Olfactory Nerve (I)

Optic Nerve (II)

Oculomotor Nerve (III)

Note: Red and blue here denoteleft/right visual fields. All arespecial sensory (vision) only.

Sagittal section through ethmoid bone

Nasal Cavity

Anterior

Posterior

Superior view of cranium

Olfactory BulbOlfactory Tract

Mucosa

Layer of Mucus

Cribriform Plate

Olfactory Nerves (I)

Midbrain

Edinger-Westphal Nucleus

Oculomotor Nucleus

Ciliary Ganglion

Retina Retina

OpticCanals

OpticChiasma

OpticNerves (II)

OpticTracts

Lateral GeniculateNuclei

Superior Ramus

Inferior Ramus

Ciliary Body (Accommodation)Iris (Constriction)

Levator Palpebrae Superioris Superior Rectus

Medial RectusInferior RectusInferior Oblique

(CNV - Short

Ciliary)Oculomotor Nerve (III)

Superior OrbitalFissure

To medial temporal lobe

pupil

sympathetic - dilationparasympathetic - constriction

unaccommodated, flat lens, distant visionzonule fibers contracted when ciliary muscle relaxes

accommodated, thick lens, near visionzonule fibers relaxed when ciliary muscle contracts

lens

iris

Trigeminal Nerve (V1) Opthalmic Branch

Trochlear Nerve (IV)

trochlea

Superior view of left eye

lateralmedial

Superior view of right orbit

Midbrain TrochlearNerve (IV)

Superior OrbitalFissure

Midline

Superior ObliqueTrochlearNucleus

Pons

TrigeminalGanglion

PosteriorEthmoidalForamen

AnteriorEthmoidalForamen

SuperiorOrbitalFissure

SupraorbitalForamen

Lacrimal

Frontal

Supraorbital

Sup

ratr

och

lear

ExternalNasal

InternalNasal Anterior

Ethmoidal

PosteriorEthmoidal

Infr

atro

chle

ar

Long C

iliar

y

Sho

rt C

iliar

y

Nasocil

iary

Trigeminal (V)Opthalmic Branch

CiliaryGanglion

Cornea

Trigeminal Nerve (V3) - Mandibular Branch

Trigeminal Nerve (V2) - Maxillary Branch

(skin, mucosaof lower lip)

(ant digastric)

(skin of parotid gland)

Pons Trigeminal Ganglion

ForamenRotundum

Inferior OrbitalFissure

Infraorbital Groove/CanalInfraorbitalForamen

PterygomaxillaryFissure (lateral coming toward you)

SphenopalatineForamen

Greater PalatineForamen

Greater Palatine(hard palate, incl. taste)

Incisive Fossa

Lesser PalatineForamen

Lesser Palatine

(soft palate, incl. taste)

PalatovaginalCanal

Pharyngeal

(nasopharynx)

Nasopalatine

Zygomatic

Infraorbital

Anterior Superior Alveolar (canine, incisors)

Medial Superior Alveolar (pre-molars)

Posterior Superior Alveolar (molars)

Lateral Posterior Superior Nasal

Medial Posterior Superior Nasal

Trigeminal (V)Maxillary Branch

Pons TrigeminalGanglion

TrigeminalMotor Nucleus Foramen

Ovale

ForamenSpinosum

MandibularForamen

MentalForamen

Deep Temporal (temporalis)

Masseteric

Lateral Pterygoid

Medial Pterygoid (tensor palatini, tensor tympani)

Long Buccal (skin/mucosa of cheek, gingiva)

Lingual (mucosa of ant. 2/3 tongue, incl. taste)

Incisive

Mental

Inferio

rA

lveolar

Auriculotemporal

MiddleMeningial A.

Meningeal Branch

Nerve to the Mylohyoid

Trigeminal (V)Mandibular Branch

PterygopalatineGanglion

(Maxillary Sinus Mucosa)

Lateral view of rightpterygopalatine fossa

anteriorposterior

(skin of cheek bone)

anteriorposterior

Lateral view of skull

Facial Nerve (VII)

Abducens Nerve (VI)

(tongue/taste)

Pons

Facial MotorNucleus

SuperiorSalivatoryNucleus

GeniculateGanglion

Internal AuditoryMeatus

Hiatus of GreaterPetrosal N.

