Painkillers, specifically narcotics, can cause constipation. A lot of receptors for the narcotic class of drugs are in the digestive tract, so it tends to bring everything to a halt, says Thomas Park, MD, a gastroenterologist with the University of Rochester Medical Center Park in New York.
Full Muscles of the Leg and Foot Description. [Continued from above] . . . The anterior muscles, such as the quadriceps femoris, iliopsoas, and sartorius, work as a group to flex the thigh at the hip and extend the leg at the knee.Posterior muscles, such as the hamstrings and gluteus maximus, produce the opposite motion â extension of the thigh at the hip and flexion of the leg at the knee.Continued from above] . . . The anterior muscles, such as the quadriceps femoris, iliopsoas, and sartorius, work as a group to flex the thigh at the hip and extend the leg at the knee.
At the back of the leg behind the thigh there are three muscles known as the hamstrings.These muscles have a lot to do with how flexible we are.The three muscles, semitendinosus, semimembranosus, and biceps femoris (which has two heads) flex the knee and extend the hip (except for one head of the biceps femoris). The hamstrings also cross and act upon the joints of both the hip and the knee.We are looking at three muscles with four attachments.hese muscles have a lot to do with how flexible we are. The three muscles, semitendinosus, semimembranosus, and biceps femoris (which has two heads) flex the knee and extend the hip (except for one head of the biceps femoris).