2.4 Craniofacial Anatomy: Bones, Muscles, Nerves & Vascular Pathways of the Head and Neck

Why a facial is anatomy, not just cream

Level 2 clinic hours put your hands on faces. Bones are fulcrums, muscles are what you move, nerves explain sharp pain, and vessels explain bruising and the danger triangle. PSI National Domain 2 is consultation and analysis; Domain 3 includes skin care and massage; Domain 5 covers eyelash and eyebrow work; Domain 6 is hair removal. All of those services fail if you cannot name the head and neck under your palms. This independent OpenExamPrep section teaches that map. It does not claim official approval from PSI or the Georgia Board.

Bones you can palpate

Standard teaching counts 8 cranial bones and 14 facial bones.

Cranial: frontal, occipital, two parietal, two temporal, sphenoid, ethmoid.

Facial (high-yield for services): two maxillae, mandible, two zygomatic, two nasal, two lacrimal, two palatine, two inferior nasal conchae, vomer.

The frontal bone under the forehead will not give way for a comedone extractor. Lacrimal bones help form the medial orbit — angular vessels run near here. Sphenoid and ethmoid complete deep orbit walls; you will not palpate them as surface knobs, but they explain why a blow-out fracture history belongs on the intake form (Chapter 5).

Muscles of facial expression (cranial nerve VII)

These muscles insert into skin, which is why your massage moves features.

• Occipitofrontalis (frontalis belly) — raises brows; forehead lines.
• Corrugator supercilii — draws brows together (glabellar “11s”).
• Procerus — wrinkles the nasion.
• Orbicularis oculi — sphincter of the eye, with orbital, palpebral, and lacrimal portions. This is the muscle of brow- and lash-adjacent waxing. Dragging wax across palpebral fibers on thin lid skin can stress an older lid and smear product toward the puncta.
• Nasalis — nose.
• Levator labii superioris and levator labii superioris alaeque nasi
• Zygomaticus major and minor — smile.
• Risorius
• Orbicularis oris — mouth sphincter; lip waxing and vermilion-border extraction.
• Buccinator — cheek wall.
• Depressor anguli oris, depressor labii inferioris, mentalis
• Platysma — superficial neck. Neck massage must respect the anterior midline; you are not manipulating thyroid viscera.

Muscles of mastication (motor trigeminal V3): masseter, temporalis, medial and lateral pterygoids. You may perform gentle extraoral massage over masseter if you were taught it and the client is comfortable. You do not treat TMJ disorders, lockjaw, or suspected dental abscess. That pain is a refer.

Massage direction. Learn each muscle’s fiber direction so strokes are controlled. Superficial lymphatic-style work generally moves toward preauricular, submandibular, and cervical nodes, not toward the eye. Never drag heavy product into the palpebral fissure.

Nerves

Cranial nerve V — trigeminal nerve — primary sensory nerve of the face, and motor to muscles of mastication. Divisions:

• V1 ophthalmic — forehead, upper lid, cornea (corneal care is medical). Exits include supraorbital.
• V2 maxillary — midface, lower lid, upper lip. Infraorbital foramen.
• V3 mandibular — lower face, lower lip, chin, plus mastication motor. Mental foramen.

A sharp electric zap during cheek extraction over the infraorbital foramen means too deep, too medial, too hard. Stop that point. Do not “work through it.”

Cranial nerve VII — facial nerve — primary motor nerve of facial expression. It transits the parotid gland. You do not extract “parotid pimples.” A lump at the jaw angle is a refer. Terminal branches often taught: temporal, zygomatic, buccal, marginal mandibular, cervical.

Avoid heavy tapotement over the ramus of the mandible and parotid region. A client with new facial droop, inability to close an eye, or a crooked smile: stop immediately. If onset is sudden with other stroke signs (face, arm, speech, time), that is emergency medical care, not a relaxing massage. If the client already has a physician-managed facial palsy, stay off compromised lids and follow medical direction. You do not diagnose Bell’s palsy.

Vascular pathways

The facial artery (from the external carotid) crosses the mandible at the anterior border of masseter — you can often feel a pulse. It continues toward the angular artery near the medial canthus, anastomosing with ophthalmic branches. The superficial temporal artery crosses the temple.

The facial vein and angular vein communicate with ophthalmic veins and, in classical teaching, with the cavernous sinus. Esthetics programs still warn about the danger triangle of the face (corners of the mouth up to the nasal bridge): do not extract infected lesions here; do not mash a pustule on the nose until it bleeds. Spreading facial infection is a medical referral, sometimes urgent.

Waxing near the eye. Medial brow sits near angular vessels. A skin tear or aggressive tweeze that causes an expanding hematoma at the medial canthus: stop, apply pressure per first aid, and refer if the orbit is involved or vision changes.

Lymph nodes (basins)

High-yield superficial nodes: occipital, posterior auricular, preauricular, submandibular, submental, superficial cervical. Enlarged, hard, fixed, or painful nodes without an obvious recent local issue in a client who came for a facial: do not massage them as a detox move. Refer.

Putting the four services together

Facial massage. Map muscles plus lymph plus nerves. Keep pressure light on eyelids; many protocols avoid direct globe pressure entirely. No deep work in the danger triangle on inflamed skin.

Extractions. Know foramina and the danger triangle. Even an “epidermis-only” chin comedone still sits over the mental nerve.

Waxing near the eye. Name orbicularis oculi, thin eyelid epidermis (section 2.1), almost no subcutis (section 2.2), lacrimal apparatus, and angular vessels. Stop for conjunctivitis, a stye, healing eyelid surgery, wax in the eye, or intake flags such as isotretinoin (Chapter 5). If wax enters the eye: stop, irrigate per training, urgent referral.

Always stop and refer when anatomy signals disease or emergency: suspected skin cancer, spreading infection, herpetic vesicles, unexplained paralysis, vision change, orbital swelling, or any lesion you would have to destroy living dermis to “get.” That discipline protects the client and your Georgia certificate of registration.