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Shoulder Muscles
Functional Anatomy: Muscle and Isolated Function
Muscle | Isolated Function |
---|---|
Latissimus Dorsi | Concentrically accelerates shoulder extension, adduction, and internal rotation |
Serratus Anterior | Concentrically accelerates scapular protraction |
Rhomboids | Concentrically produces scapular retraction and downward rotation |
Lower Trapezius | Concentrically accelerates scapular elevation |
Middle Trapezius | Concentrically accelerates scapular retraction |
Upper Trapezius | Concentrically accelerates cervical extension, lateral flexion, and rotation Concentrically accelerates scapular elevation |
Levator Scapulae | Concentrically accelerates cervical extension, lateral flexion, and ipsilateral rotation when the scapulae is anchored |
Pectoralis Major | Concentrically accelerates shoulder flexion (clavicular fibers0, horizontal adduction, and internal rotation |
Pectoralis Minor | Concentrically protracts the scapula |
Deltoid- Anterior, Middle, and Posterior | Anterior: Concentrically accelerates shoulder flexion and internal rotation Middle: Concentrically accelerates shoulder abduction Posterior: Concentrically accelerates shoulder extension and external rotation |
Biceps Brachii | Concentrically accelerates elbow flexion, supination of the radioular joint, and shoulder flexion |
Triceps | Concentrically accelerateselbow extension and shoulder extension |