A person with a shorter ulna than radius can also have a higher chance of developing Kienbock’s disease. Rheumatoid arthritis (RA) is a common type of arthritis that causes symptoms such as misshapen finger joints, pain, and stiffness. Cartilage is a smooth surface that allows for gliding. The finger bones are known as phalanges (singular ~ phalanx). When cartilage is healthy, there is a cushioning effect of the cartilage that absorbs and evens out the forces across the joint. It’s a synovial joint that allows for a lot of movement; it’s formed where the head of the ulna articulates with the ulnar notch of the radius. The sternoclavicular joint is the junction of the sternum (breastbone) and clavicle (collarbone). This joint is involved with raising and lowering the arm and moving the arm forward and backward. Types of Finger Arthritis. When the muscle contracts, the tendon is pulled and the finger moves at the respective joint. Each phalanx has three parts – the base, shaft and head. There is only one metacarpophalangeal joint (MCP joint) which lies between the proximal phalanx and metacarpal (hand bone). All the... Finger Joints. There are 14 phalanges on each hand. There are no tendons that attach to this joint area. Common problems with this joint include stiffness, dislocation, labral tears, bursitis, rotator cuff tears, long head of biceps tendonitis or tears, subacromial impingement, proximal humeral fractures, and arthritis. Many shoulder separations are treated without surgery, but some may require surgery to reconstruct the coracoacromial or coracoclavicular ligaments. The first is by location. You may recognize them as your knuckles. Wrist Joints. The scaphotrapeziotrapezoid joint is at the base of the thumb in the wrist. Common problems at this joint include Mallet Finger, Jersey Finger, arthritis, mucous cysts, and fractures. Pronation and supination occur at this joint, which is the act of rotating your palms to face upward and downward.
This permits the hand to change its shape and adapt to grasping objects of different size and shape. You can spread your fingers more more easily when they are straightened rather than bent because the collateral ligaments are loose when the finger is extended. Pocket-hole joinery is where a basic butt joint is fastened using screws that are at … When cartilage is healthy, there is a cushioning effect of the cartilage that absorbs and evens out the forces across the joint. There is also a fourth bone in the first row of wrist bones called the pisiform, but it does not connect to either the radius or ulna. MP joints are important for both power grip and pinch activities; they are where the fingers move with respect to the hand. One specific type is the Boutonniere deformity. There are three major ligaments, the acro-mioclavicular, coracoacromial, coracoclavicular. Some Clinical Anatomy Highlights of the Thorax, Abdomen, and Pelvis, Important Clinical Anatomy of the Head, Neck, and Back, Crucial Clinical Anatomy of the Upper and Lower Extremities. The thumb CMC joint is one of the most common areas in the hand and wrist to develop arthritis. Common problems at this joint include Mallet Finger, Jersey Finger, arthritis, mucous cysts, and fractures. There is an articular disc of fibrocartilage within the joint. Because this joint is more mobile, it is more common to have a fracture or dislocation of this joint. The MP joints allows you to bend and flex your fingers, spread your fingers, and bring the fingers together. The joints have a synovial membrane surrounded by fibrous joint capsules. The carpometacarpal joints are synovial joints between the distal carpal bones and the metacarpals, and the intermetacarpal joints are between the metacarpals. The ulnocarpal joint includes the ulna, one of the forearm bones, as well as the lunate and triquetrum. It becomes stiff easily after injury. Occasionally, joint pain can be caused by a CMC boss.