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

1
Q

What two cranial nerves arise from the cerebrum?

A

CN I- olfactory (smell)

CN II- optic (vision)

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2
Q

What two cranial nerves arise from the midbrain?

A

CN III- oculomotor

CN IV- trochlear

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3
Q

What 4 cranial nerves arise from the pons?

A

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

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4
Q

What 3 cranial nerves arise from the medulla ?

A

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

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5
Q

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

A

CN XI - spinal accessory nerve

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6
Q

What are the three structures that make up the brainstem?

A

midbrain, pons, medulla

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7
Q

What 4 cranial nerves provide parasympathetic innervation?

A

CN III - oculomotor

CN VII- facial

CN IX- glossopharyngeal

CN X- vagus

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8
Q

What 3 cranial nerves only provide sensory innervation?

A

I- olfactory
II-optic
VIII- vestibulocochlear

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9
Q

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

A

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

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10
Q

Axon functions of CN I - Olfactory

A

sensory (smell)

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11
Q

Axon functions of CN II, optic

A

sensory (vision)

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12
Q

Axon functions of CN III, oculomotor

A

motor, preganglionic parasympathetic

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13
Q

Axon functions of CN IV- trochlear

A

motor

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14
Q

Axon functions of CN V- trigeminal

A

sensory, branchial motor (mandibular division)

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15
Q

Axon functions - CN VI, abducens

A

motor

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16
Q

Axon functions - CN VII, facial

A

sensory, taste, branchial motor, preganglionic parasympathetic

17
Q

Axon functions- CN VIII- vestibulocochlear

A

sensory (hearing, equilibrium)

18
Q

Axon functions - CN IX- glossopharyngeal

A

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

19
Q

Axon functions - CN X- vagus nerve

A

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

20
Q

Axon functions- XI - accessory nerve

A

motor (spinal accessory nucleus of C1-5)

21
Q

Axon functions of hypoglossal nerve (CN XII)

A

motor

22
Q

Cells of origin of the olfactory nerve CN I

A

nasal mucosa

23
Q

Cells of origin of CN II - Optic nerve

A

ganglion cells retina

24
Q

Cells of origin- CN III- oculomotor

A

oculomotor nucleus (motor origin)

accessory oculomotor nucleus (preganglionic parasympathetic origin)

25
Q

Cells of origin- trochlear - CN IV

A

trochlear nucleus (posterior, contralateral)

26
Q

cells of origin - trigeminal, ophthalmic, CN V1

A

trigeminal ganglion (superior portion)

27
Q

cells of origin- trigeminal, maxillary- CN V2

A

Trigeminal ganglion (middle portion)

28
Q

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

A

sensory- trigeminal ganglion

branchial motor- trigeminal motor nucleus in the pons

29
Q

CN VI- abducens- cells of origin

A

abducens nucleus located in the pons

30
Q

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

A

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)

31
Q

CN IX- glossopharyngeal - cells of origin

A

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

32
Q

CN X- vagus n. - cells of origin

A

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

33
Q

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

A

CN IX - glossopharyngeal n.

CN X - vagus n.

34
Q

CN XI- spinal accessory nerve- cells of origin

A

CNS level origin- spinal cord C1-C5

CELLS OF ORIGIN- ventral horn (motor) - C1-5

35
Q

CN XII- hypoglossal n.- cells of origin

A

hypoglossal nucleus in the medulla