Ear

Front 1

Bones that as levers to magnify sound energy

Back 1

Auditory ossicles (malleus, incus, stapes)

Front 2

Snail shaped fluid filled chamber containing sensory cells

Back 2

Cochlea

Front 3

Tube to equalize air pressure across ear drum

Back 3

Eustachian canal aka pharyngotympanic aka auditory tube

Front 4

Funnel sound waves directly to ear drum

Back 4

Auditory canal

Front 5

Transfer point where sound energy changes from mechanical to hydraulic

Back 5

oval window

Front 6

Funnel sound waves from environment into head

Back 6

pinna aka auricle

Front 7

relieve pressure in fluid chamber

Back 7

round window

Front 8

fluid filler chambers to detect head rotation

Back 8

semicircular canals

Front 9

muscles that stiffens ear drum to protect from loud sounds

Back 9

Tensor Tympani

Front 10

Outer membrane that vibrates as a result of sound waves

Back 10

tympanic membrane

Front 11

Nerve that carries sound and balance information to the brain

Back 11

vestibulocolear nerve

Front 12

What lobe of the brain is auditory information carried too?

Back 12

Temporal

Front 13

What is the pathway of noise?

Back 13

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

Front 14

Explain why your ear hurts in the airplane and how the pain is relieved.

Back 14

The pressure in the ear canal drops when taking off in airplane. When you swallow the Eustachian tube briefly lets in air relieving pressure.

Front 15

Function of Auricle.

Back 15

Captures sound waves

Front 16

What fills the tympanic cavity?

Back 16

Air unless there is an infection then it fills with fluid and causes pressure on the middle ear causing pain.

Front 17

2 muscles in the ear and their attachment points

Back 17

Stapedius attaches to stapes and the Tensor tympani attaches to malleus

Front 18

Function of muscles in ear.

Back 18

If loud hard sound comes in ear the muscles tense so that the bones will not vibrate to hard and cause damage

Front 19

What is the Pharyngotympanic (auditory) tube?

Back 19

Opens the equalize pressure between the middle and outer ear, connects middle ear to pharynx

Front 20

What is the bony labyrinth?

Back 20

Channels running through the temporal lobe

Front 21

What is the fluid in the bony labyrinth called?

Back 21

Perilymph

Front 22

What is the fluid in the membranous labyrinth called?

Back 22

Endolymph

Front 23

What is the function and location of Maculae.

Back 23

Equalibrum receptors in the saccule and utricle (Bony labyrinth) that respond to the pull of gravity and report on changes of head position.

Front 24

What detects a change in head position?

Back 24

Maculae and semicircular canals

Front 25

Why must we sit after spinning?

Back 25

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

Front 26

What fluid is inside scala vestibule and scala tympani?

Back 26

Perilymph (part of bony labyrinth)

Front 27

What fluid is inside the scala media?

Back 27

Endolymph (part of membranous labyrinth)

Front 28

What are the scala's? (vestibule, media, tympani)

Back 28

Ducts

Front 29

What is the spiral organ of corti?

Back 29

contains the nerve cells that convert and transmit the sound

Front 30

Where does the Vestibulochlear originate and where does it run through?

Back 30

Originates at the semicircular canals and runs through the cochlea

Front 31

What is the purpose of the round window?

Back 31

To stop the sound waves