Cranial Nerves

Question 1

All 12

Answer 1

Olfactory I
Optic II
Oculomotor III
Trochlear IV
Trigeminal V
Abducens VI
Facial VII
Vestibulocochlear VIII
Glossopharyngeal IX
Vagus X
Spinal Accessory XI
Hypoglossal XII

Question 2

3 Purely Sensory N.s

Answer 2

Olfactory n. (I)
Optic n. (II)
Vestibulocochlear n. (VIII)

Question 3

5 Purely Motor

Answer 3

Oculomotor (III)
Trochlear (IV)
Abducens (VI)
Spinal accessory (XI)
Hypoglossal (XII)

Question 4

2 Mostly Sensory

Answer 4

Trigeminal (V)

Glossopharyngeal (IX)

Question 5

1 Mostly Motor

Answer 5

Facial (VII)

Question 6

1 Sensory + Motor

Answer 6

Vagus (X)

Question 7

3 Olivary Nerves (+ Sulcus)

Answer 7

Preolivary sulcus: Hypoglossal (XII)

Postolivary sulcus: Vagus (X) and Glossopharyngeal (IX)

Question 8

Olfactory N. (I)

Answer 8

Olfactory bulb at base of brain, sends fibers through cribiform plate

Question 9

Optic N. (II) (+ additional point)

Answer 9

Comes off base of brain just anterior to pituitary and runs through optic canal with ophthalmic a. off interal carotid a.

Question 10

Optic Canal Clinical Consideration

Answer 10

Hypertension can cause opthalmic a. to compress optic n. (II) and cause visual problems

Question 11

5 Structures Through Superior Orbital Fissure

Answer 11

Ophthalmic Branch of Trigeminal N. (V1)
Trochlear n. (IV)
Oculomotor n. (III)
Abducens n. (VI)
Ophthalmic v.s

Question 12

Structure Through Foramen Rotundum (+ fiber type)

Answer 12

Maxillary branch of trigeminal n. (V2) - sensory

Question 13

Structure through Foramen Ovale

Answer 13

Mandibular branch of trigeminal n. (V3) - motor and sensory

Question 14

2 Structures Running through Internal Acoustic Meatus

Answer 14

Facial n. (VII)

Vestibulocochlear n. (VIII)

Question 15

4 Structures Through Jugular Foramen

Answer 15

Glossopharyngeal n. (IX)
Vagus n. (X)
Spinal accessory n. (XI) (exiting)
Internal jugular v.

Question 16

Structure Through Hypoglossal Canal

Answer 16

Hypoglossal n. (XII)

Question 17

3 Structures Through Foramen Magnum

Answer 17

Vertebral a.s
Medulla oblongata
Spinal accessory n. (XI) (entering)

Question 18

3 Branches of Trigeminal N. (+ nerve type)

Answer 18

Mandibular Branch (V3) - sensory + motor
Maxillary Branch (V2) - sensory
Opthalmic Branch (V1) - sensory

Question 19

Oculomotor n. (III)

Answer 19

From just anterior/superior to pons medially, through superior orbital fissure

Question 20

Trochlear n. (IV)

Answer 20

From superior to pons, through superior orbital fissure

Question 21

Trigeminal n. (V)

Answer 21

From lateral pons and splits, opthalmic through superior orbital fissure, maxillary through foramen rotundum, mandibular through foramen ovale

Question 22

Abducens n. (VI)

Answer 22

From inferior/medial/anterior to pons, through superior orbital fissure

Question 23

Facial n. (VII)

Answer 23

From lateral/inferior pons, through internal acoustic meatus

Question 24

Vestibulocochlear n. (VIII)

Answer 24

Just lateral/posterior to facial n. (VII), through internal acoustic meatus

Question 25

Glossopharyngeal n. (IX)

Answer 25

From postolivary sulcus, through jugular foramen

Question 26

Vagus n.

Answer 26

From postolivary sulcus, through jugular foramen

Question 27

Spinal accessory n. (XI)

Answer 27

From C1-6, enters through foramen magnum and leaves through jugular foramen

Question 28

Hypoglossal n. (XII)

Answer 28

From preolivary sulcus, through hypoglossal canal