CNs- CNS Origin/Nuclei/Axons/Cells of Origin

Question 1

What two cranial nerves arise from the cerebrum?

Answer 1

CN I- olfactory (smell)

CN II- optic (vision)

Question 2

What two cranial nerves arise from the midbrain?

Answer 2

CN III- oculomotor

CN IV- trochlear

Question 3

What 4 cranial nerves arise from the pons?

Answer 3

CN V - trigeminal
CN VI - abducens
CN VII - facial
CN VIII -vestibulocochlear (hearing, equilibrium)

Question 4

What 3 cranial nerves arise from the medulla ?

Answer 4

CN IX - glossopharyngeal
CN X - vagus
CN XII - hypoglossal

Question 5

What is the only cranial nerve that arises from the spinal cord?

Answer 5

CN XI - spinal accessory nerve

Question 6

What are the three structures that make up the brainstem?

Answer 6

midbrain, pons, medulla

Question 7

What 4 cranial nerves provide parasympathetic innervation?

Answer 7

CN III - oculomotor

CN VII- facial

CN IX- glossopharyngeal

CN X- vagus

Question 8

What 3 cranial nerves only provide sensory innervation?

Answer 8

I- olfactory
II-optic
VIII- vestibulocochlear

Question 9

What 3 cranial nerves provide sensory, motor, and parasympathetic innervation?

Answer 9

CN VII - facial
CN IX- glossopharyngeal
CN X- vagus

Question 10

Axon functions of CN I - Olfactory

Answer 10

sensory (smell)

Question 11

Axon functions of CN II, optic

Answer 11

sensory (vision)

Question 12

Axon functions of CN III, oculomotor

Answer 12

motor, preganglionic parasympathetic

Question 13

Axon functions of CN IV- trochlear

Answer 13

motor

Question 14

Axon functions of CN V- trigeminal

Answer 14

sensory, branchial motor (mandibular division)

Question 15

Axon functions - CN VI, abducens

Answer 15

motor

Question 16

Axon functions - CN VII, facial

Answer 16

sensory, taste, branchial motor, preganglionic parasympathetic

Question 17

Axon functions- CN VIII- vestibulocochlear

Answer 17

sensory (hearing, equilibrium)

Question 18

Axon functions - CN IX- glossopharyngeal

Answer 18

somatic sensory, visceral sensory, preganglionic parasympathetic, taste, branchial motor

Question 19

Axon functions - CN X- vagus nerve

Answer 19

somatic sensory, visceral sensory, preganglionic parasympathetic, taste, branchial motor

Question 20

Axon functions- XI - accessory nerve

Answer 20

motor (spinal accessory nucleus of C1-5)

Question 21

Axon functions of hypoglossal nerve (CN XII)

Answer 21

motor

Question 22

Cells of origin of the olfactory nerve CN I

Answer 22

nasal mucosa

Question 23

Cells of origin of CN II - Optic nerve

Answer 23

ganglion cells retina

Question 24

Cells of origin- CN III- oculomotor

Answer 24

oculomotor nucleus (motor origin)

accessory oculomotor nucleus (preganglionic parasympathetic origin)

Question 25

Cells of origin- trochlear - CN IV

Answer 25

trochlear nucleus (posterior, contralateral)

Question 26

cells of origin - trigeminal, ophthalmic, CN V1

Answer 26

trigeminal ganglion (superior portion)

Question 27

cells of origin- trigeminal, maxillary- CN V2

Answer 27

Trigeminal ganglion (middle portion)

Question 28

CN V3- Trigeminal, mandibular n. - cells of origin

Answer 28

sensory- trigeminal ganglion | branchial motor- trigeminal motor nucleus in the pons

Question 29

CN VI- abducens- cells of origin

Answer 29

abducens nucleus located in the pons

Question 30

What are the 3 different cells of origin for the branchial motor, parasympathetic, taste, and sensory axons of the facial nerve?

Answer 30

branchial motor- facial motor nucleus in the pons preganglionic parasympathetic origin- superior salivatory nucleus geniculate ganglion - for sensory and taste axons (have axons that go back to the pons but the cell bodies are located in the geniculate ganglion)

Question 31

CN IX- glossopharyngeal - cells of origin

Answer 31

branchial motor -nucleus ambiguuus in the medulla preganglionic parasympathetic -inferior salivatory nucleus in medulla (different than superior salivatory nucleus in the pons (facial nerve)) sensory- touch/proprioception - inferior ganglion sensory- visceral -superior ganglion Taste -inferior ganglion

Question 32

CN X- vagus n. - cells of origin

Answer 32

branchial motor --nucleus ambiguus in the medulla sensory- touch/prop --inferior ganglion sensory-visceral --superior ganglion preganglionic parasympathetic- --dorsal motor nucleus in the medulla TASTE --inferior ganglion

Question 33

What two cranial nerves have their branchial motor axons arising from the nucleus ambiguus in the medulla?

Answer 33

CN IX - glossopharyngeal n. | CN X - vagus n.

Question 34

CN XI- spinal accessory nerve- cells of origin

Answer 34

CNS level origin- spinal cord C1-C5 | CELLS OF ORIGIN- ventral horn (motor) - C1-5

Question 35

CN XII- hypoglossal n.- cells of origin

Answer 35

hypoglossal nucleus in the medulla