4.4 Myology: Muscles of the Head, Face and Neck
Key Takeaways
- The human body contains over 600 muscles, accounting for approximately 40% to 50% of total body weight.
- A muscle's origin is its fixed attachment to bone, the insertion is the movable attachment, and the belly is the contractile middle portion.
- Facial massage manipulations are directed from the insertion toward the origin to lift tissue rather than drag it downward.
- The epicranius consists of the frontalis, which raises the eyebrows, and the occipitalis, joined by the epicranial aponeurosis.
- The orbicularis oculi closes the eyelid, the orbicularis oris puckers the lips, the buccinator compresses the cheek, and the platysma extends from the chest and shoulder to the chin.
Last updated: August 2026
4.4 Myology: Muscles of the Head, Face and Neck
1. Myology: Muscular System of the Head, Face, and Neck
Myology is the study of the structure, function, and pathology of muscles. The human body contains over 600 muscles, accounting for approximately 40% to 50% of total body weight.
The Three Anatomical Parts of a Skeletal Muscle
Every skeletal muscle consists of three distinct functional parts:
- Origin: The fixed, stationary attachment point anchored closest to the skeleton or immovable bone.
- Belly: The middle, fleshy, contractile mass of the muscle containing active muscle fascicles.
- Insertion: The movable attachment point anchored furthest from the skeleton, attaching to movable bone, cartilage, or overlying dermal tissue.
[ORIGIN] ══════════════ [BELLY] ══════════════ [INSERTION]
(Fixed Bone Attachment) (Fleshy Mass) (Movable Skin/Bone)
▲ │
│◄──────── DIRECTION OF FACIAL MASSAGE ──────│
The Golden Rule of Facial Massage — Direction of Movement: In clinical esthetics, all facial massage strokes, manual manipulations, and microcurrent lifting glide vectors must ALWAYS proceed from the INSERTION toward the ORIGIN of the muscle. Massaging from origin to insertion stretches fragile muscular fibers and fascial attachments, causing microscopic tearing, loss of muscle tone, and premature dermal laxity.
Methods of Muscle Stimulation
Muscles can be stimulated by:
- Massage: Effleurage, petrissage, tapotement, and vibration.
- Electric Current: Microcurrent, Galvanic current, and Faradic modalities.
- Light Therapy: Infrared light and low-level laser/LED therapy.
- Heat Modalities: Warm towels, facial steamers, and paraffin.
- Chemical Agents: Targeted active serums and exfoliating acids.
- Nerve Impulses: Voluntary mental commands and involuntary reflex arcs.
Comprehensive Guide to Head, Face, and Neck Muscles
HEAD & NECK MUSCLES
│
┌─────────────────┬──────────┴──────────┬─────────────────┐
▼ ▼ ▼ ▼
Scalp Muscles Eye & Brow Mouth & Cheeks Mastication & Neck
• Frontalis • Orbicularis Oculi • Orbicularis Oris • Masseter / Temporalis
• Occipitalis • Corrugator • Zygomaticus Major • Platysma / SCM
• Epicranial Supercilii • Buccinator / • Trapezius
Aponeurosis • Procerus (Nose) Risorius / Mentalis
| Muscle Name | Anatomical Location | Primary Action / Facial Expression | Clinical Esthetic Application |
|---|---|---|---|
| Epicranius (Occipitofrontalis) | Broad muscle covering the cranium; consists of 2 bellies connected by the Galea Aponeurotica (Epicranial Aponeurosis) | Moves scalp forward and backward; raises eyebrows; creates horizontal forehead wrinkles | Scalp massage tension release; target for horizontal line smoothing |
| Frontalis | Anterior portion of epicranius over forehead | Elevates eyebrows, draws scalp forward, produces horizontal forehead lines | Upward massage strokes toward hairline prevent brow ptosis |
| Occipitalis | Posterior portion of epicranius over occipital bone | Draws scalp backward | Pressure point massage at skull base alleviates tension headaches |
| Corrugator Supercilii | Located beneath frontalis and orbicularis oculi, along eyebrow arch | Draws eyebrow down and medially; produces vertical frown lines ("11 lines") | Pinpoint petrissage reduces chronic tension between eyebrows |
| Orbicularis Oculi | Circular ring muscle encircling the entire orbital eye socket | Closes eyelids firmly; squinting; produces lateral "crow's feet" wrinkles | Gentle inward circle strokes around eye orbit (from temple under eye to inner corner) |
| Procerus | Covers the bridge of the nose | Depresses eyebrows; creates transverse horizontal wrinkles across bridge of nose | Smoothing strokes upward over bridge of nose toward glabella |
| Nasalis | Two-part muscle covering the nasal bridge and flare of nostrils | Compresses and dilates the nostrils | Gentle effleurage during sinus-relief treatments |
| Orbicularis Oris | Circular flat muscle band encircling the mouth and lips | Compresses, closes, puckers, and protrudes the lips ("kissing muscle") | Lip contouring; microcurrent lifting around perioral lines |
| Buccinator | Flat, thin muscle of the cheek between upper and lower jaw | Compresses cheeks inward; expels air ("blowing/trumpet muscle"); assists chewing | Deep petrissage of cheek tissue relieves clenching fatigue |
| Risorius | Muscle extending from parotid fascia to corner of mouth | Retracts angle of mouth laterally; produces a grin or fixed smile | Upward-outward cheek lifting strokes |
| Zygomaticus Major & Minor | Extend diagonally from zygomatic bone downward to angle of mouth | Elevate and pull corners of mouth upward and outward (smiling and laughing) | Direct upward lifting glides from mouth corners to zygomatic arch |
| Depressor Anguli Oris (Triangularis) | Extends along lower lateral chin to angle of mouth | Pulls corners of mouth downward in an expression of sadness or frowning | Upward lifting manipulations counteract downward perioral sagging |
| Mentalis | Located at the tip of the chin | Elevates and protrudes the lower lip; wrinkles the chin skin ("peach pit chin") | Circular friction and upward smoothing over the mental prominence |
| Masseter | Originates on zygomatic arch; inserts on mandibular ramus/angle | Elevates the mandible to close the jaw; powerful muscle of mastication | Relieving TMJ tension, bruxism tightness, and jawline contouring |
| Temporalis | Fan-shaped muscle situated over the temporal fossa | Closes jaw and retracts mandible; assists mastication | Temple massage relieving cranial tension |
| Platysma | Broad, thin muscular sheet extending from clavicle/chest to mandible and chin | Depresses lower jaw and lip; expresses fright or horror; tenses neck skin | Gentle upward effleurage along neck prevents downward dragging |
| Sternocleidomastoid (SCM) | Originates from sternum and clavicle; inserts onto mastoid process behind ear | Rotates head laterally; flexes neck forward when both contract | Key landmark for neck massage; avoid excessive deep carotid pressure |
| Trapezius | Large diamond-shaped muscle covering back of neck and upper/middle back | Elevates, depresses, and retracts scapula; extends the head backward | Décolleté, shoulder, and upper back massage relieving postural stress |
Test Your Knowledge
Which bone of the human skull is the largest, strongest bone of the face and forms the only freely movable joint in the skull?
A
B
C
D
Test Your Knowledge
Which cranial nerve serves as the chief sensory nerve of the face and also provides motor control for the muscles of mastication?
A
B
C
D