the ear

Question 1

what is the exernal ear

Answer 1

auricle, external acoustic meatus up until the tympanic membrane

Question 2

the outermost pat of ear

Answer 2

helix

Question 3

inner raised area of the ear

Answer 3

antihelix

Question 4

traiangular shape thing that covers ear hole

Answer 4

tragus

Question 5

the oposite triangle shape thing of the ear

Answer 5

antitragus

Question 6

the ear lobe

Answer 6

the ear lobule

Question 7

parts of the extneral ear canal

Answer 7

cartilaginous, fatty, and bony portions

Question 8

what makes up the tympanic membrane

Answer 8

the 1st pharyngeal pouch and cleft

Question 9

what muscle gives tension to ear drum

Answer 9

tensor tympani

Question 10

innervation of tensor tympani m

Answer 10

CN V3 (1st pharyngeal arch derivative)

Question 11

what attaches to the tympanic membrane

Answer 11

the handle of the malleus (manubrium)

Question 12

folds of the tympanic membrane

Answer 12

posterior and anterior mallear fold

Question 13

roll of tympanic membrane

Answer 13

allows for tension to be placed on the membrane

Question 14

part of tympanic membrane that reflects light under normal circumstances

Answer 14

cone of light

Question 15

wear do ear infections occure

Answer 15

middle ear

swimmers ear is external ear

Question 16

the air space within the temporal bone

Answer 16

tympanic cavity

Question 17

roll of the tympanic cavity

Answer 17

serves as a relay center for sound waves

Question 18

the 2 continuous regions of the tympanic cavity

Answer 18

tympanic cavity proper: medial to tympanic membrane

Epitympanic recess: superior to tympanic membrane

Question 19

the opening to the mastoid air cells

Answer 19

aditus

Question 20

where the tensor vellatini attaches on the auditory tube

Answer 20

on the anterior membranous portion of the tube

Question 21

the boney roof of the middle ear

Answer 21

tegmen tympani

Question 22

the floor of the middle ear

Answer 22

jugular wall

Question 23

what forms the floor of the middle ear

Answer 23

thin plate of tympanic portion of the temporal bone

Question 24

what does the jugular wall (floor of the middle ear separate)

Answer 24

middle ear cavity from the jugular fossa

Question 25

what does the jugular fossa contain

Answer 25

the jugular bulb of the IJV

Question 26

what does tensor tympani attach to

Answer 26

the manubrium of the maleus

Question 27

what oscicles articulate with each other

Answer 27

tymapnic membrane: maleus-incus-stapes

Question 28

what stablies the oscicles

Answer 28

ligaments

Question 29

what bones doe the choda tympani pass between

Answer 29

between the maleus and the incus

Question 30

the protuberance foacing the tympanic membrane of the meidal wall of the tympanic cavity

