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Flashcards in Intro to Cranial Nerves Deck (77):
1

general afferent fibers

sensory
have cell bodies in either dorsal root ganglia or nuclei/ganglia of specific cranial nerves

2

GSA

general somatic afferent

exteroreceptive impulses - pain temp touch
-from epithelium of ectodermal origin

proprioceptive impulses - tendons, joints

3

epithelium of ectodermal origin

all skin
ling of external ear
tympanic membrane
conjuctiva covering palebral surface of eye
lining of external nares
nasal cavity
paranasal sinuses
lining of mouth
anterior 2/3 of tongue
dura mater

4

GVA

general visceral afferent

sensory impulses - pain
-from visceral structures of endoderm origin

5

visceral structures of endoderm origin

posterior third of tongue
ducts of parotid gland
carotid sinus
pharynx
pharyngotympanic tube and middle ear
bronchial tree
larynx
esophagus
gut
pancreaticohepatic duct
lining of genitourinary tract

6

tongue innervation

anterior 2/3 GSA
posterior 1/3 GVA

7

blood vessel innervation

mesoderm derivative

still supplied by visceral afferents

8

special afferent fibers

only in cranial nerves

9

SSA

special somatic afferent

vision, hearing, equilibrium

ear and eye

10

SVA

special visceral afferent

olfactory and gustation

named visceral - because of functional association with the GI tract

11

general efferent fibers

motor fibers to muscles of body

except branchiomeric muscles

12

branchiomeric muscles

develop from pharyngeal arches

not somites

innervation is SVE

muscles of mastication, facial expression, pharynx, palate, larynx

13

GSE

general somatic efferent

motor impulses to somatic skeletal muscle

14

GVE

general visceral efferent

autonomics to smooth muscle in gut tube, blood vessels, cardiac muscle, glandular secretion

subdivided - S and PS and found in spinal and some cranial nerves

15

special efferent fibers

cranial nerves
innervate specialized area of skeletal muscle

16

SVE

special visceral efferent

skeletal muscles derived from pharyngeal arch mesoderm

NO autonomics

17

SSE

special somatic efferent

reflexively influence sensory input to ear

18

CN I

olfactory nerve
SVA

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olfactory nerve

CN I SVA
sense of smell

20

destination of CN I

to olfactory striae
lateral - piriform cortex in anterior temoral lobe
medial - through anterior commisure to contralateral olfactory structures

21

CN II

optic nerve
SSA

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optic nerve

CN II SSA
afferent fibers of retina - sense of sight

23

destination of CN II

medial fibers decussate and join lateral fibers of opposite side

terminate at lateral geniculate bodies of thalamus
-hen to occipital lobe

24

CN III

oculomotor nerve
GSE, GVE-P

25

oculomotor nerve GSE component

motor to extra-ocular muscles of eye
-rotational movement
-4 of 6 - superior, medial, inferior recti, inferior oblique AND superior eyelid

26

oculomotor nerve GVE-P component

parasympathetic to intra-ocular muscles
-change shape of lense for accomodation
-narrowing pupil

via inferior division of CN III (ciliary ganglion)

27

inferior division of CN III

oculomotor nerve GVE-P component

ciliary ganglion

28

CN IV

trochlear nerve
GSE

29

trochlear nerve

CN IV GSE
innervation of one of extraocular eye muscle
-superior oblique (utilizes pulley)

30

innervation of extraocular muscles of eye

CN III - superior, medial, inferior recti, inferior oblique
CN IV - superior oblique
CN VI - lateral rectus

31

CN V

trigeminal nerve
GSA and SVE

32

GSA of trigeminal nerve

major sensory nerve of head
-scalp, face, conjuctiva, nasal cavity, paranasal sinuses, oral cavity, outer ear, external auditory meatus, tympanic membrane, dura mater

all proprioceptive to head muscles

33

proprioception of all head muscles

GSA of trigeminal nerve

34

SVE of trigeminal nerve

motor to muscles of pharyngeal arch
-specifically first arch
-mastication, mylohyoid, anterior belly digastric, tensor veli palatini, tensor tympanic muscles

35

carried on trigeminal nerve

GVE-P of CN III, VII, and IX (3, 7, 9)

smooth muscles of eye, glands of head (both mucous and salivary)

