Elbow
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Elbow Anatomy Overview
The elbow is a complex hinge joint that allows the arm to bend and rotate, making it essential for various daily activities like lifting, throwing, and pushing. It is a key component for both strength and flexibility in the arm.
Bones of the Elbow
The elbow joint is formed by the connection of three bones: the humerus (upper arm bone), and the two forearm bones, the radius and ulna. These bones meet at the elbow to create two main joints – the humeroulnar joint, which allows bending and straightening, and the radioulnar joint, which enables rotation of the forearm.
Soft Tissues
Supporting the elbow bones are strong ligaments, tendons, and muscles. The ligaments, such as the ulnar collateral ligament and the radial collateral ligament, provide stability to the joint, preventing excessive movement. The tendons, like the biceps tendon and triceps tendon, attach muscles to the bones, enabling movement. Cartilage covers the ends of the bones to ensure smooth, frictionless motion.
Nerves and Blood Supply
The elbow’s primary nerves include the ulnar, median, and radial nerves, which provide sensation and control muscle movement in the forearm and hand. The ulnar nerve is often referred to as the “funny bone” when hit. Blood supply to the elbow comes from the brachial artery, ensuring proper circulation to the arm and hand.
