Thigh. Anatomy Of TheThigh. The thighs are composed of numerous muscles including the quadriceps (rectus femoris, rectus medialis, rectus lateralis, and rectus intermedialis). These muscles extend the knee and (rectus femoris only) help to flex the hip.
Straight Leg Deadlifts
It is subdivided into separate portions, which have distinctive names.
The quadriceps main function is to extend the leg at the knee. This occurs during activities such as running, jumping, kicking and walking.
Sartorius is a strap muscle which runs obliquely across the front of the thigh. It is the longest muscle in the body. It runs from the anterior superior iliac spine to the medial surface of the shaft of the tibia
Sartorius flexes both the hip and knee joints and laterally rotates the thigh:when these movements are carried out simultaneously in both limbs, a cross-legged position will result (sartor = a tailor).
Gracilis is the most superficial muscle on the medial side of the thigh. It is thin and flattened, broad above, narrow and tapering below. It arises by a thin aponeurosis from the anterior margins of the lower half of the symphysis pubis and the upper half of the pubic arch.
The fibers run vertically downward, and end in a rounded tendon, which passes behind the medial condyle of the femur, curves around the medial condyle of the tibia, where it becomes flattened, and is inserted into the upper part of the medial surface of the body of the tibia, below the condyle.
Adductor Muscles: adductor brevis, adductor longus, adductor magnus, pectineus, and gracilis