CN I, II, V, VII, VIII, IX, X Flashcards Preview

Clinical Neuroscience weeks 1-3 > CN I, II, V, VII, VIII, IX, X > Flashcards

Flashcards in CN I, II, V, VII, VIII, IX, X Deck (43):
1

Early in development, the neural tube is split into two plates...they are

Dorsal (Alar plate)
Ventral (Basal Plate)

2

Nuclei ---- to the sulcus limitans are afferent

Dorsal

3

What are the names of the three nuclei for the sensory aspect of the trigeminal

Chief Sensory Nucleus (middle), Mesencephalic nucleus (rostral), Spinal nucleus (caudal)

4

Spinal nucleus extends as a column from the mesencephalon to the spinal cord where it is continuous with what part of the spinal cord

substantia gelatinosa

5

Vestibular nuclei concerned with and located where

body position, pons

6

Cochlear nuclei concerned with

hearing, pons

7

Cranial nerve 1 is sensory, motor, mixed

Sensory only

8

Sensory receptors for CN I reside where

nasal epithelium

9

Sensory receptors for CN I send very fine axons called filae through what plate to synapse where

cribiform plate to synapse in olfactory blb

10

Anosmia

no smell

11

Optic nerve is sensory only

ok

12

Where are the sensory receptors for CN II

Back of retina

13

Optic nerve made up of axons of?

Retinal ganglion cells

14

Optic tract, formed once optic nerves converge, runs to the LGN which is...

Lateral Geniculate Body= the visual thalamus

15

The LGN projects to the primary visual cortex located where

Banks of calcarine fissure in occipital lobe

16

Startle reflex

Nerves bypass the LGN and instead travel in an arm of the superior colliculus to synapse in the superior colliculus

17

Primary nerve for somesthesis in the face

Trigeminal- carry fine touch, proprioception, pain, temperature, from skin of face

18

Know areas of skin served by each root

ok

19

Back of the head is mostly innervated by

C2

20

Chief sensory nucleus receives

epicritic inputs from afferents for fine touch and vibration sense. Also receives some epicritic input from CN VII, IX, X

Epicritic afferents in the trigeminal nerve have their cell bodies where? Trigeminal ganglion (analogous to the dorsal root ganglion of the spinal cord)

21

Proprioceptive afferents from the face have their cell bodies where

Mesencephalic nucleus

22

Spinal nucleus of V

extends from mesencephalon to the spinal cord where it becomes continuous with the substantia gelatinosa. Receives pain and temp afferents from the face that run in CN V as well as VII, IX, X. These pain and temp afferents have their cell nuclei in the trigeminal ganglion

What connects teh chief sensory nucleus of V to the VPM....

Trigeminal lemniscus

23

CN VII sensory components

Taste for anterior 2/3 of tongue
Some fine touch, vibration, pain and temperature around external auditory meatus

24

Nucleus soltarius?

Runs as a column through the pons and medulla, rostral portions are also called gustatory nucleus and are concerned with taste sensation. Revceives input from VII, IX, X

25

Gustatory nucleus receives inputs from VII, IX, X

ok

26

Gustatory nucleus receives taste inputs from

VII- anterior 2/3 of tongue
IX- posterior 1/3
X- pharynx

27

caudal part of nucleus solitarius is what

cardiorespiratory nucleus

28

cardiorespiratory nucleus receives visceral sensory input from

glands, chemoreceptors, baroreceptors

29

vestibulocochlear nerve deos what

Only sensory but has 2 divisions
- Vestibular (balance and acceleration
- auditory

30

Auditory receptors are what

hair cells located in the organ of corti in the cochlea

31

hair cells in the organ of corti are sensitive to what?

airborne pressure waves that are transduced into fluid waves in the cochlea

32

What is tonotopic organization

depending on location in the cochlea, these receptors are tuned to different frequencies of sound

33

Vestibular receptors are also

Hair cells...located in saccule, utricle, and semicircular canals

34

Cell bodies of auditory afferents located where

spiral ganglion

35

Nucleus solitarius (solitary nucleus is concerned with?

rostral part is concerned with taste- CN VII, IX, X
Caudal concerned with cardiorespiratory input- CN IX,X

36

trigeminal lemniscus

runs from chief sensory nucleus of V to the VPM...analogous to the medial lemniscus for spinal pathways

37

Spinal nucleus of V to the VPM

Trigeminothalamic tract....analogous to the spinothalamic tract

38

Describe the s0omatopic organization of the spinal nucleus of V

Pain and temperature afferents travelling in the spinal nucleus of V travel with fibers from VII, IX, and X most dorsal, then V3, v2, and v1 in dorsal to ventral order

39

Cell bodies of proprioceptive afferents from muscles of mastication are located where

mesencephalic nucleus....these cells project bilaterally to the trigeminal motor nucleus to mediate monosynaptic stretch reflex of the jaw

40

Cell bodies for afferents of fine touch and vibration located where

trigeminal ganglion (V), geniculate VII, etc...all outside brainstem

41

Epicritc trigeminal nucleus

Chief sensory

42

Second order neurons from chief sensory travel in what to VPM

Trigeminal mensicus

43

Cell bodies for pain and temp in face synapse where

Spinal nucleus of V