In this tutorial, we will briefly discuss and name the muscles of the shoulder joint and girdle. Grab some quick facts on each shoulder muscle right here: https://khub.me/y5vf2
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The rotator cuff muscles are perhaps the most important members of the muscles of the shoulder joint, and are essential to the healthy functioning of the glenohumeral joint. They are a set of four muscles that run from the scapula to the humerus. This group of muscles may also be referred to as the SITS muscles: the supraspinatus, infraspinatus, teres minor, and subscapularis.
Many other muscles act upon the glenohumeral joint. Here are some examples, arranged by order of their associated function:
Flexion – Pectoralis major, deltoid (Prime movers), Coracobrachialis, biceps brachii (Accessory muscles)
Extension- Deltoid (Prime mover), Teres major, latissimus dorsi , long head of biceps brachii (Accessory muscles)
Abduction- Deltoid (Prime mover), Supraspinatus (Accessory muscles)
Adduction- Pectoralis major, latissimius dorsi (Prime movers), Teres major, long head of triceps brachii (Accessory muscles)
Medial Rotation- Subscapularis (Prime mover), Pectoralis major, deltoid, latissimus dorsi, teres major (Accessory muscles)
Lateral Rotation- Infraspinatus (Prime mover), Teres major, deltoid (Accessory muscles)
Want to test your knowledge on muscles of the shoulder joint? Take this quiz:
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Read more on shoulder region as a whole, including the bones, ligaments, muscles and related clinical conditions in this great article:
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For more engaging video tutorials, interactive quizzes, articles and an atlas of Human anatomy and histology, go to https://khub.me/la4gd
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