4 - Cervical and Cranial Nerves - Stephens

Question 1

GSA fibers

Answer 1

General somatic afferent

-convey pain, temp, tactile, pressure and proprioception

Question 2

GVA fibers

Answer 2

General visceral afferent

-convey visceral pain (stretch, ischemia) and reflexes

Question 3

GSE fibers

Answer 3

General somatic efferent

-innervate muscles of myotonic origin

Question 4

GVE

Answer 4

General visceral efferent

-associated with symp (thoraco-lumbar) and parasymp (cranio-sacral) divisions of the ANS

Question 5

Which nerve primarily conveys GSA fibers?

Answer 5

Trigeminal

Question 6

What are the two muscles of myotonic origin in the head?

Answer 6

GSE

Extraocular m and intrinsic m of the tongue

Question 7

Which 4 cranial nerves are GVE assoc with?

Answer 7

3, 7, 9, 10

Question 8

SVA

Answer 8

Special visceral afferent

• convey olfactory and taste info
• -taste buds to ant 2/3 (CN VII) and post 1/3 (CN IX)

Question 9

Taste buds of the anterior 2/3 of the tongue are innervated by?

Answer 9

CN VII

Question 10

Taste buds of the posterior 1/3 of the tongue are innervated by?

Answer 10

CN IX

Question 11

SVE

Answer 11

Special visceral efferent

• innervate muscles of branchiomeric origins
• muscles of mastication (V)
• facial expression (VII)
• larynx and pharynx (X, except stylopharyngeus - IX)

Question 12

Which CN innervates muscles of mastication?

Answer 12

CN V

- SVE fibers

Question 13

Which CN innervates muscles of facial expression?

Answer 13

CN VII

- SVE fibers

Question 14

Which CN innervates larynx and pharynx? What is the muscle that is the exception to this rule?

Answer 14

CN X
-SVE fibers
EXCEPTION - stylopharyngeus - CN IX

Question 15

SSA

Answer 15

Special somatic afferent

-associated with optic (II) and vestibule-cochlear (VIII)

Question 16

What is the sensory complex for all sensations from the face?

Answer 16

Trigeminal sensory nuclei - GSA

Question 17

What is the sensory nucleus for general sensations from the posterior 1/3 of the tongue to the mid-portion of the transverse colon?

Answer 17

Solitary nucleus (NTS) - SVA and GVA fibers

Question 18

What innervates the epiglottis region for taste?

Answer 18

Vagus n.

Question 19

Trochlear nucleus innervates?

Answer 19

Superior oblique m

Question 20

Abducens nucleus innervates?

Answer 20

Lateral rectus m.

Question 21

The hypoglossal nucleus innervates?

Answer 21

All of the m associated with the tongue

EXCEPT the patatoglossus

Question 22

What is the one tone muscle not innervated by the hypoglossal nucleus?

Answer 22

Palatoglossus

Question 23

CN I

Answer 23

Olfactory

Question 24

CN VII

Answer 24

Facial

Question 25

CN III

Answer 25

Oculomotor

Question 26

CN V

Answer 26

Trigeminal

Question 27

CN IX

Answer 27

Glossopharyngeal

Question 28

CN XI

Answer 28

Spinal Accessory

Question 29

CN X

Answer 29

VAGUS

Question 30

CN VI

Answer 30

Abducens

Question 31

CN IV

Answer 31

Trochlear

Question 32

CN II

Answer 32

Optic

Question 33

CN VIII

Answer 33

Vestibulocochlear

Question 34

CN XII

Answer 34

Hypoglossal

Question 35

Olfactory

Answer 35

Smell

Question 36

Lesion of IX

Answer 36

Loss of gag reflex
Slight dysphagia
Loss sensation to pharynx and post 1/3 of tongue

Question 37

Lesion of X

Answer 37

Dysoponia
Dysphagia
Dyspnea
Loss of gag or laryngeal cough reflex

Question 38

Lesion of XI

Answer 38

Unilateral lesion - an ipsilateral inability to shrug the shoulder and flex/rotate the head

Question 39

Lesion of XII

Answer 39

Deviation of protruded tongue toward the affected side

Question 40

What 3 CN exit the skull at the jugular foramen?

Answer 40

IX, X, XI

aka VAG - you’re welcome

Question 41

Vernet’s syndrome

Answer 41

Basilar skull fracture due to trauma involving the jugular foramen
- ipsilateral IX, X and XI paralysis

Question 42

SVE nerves

Answer 42

5 7 9 10 11

Question 43

SVA nerves

Answer 43

1 7 9 10