Cranial Nerves

Question 1

1. Olfactory (S)

Answer 1

Origin: olfactory complex

Passage: cribriform foramina

Info: SS, olfactory mucosa

Question 2

2. Optic (S)

Answer 2

Origin: hypothalamus

Passage: optic canal

Info: SS, retina

Question 3

3. Occulomotor (M)

Answer 3

Origin: mesencephalon

Passage: sup orb fissure

Info: SM, inf oblique, med/sup/inf recuts
VM, intrinsic eye muscles

Question 4

4. Trochlear (M)

Answer 4

Origin: mesencephalon

Passage: sup orb fissure

Info: SM, sup oblique

Question 5

5. Trigeminal (X) // Opthalamic, Maxillary, Mandibular

Answer 5

Origin: pons

Passage: sup orb fissure, for rotundum, for ovale

Info: SM, muscles of mastication
SS, facial sensory

Question 6

6. Abducens (M)

Answer 6

Origin: pons

Passage: sup orb fissure

Info: lat rectus

Question 7

7. Facial (X)

Answer 7

Origin: pons

Passage: int acoustic meatus

Info: SM, facial expressions
SS, tip of tongue
VM, lacrimal gland, 2 salivary glands

Question 8

8. Vestibulocochlear (S)

Answer 8

Origin: pons

Passage: int acoustic meatus

Info: SS, vestibular apparatus and cochlea

Question 9

9. Glossopharyngeal (X)

Answer 9

Origin: med ob

Passage: jug foramen

Info: SM, swallowing muscles
SS, back of tongue
VM, parotid salivary gland
VS, carotid bodies

Question 10

10. Vagus (X)

Answer 10

Origin: med ob

Passage: jug foramen

Info: SM, larynx/pharynx
SS, skin of ear
VM, parasymp stimulation to thorax/abdomen
VS, same as above

Question 11

11. Spinal Accessory (M)

Answer 11

Origin: med ob

Passage: jug foramen

Info: SM, SCM and trapezius

Question 12

12. Hypoglossal (M)

Answer 12

Origin: med ob

Passage: hypoglossal canal

Info: SM, movement of tongue