Lab Ear (exam 4) Flashcards

1
Q

What is the outer region of the ear called?

A

Pinna or auricle and auditory canal

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2
Q

What is the middle region of the ear?

A

Auditory Ossicles (3 bones)

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3
Q

What are the 3 auditory ossicles bones in order and there nicknames?

A

1) malleus- “hammer”- connected to ear drum
2) incus- “Anguil”- looks like a hammer
3) stapes- “stirrup”- connected to vestibule and part of inner ear

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4
Q

What is the cavity of the middle ear called?

A

Tympanic cavity

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5
Q

What is the tube that connects the middle ear to throat?

A

Auditory tube (Eustachian tube)

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6
Q

What does the inner ear do and what does it have?

A

Defects sound, orientation and motion

Has hair cells

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7
Q

What is a vestibular duct (Scala vestibuli)?

A

Transmits vibrations from oral window

Part of cochlea

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8
Q

What is a tympanic duct (scala tympani)?

A

Brings vibrations to round window

Part of cochlea

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9
Q

What is the cochlear duct (scala media)?

A

Surrounds organ of Corti

Part of cochlear

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10
Q

What is the oval window?

A

Fenestea avalis

Goes with vestibular duct

Part of cochlea

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11
Q

What is the round window?

A

Fenestra rotundrum

Goes with tympanic duct

Part of cochlea

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12
Q

What is endolymph?

A

Liquid found in cochlear duct (scala media) and organ of corti

Found in cochlea

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13
Q

What is perilymph?

A

Liquid inside vestibular and tympanic duct

Found in cochlear

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14
Q

What is the organ or corti?

A

Detects sound

Where it crosses over depends on pitch

If crosses high near oval and round window there is a high pitch

The further away the lower the pitch

Part of cochlear

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15
Q

What detects sound?

A

Cochlea- long structure rolled up to fit in skull

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16
Q

What is the basilar membrane?

A

Holds the hair cells

17
Q

What is the tectorial membrane?

A

Overhanging shelf (above hairs)

Touched by hairs

18
Q

What are hair cells?

A

Cells with little hairs

19
Q

What is the auditory nerve and vestibulocochlear nerve?

A

Detects sound, orientation and motion

Yellow nerve in cochlear (part you have to open in ear model)

Blue thing on big board (not the vessel looking things)

20
Q

What is cochlear problem type of deafness?

A

Sensorineural

21
Q

What is ossicle bone problem type of deafness?

A

Conduction

Can be fixed

22
Q

What is the path of sound waves?

A

Vibration in atmosphere—-> vibration in tympanic membrane——> vibration in ossicle bones—-> oval window—-> perilymph of vestibular duct (scala vestibuli)—-> passes through cochlear duct (scala media) contains endolymph—-> stimulates organ of corti
END OF SOUND

vibration has to leave through tympanic duct (scala tympani) and discharge are round window

23
Q

What does the vestibule detect?

A

Orientation

Linear acceleration- going faster and faster in a straight line

24
Q

What is the main body of the inner ear?

25
What are the 3 parts of the vestibule and explain each
1) maculae- hair cells inside structures 2) cupula- over hair cells (gelatin material) 3) otoliths- little stones in cupulas gelatin material
26
What detects turning motion?
Semicircular canals
27
What is the thickened part of the semicircular canal called?
Ampulla
28
What is the pinna or auricle?
Ear you see
29
What is the auditory canal called?
External auditory canal
30
What produces ear wax?
Ceruminous glands
31
What is the ear drum called?
Tympanic membrane