Supraspinatus muscle

Supraspinatus muscle is a muscle that is part of the rotator cuff group, located in the shoulder. It is situated in the supraspinatus fossa, a concave depression in the rear portion of the scapula, or shoulder blade. The primary function of the supraspinatus muscle is to assist in the abduction of the arm at the shoulder joint.

Anatomy

The supraspinatus muscle originates from the supraspinatus fossa, a concave depression in the superior portion of the scapula, and inserts into the greater tubercle of the humerus. It is one of the four muscles that make up the rotator cuff, along with the infraspinatus muscle, teres minor muscle, and subscapularis muscle.

Function

The primary function of the supraspinatus muscle is to assist in the abduction of the arm at the shoulder joint. It also helps to stabilize the shoulder joint by keeping the head of the humerus in the glenoid cavity during arm movement.

Clinical significance

Injury to the supraspinatus muscle or its tendon, such as a rotator cuff tear, can cause pain and loss of function in the shoulder. This is a common injury in athletes and older adults. Treatment may include physical therapy, medication, or surgery.

See also

• Rotator cuff
• Shoulder
• Scapula
• Humerus

External links

• Supraspinatus muscle at PubMed Health
• Supraspinatus muscle at InnerBody.com

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  Supraspinatus muscle back view

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  Supraspinatus muscle diagram

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  Supraspinatus muscle animation

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  Arm muscles back view with numbers

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  Shoulder motion with rotator cuff (supraspinatus)

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  Shoulder joint diagram

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  Shoulder joint back view