Cranial Nerves

Question 1

Exit: Cribiform foramina

Answer 1

I - olfactory

Question 2

Exit: Optic canal

Answer 2

II - optic

Question 3

Exit: Orbital fissure

Answer 3

III - oculomotor
IV - trochlear
V 1 - ophthalmic branch of trigeminal
VI - abducens

Question 4

Exit: Round foramen - rostral alar foramen

Answer 4

V 2 - maxillary branch of trigeminal

Question 5

Exit: Oval foramen

Answer 5

V 3 - mandibular branch of trigeminal

Question 6

Exit: Stylomastoid foramen

Answer 6

VII - facial

Question 7

Exit: Jugular foramen - Tympano-occipital fissure

Answer 7

IX - glossopharyngeal
X - vagus
XI - accessory

Question 8

Exit: Hypoglossal canal

Answer 8

XII - hypoglossal

Question 9

Which cranial nerve does not have an exit foramen?

Answer 9

VIII - vestibulococlear

Question 10

SVA

Special Visceral Afferent

Answer 10

I - olfactory: olfaction
VII - facial: taste sensation from rostral 2/3 of tongue
IX - glossopharyngeal: taste sensation from caudal 1/3 of tongue
X - vagus: some taste fibers from pharynx

Question 11

SSA

Special Somatic Afferent

Answer 11

II - optic: vision

VIII - vestibulococlear: balance and audition

Question 12

GSE

General Somatic Efferent

Answer 12

III - oculomotor: motor to ventral oblique m.; dorsal, ventral, medial rectus mm.; levator palpebrae superioris m
IV - trochlear: motor to dorsal oblique m.
VI - abducens: motor to lateral rectus m. and retractor bulbi m. of eye
XII - hypoglossal: motor to extrinsic and intrinsic muscles of tongue

Question 13

GVE

General Visceral Efferent

Answer 13

III - oculomotor: parasympathetic fibers to sphincter m. of iris and to ciliary m.
VII - facial: parasympathetic fibers to lacrimal, nasal, and palatine glands and to mandibular and sublingual glands
IX - glossopharyngeal: parasympathetic fibers to parotid and zygomatic salivary glands
X - vagus: motor to smooth m. and glands of respiratory and digestive systems and motor to heart

Question 14

GSA

General Somatic Afferent

Answer 14

V 2 - ophthalmic branch of trigeminal: sensory to and around eye
V 3 - mandibular branch of trigeminal: sensory to and around inferior arcade, lip, and tongue
X - vagus: some sensory fibers from external auditory canal

Question 15

SVE

Special Visceral Efferent

Answer 15

V 3 - mandibular branch of trigeminal: motor to muscles of mastication except caudal half of digastricus m.
VII - facial: motor to most muscles of facial expression and caudal half of digastricus m.
IX - glossopharyngeal: motor to pharyngeal muscles
X - vagus: motor to muscles of pharynx and larynx
XI - accessory: motor to trapezius m. and partially to sternocephalicus, brachiocephalicus, and omotransversarius mm.

Question 16

General Function: Sensory

Answer 16

I - olfactory
II - optic
VIII - vestibulococlear

Question 17

General Function: Motor

Answer 17

III - oculomotor
IV - trochlear
VI - abducens
XI - accessory
XII - hypoglossal

Question 18

General Function: Sensory & Motor

Answer 18

V - trigeminal
VII - facial
IX - glossopharyngeal
X - vagus