Biomechanics of the hand flexion and extension

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The term wrist is applied to the upper limb region formed by all the carpal bones. The hand connects with the forearm through the radiocarpal (wrist) joint. However, the articular complex of the wrist consists of the following joints: the radiocarpal (wrist) joint, which is an ellipsoid (condyloid) joint formed between the radius and the lunate and scaphoid bones of the proximal carpal row and the midcarpal joint which is series of plane (gliding) joints between the carpal bones of the proximal and distal rows. Overall, the articular complex of the wrist allows two types of movements. Movements which happen in the sagittal axis are known as the flexion and extension. Flexion is an anterior movement during which the palmar surface of the hand moves closer to the anterior aspect of the forearm. The range of flexion is up to 85 degrees. Extension is a posterior movement during which the dorsal surface of the hand moves towards the posterior aspect of the forearm. This movement can also be performed up to 85 degrees. • Learn human anatomy fast! Visit Anatomy.app now! • https://anatomy.app

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