GROSS ANATOMY

Detailed explanation-1: -One area that requires extra attention during recovery is the quadriceps (quad), a group of muscles on the front of the thigh extending to the knee.

Detailed explanation-2: -The effects of TKA on muscle strength are substantial, as lower extremity weakness affects functional mobility in patients after surgery. Specifically, quadriceps and hamstrings muscle weakness leads to deficits in rising from a chair, walking speed and stair climbing.

Detailed explanation-3: -The one muscle that extends the knee is the massive quadriceps. We saw it briefly in the last section. We’ll take a better look at it now. The main flexors of the knee are the so-called hamstring muscles, semi-membranosus, semitendinosus, and biceps femoris.

Detailed explanation-4: -This muscle atrophy is increased by the nervous system reducing the input signal to your leg muscles after surgery. Disuse muscle atrophy is initially why you lose muscle mass in your operated leg after ACL surgery, which is completely normal.