The rotator cuff tendons blend with which structures to contribute to static stability?

• A. Joint capsule
• B. Ligaments
• C. Synovial membrane
• D. Articular cartilage

Answer: (B)

The key idea is how passive, non-muscular structures contribute to keeping the shoulder centered when it’s not actively carrying a load. The rotator cuff tendons merge with the surrounding capsuloligamentous complex, so their fibers blend with the joint capsule and its ligaments. This integration creates a continuous fibrous network that tightens the capsule and ligaments as the arm moves, providing static (passive) restraints that help keep the humeral head centered in the glenoid. In other words, the tendons work together with the ligaments to stabilize the joint even when muscles aren’t actively contracting. The synovial membrane and articular cartilage don’t form this blending interaction in a way that enhances static stability.