This is the study aid I created to help memorize the branches and function of the 5th cranial nerve, the trigeminal nerve.

1. TRIGEMINAL NERVE
OPTHALMIC BRANCH (V1) - Sensory only
NASOCILIARY – Sides of nose, eyeball, iris and sinuses
Sensory Root of Ciliary Ganglion
Long Ciliary – Involved in Corneal Reflex
Anterior Ethmoidal
Posterior Ethmoidal
Infratrochlear
LACRIMAL – Conjunctiva and lacrimal gland.
FRONTAL – Forehead, frontal sinus and upper eyelid.
Supra Orbital - Larger
Supra Trochlear – Smaller
MAXILLARY BRANCH (V2) - Sensory Only
WITHIN CRANIUM
MIDDLE MENINGEAL – Innervates Dura Mater
IN INFRAORBITAL FISSURE
INFRAORBITAL NERVE – Lower eyelid, upper lip, incisors and canines.
Supeior Labial – Cheek and upper lip (ON FACE)
Inferior palpebral – Skin and conjunctiva of lower eyelid. (ON FACE)
Anterior Superior Alveolar – Incisors and Canines
ZYGOMATIC NERVE – Skin over zygomatic and temporal bones.
Zygomaticotemporal Nerve
Zygomaticofacial Nerve
WITHIN PTERYGOPALATINE FOSSA

2. NASOPALATINE NERVE - Incisive foramen and palatine glands.
POSTERIOR SUPERIOR ALVEOLAR (PSA)
MIDDLE SUPERIOR ALVEOLAR (MSA)
GREATER PALATINE NERVE – Hard Palate
Posterior Inferior Nasal – Inner nose
LESSER PALATINE NERVE - Soft palate, tonsil, uvula.
PHARYNGEAL (PTERYGOPALATINE NERVE) – Nasal part of pharynx.
MANDIBULAR BRANCH (V3)
PRE DIVISION
MENINGEAL (NERVUS SPINOSIS) (Sensory) – Dura Mater
MEDIAL PTERYGOID – (Motor)
Tensor Tympani (Motor)
Tensor Veli Palatini (Motor)
ANTERIOR DIVISION
MASSETERIC (Motor)
DEEP TEMPORAL
Anterior Deep Temporal (Motor)
Posterior Deep Temporal (Motor)
BUCCAL (Sensory)
LATERAL PTERYGOID (Motor)
POSTERIOR DIVISION
AURICULOTEMPORAL (Superficial Temporal) (Sensory) Side of head.
LINGUAL (Sensory to tongue and submandibular and sublingual glands)

3. INFERIOR ALVEOLAR
POSTERIOR BRANCH
Mylohyoid (Motor)
Anterior Belly of Digastric (Motor)
ANTERIOR DIVISION – Sensory to posterior teeth)
Mental Nerve (Sensory) Chin and lower lip.
Mandibular Incisive Nerve (Sensory) Anterior teeth