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maris ga 2 > ear quick study > Flashcards

ear quick study Flashcards

(74 cards)

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1
Q

blood supply to auricle

A

superficial temporal, posterior auricular, occipital

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2
Q

nerve supply to auricle 5

A

great auricular n, auriculo-temporal, lesser occipital, auricular branch of vagus, facial (motor to auricular mucles)

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3
Q

external acoustic meatus lat 1/3 is what and medial 2/3 is what

A

lat 1/2 is cartilage

med 2/3 is bony

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4
Q

blood supply to external acoustic meatus

A

posterior auricular (branch of eca), deep auricular (branch of max), auricular branch of superficial temp a

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5
Q

nerve to external acoustic meatus 2

A

auriculotemporal nerve of V3, and auricular branch of vagus

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6
Q

central depression of tympanic membrane called

A

umbo

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7
Q

cone of light radiates

A

anteroinferiorly

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8
Q

where find cone of light for diff ears

A

right ear: 5 o clock

left ear: 7

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9
Q

what find in anterior superior of tymp membrane

A

anterior malleolar fold and parts of pars flaccida

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10
Q

what find in posterior superior of tymp memb

A

posterior malleolar fold and parts of pars flaccida

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11
Q

what find anterior inferior tymp membe

A

cone of light

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12
Q

what find post inf tymp memb

A

safest site for paracentesis: drain

myringotomy: put tube in ear

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13
Q

blood to tymp memb

A 
deep auricular (branch of max): external surface
internal: stylomastoid branch of post aur a and tympanic branch of max
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14
Q

nerve to tymp mem

A

externally: auriculotemporal nerve and auricular branch of vagus
internally: glossopharyngeal n

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15
Q

the middle ear/tymp cavity communicates with the nasopharynx through the

A

auditory tube

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16
Q

the middle ear/tmp cav communicates with mastoid air cells and mastoid antrum though the

A

aditus

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17
Q

roof of middle ear

A

tegmen tympani

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18
Q

floor of middle ear

A

roof of jugular fossa

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19
Q

anterior wall middle ear

A

incomplete wall, 2 openings: auditory tube and tensor tympani muscle

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20
Q

posterior wall middle ear

A

mastoid wall that has aditus,

opening of facial canal, and pyramid process in it

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21
Q

medial wall of middle ear is also the

A

lateral wall of the inner ear

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22
Q

whats in medial wall of mid ear

A

promontory
oval window
round window

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23
Q

oval window aka

A

fenestra vestibuli

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24
Q

round window aka

A

fenestra cochleae

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25
lateral wall mid ear
tympanic membrane
26
what is the function of the pyramid process
attachment for stapedius muscle
27
facial nerve enters petreous portion of temp bone through the () and exits facial canal through the ()
internal acoustic meatus stylomastoid foramen
28
if you have a lesion of facial nerve b/f it enters auditory meatus s&s intracranial
paralysis of muscles of facial expression hyperacusis (cause of paralysis of stapedius muscle) loss of taste of anterior 2/3 of tongue: hypoageusia
29
if lesion of facial nerve after stylomatoid foramen see what extracranial
paralysis of muscles of facial expression
30
incus-mallear jt is a () jt
saddle
31
incus stapes jt is a () jt
ball and socket jt
32
nerve to tensory tympani muscle
nerve to medial pterygoid
33
action of tensor tympani
draws tympanic membrane medially increasing its tension thus lessening sound transmission
34
stapedius muscle nerve
facial nerve
35
action of stapedius
damps down vibratiosn by pulling the head of stapes posteriorly (protective mechanism)
36
how long is auditory tube/pharygotympanic/eustachian
3.5-4cm long
37
function of auditory tube
equalize pressure on both sides
38
what do if in plane and try to equalize pressure
as go up atmosphere pressure goes down so yawn or chew gum cause our pressure in ear is higher
39
when go scuba do what to eqaulise pressure
blow nose
40
herpes zoster auticus affects what
opthlamic divison of trigeminal or auricuotemporal so get lesions on face or ear
41
where is inner ear
petrous portionof temporal bone
42
what is suspended in the bony labrinth
membranous labryinth
43
what is the membranouse labyrinth fileld with
endolymph
44
what separates the membranous from the bony labyrinth
perilymph
45
what is bony labyrinth made of
cochlea, vestibule semicircular canals
46
what is the membranous labyrinth made of
utricle, saccule, semicircular ducts (in canals) and cochlear duct (in cochlea)
47
what is in the vestibule
utricle and saccule
48
what contains the sensory e.t cells for hearing
organ of corti/spiral organ
49
how many turns does cochlea make
2 1/2
50
the bony core of cochlea
modiolus
51
modiolus contains
spiral gangli
52
the thread of bone around modiolus
osseous spiral lamina
53
what divides the cochlea into 3 division
basilar and vestibular membranes
54
what are the 3 divisions of the cochlea
upper: scala vestibule lower: sacala tympani middle: coclear duct
55
what are both the scala vestibule and tympani filled wtih
perilymph
56
the scala vest and tymp connect at the apex through the ()
helicotrema
57
the scala vest ends at the () and the scala tymp ends at ()
oval window (closed by stapes base) tymp: round window closed by 2nd tymp membrane
58
cochlear duct is filled wtih
endolymph
59
what is ontop of basilar membrane
organ of corti
60
what is on top of organ of corti
tectorial membrane
61
what is imbedded in tectorial emmbrane
cilia (hair)
62
what forms cochlear nere
axons of the bipolar nerve cells from organ of corti
63
the vestibule is contiunsous anteriorly by the () and posteriorly by the () and posterior cranial fossa through the ()
cochlea post: semicircular canals fossa : aquadeuct of vestibule
64
spot of modified sensory e.t. in utricle called
macula utriculi
65
spot of modified sensory e.t in saccule
macula sacculi
66
otoliths
calcium crystals for when go up and down bend cilia to get action potential
67
function of macula sacculi and utriculi and innervation of htem
detect acceleration and deceleration, static equilibrium and head in space vestibular division of cranial 8 vestibulocochlear
68
sensory organ found in ampulla of circular ducts
crista ampullaris (innervated nerve 8)
69
function of cristae
kinetic equilibrium, and rotational acceleratioand nd deceleration
70
what passes through internal acoustic meatus
facial, vestibulocochlear internal acoustic a. (branch of basilar)
71
where is primary auditory cortext
superior temporal gyrus
72
conductive deafness
problem from outer ear to ossicles (like artirist of bones or blockage from earwax)
73
presbycusis
loss of hearing secondary to old age
74
sensory neural deafness
damage of spiral oran

maris ga 2 (8 decks)

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