The function of a check ligament is to prevent what?

• A. Prevent muscle/tendon strain by overextension
• B. Attach muscle to bone
• C. Stabilize joints
• D. Serve as a nerve sheath

Answer: (A)

Check ligaments limit how far the flexor tendons can stretch as the limb moves, acting like safety restraints to keep the tendons from overextending and getting strained or torn during movement. They help maintain the tendon within a safe range of motion, protecting the muscle–tendon unit from injury. They don’t attach muscle to bone (that’s the job of tendons from muscle to bone), nor are they the main structures stabilizing joints, and they aren’t nerve sheaths. The important idea is that these ligaments prevent overextension of the tendon to guard against strain.