Lesson 5: Muscles of Shoulder joint movements

There are 11 muscles involved in moving the shoulder: Supraspinatus, Infraspinatus, Teres minor, Subscapularis (rotator cuff) Latissimus Dorsi, Pectoralis Major, Teres Major, Deltoid, Coracobrachialis, Biceps Brachii, Triceps Brachii.

Muscles used for Flexion are: Pec Major, Anterior Deltoid, Coracobrachialis, Biceps Brachii.

Muscles used for Extension are: Latissimus Dorsi, Teres Major, Pectoralis Major, Triceps.

Muscles used for ABduction are: Supraspinatus, Middle Deltoid.

Muscles used for ADDuction are: Latissimus Dorsi, Teres minor, Teres Major, Pectoralis Major, Coracobrachialis, Triceps.

Muscles for medial rotation are: Latissimus Dorsi, Teres Major, Subscapularis, Anterior Deltoid, Pectoralis Major.

Muscles for Lateral rotation are: Infraspinatus, Teres Minor, Posterior Deltoid.

Remember that for muscles to make a movement you have your agonist, antagonist, synergistic muscles that work together. One muscle contracts, one muscle relaxes, another may assist.

**This video is for instructional purposes only.
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