Cranial Nerve Origins

Question 1

Olfactory N. (CN I)

Answer 1

Nerve cells in body of olfactory epithelium

Question 2

Optic N. (CN II)

Answer 2

Nerve cell bodies in retina and axons of the ganglion of retina

Question 3

Oculomotor N. (CN III)

Answer 3

• Midbrain/superior Colliculus

- AKA Accessory Nucleus (Edinger Westphal)

Question 4

Trochlear N. (CN IV)

Answer 4

Midbrain/Inferior Colliculus

Question 5

Trigeminal (CN V)

Answer 5

4 nuclei- motor nucleus

3 sensory- Mesencephalic Nucleus

Question 6

Ophthalmic (V-1)

Answer 6

Trigeminal Ganglion

Question 7

Maxillary (V-2)

Answer 7

Trigeminal Ganglion

Question 8

Mandibular (V-3)

Answer 8

Pons

Question 9

Abducens (CN VI)

Answer 9

Abducens nucleus in pons

Question 10

Facial (CN VII)

Answer 10

Ventrolateral Pons

Geniculate Ganglion

Question 11

Vestibulocochlear (CN VIII)

Answer 11

Vestibular Ganglion

Question 12

Cochlear N. (Branch of CN VIII)

Answer 12

Spiral Ganglion

Question 13

Glossopharyngeal N. (CN IX)

Answer 13

• 4 nucleus
  
  • 2 motor- Medulla
  • 2 sensory- Solitary Tract

Question 14

Vagus (CN X)

Answer 14

• Nerve cell bodies in Medulla
• 2 sensory
  
  • Nucleus of Trigeminal N.
  • Solitary Tract
• 2 motor
  
  • Nucleus Ambiguous
  • Dorsal Nucleus of Vagus

Question 15

Accessory N. (CN XI)

Answer 15

Cranial- Nucleus Ambiguous

Spinal- Anterior horn motor neurons in Sup. 5 segments of spinal cord

Question 16

Hypoglossal (CN XII)

Answer 16

Cell bodies of hypoglossal nucleus, medulla