What type of synovial joint is the glenohumeral joint?
What type of synovial joint is the glenohumeral joint?
ball-and-socket synovial joint
The glenohumeral joint is a highly moveable ball-and-socket synovial joint that is stabilized by the rotator cuff muscles that attach to the joint capsule, as well as the tendons of the biceps and triceps brachii. The humeral head articulates with the glenoid fossa of the scapula.
Is glenohumeral joint cartilaginous or synovial?
The glenohumeral (GH) joint is a true synovial ball-and-socket style diarthrodial joint that is responsible for connecting the upper extremity to the trunk. It is one of four joints that comprise the shoulder complex. This joint is formed from the combination of the humeral head and the glenoid fossa of the scapula.
What stabilizes the glenohumeral joint?
The joint is stabilized by a ring of fibrous cartilage surrounding the glenoid, called the labrum. the joint. Four short muscles originate on the scapula and pass around the shoulder where their tendons fuse together to form the rotator cuff.
What is glenohumeral acromioclavicular joint?
The AC joint is the point where the collarbone, or clavicle, meets the acromion, which is the tip of the shoulder blade. The glenohumeral joint is the point where the top of the arm bone, or humerus, meets the shoulder blade, or scapula. Osteoarthritis is more commonly found in the AC joint.
What is a glenohumeral joint injection?
Glenohumeral joint injection Used for pain relief of shoulder arthritis and frozen shoulder affecting the shoulder. Procedure. Posterior Approach: The patient sits with their arm resting at their side with the shoulder in neutral rotation resting on their lap.
What muscles flex the glenohumeral joint?
The prime flexors of the glenohumeral joint are the deltoid (anterior fibers) and pectoralis major (clavicular fibers) muscles. While coracobrachialis and the long head of biceps brachii assist as weak flexor muscles.
What type of synovial joint is the phalanx phalanx?
Interphalangeal joints of the hand
| Type | Synovial hinge joint; uniaxial |
|---|---|
| Articular surfaces | Head of proximal phalanx, base of middle phalanx, head of middle phalanx, and base of distal phalanx |
| Ligaments | Medial collateral ligament, lateral collateral ligament |
| Innervation | Proper palmar digital nerves |
What is glenohumeral ligament?
In human anatomy, the glenohumeral ligaments (GHL) are three ligaments on the anterior side of the glenohumeral joint (i.e. between the glenoid cavity of the scapula and the head of the humerus; colloquially called the shoulder joint).
Why is glenohumeral joint unstable?
The glenohumeral joint is inherently an unstable joint given the fact that the ball is significantly larger than its socket and that the socket itself is very shallow. What makes this joint stable is the muscles of the rotator cuff along with the ligaments or joint capsule.
How does the glenohumeral joint remain stable during movement?
We have found that glenohumeral stability requires that there be a socket into which the ball can be pressed and that the muscles around the joint work in a balanced way to press the humeral head into the glenoid (see figures 4 and 5). The normal joint is in fact quite loose.
Is the acromioclavicular joint a synovial joint?
The acromioclavicular joint is a diarthrodial joint defined by the lateral clavicle articulating with the acromion process as it projects anteriorly off the scapula. The AC joint is a plane type synovial joint, which under normal physiological conditions allows only gliding movement.
What is glenohumeral synovitis?
Glenohumeral synovitis is a rare complication of vaccination that can lead to shoulder dysfunction and prolonged pain.
Is the glenohumeral joint synovial?
Glenohumeral joint. The glenohumeral joint is a synovial joint between the head of the humerus and the glenoid.
Is the glenohumeral a ball and socket joint?
The glenohumeral joint is structurally a ball-and-socket joint and functionally is considered a diarthrodial, multiaxial, joint[1]. The glenohumeral articulation involves the humeral head with the glenoid cavity of the scapula, and it represents the major articulation of the shoulder girdle[2].
What is the glenohumeral articulation of the shoulder?
The glenohumeral articulation involves the humeral head with the glenoid cavity of the scapula, and it represents the major articulation of the shoulder girdle.[2] The latter also includes minor articulations of the sternoclavicular (SC), acromioclavicular (AC), and scapulothoracic joints.
What is the range of movement of the glenohumeral joint?
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°) Abduction (120°) – adduction (0°)
