Cranial Nerves

Question 1

Motor Cranial Nerves

Answer 1

3, 4, 6, 11, 12

Question 2

Sensory/Motor Cranial Nerves

Answer 2

5, 7, 9, 10

Question 3

Afferent Spinal Nerves

Answer 3

Cell bodies found in ganglia in DORSAL ROOT

GANGLIA collection of cell bodies outside CNS

Question 4

Afferent Cranial Nerves

Answer 4

Cell bodies in associated ganglia

1 : Ganglion cells in Olfactory mucosa
2 : ganglion cells in retina
5 : Trigeminal
7 : Geniculate
8 : Spiral, Vestibular
9 : Superior, Inferior
10: Superior, Inferior

Question 5

Cranial Motor Neurons

Answer 5

Bodies are located in NUCLEUS in brain stem

3 : Oculomotor 
4 : Trochlear
5 : Trigeminal 
6 : Abducens
7 : Facial 
9 : Nucleus Ambiguous 
10: Nucleus Ambiguous 
11: Spinal Accessory 
12: Hypoglossal

Question 6

Sympathetic Pathway To Head

Answer 6

Preganglionic sympathetic neurons traveling to the head arise in the upper thoracic levels of the spinal cord and ascend the sympathetic chain to the superior cervical ganglion. A synapse occurs in the superior cervical ganglion, and postganglionic neurons form plexuses on the internal and external carotid arteries in the head. The neurons in the plexus generally travel to their destination by following arterial branches, although some fibers do join cranial nerves to reach their target

Question 7

CN 1

Answer 7

Olfactory Nerve

Afferent

Smell
Cell bodies in olfactory mucosa

Question 8

CN II

Answer 8

Optic Nerve

Afferent

Sight
Dendrites and body in retina

Through optic canal

Question 9

CN III

Answer 9

Oculomotor

Motor and Parasympathetic

4 of 6 extra ocular muscles

Elevates eyelid

Constriction of pupil (accommodation)

Through orbital fissure

Question 10

CN IV

Answer 10

Trochlear

Motor

Motor innervation to superior oblique

Arises from Dorsal brainstem
Passes through orbital fissure

Question 11

CN V

Answer 11

Trigeminal

Sensory, Motor

General face sensations

V1: Superior orbital fissure, 1/2 scalp, top nose, cornea
V2: Foramen Rotunda, Nasal cavity,
V3: Foramen Ovale, general sensation of anterior 2/3 tongue and palate, MOTOR mastication

Question 12

CN VI

Answer 12

Abducens

Motor Efferent

Lateral rectus muscle of eye
Turns eye out

Through cavernous sinus and Orbital fissure

Question 13

CN VII

Answer 13

Facial

Motor, Sensory, Para

Facial muscles
Taste anterior 2/3
Lacrimal and salivary glands

Enter internal acoustic meat us
Motor exit stylomastoid foramen

Question 14

VIII

Answer 14

Vistibulocochlear

Sensory

Cochlear and Vestibular division

Internal acoustic meatus

Question 15

IX

Answer 15

Glossopharyngeal

Sensory, Motor, Para

General sensory for EAR and ORAL pharynx

General and taste post 1/3 tongue

Afferent from carotid body and sinus

Para to Parotid gland

Enters Jugular Foramen

Question 16

X

Answer 16

Vagus

Para, Motor, Sensory

Muscles of palate, pharynx, larynx

Sensory: e. Acoustic meatus, pharynx, and larynx

Visceral parasympathetics

Question 17

XI

Answer 17

Accessory Nerve

Motor

Trapezius and sternocleidomastoid

Neuronal cell bodies in upper five segments of ventral horn in spinal chord

Through Foramen magnum

U turn through jugular Foramen

Question 18

XII

Answer 18

Hypoglossal

Motor

Tongue

Hypoglossal canal

Question 19

Sensory Cranial Nerves

Answer 19

1, 2, 8