The rectus femoris is a fusiform and biarticular long muscle located in the anterior aspect of the quadriceps muscle, these types of muscles are designed to execute movements that require significant length change or high shortening velocity. This biarticulate muscle is innervated by the femoral nerve and has two heads of origin: the direct or straight head, which arises from the anterior inferior iliac spine, and the indirect or reflected head, which arises from the superior acetabular ridge. T