Muscles / Head & neck
Platysma
- Head & neck
- Neck
- Superficial layer
Anatomy
- Origin
- Subcutaneous tissue over the upper pectoralis major and deltoid
- Insertion
- Base of the mandible, skin of the cheek and lower lip, modiolus
- Nerve
- Facial nerve (CN VII), cervical branch
Actions
- Depresses the mandible against resistance
- Draws the corners of the mouth down
- Tenses the skin of the neck
References (4)
- Standring S, ed. Elsevier. Gray's Anatomy: The Anatomical Basis of Clinical Practice. 42nd ed.
- Dalley AF, Agur AMR. Wolters Kluwer. Moore's Clinically Oriented Anatomy. 9th ed.
- Neumann DA. Elsevier. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed.
- Betts JG, Young KA, Wise JA, et al. OpenStax (free, openly licensed textbook). Anatomy and Physiology 2e