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Shoulder Muscles

Patient Information
Shoulder Anatomy
Shoulder Muscles
Shoulder MusclesShoulder Muscles
Superficial MusclesSuperficial Muscles
Deep MusclesDeep Muscles
Muscles of the Shoulder & ArmMuscles of the Shoulder & Arm

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Shoulder Muscles

The muscles of the shoulder either connect the scapula and clavicle to the trunk, or connect the clavicle, scapula and body wall to the proximal (top) end of the humerus. The trapezius, levator scapulae, and rhomboids originate from the base of the skull and/or spine and connect the scapula and clavicle to the trunk of the body. The pectoralis major, pectoralis minor, latissimus dorsi, teres major and deltoid connect to the proximal end of the humerus and anchor it to the body.
The most important shoulder muscles are the four rotator cuff muscles - the subscapularis, supraspinatus, infraspinatus and teres minor muscles - which connect the scapula to the humerus and provide support for the glenohumeral joint.
Muscles of the arm that enter into the shoulder complex are separated into anterior (flexor) and posterior (extensor) compartments. These include biceps brachii, triceps brachii and coracobrachialis.

These shoulder muscles can be separated into three important groups:

1. Superficial muscles (Extrinsic)

2. Deep muscles (Intrinsic)

3. Muscles of the shoulder & arm

 To see more on Shoulder Muscles see BodySmart:
  1. Muscles that move the Shoulder
  2. Muscles that move the Arm

The most posterior muscle and tendon of the rotator cuff. Externally rotates the shoulder in abduction.
Top muscle and tendon of the rotator cuff. Abducts the arm. It is the tendon that is most often torn.
The most anterior muscle and tendon of the rotator cuff. Internally rotates the shoulder.
at the back; behind
muscle and tendon of the rotator cuff. Externally rotates the arm. Lies between supraspinatus and teres minor.
bone of the upper arm - connecting the shoulder to the elbow
at the front; in front

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