Joint, shoulder
the scapula (the shoulder blade) and the humerus (the long bone of the upper arm). The end of the scapula, called the glenoid, is a socket into which the head of the humerus fits to form a flexible ball-and-socket joint.
The shoulder joint is cushioned by cartilage that covers the face of the glenoid socket and head of the humerus. The joint is stabilized by a ring of fibrous cartilage around the glenoid socket that is called the labrum. Ligaments connect the bones of the shoulder and tendons join the bones to surrounding muscles. The biceps tendon attaches the biceps muscle to the shoulder and helps stabilize the joint. Four short muscles that originate on the scapula pass around the shoulder where their tendons fuse together to form the rotator cuff.
The scapula is an unusually shaped bone. It extends up and around the shoulder joint at the rear to create a roof called the acromion and around the shoulder joint at the front to constitute the coracoid process.
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- Joints of the body, principal
acromioclavicular ankle (tibia-fibula and talus) atlantoaxial atlantooccipital calcaneocuboid carpometacarpal elbow (humerus, radius, and ulna) femur and tibia hip bone and femur intercarpal (proximal carpal, distal carpal, and the two rows of carpal bones with each other) intermetacarpals intermetatarsals interphalangeal intervertebral joints knee (femur, tibia, and patella) manubristernal metacarpophalangeal metatarsophalangeal radioulnar ribs, heads of ribs, tubercles […]
- Journal of Clinical Investigation
(JCI) A highly regarded journal of medical science that publishes “biologically significant findings of clinical relevance.” The JCI is the journal of the American Society for Clinical Investigation, an honor society of physician-scientists, physicians who are at the bedside, at the research bench, at the blackboard translating findings in the laboratory into the advancement of […]
- Journal of the American Medical Association
“To promote the science and art of medicine and the betterment of the public health.” JAMA carries original, generally well-documented, peer-reviewed medical articles on a diversity of clinical as well as laboratory topics.