You originally are passively stretching the hip flexors of a…

You originally are passively stretching the hip flexors of a patient in the position of prone hip extension and knee flexion. You later note with the knee (staight second) position that the patient demonstrates greater hip extension passive range of motion (PROM).  The reason for the improved hip extension PROM with the knee straight may best be explained by which of the following?

A man is sitting on a chair. He brings himself up into a sta…

A man is sitting on a chair. He brings himself up into a standing position. His tibiofemoral joint moves from flexed position to full extension during the maneuver. Which of the following best describes the arthrokinematic motion at the tibiofemoral joint during this maneuver?