Buccal Branch of the Facial Nerve, Lateral View

Description

Arising from the parotid plexus anterior to the auricle, the buccal branch of the facial nerve (CN VII) courses anteriorly across the lateral face, running superficial to the masseter and toward the buccinator and orbicularis oris at the level of the upper lip and nasal ala. Superiorly, temporal and zygomatic branches sweep toward the lateral orbital region, framing the lateral canthus and zygomatic arch. Fine motor fibers fan out across the cheek in a largely anteromedial direction, where they intersect the facial artery and vein as they ascend toward the nasolabial fold. Small connections with the buccal nerve (V3) are implied in this territory. Delicate anatomy. Damage to these fibers produces selective weakness of midfacial expression, classically affecting smiling, upper lip elevation, and cheek tension during blowing or whistling, even when frontal function appears preserved. Because the buccal branches run in a shallow plane over the masseter before entering the mimetic musculature, this view maps the danger zone for iatrogenic injury during parotidectomy, facelift (rhytidectomy), and midface approaches, and it helps explain why lacerations near the anterior border of the parotid gland can yield asymmetric movement around the oral commissure. The relationship to the parotid region also matters when evaluating facial nerve palsy patterns and localizing lesions relative to the stylomastoid foramen and parotid plexus. Surgeons can use this artwork when planning skin incisions and flap elevation in parotid surgery and cosmetic procedures, while educators will find it well suited for head and neck anatomy, dental anatomy, and neuroanatomy teaching that distinguishes facial motor branches from trigeminal sensory supply. Medical publishers can pair it with sections on Bell palsy, facial reanimation, and regional anesthesia landmarks in operative atlases or clinical review chapters. Anatomical accuracy verified by SciePro's Medical Advisory Board.