Pterygoid Canal

PterygopalatineGanglion

LacrimalGland

Pter

ygop

alat

ine

Foss

a

StylomastoidForamen

PetrotympanicFissure

Greate

rPetro

sal

Nerve of thePterygoid Canal

GreaterPalatine(Taste)

LesserPalatine(Taste)

*Travels w/ TrigeminalMaxillary Branch to mucosaof hardpalate and nasalcavity; except to skin anddental pulp

Lacrimal N.

Lingual

Chorda Tympani

(Taste - ant 2/3 of tongue)

N. to theStapedius

N. to the Posterior Digastric

N. to the Stylohyoid

Temporal

Zygomatic

Buccal

Marginal Mandibular

Cervical

Facial (VII)(incl. Taste)

Sublingual Gland

Abducens

Nerve (VI)

Superior Orbital Fissure

Lateral Rectus

Abducens Nucleus

Pons

abducts the eye

Superior view of left eye

opticnerve

SubmandibularGanglion

SubmandibularGland

Zygomatic N.

* *

Vagus Nerve (X)

Glossopharyngeal Nerve (IX)

(Note: Vestibulocochlear diagram not included by Dr. Carry - VIII has hearing axons only)

Lingual [branch of glossopharyngeal](Taste - Post. 1/3 of Tongue)

Tonsilar (tonsilar bed)

Pharyngeal (gag reflex)

Tympanic

TympanicCanaliculus

Less

er P

etro

sal

JugularForamen

SuperiorGanglion

InferiorGanglion

JugularForamenVagus (X)

(incl. Taste)

SuperiorGanglion

InferiorGanglion

N. to the Stylo-pharyngeus

Car

oti

d A

.Caro

tid

Hiatus for theLesser Petrosal Foramen Ovale

OticGanglion

w/ Auriculotemporal

ParotidGland

NucleusAmbiguus

NucleusAmbiguus

InferiorSalivatoryNucleus

Glosso-

pharyngeal (IX)

(incl. Taste)

Medulla

Medulla

Auricular

Carotid

Pharyngeal

Muscles of Palate/Pharynx(except tensor palatini, stylopharyngeus)

Pharyngeal Plexus

Superior Laryngeal(incl. Taste)

InternalLaryngeal(incl. Taste)

External Laryngeal

Recurrent Laryngeal

Vagal Trunk

Sensory and Taste: Epiglottis to Vocal folds

Cricothyroid, Inferior Constrictors

From Vocal folds to Trachea,Larynx except Cricothyroid & Inf Constrictors

Sensory to LeftColic Flexure

(middle ear)

carotid body

Hanging frommandibular brof CNV

DorsalMotorNucleus

Hypoglossal Nerve (XII)

Spinal Accessory Nerve (XI)

Bonus Content!

C1 C2 C3 C4 C5

Cranial Nerves Mnemonics:(G-rated) On Old Olympus’ Towering Tops A Famous Vocal German Viewed Some Hops(X-rated) Oh, Oh, Oh, To Touch And Feel Virgin Girls Vaginas And Hymens

Some Say Marry Money, But My Brother Says Big Brains Matter More(S=Sensory, M=Motor, B=Both) Substitute “Boobs” for “Brains” for dirty version

Bony Landmarks/Exit Points C O S3 R O S I2 J3 H Cribriform Plate - I Optic Canal - II Superior Orbital Fissure - III, IV, V1

Rotundum (Foramen) - V2

Ovale (Foramen) - V3

Superior Orbital Fissure - VI Internal Acoustic Meatus - VII, VIII Jugular Foramen - IX, X, XI Hypoglossal Canal - XII

*damage to right hypoglossal nerve results in deviation of tongue to the right

Hypoglossal

Nerve (XII)

Genioglossus Hyoglossus Styloglossus Intrinsic Muscles of Tongue

Hypoglossal Nucleus

MedullaHypoglossal Canal

ForamenMagnum

Jugular Foramen

Sterocleidomastoid Trapezius

Spinal Accessory (XI)

emerging betweenpyramid/olive