click below
click below
Normal Size Small Size show me how
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 |