GROSS ANATOMY

Detailed explanation-1: -The proximal radioulnar joint is a uniaxial joint, allowing movements in one degree of freedom; pronation-supination. In humans, this movement is unique for the upper limb.

Detailed explanation-2: -The distal radioulnar joint is a synovial joint between the distal ends of the radius and ulna. This is a uniaxial pivot joint that allows the movements in one degree of freedom; pronation-supination.

Detailed explanation-3: -The proximal radioulnar joint is a pivot type of synovial joint, which consists of the head of the radius articulating with the radial notch of the ulna.

Detailed explanation-4: -Structure. The proximal radioulnar joint is a synovial pivot joint. It occurs between the circumference of the head of the radius and the ring formed by the radial notch of the ulna and the annular ligament. The interosseous membrane of the forearm and the annular ligament stabilise the joint.