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Anatomy Exam 3 Blue Boxes > Cranial Nerve Facts > Flashcards

Cranial Nerve Facts Flashcards

1
Q

what are the components of CN III?

A

somatic motor and visceral motor

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2
Q

where are the cell bodies of CN III?

A

-somatic: midbrain
-visceral: presynaptic –> midbrain
postsynaptic –> ciliary ganglion

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3
Q

where does CN III exit the cranium?

A

superior orbital fissure

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4
Q

what is the motor function for CN III?

A
  • innervates superior, inferior, and medial recti
  • innervates inferior oblique
  • innervates levator palpebrae superioris
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5
Q

what is the sensory innervation for CN III?

A

parasympathetic to sphincter pupillae and ciliary muscles that constricts pupil

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6
Q

what components does CN IV have?

A

somatic motor

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7
Q

where are the cell bodies for CN IV?

A

midbrain

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8
Q

where does CN VI exit the skull?

A

superior orbital fissure

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9
Q

what is the function of CN IV?

A

motor to superior oblique

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10
Q

what are the branches of CN V?

A
  • ophthalmic (V1)
  • maxillary (V2)
  • mandibular (V3)
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11
Q

what are the components of CN V?

A
  • somatic sensory (V1,2, &3)

- special motor (V3 only)

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12
Q

where are the cell bodies for CN V?

A
  • somatic sensory: trigeminal ganglion

- special motor: pons

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13
Q

where does CN V1 exit the skull?

A

superior orbital fissure

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14
Q

where does CN V2 exit the skull?

A

foramen rotundum

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15
Q

where does CN V3 exit the skull?

A

foramen ovale

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16
Q

what is the function of CN V1?

A

sensation from cornea, skin of forehead, scalp, eyelids, nose, mucosa of nasal cavity, and paranasal sinuses

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17
Q

what is the function of CN V2?

A

sensation from skin of face over maxilla, upper lip, maxillary teeth, mucosa of nose, maxillary sinuses, & palate

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18
Q

what is the function of CN V3?

A
  • sensory: skin over mandible, lower lip, mandibular teeth, temporomandibular joint, mucosa of mouth and anterior 2/3 of tongue
  • motor: muscles of mastication, mylohyoid, anterior belly of digastric, tensor veli palatini, and tensor tympani
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19
Q

what are the components of CN VI?

A

somatic motor

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20
Q

where are the cell bodies for CN VI?

A

pons

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21
Q

where does CN VI exit the skull?

A

superior orbital fissure

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22
Q

what is the function of CN VI?

A

motor to lateral rectus

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23
Q

what are the components of CN VII?

A
  • somatic motor
  • special sensory
  • visceral motor
24
Q

where are the cell bodies for CN VII?

A

-somatic motor: pons
-special sensory: geniculate ganglion
-visceral motor: presynaptic –> pons
postsynaptic –>pterygopalatine ganglion & submandibular ganglion

25
Q

where does CN VII exit the skull?

A

internal acoustic meatus –> facial canal –> stylomastoid foramen

26
Q

what are the somatic motor functions of CN VII?

A

-somatic motor: muscles of facial expression and scalp, stapedius muscle of inner ear, stylohyoid, & posterior belly of digastric

27
Q

what is the special sensory function of CN VII?

A

-special sensory: taste from anterior 2/3 of tongue and palate

28
Q

what are the visceral motor functions of CN VII?

A

-visceral motor: parasympathetic of submandibular and sublingual salivary glands, lacrimal gland, and glands of nose and palate

29
Q

what are the branches of CN VIII?

A
  • vestibular

- cochlear

30
Q

what are the components of CN VIII?

A

special sensory

31
Q

where are the cell bodies of CN VIII?

A
  • vestibular: vestibular ganglion

- cochlear: spiral ganglion

32
Q

where does CN VIII exit the skull?

A

internal acoustic meatus

33
Q

what are the functions of CN VIII?

A

vestibular sensations from semicircular ducts, utricle, and saccule (position of head)

34
Q

what are the components of CN IX?

A
  • somatic motor
  • visceral motor
  • visceral sensory
  • special sensory
  • somatic sensory
35
Q

where are the cell bodies for CN IX?

A
  • somatic motor: medulla
  • visceral motor: medulla (pre) & otic ganglion (post)
  • visceral sensory: superior ganglion
  • special/somatic sensory: inferior ganglion
36
Q

where does CN IX exit the skull?

A

jugular foramen

37
Q

what is the somatic motor function of CN IX?

A

motor to stylopharyngeus (swallowing)

38
Q

what is the visceral motor function of CN IX?

A

parasympathetic to parotid gland

39
Q

what is the visceral sensory function of CN IX?

A

visceral sensation from parotid gland, carotid body and sinus, pharynx, & middle ear

40
Q

what is the special sensory function of CN IX?

A

taste from posterior 1/3 of tongue

41
Q

what is the somatic sensory function of CN IX?

A

cutaneous sensation from external ear

42
Q

what are the components of CN X?

A

ALL 5

43
Q

where are the cell bodies of CN X?

A
  • SM: medulla
  • VM: medulla (pre) & near viscera (post)
  • VS: inferior ganglion
  • SpS: inferior ganglion
  • SS: superior ganglion
44
Q

where does CN X exit the skull?

A

jugular foramen

45
Q

what is the SM function of CN X?

A

motor to muscles of pharynx, intrinsic muscles of larynx, palate, & striated muscle in superior 2/3 of esophagus

46
Q

what is the VM function of CN X?

A

parasympathetic to smooth muscle and glands of trachea, bronchi, digestive tract, coronary arteries, and heart nodes

47
Q

what is the VS function of CN X?

A

visceral sensation from base of tongue, pharynx, larynx, trachea, bronchi, heart, esophagus, stomach, and intestine until splenic flexure

48
Q

what is the SpS function of CN X?

A

taste from epiglottis and palate

49
Q

what is the SS function of CN X?

A

sensation from auricle, external acoustic meatus, dura mater of posterior cranial fossa

50
Q

what is the component of CN XI?

A

somatic motor

51
Q

where are the cell bodies of CN XI?

A

spinal cord

52
Q

where does CN XI exit the skull?

A

jugular foramen

53
Q

what is the function of CN XI?

A

motor to sternocleidomastoid and trapezius

54
Q

what component does CN XII have?

A

somatic motor

55
Q

where are the cell bodies for CN XII?

A

medulla

56
Q

where does CN XII exit the skull?

A

hypoglossal canal

57
Q

what is the function of CN XII?

A

motor to intrinsic and extrinsic muscles of tongue except palatoglossus

Anatomy Exam 3 Blue Boxes (12 decks)

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