Ear and sensation of tongue

Question 1

Fluid filled space in petrous portion of temporal bone. Does hearing and balance

Answer 1

inner ear

Question 2

air filled space in the petrous and tympanic temporal bone. does hearing

Answer 2

middle ear

Question 3

from tympanic temporal bone, continued w/ cartilaginous pieces, does hearing

Answer 3

external ear

Question 4

Contains organs of balance and orientation.

Answer 4

vestibule

Question 5

contains organ of hearing

Answer 5

cochlea

Question 6

Kinocillum

Answer 6

tallest projection and apex of hair cell

Question 7

Stereocilla

Answer 7

array of progressively shorter projections lined next to kilocillum

Question 8

Special sensory cells that alter the rate of stimulation to nerve via bending of projections

Answer 8

hair cell

Question 9

Organs of balance in the vestibule

Answer 9

Maculae, Cristae

Question 10

Maculae

Answer 10

linear acceleration.

Horizontal macula in utricle

Vertical macula in saccule

Question 11

Christae

Answer 11

rotation

in ampulla of each of the three semicircular ducts

Question 12

Hair cell orientation in cochlea

Answer 12

one long ribbon running full length of cochlear duct

Question 13

Organ stimulated by sound waves transmitted from perilymph to endolymph in cochlear duct

Answer 13

Spiral organ. Location of sound wave transfer from perilymph to endolymph depends on frequency

Question 14

Cochlear branch of VIII function

Answer 14

hearing

Question 15

Vestibular branch of VIII function

Answer 15

balance

Question 16

Facial nerve in inner ear:

passageway, branching

Answer 16

IAM between cochlea and vestibule

Forms geniculate ganglion (somatic and taste)

Greater petrosal from genu out hiatus and into medial cranial fossa

Facial continues from genu between inner and middle ear spaces

Question 17

Middle ear nerves

Answer 17

tympanic (CN IX), somatic sensory to middle ear

Tympanic plexus

Lesser petrosal

Question 18

Bony features of middle ear medial wall

Answer 18

oval window (stapes)

round window

promontory

Question 19

Posterior wall of middle ear:

muscle, nerves

Answer 19

stapedius (CN VII)

Chorda tympani (from posterior wall to lateral wall of middle ear. travels between malleus and incus

facial nerve: posterior wall to exit stylomastoid foramen

Question 20

Middle ear lateral wall

Answer 20

tympanic membrane

malleus, incus

Tensor tympany muscle (CNV3)

Chorda tympani - between malleus and incus

Question 21

Tympanic membrane parts

Answer 21

Flaccid part (superior)

Umbo (projection)

Tense part (lateral, surrounds umbo)

Cone of light denotes healthy middle ear

Question 22

Sensory innervation of external ear

Answer 22

Posterior ear: Lesser occipital (cervical plexus)

Helix, antihelix: Great auricular (cervical plexus)

Most of concha and external canal: Auricular branch of CN X

Tympanic membrane: Auricular branch of CN X, auriculotemporal n. (CN V3)

Superior external canal, anterior ear (tragus, anterior helix): Auriculotemporal n. (CN V3)

Small sections of concha: facial n. (CN VII)

Question 23

Sensory and taste to ant 2/3 of tongue

Answer 23

Sens: Lingual n.

Taste: VII via chorda tympani

Question 24

Sensory and taste to post 1/3 of tongue

Answer 24

Glossopharyngeal (CN IX)

Question 25

Taste to root of tongue

Answer 25

Vagus (CN X)