Which is the origin of the supraspinatus?

Asked by: Prof. Modesta Mohr
Score: 4.7/5 (6 votes)

Origin. The supraspinatus muscle arises from the supraspinous fossa, a shallow depression in the body of the scapula above its spine. The supraspinatus muscle tendon passes laterally beneath the cover of the acromion.

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Secondly, What is the origin bone for the supraspinatus muscle?

The supraspinatus muscle originates from the supraspinous fossa, which is a concave surface at the top of the scapula. From the supraspinous fossa of the scapula, the supraspinatus muscle then extends laterally (outward) and inserts onto the humerus, which is the long bone that makes up the upper arm.

Accordingly, Which is the origin of the infraspinatus?. Origin. The infraspinatus fossa of scapula, with some fibres arising from the infraspinatous fascia which covers the muscle and separates it from Teres Major and Teres Minor.

Likewise, What is the supraspinatus?

Supraspinatus is the smallest of the 4 muscles which comprise the Rotator Cuff of the shoulder joint specifically in the supraspinatus fossa. It travels underneath the acromion.

What is the location of the supraspinatus?

The supraspinatus muscle, the most superiorly located of the rotator cuff muscles, resides in the supraspinous fossa of the scapula, superior to the scapular spine.

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Where is supraspinatus pain felt?

The supraspinatus muscle assists abduction of the arm and stabilization of the humerus head during arm movements. TrPs within the supraspinatus muscle elicit a referred pain felt as deep pain around the shoulder, particularly over the mid-deltoid region.

What action does the supraspinatus perform?

Action. Contraction of the supraspinatus muscle leads to abduction of the arm at the shoulder joint. It is the main agonist muscle for this movement during the first 15 degrees of its arc.

How do you fix a supraspinatus tear?

Surgery to repair a torn rotator cuff most often involves re-attaching the tendon to the head of humerus (upper arm bone). A partial tear, however, may need only a trimming or smoothing procedure called a debridement. A complete tear is repaired by stitching the tendon back to its original site on the humerus.

Can a full thickness tear of the supraspinatus heal without surgery?

Even though most tears cannot heal on their own, good function can often be achieved without surgery. If, however, you are active and use your arm for overhead work or sports, then surgery is most often recommended because many tears will not heal without surgery.

Why is supraspinatus most commonly injured?

The supraspinatus tendon of the rotator cuff is involved and affected tendons of the musculoskeletal system and becomes degenerated, most often as a result of repetitive stresses and overloading during sports or occupational activities.

What is the function of infraspinatus?

The infraspinatus muscle's action on the shoulder is primarily through its function as a rotator cuff muscle providing glenohumeral stability. The rotator cuff applies compression upon the head of the humerus that allows for the stabilization of the humeral head during shoulder abduction.

What bone is being pulled by the infraspinatus?

The infraspinatus muscle assists external rotation of the arm and stabilization of the humerus head during arm movements.

What movement does the subscapularis muscle perform?

The subscapularis rotates the head of the humerus medially (internal rotation) and adducts it; when the arm is raised, it draws the humerus forward and downward. It is a powerful defense to the front of the shoulder-joint, preventing displacement of the head of the humerus.

How do I strengthen my supraspinatus?

Using the criteria that the best exercise to isolate and strengthen the supraspinatus should maximize supraspinatus activity while minimizing deltoid activity, the researchers determined that shoulder external rotation at 0° of abduction with an elastic band and prone external rotation were preferable.

How long is the supraspinatus tendon?

The average length of the supraspinatus was 14.5 cm (range, 12.4–16.8 cm), with the average length of the posterior tendinous portion from the insertion being 2.8 cm (range, 2–3.7 cm) (Table 1).

What should I avoid with a supraspinatus tear?

Avoid any extreme ranges of motion in your shoulders. Exercises like behind-the-neck shoulder presses, upright rows, or any exercises that require you to use your upper arms behind your torso. When attempting any exercises with an injured shoulder, make sure you keep your range of motion limited to what's comfortable.

How do you treat a full thickness tear of the supraspinatus tendon?

A combination of physiotherapy, corticosteroid injections, and/or NSAIDs are often suggested as first line interventions for patients with a symptomatic RTC tear, although there may not be an abundance of level 1 studies to support the use of these interventions.

Does supraspinatus tear need surgery?

Well, the answer is “no.” There's no need to do surgery to repair the torn rotator cuff. Effective non-surgical treatments include: Steroid injections.

How long does it take for a supraspinatus tear to heal?

In majority of the recovery can take 4 to 6 months or longer, depending on the size of the tear. Most activities can be resumed at 6 months, however the rotator cuff will heal for up to a year.

How painful is a supraspinatus tear?

Symptoms of a supraspinatus tear include a sharp pain in the shoulder at the time of injury. There will be a pain when the arm is rotated outwards and upwards. There is likely to be an increase in pain and weakness when the arm is raised sideways between a 60-degree arc.

What does the supraspinatus tendon attached to?

The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus.

Is a supraspinatus tear the same as a rotator cuff tear?

A supraspinatus tear is a tear or rupture of the tendon of the supraspinatus muscle. The supraspinatus is part of the rotator cuff of the shoulder. Most of the time it is accompanied with another rotator cuff muscle tear.