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Flashcards in neuro hearing and scent Deck (21):
1

3 pathways of the inner ear

scala vestibuli
scala media
scala tympani

2

what type of fluid is in each of the scalas

scala media: endolymph
scala vestibuli: paralymph
scala vestibuli: paralymph

3

what seperates the scala media from the scala vestibuli? what about the scala tympani?

vestibuli: vestibular membrane
tympani: basilar membrane

4

what are the contents of the scala media?

neural epithelium
organ of corti
supporting cells
hair cells
gelatinous pectorial membrane

5

what are the functions of the dorsal and ventral cochlear nuclei?

dorsal does the majority of auditory processing
ventral does the majority of localization

6

where is the primary auditory nucleus

it's on the temporal lobe on the superior temporal gyrus and represented by the transverse gyri of hessel deep inside the lateral fissure

7

vestibular portion of the ear can be divided into what two parts?

static labyrinth (utricle and saccule)
dynamic labyrinth (semicircular canals)

8

the labyrinth is filled with _____ which is continuous with that of the ___________

endolymph
scala media/cochlea

9

the _____ is the neural epithelium of the dynamic labyrinth and the _______ is the neural epithelium of the static labyrinth

crista ampularis - dynamic
macula - static

10

what's another name for the macula of the static labyrinth?

otolith organ

11

contents of macula of the static labyrinth

sensory cells
support cells
gelatinous substance
calcium carbonate otoconia (stones)
assymetrical cilia (coming off sensory cells

12

what does the macula of the static labyrinth sense?

linear acceleration (gravity)

13

what does to crista ampularis consist of?

support cells
asymmetrical hair cells
cupula (gelatinous substance

14

what is the function of the cupula?

blocks the passage of fluid in the semicircular canal and deflects to sense angular motion

15

how do we sense angular motion?

we move our heads but the fluid in the dynamic portion of our ear stays still causing the cupula to deflect.

16

______ cells in the olfactory epithelium give rise to ________, which have odor receptors, and centrally directed axons that make up the _______

bipolar
peripherally directed dendrites
olfactory nerve

17

axons from the olfactory bipolar cell synapse with dendrites of the ______ which is unique to the ________

mitral cell
olfactory bulb

18

path of scent:

received by the bipolar n.
sent to mitral n. in olfactory bulb
sent to primary olfactory cortex in the piriform lobe

19

where is the primary olfactory cortex

piriform lobe

20

what are the three components of the piriform lobe

cortex overlying the amygdala
uncus
rostral portion of the entorhinal cortex

21

sensory bodies of origin for CN V that inn extracted tooth

trigeminal gasserion/semilunar ganglion