The infrapinatus muscle is a thick irregular rotator cuff muscle located on the back of your shoulder blade. It has a strong connection to the shoulder and along with teres minor, rotates your arm externally. Most importantly, in conjunction with the other rotator cuff muscles, it is responsible for dynamic stabilization of the shoulder joint, especially during upward movement of your arm.
The shoulder has less connective tissue structure than other major joints. The rotator cuff muscles, including infraspinatus, act as a sort of dynamic muscle/ligament hybrid to stabilize the shoulder joint as you move.
Of the important functions of infraspinatus is to provide force to seat the head of humerus when you extend your arm up.
Trigger points in your infraspinatus refer pain deep in the front part of the deltoids, and sometimes extending down the side of your arm past the elbow to the top and thumb side of your forearm and hand. Infraspinatus can also cause pain on the inside edge of your shoulder blade.
Infraspinatus trigger points are often involved with shoulder impingement syndromes and subacromial pain syndrome. Trigger point referrals from infraspinatus can initiate central sensitization leading to chronic shoulder pain.
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Structure
It is contained within the infraspinatus fascia. This is a tough sheet of connective tissue that lines the depression on the back of your scapula and completely envelops the muscle and separates it from the teres major and teres minor. Muscle fibers arise out of this depression is the shoulder blade and from the fascia itself. It originates from the inside 2/3 of this 'fossa' in the scapula and the fascia of the lower trapezius, rhomboids and serratus anterior. It progresses towards your shoulder where it develops a fascial connection with your rear deltoid.![](https://westsubpainrelief.com/wp-content/uploads/2020/02/shoulder-ligaments-400x220.jpg)
![](https://westsubpainrelief.com/wp-content/uploads/2020/02/infraspinatus-fibers.jpg)
- Almost the entire tendinous portion of the muscle is derived from the oblique (diagonal) part of the infraspinatus.
- The tendinous portion of the oblique part becomes longer and thicker towards the top.
- The uppermost part of the tendinous portion of the the diagonal part reaches the most forward edge of the greater tuberosity.
Relations
![](https://westsubpainrelief.com/wp-content/uploads/2020/02/Head-of-Humerus-200x240.jpg)
![](https://westsubpainrelief.com/wp-content/uploads/2020/02/rotator-cable-and-crescent-300x152.jpg)
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Variation
The tendon of this muscle is sometimes separated from the capsule of the shoulder-joint by a bursa, which may communicate with the joint cavity. The infraspinatus is frequently fused with the teres minor.Professional Treatment With Us
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Clearly, everyone is different. Many of us have additional challenges and complications. Naturally, we tailor our treatment plans to the individual. However, there are common foundations in this work with everyone.
Fortunately, if you are having similar issues, you may find that a just few treatment sessions helps! We will identify and treat root causes of your individual case.
Clearly, everyone is different. Many of us have additional challenges and complications. Naturally, we tailor our treatment plans to the individual. However, there are common foundations in this work with everyone.
We are licensed professionals. In addition, we all have additional training and certifications in advanced techniques. For instance, this includes trigger point therapy, fascial stretching, neuromuscular and movement therapy. Also we offer kinesio taping, myofascial release, cupping, acoustic compression, self-care classes and more. In fact, we often combine several of these techniques into a single session..
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