Going deeper into the shoulder we finally get down to the bones. Let’s have a look at the pectoral girdle, including the scapula, clavicle and the proximal parts of the humerus. There are a bunch of ligaments and joints, but most things around here are fairly sensibly named.

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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

Anatomy of the clavicle and scapula. Check out the 3D app at http://AnatomyLearning.com. More videos available on http://AnatomyZone.com.

Check out this updated skeletal anatomy tutorial on the clavicle and scapula. In this episode we take you through the important landmarks to remember on these bones. We hope you enjoy this tutorial and find it useful for your learning!

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