Makindo Medical Notes"One small step for man, one large step for Makindo" |
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Related Subjects: |Olfactory Nerve |Optic Nerve |Oculomotor Nerve |Trochlear Nerve |Trigeminal Nerve |Abducent Nerve |Facial Nerve |Vestibulocochlear Nerve |Glossopharyngeal Nerve |Vagus Nerve |Accessory Nerve |Hypoglossal Nerve
The trigeminal nerve (CN V) is the largest cranial nerve. It carries both sensory and motor fibres, providing facial sensation and controlling muscles of mastication. It arises from the pons and is associated with the first pharyngeal arch.
| Branch | Type | Key Areas Supplied | Clinical Notes |
|---|---|---|---|
| Ophthalmic (V1) | Sensory | Forehead, scalp, upper eyelid, cornea, dorsum of nose | Herpes zoster ophthalmicus can threaten vision. Afferent limb of corneal reflex. |
| Maxillary (V2) | Sensory | Lower eyelid, cheek, upper lip, upper teeth & gums, nasal mucosa, palate | Dental blocks often target infraorbital or superior alveolar branches. |
| Mandibular (V3) | Mixed |
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Jaw deviates towards side of lesion due to unopposed pterygoid action. |
Dermatome maps of V1, V2, V3 are invaluable for learning. Example resources: