Cranial Nerves

Question 1

CN I-1

Nerve, Foramen, Innervation, Function

Answer 1

Nerve- Olfactory Nerve

Foramen- Cribriform Plate

Innervation- Nasal cavity/smell

Function- Sensory

Question 2

CN II- 2

Nerve, Foramen, Innervation, Function

Answer 2

Nerve- Optic Nerve

Foramen- Optic Canal

Innervation- Sight/vision

Function- Sensory

Question 3

CN III-3

Nerve, Foramen, Innervation, Function

Answer 3

Nerve- Oculomotor Nerve

Foramen- Superior Orbital Fissure

Innervation- Extrinsic Muscles of Eye

Function- Motor

Question 4

CN IV- 4

Nerve, Foramen, Innervation, Function

Answer 4

Nerve- Trochlear Nerve

Foramen- Superior Orbital Fissure

Innervation- Superior Oblique Muscle of Eye

Function- Motor

Question 5

CN V- 5

Ophthalmic Division

(Nerve, Foramen, Innervation, Function)

Answer 5

Nerve- Trigeminal Nerve (Ophthalmic Division)

Foramen- Superior Orbital Fissure

Innervation- Skin of Eyelids
Scalp
Nose
Lacrimal Gland

Function- Sensory

Question 6

CN V- 5

Maxillary Division

(Nerve, Foramen, Innervation, Function)

Answer 6

Nerve- Trigeminal Nerve (Maxillary Division)

Foramen- Foramen Rotundum

Innervation- Upper Teeth
Palate
Skin of Cheek
Upper Lip

Function- Sensory

Question 7

CN V- 5

Mandibular Division

(Nerve, Foramen, Innervation, Function)

Answer 7

Nerve- Trigeminal Nerve (Mandibular Division)

Foramen- Foramen Ovale

Innervation/Function

Sensory:
   Tongue
   Lower Teeth
   Skin of Jaw
   Temporal Region

Motor:
Muscles of Mastication

Question 8

CN VI-6

Nerve, Foramen, Innervation, Function

Answer 8

Nerve- Abducens Nerve

Foramen- Superior Orbital Fissure

Innervation- Lateral Rectus Muscle

Function- Motor

Question 9

CN VII-7

Nerve, Foramen, Innervation, Function

Answer 9

Nerve- Facial Nerve

Foramen- Enters temporal bone via internal acoustic meatus; exits through stylomastoid foramen.

Innervation/Function

Sensory:
Taste buds of tongue

Motor:
Stimulate glands
Skeletal muscles of face

Question 10

CN VIII- 8

Nerve, Foramen, Innervation, Function

Answer 10

Nerve- Vestibulocochlear Nerve

Foramen- Internal Acoustic Meatus

Innervation:
Vestibular Branch-
   Equilibrium
Cochlear Branch-
   Hearing

Function- Sensory

Question 11

CN IX- 9

Nerve, Foramen, Innervation, Function

Answer 11

Nerve- Glossopharyngeal Nerve

Foramen- Jugular Foramen

Innervation/Function-

Sensory:
Posterior Tongue
Pharynx
Carotid Sinus

Motor:
Pharyngeal Muscles
Parotid Gland

Question 12

CN X- 10

Nerve, Foramen, Innervation, Function

Answer 12

Nerve- Vagus Nerve

Foramen- Jugular Foramen

Innervation/Function-

Sensory:
Pharynx
Larynx
Visceral Organs

Motor:
   Pharyngeal and Laryngeal Muscles
   Heart
   Lungs
   Abdominal Viscera

Question 13

CN XI- 11

Nerve, Foramen, Innervation, Function

Answer 13

Nerve- Accessory Nerve

Foramen:

Spinal Component:
Enters via Foramen Magnum, exits via Jugular Foramen

Cranial Component:
Exits via Jugular Foramen

Innervation- Trapezius
                     Sternocleidomastoid
                     Pharynx
                     Larynx
                     Soft Palate

Function- Motor

Question 14

CN XII- 12

Nerve, Foramen, Innervation, Function

Answer 14

Nerve- Hypoglossal Nerve

Foramen- Hypoglossal Canal

Innervation- Extrinsic and Intrinsic Muscles of Tongue

Function- Motor