![]() ![]() One study has indicated that arthroscopic surgery for full-thickness supraspinatus tears is effective for improving shoulder functionality. Both ultrasound and MRI are now effective methods of diagnosis.Īntero-posterior projectional radiography of the shoulder may demonstrate a high-riding humeral head, with an acromiohumeral distance of less than 7 mm. Connected pathologies include acromial impingement, frozen shoulder, and poor sleep, especially on the side. Bad posture and age are leading risk factors, with a high prevalence of unsymptomatic partial and full tears, as well as symptomatic syndromes with chronic pain. ![]() The supraspinatus forms part of the rotator cuff and is one of its most frequently damaged components, whether from acute injury or gradual degeneration. Beyond 15 degrees the deltoid muscle becomes increasingly more effective at abducting the arm and becomes the main propagator of this action. The supraspinatus works in cooperation with the deltoid muscle to perform abduction, including when the arm is in an adducted position. It independently prevents the head of the humerus from slipping inferiorly. The supraspinatus muscle performs abduction of the arm, and pulls the head of the humerus medially towards the glenoid cavity. The supraspinatus muscle is innervated suprascapular nerve (C5-6) of the upper trunk of the brachial plexus. The tendon blends with the shoulder joint capsule. The supraspinatus muscle tendon passes laterally beneath the cover of the acromion. The supraspinatus tendon inserts onto the superior facet of the greater tubercle of the humerus. The supraspinatus muscle arises from the medial two-thirds supraspinous fossa of the scapula. The spine of the scapula separates the supraspinatus muscle from the infraspinatus muscle, which originates below the spine. It is one of the four rotator cuff muscles and also abducts the arm at the shoulder. ![]() The supraspinatus (plural supraspinati) is a relatively small muscle of the upper back that runs from the supraspinous fossa superior portion of the scapula (shoulder blade) to the greater tubercle of the humerus. ![]()
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