Cranial Nerve Flash Cards

Question 2

Name CN I-XII

Answer 2

olfactory CN I, optic CNII, occulomoterCN III, trochlear CN IV, trigeminal CN V, abducens CN VI, facial CN VII, vestibulococliear CN VIII, glossopharyngeal CN IX, vagus CN X, accessory CN XI, hypoglossal CNXII

Question 3

CN I

Answer 3

Olfactory Nerve (sensory), O: olfactory bulb, E: cribiform foramina, P: short subarachnoid course + penetrates arachnoid & dura to nasal cavity, LL: Inferior Aspect of Frontal Lobes (anosmia), F: olfactory epithelium, Fx: Special Sensory-Smell

Question 4

CN II

Answer 4

Optic Nerve (sensory), O: optic chiasm, E: optic canal, P: exit optic canal w/n subarachnoid space, carries dura, arachnoid, pia and subarachnoid space to posterior eyeball, LL: Ventral Diencephalon (visual field deficits), F: retina, Fx: Special Sensory-vision

Question 5

CN III

Answer 5

Oculomotor Nerve (motor), O: medial cerebral peduncles of midbrain, E: suprior orbital fissure, P: ant. tentorium to sup to post clinoid process then along carenous sinus, LL: Midbrain (eyes down + out, dilated pupils, ptosis, blurry vision), F: PS to sphincter pupillae+ciliary muscles, Motor to levator palpebrae superioris, sup,med, inf recti, inf oblique muscles of eye, Fx: motor, pupil constriction

Question 6

CN IV

Answer 6

Trochlear Nerve (motor) O: midbrain, E: superior orbital fissure P: long subarach course around midbrain, enters dura lat to post clinoid process to orbit, LL: Midbrain (can’t intort eye or look down when adducted), F: motor to superior oblique muscle

Question 7

Name Three Branches of CN V and Function

Answer 7

V1 Opthalmic, V2 Maxillary, V3 Mandibular

Question 8

CN V1

Answer 8

Opthalmic branch of Trigeminal Nerve, O: superior orbital fissure, E: supraorbital foramen, NFL- Nasociliary n, Frontal n, Lacrimal n

Question 9

CN V2

Answer 9

Maxillary branch of Trigeminal Nerve, O: Foramen rotundum, E: pterygopalatine fossa, pterygomaxillary fissure, infraorbital fissure, ZIP- Zygomatic n, Infraorbital n, Pterygopalatine ganglion

Question 10

CN V3

Answer 10

Mandiublar branch of Trigeminal Nerve, O: foramen ovale, BAIL- Buccal n, Auriculotemporal n, Inf alveolar n, Lingual n

Question 12

CN VI

Answer 12

Abducens Nerve (motor), O: low pons, E: superior orbital fissure, P: longest intracranial and intradural course, LL: Fx: motor- lateral rectus muscles (inwardly deviated eye, can’t abduct)

Question 13

CN VII

Answer 13

Facial Nerve

Question 14

CN VIII

Answer 14

Vestibulocochilear Nerve

Question 15

CN IX

Answer 15

Glossopharyngeal Nerve

Question 16

CN X

Answer 16

Vagus Nerve

Question 17

CN XI

Answer 17

Accessory Nerve

Question 18

CN XII

Answer 18

Hypoglossal Nerve