What is the function of art Humeri?
These are the supraspinatus, infraspinatus, teres minor and subscapularis muscles. The function of this entire muscular apparatus is to produce movement at the shoulder joint while keeping the head of humerus stable and centralized within the glenoid cavity.
What is a glenohumeral joint?
The glenohumeral joint is a ball and socket joint that includes a complex, dynamic, articulation between the glenoid of the scapula and the proximal humerus. Specifically, it is the head of the humerus that contacts the glenoid cavity (or fossa) of the scapula.
What type of joints is the Articulatio Humeri?
The shoulder joint (or glenohumeral joint from Greek glene, eyeball, + -oid, ‘form of’, + Latin humerus, shoulder) is structurally classified as a synovial ball-and-socket joint and functionally as a diarthrosis and multiaxial joint….
How many Bursas are in the shoulder joint?
Within the shoulder, there are 8 bursae. This number makes the shoulder the place where more bursae are than any other bodily region. The primary shoulder bursae are the subcoracoid bursa, subacromial bursa, subdeltoid bursa, and subscapular bursa.
Where is the glenohumeral joint located?
The glenohumeral joint is what most people think of as the shoulder joint. It’s the major joint in the shoulder, where the rounded top, or head, of the humerus, nestles into a rounded socket of the scapula, called the glenoid. This ball-and-socket construction allows for circular movement of the arm.
What causes glenohumeral osteoarthritis?
Glenohumeral osteoarthritis develops due to degenerative damage in the shoulder cartilage. This cartilage provides a protective lining between the humeral head (the top of the humerus) and the shoulder socket.
What is Recessus Axillaris?
The joint capsule of the shoulder joint is relatively spacious and loose. Caudally in a relaxed position there exists a reserve zone about 1 cm long which is referred to as the axillary recess recessus axillaris.
Can subscapularis tear heal without surgery?
A subscapularis tear can often be managed and fully heal without surgery. If a tear is large or causes significant pain, you might need surgery. However, with rest and physical therapy, you should regain full use of your shoulder after surgery.
How do you treat subscapularis?
Most people with a torn subscapularis tendon need surgery for a good result. The procedure can be done with an open incision or arthroscopically through several portals (small puncture holes). The surgeon may find the tear is impossible to repair. But usually, the tendon is sutured back in place.
Does shoulder bursitis require surgery?
Surgery is sometimes needed to treat shoulder bursitis. This can be done using a small incision with a special, minimally invasive probe called an arthroscope. During the surgery, the inflamed bursa, some of the bone and any spurs are removed to create a larger space for the rotator cuff tendons.
What is the best exercise for shoulder bursitis?
Keeping your elbows straight, slowly raise your arms over your head. Raise them until you feel a stretch in your shoulders, upper back, and chest. Hold for 15 to 30 seconds. Repeat 2 to 4 times.
What muscles stabilize the glenohumeral joint?
Periscapular muscles serve to anchor the scapula allowing it to function as the base of the glenohumeral joint. This muscle group includes the pectoralis minor, serratus anterior, rhomboids, latissimus dorsi, and trapezius. Activation of these muscles during glenohumeral motion contributes to overall stability (36).
What muscles attach to the glenohumeral joint?
The glenohumeral joint is where the ball (humeral head) and the socket (the glenoid) meet. The rotator cuff connects the humerus to the scapula and is made up of the tendons of four muscles, the supraspinatus, infraspinatus, teres minor and the subscapularis.
What is the glenohumeral joint of the shoulder?
The glenohumeral joint is the main joint of the shoulder. Here, the glenoid on the scapula and the head of the humerus come together. The fairly flat socket of the glenoid surrounds only 20% – 30% of the humeral head. Because of its poor fit, this joint relies heavily on the surrounding soft tissue for support.
What is the function of the glenohumeral ligament?
Glenohumeral ligaments. Reinforcing the anterior glenohumeral joint capsule, the superior, middle, and inferior glenohumeral ligaments play different roles in the stability of the head of the humerus depending on arm position and degree of rotation.
What protects the capsule of the glenohumeral joint?
The joint capsule is protected, specifically from wear, by bursae which are fluid filled sacs that provide cushioning between structures. Associated with the glenohumeral joint are a number of bursae that protect the joint capsule from excessive wear from overlying structures.
What is the range of movement of the glenohumeral joint?
Movements The glenohumeral joint has a greater range of movement (RoM) than any other body joint. Being a ball-and-socket joint, it allows movements in three degrees of freedom (average maximum glenohumeral active RoM is shown in brackets); Flexion (110°) – extension (60°)