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

Question 1

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

Answer 1

Dorsal (Alar plate)

Ventral (Basal Plate)

Question 2

Nuclei —- to the sulcus limitans are afferent

Answer 2

Dorsal

Question 3

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

Answer 3

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

Question 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

Answer 4

substantia gelatinosa

Question 5

Vestibular nuclei concerned with and located where

Answer 5

body position, pons

Question 6

Cochlear nuclei concerned with

Answer 6

hearing, pons

Question 7

Cranial nerve 1 is sensory, motor, mixed

Answer 7

Sensory only

Question 8

Sensory receptors for CN I reside where

Answer 8

nasal epithelium

Question 9

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

Answer 9

cribiform plate to synapse in olfactory blb

Question 10

Anosmia

Answer 10

no smell

Question 11

Optic nerve is sensory only

Answer 11

ok

Question 12

Where are the sensory receptors for CN II

Answer 12

Back of retina

Question 13

Optic nerve made up of axons of?

Answer 13

Retinal ganglion cells

Question 14

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

Answer 14

Lateral Geniculate Body= the visual thalamus

Question 15

The LGN projects to the primary visual cortex located where

Answer 15

Banks of calcarine fissure in occipital lobe

Question 16

Startle reflex

Answer 16

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

Question 17

Primary nerve for somesthesis in the face

Answer 17

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

Question 18

Know areas of skin served by each root

Answer 18

ok

Question 19

Back of the head is mostly innervated by

Answer 19

C2

Question 20

Chief sensory nucleus receives

Answer 20

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)

Question 21

Proprioceptive afferents from the face have their cell bodies where

Answer 21

Mesencephalic nucleus

Question 22

Spinal nucleus of V

Answer 22

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

Question 23

CN VII sensory components

Answer 23

Taste for anterior 2/3 of tongue

Some fine touch, vibration, pain and temperature around external auditory meatus

Question 24

Nucleus soltarius?

Answer 24

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

Question 25

Gustatory nucleus receives inputs from VII, IX, X

Answer 25

ok

Question 26

Gustatory nucleus receives taste inputs from

Answer 26

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

Question 27

caudal part of nucleus solitarius is what

Answer 27

cardiorespiratory nucleus

Question 28

cardiorespiratory nucleus receives visceral sensory input from

Answer 28

glands, chemoreceptors, baroreceptors

Question 29

vestibulocochlear nerve deos what

Answer 29

Only sensory but has 2 divisions

• Vestibular (balance and acceleration
• auditory

Question 30

Auditory receptors are what

Answer 30

hair cells located in the organ of corti in the cochlea

Question 31

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

Answer 31

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

Question 32

What is tonotopic organization

Answer 32

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

Question 33

Vestibular receptors are also

Answer 33

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

Question 34

Cell bodies of auditory afferents located where

Answer 34

spiral ganglion

Question 35

Nucleus solitarius (solitary nucleus is concerned with?

Answer 35

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

Caudal concerned with cardiorespiratory input- CN IX,X

Question 36

trigeminal lemniscus

Answer 36

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

Question 37

Spinal nucleus of V to the VPM

Answer 37

Trigeminothalamic tract….analogous to the spinothalamic tract

Question 38

Describe the s0omatopic organization of the spinal nucleus of V

Answer 38

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

Question 39

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

Answer 39

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

Question 40

Cell bodies for afferents of fine touch and vibration located where

Answer 40

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

Question 41

Epicritc trigeminal nucleus

Answer 41

Chief sensory

Question 42

Second order neurons from chief sensory travel in what to VPM

Answer 42

Trigeminal mensicus

Question 43

Cell bodies for pain and temp in face synapse where

Answer 43

Spinal nucleus of V