Cranial Nerves: Name And Nerve types

Question 1

I Olfactory

Answer 1

Sensory: olfaction

Question 2

II Optic

Answer 2

Sensory: vision

nb. decussation varies by species

Question 3

III Oculomotor

Answer 3

Parasympathetic motor: Ciliary & Constrictor pupillary muscles via EW nucleus
Somatic Motor: DR, MR, VR. Levator of eyelid.

Question 4

IV Trochlear

Answer 4

Somatic Motor: Dorsal Oblique

Question 5

V Trigeminal

Answer 5

Pharyngeal Arch 1
V1 Ophthalmic
Sensory
V2 Maxillary
Sensory
V3 Mandibular
Sensory
Motor: Jaw muscles (pterygoids, masseter, temporalis)

Question 6

VI Abducens

Answer 6

Motor: Lateral Rectus (LR), retractor bubli

Question 7

VII Facial

Answer 7

Motor: Facial Expression
Sensory: Rostral tongue

Question 8

VIII Vestibulocochlear

Answer 8

Sensory: Balance and hearing

Question 9

IX Glossopharyngeal

Answer 9

Sensory: Caudal tongue, pharynx, tympanic membrane + ear, carotid body baroreceptors, carotid sinus chemoreceptors
Parasympathetic: Parotid gland

Question 10

X Vagus

Answer 10

Parasympathetic: larynx, entire body basically

Question 11

XI Accessory

Answer 11

Motor: fuses with C3/4/5 to limb protractors

Question 12

XII Hypoglossal

Answer 12

Motor: Tongue intrinsic & extrinsic muscles