Which is a possible cause of joint hypermobility?

• A. Connective tissue disorder
• B. Fracture
• C. Muscle hypertrophy
• D. Nerve compression

Answer: (A)

Joint hypermobility comes from unusually lax ligaments and joint capsules, often because of connective tissue abnormalities. When a connective tissue disorder affects collagen or other matrix components, the tissues become weaker and less able to resist stretch, allowing joints to move beyond the typical range. This is why a connective tissue disorder is a common cause of hypermobile joints, as seen in conditions like Ehlers-Danlos syndrome.

Fracture isn’t a cause of hypermobility; it disrupts bone integrity and typically leads to immobilization during healing and a potential decrease in range of motion. Muscle hypertrophy tends to reinforce joints and limit excessive movement, not create it. Nerve compression affects sensation or motor function rather than altering the structural laxity that permits joint hyperextension.