Which synovial joint is described as having an elliptical convex head in an elliptical concave socket?

The described synovial joint with an elliptical convex head and an elliptical concave socket is the ellipsoidal joint, also known as the condyloid joint. This joint type allows for movement in two planes, presenting flexion and extension, as well as abduction and adduction. It is characterized by one bone fitting into an elliptical cavity of another, promoting a greater range of motion compared to hinge joints, which typically allow only flexion and extension in one plane. The design of the ellipsoidal joint is instrumental for activities requiring multi-directional movement, such as in the wrist joint, where the radius meets the carpal bones. This unique structural configuration provides both stability and flexibility, accommodating various movements while maintaining joint integrity.