Final answer:
Radial deviation or radial flexion is the movement of the wrist towards the thumb side, essential for gripping and fine motor tasks. Complications from fractures of the distal radius bone affecting the radiocarpal joint can include loss of motion, pain, and arthritis. Surgery may be necessary for proper healing of certain fractures.
Step-by-step explanation:
Radial Deviation and Radial Flexion
Radial deviation of the wrist, also known as radial flexion, refers to the movement of the wrist towards the thumb, or the radial side of the forearm. This motion is facilitated by muscles such as the flexor carpi radialis, which bends the wrist towards the body and tilts the hand to the side away from the body, and the extensor carpi radialis brevis, which extends and abducts the hand at the wrist. These motions are important for the effective gripping of objects and the performance of fine motor tasks.
Impact of Distal Radius Fractures
When a fracture occurs at the distal radius and involves the joint surface of the radiocarpal joint of the wrist, it can lead to complications such as loss of motion, decreased strength, pain during movement, and potential long-term issues like arthritis. The styloid process of the radius, which provides attachment for ligaments, could also be affected, influencing the stability of the wrist joint. Surgery may be required in the case of a Colles fracture to ensure proper alignment and healing to maintain wrist function.