36

CN VI

abducens
GSE

37

abducens nerve

CN VI GSE

innervates extra-ocular eye muscle - lateral rectus

38

CN VII

facial nerve
SVE, GSA, SVA, GVA, GVE-P

39

facial nerve

CN VII

40

sensory roots of trigeminal

V1 - opthalmic
V2 - maxillary
V3 - mandibular

41

motor root of trigeminal

distributed via mandibular (V3)

to first pharyngeal arch muscles

42

SVE of facial nerve

motor to skeletal muscles of second arch
-facial expression, stylohyoid, posterior belly of digastric, stapedius

43

GSA of facial nerve

sensory to portion of skin of external ear and external auditory meatus

44

SVA of facial nerve

taste - anterior 2/3 of tongue via chorda tympani

45

GVA of facial nerve

sensory to upper pharynx

46

GVE-P of facial nerve

parasympathetic to lacrimal gland, nasal, palatal, oral, pharyngeal mucous glands, submandibular and siblingual salivary glands

47

distribution of facial GVE-P to lacrimal, nasal, palatal, oral, pharyngeal mucous glands

-greater pertosal nerve
-pterygopalatine ganglion

48

distribution of facial GVE-P to submandibular and sublingual glands

chorda tympani
submandibular ganglion

49

CN VIII

vestibulocochlear nerve
SSA SSE

50

vestibulocochlear nerve

CN VIII
SSA SSE

51

SSA of vestibulocochlear nerve

afferent - organ of corti (hearing)
afferent - semicircular canals, utricle, saccule (EQ)

52

SSE of vestibulocochlear nerve

motor fibers modifying auditory input

53

CN IX

glossopharyngeal nerve
SVE, GSA, SVA, GVA, GVE-P

54

SVE of glossopharyngeal nerve

motor to third pharyngeal arch - stylopharyngeus

55

GSA of glossopharyngeal nerve

sensory to portion of skin of external ear

56

SVA of glossopharyngeal nerve

taste from posterior third of tongue

57

GVA of glossopharyngeal nerve

sensory to epithelium of endoderm origin
-pharynx, middle ear, internal tympanic membrane, tonsils, posterior tongue, parotid gland, carotid sinus

58

GVE-P of glossopharyngeal nerve

secretory fibers to parotid salivary gland

via lesser petrosal nerve and otic ganglion

59

CN X

vagus nerve
SVE, GSA, SVA, GVA, GVE-P

60

vagus nerve

CN X

61

SVE of vagus nerve

motor to arch 4 and 6 muscles

62

GSA of vagus nerve

cutaneous innervation of skin of external ear, external auditory meatus, external surface of tympanic membrane, dura mater of posterior cranial fossa

63

SVA of vagus nerve

taste from epiglottic surface of tongue
-area of epiglottic valleculae

64

GVA of vagus nerve

sensory innervation to epithelium of endoderm origin

tongue, larynx, respiratory system, heart, gut tube, capsule of visceral organs, gonads

65

GVE-P of vagus nerve

parasympathetics to mucous in larynx, smoot m of gut tube glands, distal third of transverse colon, respiratory system, cardiac muscles

66

CN XI

spinal accessory nerve
GSE

67

spinal accessory nerve

CN XI

GSE - motor to sternocleidomastoid and trapezius muscle

68

CN XII

hypoglossal nerve
GSE

69

hypoglossal nerve

CN XII

GSE - motor to tongue

70

GSA nerves

general somatic afferent
V, VII, IX, X
5, 7, 9, 10

71

GSE nerves

general somatic efferents
III, IV, VI, XI, XII
3 ,4 ,6 ,11,12

72

GVA nerves

general visceral afferents
VII, IX, X
7, 9, 10

73

GVE nerves

general visceral efferents
III, VII, IX, X
3, 7, 9, 10

74

SVA nerves

special visceral afferents
I, VII, IX, X
1, 7, 9, 10

75

SVE nerves

special visceral efferents
V, VII, IX, X
5, 7, 9, 10

76

SSA nerves

special somatic afferent
II, VIII
2, 7

77

SSE nerves

special somatic efferents
VIII
8