Which joint type is described as triaxial or multiaxial?

The ball and socket joint is classified as triaxial or multiaxial because it allows movement in three different planes: flexion and extension, abduction and adduction, and rotation. This versatility enables a wide range of motion, making it distinct from other joint types that offer more limited movement.

In a ball and socket joint, the rounded end of one bone (the ball) fits into a cup-like socket of another bone, which permits such extensive mobility. Classic examples of ball and socket joints include the shoulder and hip joints, where actions such as raising arms overhead and rotating hips occur.

Understanding this function is essential for recognizing how various joint types contribute to human movement and stability in physical activity.