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