What does the pubofemoral ligament primarily resist?

• A. Flexion and internal rotation
• B. Abduction and extension
• C. Adduction and flexion
• D. Extension and rotation

Answer: (B)

The pubofemoral ligament is an important structure within the hip joint that plays a key role in maintaining stability and limiting certain movements. This ligament primarily resists abduction and extension of the hip joint.

When the leg moves away from the midline of the body (abduction) or when there is excessive movement backward with respect to the thigh (extension), the pubofemoral ligament becomes taut, thereby helping to prevent these movements from occurring. This is crucial during activities where joint stability is paramount, such as during walking, running, or jumping, as it helps maintain proper alignment and function of the thigh in relation to the pelvis.

Therefore, the characterization of the pubofemoral ligament as a limiter of abduction and extension accurately reflects its anatomical and functional role in the hip joint biomechanics.