Which type of contracture is named for involvement of joint structures?

• A. Arthrogenic
• B. Myogenic
• C. Neurogenic
• D. Fibrogenic

Answer: (A)

Contracture types reflect where the restriction originates. When the limitation comes from structures inside the joint itself—such as the joint capsule, ligaments, articular surfaces, or synovium—the condition is arthrogenic. Intra-articular problems like capsular tightness after injury, adhesions within the joint, or inflammatory changes can restrict motion even when the muscles and nerves are functioning normally, hence the name arthrogenic.

Other origins include myogenic, where the muscle-tendon unit itself shortens or stiffens; neurogenic, where nerve injury or altered neural input leads to abnormal muscle tone and contraction; and fibrogenic, where scar tissue forms in periarticular tissues restricting movement. Since this type of contracture is defined by involvement of joint structures, arthrogenic is the best fit.