Muscles / Shoulders
Middle deltoid
- Shoulders
- Shoulder & scapula
- Superficial layer
Also called acromial part of deltoid, lateral deltoid.
Part of Deltoid.
Anatomy
- Origin
- Lateral margin of the acromion
- Insertion
- Deltoid tuberosity of the humerus
Actions
- Abducts the arm (after the first 15° assisted by supraspinatus)
Exercises that train it most
Also trained by
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