Anat Chp 15 Cranial Nerves

Front 1

function: Olfaction

Back 1

olfactory nerve
-cribriform foramina
(I)

Front 2

Vision

Back 2

optic nerve
-optic canal
(II)

Front 3

Somatic motor: 4 extrinsic eye muscles and levator palpebrae superioris - Parasympathetic motor: pupil (iris) and ciliary muscle

Back 3

oculomotor
-superior orbital fissure
(III)

Front 4

Somatic motor: Superior oblique muscle

Back 4

trochlear nerve
-superior orbital fissure
(IV)

Front 5

Sensory: V1 cornea, nose, forehead, anterior scalp - V2: nasal mucosa, palate, gums, cheek, upper teeth - V3anterior 2/3 of tongue, skin of chin, lower jaw and teeth, part of auricle
Somatic motor: muscles of mastication and others of lower face

Back 5

trigeminal nerve
-maxiallary: foramen rotundum
-opthalmic: superior orbital fissure
manidibular: foramen ovale
(V)

Front 6

Somatic motor: lateral rectus muscle

Back 6

abducens nerve
superior orbital fissure (VI)

Front 7

Sensory: anterior 2/3 tongue
Somatic motor: muscles of facial expression and others (e.g. digastric and stapedius)
Parasympathetic motor: submandibular and sublingual glands

Back 7

facial nerve (VII)
-internal acoustic canal
-stylomastoid foramen

Front 8

Equilibrium Hearing

Back 8

Vestibulo Cochlear (VIII)
-internal acoustic canal

Front 9

Sensory: posterior 1/3 of tongue, carotid sinus (blood pressure and chemistry)
Somatic motor: a muscle of the pharynx
Parasympathetic motor: parotid gland

Back 9

Glosspharyngeal (IX)
-jugular foremen

Front 10

Sensory: pharynx, larynx, thoracic and abdominal viscera, external auditory canal, tympanum
Somatic motor: pharyngeal and laryngeal muscles
Parasympathetic motor: myocardium, smooth muscle and glands of viscera

Back 10

Vagus (X)
-jugular foramen

Front 11

Somatic motor: Cranial root: some muscles of pharynx - Spinal root: trapezius and sternocleidomastoid

Back 11

accessory nerve
-jugular foramen
(XI)

Front 12

Somatic motor: intrinsic and extrinsic tongue muscles

Back 12

hypoglossal nerve (XII)
-hypoglossal canal