Which type of joint is also known as reciprocal reception?

Correct option is B

The correct answer is (b) A saddle joint, also known as a sellar joint or reciprocal reception joint, is a type of synovial joint found in the human body. It is characterized by its unique shape, which resembles a saddle or the letter "C." Saddle joints are classified as biaxial joints, meaning that they allow movement in two planes: flexion-extension and abduction-adduction. This versatility of movement makes saddle joints well-suited for facilitating a wide range of motions in the body.The term "reciprocal reception" refers to the complementary shapes of the articulating surfaces of the bones that form a saddle joint. In a saddle joint, one bone has a convex surface, while the other bone has a concave surface. These surfaces fit together like two interlocking puzzle pieces, allowing for reciprocal movement in multiple directions.Anatomically, the best example of a saddle joint in the human body is the first carpometacarpal joint, also known as the thumb carpometacarpal joint. This joint is formed by the articulation between the trapezium bone of the wrist and the base of the first metacarpal bone of the thumb. The trapezium bone has a concave, saddle-shaped articular surface, while the base of the first metacarpal bone has a convex, saddle-shaped articular surface. This unique arrangement of articular surfaces enables the thumb to move in multiple directions, including flexion-extension, abduction-adduction, and circumduction.The reciprocal reception characteristic of saddle joints allows for a wide range of movement while providing stability and support to the joint. The complementary shapes of the articulating surfaces help prevent dislocation and ensure smooth and efficient movement. In addition to the first carpometacarpal joint, saddle joints are also found in other areas of the body, such as the sternoclavicular joint (between the sternum and clavicle) and the metacarpophalangeal joints (between the metacarpal bones and proximal phalanges of the fingers).