Cranial Nerves

Question 1

GSA

Answer 1

general somatic afferent

1. exteroceptive impulses (pain, temperature, touch) from epithelium of ectodermal origin
2. proprioceptive impulses from sensory endings in body wall, tendons, joints

Question 2

GVA

Answer 2

general visceral afferent

1. sensory impulses (generally pain) from visceral structures within body lined by epithelium of endodermal origin

Question 3

SSA

Answer 3

special somatic afferent

1. ear and eye (vision, hearing, equilibrium)

Question 4

SVA

Answer 4

special visceral afferent

1. specialized fibers for smell and taste (visceral b/c functional association with digestive tract)

Question 5

GSE

Answer 5

general somatic efferent

1. fibers conveying motor impulses to skeletal muscle

Question 6

GVE

Answer 6

general visceral efferent

1. autonomic fibers which innervate smooth muscle of gut tube, blood vessels, cardiac muscle, and fibers which regulate glandular secretion
2. subdivided into sympathetic (GVE) and parasympathetic (GVE-P) and found in spinal nerves and some cranial nerves

Question 7

SSE

Answer 7

special somatic efferent

1. nerve fibers which can reflexively influence sensory input to ear

Question 8

SVE

Answer 8

special visceral efferent
1. nerves which innervate skeletal muscles derived from visceral arch mesoderm; includes muscles of mastication, facial expression, pharynx, pallate, and larynx (visceral designation nothing to do with autonomic nervous system)

Question 9

GSE nerves

Answer 9

1. all spinal nerves

2. CN III, IV, VI, XI, XII

Question 10

SSE nerve

Answer 10

1. CN VIII

Question 11

GVE nerves

Answer 11

1. all spinal nerves (sympathetic)

2. CN III, VII, IX, X (parasympathetic GVE-P)

Question 12

SVE nerves

Answer 12

1. CN V, VII, IX, X (branchiomerics)

Question 13

GSA nerves

Answer 13

a) proprioceptive
1. all spinal nerves
2. CN V
b) exteroceptive
1. all spinal nerves
2. CN V, VII, IX, X

Question 14

SSA nerves

Answer 14

a) proprioceptive
1. CN VIII (vestibular portion)
b) exteroceptive
1. CN II, VIII (cochlear portion)

Question 15

GVA nerves

Answer 15

1. all spinal nerves

2. CN VII, IX, X

Question 16

SVA nerves

Answer 16

1. CN I (smell)

2. CN VII, IX, X (taste)

Question 17

CN I

Answer 17

olfactory

1. SVA
2. sensory

Question 18

CN II

Answer 18

optic

1. SSA
2. sensory

Question 19

CN III

Answer 19

olfactory

1. GSE, GVE-P
2. motor

Question 20

CN IV

Answer 20

trochlear

1. GSE
2. motor

Question 21

CN V

Answer 21

trigeminal

1. SVE, GSA
2. both

Question 22

CN VI

Answer 22

abducens

1. GSE
2. motor

Question 23

CN VII

Answer 23

facial

1. GSA, GVA, SVA, SVE, GVE-P
2. both

Question 24

CN VIII

Answer 24

vestibulocochlear

1. SSA, SSE
2. sensory (motor component often ommitted)

Question 25

CN IX

Answer 25

glossopharyngeal 1. GSA, GVA, SVA, SVE, GVE-P 2. both

Question 26

CN X

Answer 26

vagus 1. GSA, GVA, SVA, SVE, GVE-P 2. both

Question 27

CN XI

Answer 27

spinal accessory 1. GSE 2. motor

Question 28

CN XII

Answer 28

hypoglossal 1. GSE 2. motor