actions of the knee joint and primary muscles involved ADVERTISEMENT 1.07K viewsFebruary 9, 2013 0 Derek February 9, 2013 0 Comments list the actions possible at the knee joint and the primary muscles involved 7 Answers ActiveVotedNewestOldest 0 Daniel0 Posted 0 Comments Sorry to contradict Bryant, but I think the forum is fine. As answered, the knee flexes and extends, it’s not designed to rotate. Regarding Susan’s answer, the biceps femoris is also known as the rectus femoris. Good kinesiology you all! Take care. You are viewing 1 out of 7 answers, click here to view all answers. Register or Login