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Anatomy II Unit 3 > Ear-Gross > Flashcards

Ear-Gross Flashcards

1
Q

air space within the temporal bone (about 10x10x6 mm); serves as relay center for sound waves

A

tympanic cavity (middle ear cavity)

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2
Q

2 regions of the tympanic cavity

A

tympanic cavity proper

epitympanic recess

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3
Q

epitympanic recess is continuous with the ____ or doorway into the mastoid antrum and air cells

A

aditus

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4
Q

middle ear cavity is also continuous anteriorly with the _____, which opens up into the ____

A

auditory tube; nasopharynx

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5
Q

anterior 2/3 of the auditory tube is ____ and posterior 1/3 is ____

A

cartilaginous; bony (osseous)

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6
Q

only ____ and ___ walls of the auditory tube are cartilaginous

A

superior; medial

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7
Q

___ and ____ walls of the auditory tube are membranous

A

inferior; lateral

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8
Q

____ m. (soft palate m.) runs along long axis of the auditory tube

A

levator veli palatini

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9
Q

____ m. is at 90 degree angle to auditory tube and attaches to both cartilaginous and membranous portions

A

tensor veli palatini

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10
Q

roof of the middle ear cavity

A

tegmen tympani

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11
Q

formed by thin plate of tympanic portion of the temporal bone; separates the middle ear cavity from the jugular fossa

A

jugular wall (floor) of the middle ear cavity

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12
Q

the jugular fossa contains the ____ of the internal jugular vein

A

superior jugular bulb

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13
Q

protuberance facing tympanic membrane; on the medial wall of the middle ear cavity

A

promontory

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14
Q

____ (oval window) receives the base of the ____

A

fenestra vestibuli; stapes

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15
Q

_____ (round window) is membrane covered and inferior to oval

A

fenestra cochlea

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16
Q

formed by thin plate of tympanic portion of temporal bone; separates middle ear cavity from carotid canal

A

carotid wall (anterior) of the middle ear cavity

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17
Q

2 openings in the superior aspect of the carotid wall (anterior wall)

A
  • auditory tube

- semicanal for tensor tympani m.

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18
Q

the carotid canal is ____ and ____ to the jugular foramen

A

anterior; medial

19
Q

the posterior wall of the middle ear cavity is called the _____

A

mastoid wall

20
Q

hollow projection of bone on the mastoid wall

A

pyramidal eminence

21
Q

the pyramidal eminence serves as origin of ____ m.

A

stapedius

22
Q

entrance to the tympanic antrum, on the mastoid wall

A

aditus ad antrum

23
Q

aditus ad antrum leads ____ into mastoid air cells

A

posteriorly/inferiorly

24
Q

the ___ of the malleus is attached to the tympanic membrane

A

handle

25
Q

the ____ of the incus articulates with the stapes and the base of the stapes is attached to the ____

A

long limb; oval window

26
Q

the ossicles are lined with mucosal membrane which is _____ epithelium

A

simple squamous

27
Q

mm. associated with the middle ear

A

tensor tympani m.

stapedius m.

28
Q

tensor tympani m. is attached to the ____ and stapedius is attached to _____

A

manubrium of the malleus; neck of the stapes

29
Q

tensor tympani is innervated by ___ and stapedius is innervated by ____

A

CN V3; CN VII

30
Q

stapedius arises from cavity inside ____ and inserts into ____; pulls the head of stapes ____

A

pyramidal eminence; neck of stapes; posteriorly

31
Q

tensor tympani is contained in bony semicanal, ____ to auditory tube; tenses tympanic membrane by drawing it _____

A

superior; medially

32
Q

arterial supply of the middle ear via ____ branches of _____ branches

A

tympanic; carotid

33
Q

veins drain to ____ or _____

A

superior petrosal sinus; pterygoid plexus

34
Q

____ n. passes between malleus and incus

A

chorda tympani

35
Q

branch off geniculate ganglion of CN VII; carries presynaptic parasymp. fibers to pterygopalatine ganglion

A

greater petrosal n.

36
Q

tympanic plexus supplies ___ and ____

A

mastoid air cells; auditory tube

37
Q

tympanic plexus formed by ____ and _____

A

tympanic branch of CN IX (parasympathetic); caroticotympanic nn. (sympathetic)

38
Q

continuation of tympanic branch of CN IX; branch of tympanic plexus from CN IX

A

lesser petrosal n.

39
Q

lesser petrosal n. carries ____ fibers to the ____ to supply the ____

A

preganglionic parasympathetic; otic ganglion; parotid gland

40
Q

lesser petrosal n. runs from ____ to ____

A

hiatus of lesser petrosal n. ; foramen ovale

41
Q

part of internal ear that controls balance and position

A

semicircular canals

42
Q

part of internal ear that controls hearing

A

cochlea

43
Q

the oval window is the ____ of the cochlea that receives the ____

A

beginning; stapes

44
Q

the round window is the ___ of the cochlea that is closed by a membrane

A

end

Anatomy II Unit 3 (6 decks)

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