Auditory sys

Question 1

name the tube that goes from middle ear to nasopharanyx

Answer 1

eustachian tube

Question 2

symptoms of a perforated eardrum

Answer 2

pain, ringing, hearing loss, dizziness

Question 3

which labrinyth is filled woth perilymph

Answer 3

bony

Question 4

which labryrinth is filled with endolymph

Answer 4

membranous

Question 5

what fluid is perilymph similar to

Answer 5

extra cellular (high sodium)

xtra salty!

Question 6

what fluid is endolymph similar to

Answer 6

intacellular (high potassium)

Question 7

which window does the scala vestibuli end at

Answer 7

oval

Question 8

which window does the scale tympani end at

Answer 8

round

just rember that r and t are near eachother in the alphabet

Question 9

what type of lymph fills the scala vestibuli and scala tympani

Answer 9

peri

Question 10

where abouts is the scala media and what kind of lymph fills it

Answer 10

cochlear duct

endo

Question 11

how many rows of hair cells are there in the organ of corti

Answer 11

4 all up

3 outer
1inner

Question 12

name the 3 ossicles in the correct order

Answer 12

malleus, incus, stapes

Question 13

does the stapes push against the oval window or round windo

Answer 13

oval

Question 14

which membrane pulls on the hair cells when it vibrates

Answer 14

basillar

Question 15

where are the 1st order neurons of the auditory system located

Answer 15

cochelar - organ of corti

Question 16

where are the 2nd order neurons of the auditory system located

do they have ipsi or bi projections

Answer 16

brain stem

bilateral projection

Question 17

where are the 3rd order neurons of the auditory system

located

Answer 17

medial geniculate nuclues to primary auditory cortex

fibres form internal capsule

Question 18

what would be the result of a unilateral leision of the ascending auditory pathway

Answer 18

would NOT cause monaural deafness b/c the auditory pathways decussate and both sides of the brain recieve input from both ears

Question 19

does the vestibule apparatus monitor static or dynamic equilbrium

Answer 19

static

Question 20

is it the saccule or utricle that is horizonatally oritented and therefore detects accereleration in horizontal plane

Answer 20

utricle

Question 21

name the equilibrium receptors in the saccule and utricle

Answer 21

maculae (contain hair cells)

Question 22

role of the semi-circular canals

Answer 22

dynamic equilibrium: monitor rotational or angualr acceleration of the head

Question 23

what plane of motion does the anterior semi canal detect

Answer 23

saggital/vertical

“summersalting forward”

Question 24

which plane does the lateral semi canal detect

Answer 24

horizontal/transverse

- sticking leg out laterally for a pirroutte

Question 25

name the region in the semi corcular canals that houses the equilibrium receptors

Answer 25

ampulia

which is within a bigger region called: cristia ampularis

Question 26

where are the otoliths/otolith membrane located

Answer 26

in the vestibule apparatus

Question 27

name the longest hair cell in the vestibule apparatus

Answer 27

kinocilum

others are kinocilia

Question 28

what cranial nerves recieve input from thr vestibular nucleues

Answer 28

3,4,6!!

Question 29

name the two types of motor nuerons that the vestibulespinal tract synapes on

Answer 29

cervical motor nuerons: control head movements

extensor motor nuerons: change muscle tone of trunk and limbs

Question 30

why does the vestibular nucelus project to the cerebellum

Answer 30

coordination of movements

Question 31

why does the vestibular nuclues project to the cortex

Answer 31

conscious perception of vestibular info

Question 32

why does the vestibular nucelus project to the hypothalamus

Answer 32

perception of discomfort

Question 33

why does the bestibular nucelus project to the reticular formation

Answer 33

fast flick component of the optickinetic hystamus

Question 34

name the gelatinous membrane found in the cochelar

Answer 34

tectorial membrane

Question 35

name the gelatinous material found in the semi canals

Answer 35

capula (no stones)