Cranial Nerves

Question 1

Cranial Nerves

Answer 1

Attach to the brain and pass through foramina of the skull
Paired & Numbered from I–XII (i.e. 1-12)
Primarily serve head and neck structures
All nerves attach to brain stem except nerves I and II

Question 2

Cranial Nerves I and II

Answer 2

Cranial nerves I and II attach to the forebrain
All others attach to the brain stem

Question 3

I - Olfactory Nerves

Answer 3

Sensory nerves of smell

Question 4

II - Optic Nerve

Answer 4

Sensory nerve of vision

Question 5

III - Oculomotor Nerve

Answer 5

Innervates (motor) four of the extrinsic eye muscles

Question 6

IV - Trochlear Nerve

Answer 6

Innervates (motor) an extrinsic eye muscle

Question 7

V - Trigeminal Nerve

Answer 7

• Provides sensory innervation to the face (face, scalp, teeth, chewing motions)
• Motor innervation to chewing muscles
• 3 divisions:Opthalmac
  Maxillary, Mandibular

Question 8

V - Trigeminal Nerve Divisions

Answer 8

Opthalmac
Maxillary
Mandibular

Question 9

VI - Abducens Nerve

Answer 9

Abducts the eyeball (motor)

Question 10

VII - Facial Nerve

Answer 10

Innervates (motor) muscles of facial expression
5 Divisions:Temporal, Zygomatic, Buccal, Mandibular, &
Cervical

Question 11

VII - Facial Nerve Divisions

Answer 11

Temporal
Zygomatic
Buccal
Mandibular
Cervical

Question 12

VIII - Vestibulocochlear Nerve

Answer 12

Sensory nerve of hearing and balance

Question 13

IX - Glossopharyngeal Nerve

Answer 13

Innervates structures of the tongue and pharynx (motor)

Question 14

X - Vagus Nerve

Answer 14

A mixed sensory and motor nerve
“Wanders” into thorax and abdomen
(extends onto the abdomen)

Longest cranial nerve

Question 15

XI - Accessory Nerve

Answer 15

An accessory part of the vagus nerve
A motor nerve of the SCM and trapezius muscle

Question 16

XII - Hypoglossal Nerve

Answer 16

Runs inferior to the tongue
Innervates the tongue muscles (motor)