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Navarro PTA O.I.A.N
Shoulder
Muscle | Origin | Insertion | Action | Nerve |
---|---|---|---|---|
Latissimus Dorsi | Spinous process of T7 through L5 (via thoracolumbar fascia), posterior surface of sacrum, iliac crest | Medial floor of bicipital groove of humerus | Shoulder extension, adduction, medial rotation, and hyperxtension | Thoracodorsal nerve |
Pectoralis Major | Medial third of clavicle, sternum, and costal cartilage of first 6 ribs | lateral lip of bicipital groove of humerus | Both: shoulder adduction, medial rotation, and horizontal adduction Clavicular portion: shoulder flexion to approximately first 60 degrees Sternal portion: shoulder extension to approximately first 60 degrees | lateral and medial pectoral nerve |
Brachialis | Distal half of humerus, anterior surface | Coronoid process and ulnar tuberosity of the ulna | elbow flexion | musculocutaneous nerve |
Biceps Brachii | Long head: supraglenoid tubercle of scapula Short head: coracoid process of scapula | Radial tuberosity of radius | Elbow flexion and forearm supination | musculocutaneous nerve |
Triceps | Long head: infraglenoid tubercle of scapula Lateral head: inferior to greater tubercle on posterior humerus Medial head: posterior surface of humerus | Olecranon process of ulna | Elbow extension | radial nerve |
Infraspinatus | infraspinous fossa of scapula | Greater tubercle of humerus | Shoulder lateral rotation and horizontal abduction | subscapular nerve |
Supraspinatus | Supraspinous fossa of scapula | Greater tubercle of humerus | Shoulder Abduction | subscapular nerve |
Subscapularis | subscapular fossa of scapula | Lesser tubercle of humerus | Shoulder medial rotation | Upper and lower subscapular nerve |
Teres Major | Inferior axillary border of scapula near the inferior angle | Medial lip of the bicipital groove of the humerus | Shoulder extension, adduction, and medial rotation | lower scapular nerve |
Teres Minor | axillary border of scapula | greater tubercle of humerus | Shoulder lateral rotation and horizontal abduction | axillary nerve |
Anterior Deltoid | lateral third of clavicle | Deltoid tuberosity | Shoulder abduction, flexion, medial rotation, and horizontal adduction | axillary nerve |
Middle Deltoid | Acromiom process | Deltoid tuberosity | shoulder abduction | axillary nerve |
Posterior Deltoid | Spine of scapula | Deltoid tuberosity | shoulder abduction, extension, hyperextension, hyperextension, lateral rotation, and horizontal abduction | axillary nerve |