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Supraspinatus

Region

Origin & Insertion

['Origin: Supraspinous fossa of scapula', 'Insertion: Superior facet of greater tubercle of humerus']

Synergistic Muscles

['Deltoid', 'Infraspinatus']

Joints

['Glenohumeral joint']

Primary Actions

['Initiates shoulder abduction (first 15°)']

Nerve & Spinal Segment

Suprascapular nerve

Brachial plexus; C5–C6

Interesting

Most commonly torn rotator cuff muscle. [Gray's Anatomy]

Reversal of Action

Raise thoracic cage with fixed humerus

Common Dysfunctions

Shoulder impingement, rotator cuff tear

How to Stretch

Arm across body with downward pressure.

Trigger Points

How to Strengthen

Scaption with light resistance.

Concentric Action

Initiate shoulder abduction (first 15°)

Applications:

Frequently injured in rotator cuff tears; early-stage rehab muscle

Eccentric Action

Lower arm from abduction

Isotonic Action

Lateral raises, empty can exercise

Related Conditions

['Shoulder impingement', 'Subacromial bursitis']

Isometric Action

Hold arm in slight abduction

Exercise Ideas

['Scaption raises', 'Wall angels', 'Isometric abduction holds']

Related Blogs

Images

Videos

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