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The acromioclavicular joint, is the joint at the top of the shoulder. It is the junction between the acromion (part of the scapula that forms the highest point of the shoulder) and the clavicle. [1] It is a plane synovial joint. The acromioclavicular joint allows the arm to be raised above the head.
The acromioclavicular joint and sternoclavicular joint also play a role in shoulder movements. [3] White hyaline cartilage on the ends of the bones (called articular cartilage) allows the bones to glide and move on each other, and the joint space is surrounded by a synovial membrane. Around the joint space are muscles - the rotator cuff, which ...
The acromioclavicular joint provides the ability to raise the arm above the head. This joint functions as a pivot point (although technically it is a gliding synovial joint), acting like a strut to help with movement of the scapula resulting in a greater degree of arm rotation.
Superior acromioclavicular ligament [ edit ] This ligament is a quadrilateral band, covering the superior part of the articulation, and extending between the upper part of the lateral end of the clavicle and the adjoining part of the upper surface of the acromion .
Joint From To Description Humeroulnar joint: trochlear notch of the ulna: trochlea of humerus: Is a simple hinge-joint, and allows of movements of flexion and extension only. Humeroradial joint: head of the radius: capitulum of the humerus: Is a ball-and-socket joint. Superior radioulnar joint: head of the radius: radial notch of the ulna
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Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... Acromioclavicular joint; Amphiarthrosis; Articular disc;
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