Answer 30

promontory

Question 31

the oval window that receives the base of the stapes

Answer 31

Fenestra vestibuli

Question 32

the round window covered in membrane locatated inferior to the oval

Answer 32

Fenestra

Question 33

what is found on the meidal wall of the tympanic cavity

Answer 33

``` promontory Fenestra vestibuli= oval window Fenestra Cochlea= round window Facial canal prominece Lateral semicirculat canal prominence tendon of the tensor tympani m ```

Question 34

what overlyes the promontory of the meidal wall

Answer 34

a plexus of the tympanic nerve

Question 35

what does the plexus of the tympanic that lies over the promontory contribures to autonomics that supply

Answer 35

the parotid gland

Question 36

the anterior wall of the middle ear

Answer 36

carotid wall

Question 37

the carotid wall of the middle ear is formed by

Answer 37

a thin plate of tympanic portion of the temporal bone

Question 38

what does the carotid wall of th anterior middle ear seaprate

Answer 38

middle ear caivty from the carotid canal

Question 39

what 2 openings are found on the superior aspect of the carotid wall

Answer 39

auditory tube | semicanal for tensor tympani

Question 40

the posterior wall of the middle ear

Answer 40

mastoid wall

Question 41

features of the mastoid wall (posterior) of the middle ear

Answer 41

pyramidal eminence | aditus ad antrum

Question 42

the hollow projuection of bone serving as the origin of the stapedius m

Answer 42

pyramidal eminence

Question 43

the enterance to the tympanic antrum

Answer 43

aditus ad antrum

Question 44

what does the aditus ad antrum lead into

Answer 44

leads to posterior inferior into the mastoid air cells

Question 45

what innervates the stapedius muscle

Answer 45

CN VII (pharyngeal arch 2)

Question 46

what attahces to the pars tensa of the tympanic membrane

Answer 46

the handle of the malleus

Question 47

what part of the malleus articulates with the incus

Answer 47

the head of the malleus

Question 48

middle ear muscle

Answer 48

tensor tympani m | stapedius m

Question 49

roll of middle ear muscle

Answer 49

reduce oscillations of ossicles | protect inner ear from injury during loud noises

Question 50

arterial supply to the middle ear

Answer 50

vympanic branches of carotid arteries and its brnaches (anterior tympanic(maxilllary/external carotid), inferior tympanic, superior tympanic, stylomastoid, and caroticotympanic aa(internal coarotid))

Question 51

what does the middle ear drain to

Answer 51

to superior petrosal sinus or pterygoid plexus

Question 52

what anastomoses in the middle ear

Answer 52

internal and external carotid arteries

Question 53

innervation of the middle ear

Answer 53

CN VII (Facial nerve)

Question 54

travel of CN VII (Facial nerve) to the middle ear

Answer 54

enters facial canal and runs posteriorly travels in medial wall of middle ear passes over oval window and turns inferior passes behind the round window continues inferior inferiorly to exit at the stylomastoid foramen

Question 55

how the facial nerves enters the skull

Answer 55

internal acoustic meatus

Question 56

the greater petrosal nerve caries what fibers

Answer 56

parasympa fibers to pterygopalatine ganglion

Question 57

the greater petrosal nerve brnaches from

Answer 57

geniculate ganglion of CN VII

Question 58

what does the greater petrosal nerve join

Answer 58

joins the deep petrosal nerve (sympa) to form the nerve of the pterygoid canal

Question 59

travel of the greater petrosal nerve

Answer 59

from hiatus of greater petrosal nerve to pterygoid canal | from petrous temporal toaward foramen lacerum

Question 60

where is the tympanic plexus of nerves found

Answer 60

under the mucosal linging of the promontory in the middle ear

Question 61

what does the tympanic plexus of nerves supply

Answer 61

the mastoid air cells and auditory tube

Question 62

what forms the tympanic plexus of nn

Answer 62

``` formed by tympanic branches of CN IX (parasympa) cartoticotympanic nn ( Sympa) ```

Question 63

the lesser petrosal nerve is a branch of

Answer 63

tympanic plexus from CN IX as a continuation of tympanic brnach of CN IX

Question 64

the lesser petrosal nerves caries what

Answer 64

parasympa fibers to otic ganglion to supply to parotid gland

Question 65

travel of the lesser petrosal nerve

Answer 65

from hiatus of lesser petrosal n to foramen ovale

Question 66

where is the otic gnaglion in relation to foramen ovale

Answer 66

below foramen ovale

Question 67

para sympa ganglion to the head

Answer 67

ciliary pterygopalatine submandibular otic

Question 68

where is the cochlea of the internal ear

Answer 68

more medial than the rest of the inner ear

Question 69

roll of the semicircular canals

Answer 69

sense balance and position

Question 70

roll of cochlea

Answer 70

senses hearing

Question 71

the location of the oval window

Answer 71

behinning of cochlea (to receive stapes)

Question 72

location of the round window

Answer 72

end of cochlea(closed by membrane)

Question 73

relation of the saccule and the utricle

Answer 73

utricle is more dorsal

Question 74

location of the cochlear nerve

Answer 74

inside the spiral of cochlea

Question 75

travel of sound

Answer 75

``` enter oval window scala vestibuli helicotrema scala tympani round window ```