Diagram of thumb and tendons

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In addition to its complex bone structure, the wrist also contains a network of ligaments, tendons, nerves, and blood vessels. The wrist consists of several ligaments and tendons that help provide strength and flexibility to the hand. The wrist contains a network of ligaments.

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The hand and wrist are made up of many different bones, muscles and ligaments that enable a wide range of movements. The wrist is formed where the two bones of the forearm — the radius the larger bone on the thumb side of the arm and the ulna the smaller bone on the pinky side — meet the carpus. Rather than a single joint, the wrist is actually made up of multiple joints where the bones of the arm and hand meet to allow movement.

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Extensor tendons, located on the back of the hand and fingers, allow you to straighten your fingers and thumb see Figure 1. These tendons are attached to muscles in the forearm. As the tendons continue into the fingers, they become flat and thin.

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X-rays of the hand are requested frequently, particularly at the Emergency Assistance department. See also figure 1. Figure 1. For a PA image, the hand lies flat on the x-ray plate, at the level of the shoulder with the elbow in 90 degrees flexion.

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The muscles of the hand are the skeletal muscles responsible for the movement of the hand and fingers. The muscles of the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. The extrinsic muscle groups are the long flexors and extensors.

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Did you know that the tendons attached to your thumb run all the way up your forearm? There are four thumb tendons:. Learn more about anatomy of the fingers, hand, wrist, arm and shoulder at www.

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Chung MD The normal voluntary movements of the hand and finger require exquisite precision and balance in both position and force generation. The very basic elements of the fine motor action elicited by the hand and finger involve flexion and extension and require the integrity and orchestration of the components of the tendon units. In the finger and hand, perhaps more than in any other location in the body, a detailed and intimate understanding of anatomy is crucial for lesion localization, directing clinical management, and predicting long-term prognosis. It is MRI that has emerged as a powerful tool in the identification and characterization of lesions of the extensor and flexor tendons of the hand and finger as a result of its excellent soft tissue contrast and multiplanar imaging capabilities.

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Language: English Chinese. Hand injuries are very common in sports, such as skiing and ball sports. One of the major reasons causing hand and finger deformity is due to ligament and tendon injury.

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Tendonitis is inflammation of a tendon, a thick, tough cord of tissue that connects muscles to bones. Tendonitis can affect any tendon in the body, causing swelling, pain and discomfort. Tendonitis may be the result of overdoing a physical activity, especially if you are not accustomed to it. The most common forms of tendonitis are:.

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