1. Platysma
- Origin: subcutaneous tissue of infraclavicular and supraclavicular regions
- Insertion: base of mandible; skin of cheek and lower lip; angle of mouth (modiolus); orbicularis oris
- Action: depresses mandible; tenses skin of inferior face and neck
2. Mentalis
- Origin: body of mandible (anterior to roots or inferior incisors)
- Insertion: skin of chin (mentolabial sulcus)
- Action: elevates and protrudes lower lip; elevates skin of chin
3. Orbicularis Oris (Oral Sphincter)
- Origin: medial maxilla and mandible; deep surface of perioral skin; angle of mouth (modiolus)
- Insertion: mucous membrane of lips
- Action: Tonus closes oral fissure; phasic contraction compresses and protrudes lips (kissing) or resists distension (when blowing)
4. Corrugator Supercilii
- Origin: medial end of superciliary arch
- Insertion: skin superior to middle of supraorbital margin and superciliary arch
- Action: draws eyebrow medially and inferiorly, creating vertical wrinkles above nose
5. Orbicularis Oculi
- Origin: medial orbital margin; medial palpebral ligament; lacrimal bone
- Insertion: skin around margin of orbit; superior and inferior tarsal plates
- Action: closes eyelids: palpebral part gently; orbital part tightly
6. Occipitofrontalis
- Origin: epicranial aponeurosis
- Insertion: skin of eyebrow, muscles of forehead
- Action: elevates eyebrows, pulls scalp anteriorly and wrinkles skin of forehead