Trigeminal nerve
Originates in pons
Trigeminal nerve exits skull
clinical testing
- see Cranial nerve reflexes: jaw jerk, corneal reflex
CN5 divisions and branches
Ophthalmic division: 5 cutaneous branches
= sensory
- Supraorbital nerve
- Supratrochlear nerve - upper eyelid, superior conjunctiva, forehead, scalp
- Infratrochlear nerve
- External nasal nerve
- Lacrimal nerve - Conjunctiva,
Maxillary nerve: 3 cutaneous branches
= sensory
- Infraorbital nerve - Conjunctiva, lower Eyelids, Nasal cavity, lateral lower 1/2 of nose
- Zygomaticofacial nerve - lower Eyelids, conjunctiva
- Zygomaticotemporal nerve
Mandibular division: 3 cutaneous branches
= motor and sensory
- Mental nerve
- Buccal branch
- Auriculotemporal nerve - Ear, Parotid gland, External ear