Humeroradial joint

A pivotal joint that facilitates the movement of the forearm.

The humeroradial joint is an articulation between the humerus, the long bone of the upper arm, and the radius, one of the two bones of the forearm. This joint allows for a wide range of motion in the forearm, including flexion, extension, and rotational movements. It plays a crucial role in the overall functionality of the elbow region.

Terminologia Anatomica

articulatio humeroradialis

System

Musculoskeletal system

Function

The primary function of the humeroradial joint is to enable the bending and straightening of the elbow, essential for various daily activities such as lifting objects and performing fine motor skills. Additionally, this joint allows for pronation and supination of the forearm, which involves rotating the palm up or down. These movements are vital for tasks like turning a doorknob or using tools. Its unique structure, featuring a spherical head of the radius that fits into a corresponding part of the humerus, allows for significant flexibility and a wide range of motion, making it crucial in activities requiring agility and coordination. The humeroradial joint works in conjunction with the entire elbow complex, including the humeroulnar joint and the proximal radioulnar joint, to provide stability and versatility to the arm.

Location

Located at the lateral aspect of the elbow, the humeroradial joint is formed where the distal end of the humerus meets the proximal end of the radius. Specifically, it is situated just above the elbow crease, where the forearm meets the upper arm. This joint is surrounded by a synovial membrane, which produces synovial fluid to lubricate the joint surfaces, enhancing its mobility while minimizing friction. The humeroradial joint is supported by several ligaments, including the radial collateral ligament, which provides additional stability, allowing for effective force transmission during arm movements.

Did You Know?

The humeroradial joint is one of the key joints that allow for the fine motor movements of the hand.
Injuries to the humeroradial joint can significantly impact daily tasks and activities, highlighting its importance in arm mobility.
The range of motion at the humeroradial joint can vary significantly between individuals, especially among athletes and musicians who depend on precision in their arm movements.