bones that as levers to magnify sound energy
Auditory ossicles (malleus, incus, stapes)
Snail shaped fluid filled chamber containing sensory cells
Tube to equalize air pressure across ear drum
Eustachian canal aka pharyngotympanic aka auditory tube
Funnel sound waves directly to ear drum
Auditory canal
Transfer point where sound energy changes from mechanical to hydraulic
oval window
Funnel sound waves from environment into head
pinna aka auricle
relieve pressure in fluid chamber
round window
fluid filler chambers to detect head rotation
semicircular canals
muscles that stiffens ear drum to protect from loud sounds
Tensor Tympani
Outer membrane that vibrates as a result of sound waves
tympanic membrane
Nerve that carries sound and balance information to the brain
vestibulocolear nerve
What lobe of the brain is auditory information carried too?
What is the pathway of noise?
Pinna, auditory canal, tympanic membrane, malleus, incus, stapes, oval window, scala vestibuli, scala media, spirial organ of corti, basilar membrane, cochlear nerve, vestibulochlear nerve, temporal lobe
Explain why your ear hurts in the airplane and how the pain is relieved.
The pressure in the ear canal drops when taking off in airplane. When you swallow the Eustachian tube briefly lets in air relieving pressure.
Function of Auricle.
Captures sound waves
What fills the tympanic cavity?
Air unless there is an infection then it fills with fluid and causes pressure on the middle ear causing pain.
2 muscles in the ear and their attachment points
Stapedius attaches to stapes and the Tensor tympani attaches to malleus
Function of muscles in ear.
If loud hard sound comes in ear the muscles tense so that the bones will not vibrate to hard and cause damage
What is the Pharyngotympanic (auditory) tube?
Opens the equalize pressure between the middle and outer ear, connects middle ear to pharynx
What is the bony labyrinth?
Channels running through the temporal lobe
What is the fluid in the bony labyrinth called?
What is the fluid in the membranous labyrinth called?
What is the function and location of Maculae.
Equalibrum receptors in the saccule and utricle (Bony labyrinth) that respond to the pull of gravity and report on changes of head position.
What detects a change in head position?
Maculae and semicircular canals
Why must we sit after spinning?
When we spin the fluid in semicircular canals spins and cannot detect where out head position is. When we stop the fluid keeps spinning and we have to sit and wait for it to settle down so we can gain focus of where our head is
What fluid is inside scala vestibule and scala tympani?
Perilymph (part of bony labyrinth)
What fluid is inside the scala media?
Endolymph (part of membranous labyrinth)
What are the scala's? (vestibule, media, tympani)
What is the spiral organ of corti?
contains the nerve cells that convert and transmit the sound
Where does the Vestibulochlear originate and where does it run through?
Originates at the semicircular canals and runs through the cochlea
What is the purpose of the round window?
To stop the sound waves