What are femoral biceps?

femoral biceps, also known as biceps femoris, is the muscle of hamstrings on the back of the thigh. Like biceps brachii muscles on the arm, it is a double -headed muscle known as biceps, although it is singular in form. Its function is also analogous to the arm muscle function, because, like Biceps Brachii, the elbow joint, the biceps femoris is shortened with the knee joint. In addition to the function like a flexor knee, femoral biceps also contributes to the extension of the hip and lateral thigh rotation. The long head of femoral biceps comes through the tendon on the back aspect of the ischia tuberosity, thickened bone on both sides of the pelvis bottom, which is referred to as "sitting". Below is a short head of femoral biceps, which comes about in the middle of the back of the back of the femur bone in the thigh along the vertical ridge known as Linea Aspera. Together two heads of this muscle, which are fusiform or in the shape of a spindle, run down to the center of the back of the thigh.

Shortly before reaching the knee joint, the femoral biceps curves slightly laterally, where both heads converge and form aponeurosis or white fiber vagina similar to tendons that close the abdomen of the muscle. These fibers narrow into a single tendon that passes behind the knee joint along its side or outside. He then inserts just below the knee on the bones of the fibula shine, specifically on the side aspect of the bone head. Some tendon fibers also associate with fibular collateral clay joint ligament and also with the fascia of the lower leg, the cloak there are muscles.

As this muscle crosses the bot hips and a knee joint, action on both joints. However, this is the strongest when only one joint is active. For example, it operates with the muscles of the Semitendinosus and the semimembosus hamstrings to bend the knee joint, but its role is reduced when it is also invited to extend or draw backwards, hip. Similarly the less isActive when extending the hip and external rotation in parallel bending the knee joint.