Cranial Nerves

Question 1

Olfactory (I)

Answer 1

• Cribiform Plate
• Olfactory epithelium-> olfactory bulbs
• S: Smell

Question 2

Optic (II)

Answer 2

• Optic foramen
• Retina -> thalamus -> occipital lobe
• S: Vision

Question 3

Oculomotor (III)

Answer 3

• Superior Orbital Fissure
• Ventral midbrain -> most eye muscles, iris, ciliary body
• M: eye movement, pupil constriction

Question 4

Trochlear (IV)

Answer 4

• Superior Orbital Fissure
• Dorsal midbrain -> superior oblique muscle of the eye
• M: Inferolateral eye movement

Question 5

Trigeminal (V) Ophthalmic

Answer 5

• Superior Orbital Fissure
• Upper eye lid/face -> pons
• S: forehead skin, upper eye lid, cornea

Question 6

Trigeminal (V) Maxillary

Answer 6

• Foramen Rotundum
• Midface -> pons
• S: lower eye lid, upper teeth/lip

Question 7

Trigeminal (V) mandibular

Answer 7

• Foramen Ovale
• Lower face -> pons -> muscles of mastication
• S: tongue, lower teeth/lips
• M: muscles of maturation

Question 8

Abducens (VI)

Answer 8

• Superior Orbital Fissure
• Pons -> lateral rectus
• M: lateral eye movement

Question 9

Facial (VII)

Answer 9

• Internal Acoustic Meatus
• Pons facial muscles, anterior tongue, sublingual glands
• S: Taste
• M: Facial expression, salivation

Question 10

Vestibulocochlear (VIII)

Answer 10

• Internal Acoustic Meatus
• Inner ear -> pons, medulla
• S: balance, hearing

Question 11

Glossopharyngeal (IX)

Answer 11

• Jugular Foramen
• Posterior tongue, carotid artery, parotid gland, pharynx medulla
• S: taste, blood pressure, O2, CO2
• M: swallowing, salivation

Question 12

Vagus (X)

Answer 12

• Jugular Foramen
• Carotid artery, aortic arch, pharynx, larynx, viscera medulla
• S: blood pressure, O2, CO2
• M: Swallowing, speech, heart rate

Question 13

Accessory (XI)

Answer 13

• Jugular Foramen
• Medulla/Spinal cord -> neck and back muscles
• M: neck and back muscles

Question 14

Hypoglossal (XII)

Answer 14

• Hypoglossal Canal
• Medulla -> tongue muscles
• M: food manipulation, swallowing, speech