Quadriceps femoris muscle

Beginning: Attachment: tuberositas tibiae (ligamentum patellae)
 * 1) m. rectus femoris - spina iliaca anterior inferior; (caput rectum et caput reflectum)
 * 2) m. vastus medialis − labium mediale lineae asperae;
 * 3) m. vastus intermedius - front surface of the femur, distal to the linea intertrochanterica; part of the muscle fibers is clamped directly into the joint sheath, thus preventing it from twisting - m. articularis genu
 * 4) m. vastus lateralis − labium laterale lineae asperae and linea intertrochanterica - its proximal part

Innervation: n. femoralis (from L2−L4)

Function:
 * 1) hip joint − flexion;
 * 2) knee joint − extension.