Force closure describes stability provided by what?

Force closure describes stability provided by what?

• A. Stability of the pelvis provided by bones and ligaments.
• B. Stability by synovial fluid.
• C. Stability by fat tissue.
• D. Stability of the pelvis provided by muscle strength and function, particularly core and hip muscles.

Answer: (D)

Force closure is about stability created by active muscle contraction and the tension those muscles generate across joints, making the pelvis and spine more resistant to shear forces. This dynamic stabilization comes from coordinated work of the core muscles (deep abdominal muscles like transversus abdominis, obliques, pelvic floor, diaphragm) and hip stabilizers (gluteus medius/minimus and related hip muscles). It contrasts with passive stability from the bony architecture and ligaments, which is form closure and does not rely on active muscle contraction. Synovial fluid and fat tissue don’t provide ongoing mechanical compression or control of movement in the same way. So, force closure best describes stability provided by muscle strength and function, particularly core and hip muscles.

Force closure is about stability created by active muscle contraction and the tension those muscles generate across joints, making the pelvis and spine more resistant to shear forces. This dynamic stabilization comes from coordinated work of the core muscles (deep abdominal muscles like transversus abdominis, obliques, pelvic floor, diaphragm) and hip stabilizers (gluteus medius/minimus and related hip muscles). It contrasts with passive stability from the bony architecture and ligaments, which is form closure and does not rely on active muscle contraction. Synovial fluid and fat tissue don’t provide ongoing mechanical compression or control of movement in the same way. So, force closure best describes stability provided by muscle strength and function, particularly core and hip muscles.