Trigeminal ganglion(sensory)

V1

V2

V3

Cavernoussinus

Cranial Nerve Vtrigeminal nerve

V1ophthalmic nervesensoryonly

V2maxillary nervesensory onlyV3mandibular nervesensorybefore foramenovale; mixedafter foramenovale

joinedby a motor root near the foramenovaleforskeletalmuscle

trigeminal ganglion 3 branches

Trigeminal nerve distribution

Somatic sensory from:

anterior 2/3rds of scalp

face

external acoustic meatus

anterior 2/3rds of tongue

teeth

mucous membranes of nasal and oral cavities, and paranasal sinuses

Motor to skeletal muscle:

muscles of mastication; masseter,pterygoids, temporalis (MAST)

mylohyoid, anterior digastric, tensor tympani, tensorvelipalatini(MATT)

Visceral motor:

Carries parasympathetic postganglionicfibres-preganglionicsin III, VII and IX

SupraorbitalSupratrochlear

Infratrochlear

Infraorbital

Mental

AuriculotemporalBuccal

Zygomaticofacial

Zygomaticotemporal

V1

V2

V3

Frontal

Supratrochlear

Supraorbital

Nasociliary

posterior & anteriorethmoidal

Lacrimal

Long ciliary(S & symp)

Short ciliary(S & parasymp)

Infratrochlear

Ciliaryganglion

Branch from III

V1

Branches of ophthalmic nerve

Zygomatic

Zygomaticofacial

Zygomaticotemporal

Greater &lesser palatine

Pterygopalatineganglion

Post, middle, & antsuperior alveolar

Infraorbital

Branches of maxillary nerve

V2

Branch from VIIGreater petrosal nerve

Auriculotemporal

Inferioralveolar

Lingual

Chorda tympani(from VII)

Nerve to mylohyoid (M)

Buccal (S)

Motor branches

Submandibular ganglion

Mental

Inferior alveolarBranches of mandibular nerve

V3

Otic ganglion

Motor branches to muscles of mastication and thetwotensors (tympani andvelipalatini)

One sensory nerve (buccalnerve)ANTERIORDIVISION

POSTERIORDIVISION

Sensory branches (auriculotemporal, lingual, inferior alveolar)One motor nerve (nerve to mylohyoid)

Facial nerveMotor to skeletal muscle:

stapedius, stylohyoid, posterior digastricmuscles of facial expression

Special sensation of taste from:

anterior 2/3rds of tongue

Preganglionicparasympatheticsto a named ganglion for:

lacrimalgland

submandibularand sublingual salivary glands

Somatic sensory from:

small area of auricle

Cervical

Buccal

Temporal

Zygomatic

Mandibular

Posteriorauricular

Motor rootexits skull via

stylomastoid foramen

Parotid gland

Motor root of VII

Nervus intermedius(taste, sense and parasymp)

Vestibulocochlear

Greater petrosal(taste and parasymp)Geniculate ganglion

(sensory)

Chorda tympani(taste and parasymp)

Internal acousticmeatus

Lingual

Chorda tympani(taste and parasymp)

Geniculate ganglion Greater petrosal

Facial motorroot

Inferior alveolar

Medial view

V2 Pterygopalatineganglion

GreaterPetrosal

(taste and parasymp)

Nerve ofpterygoid canal

Greater andlesser palatine nn

Greater petrosal nerve

Foramenlacerum

Deep petrosalnerve (symp)

Reflexes

-corneal

-blink(startling)

Sensory (aff.)Motor (eff.)

cornea-V1orbicularis oculi-VII

object comingtowards eye-II

orbicularis oculi-VII

Particularly helpful in assessing the brainstem function in theunconscious patient