Jose is a 55 year old man who tore all of the ligaments in h…
Jose is a 55 year old man who tore all of the ligaments in his right ankle playing basketball four weeks ago. He has edema in the right foot and ankle to just proximal to the malleoli. He is now weight bearing as tolerated. He is currently walking with one single-point cane and a modified four point gait pattern. He is learning how to go up and down the stairs one step at a time. When Jose ascends a step, which of the following muscle actions is taking place at the left knee joint during the left leg’s closed chain portion of ascending the stairs?