AssessmentsAnatomy of the radioulnar joints
Content Reviewers:Scott Caterine, BSc (Hons.), MSc, MB, BCh, BAO (Hons.)
Contributors:Ursula Florjanczyk, MScBMC, Alaina Mueller, Sam Gillespie, BSc, Evode Iradufasha, MD, Viviana Popa, MD
This is gonna be short and sweet, so let’s dive right in!
The two articulating surfaces are covered by a synovial membrane, over which lies the joint capsule.
Next up, in the distal forearm, the radius and the ulna form another pivot type of synovial joint called the distal radioulnar joint, which is also covered by a fibrous joint capsule lined internally with a synovial membrane.
The articulating surfaces are mainly bound together by a fibrocartilaginous structure called the articular disc, which is triangular in shape, so it’s also known as the triangular ligament.
The distal radioulnar joint is reinforced by the two important ligaments: the anterior and the posterior ligaments.