The sartorius muscle is a long and superficial muscle of the human thigh. Strap-like, it lies on its anterior aspect, stretching over the rectus femoris, adductor longus, and vastus medialis muscle. It travels down from the hip to the leg.
The sartorius arises from the anterior superior iliac spine, on the lateral aspect of hip. Then it descends obliquely and medially. Curving around the back of the medial epicondyle, it ends as a flat tendon, which is inserted into the tubercle of the tibia.
Action
The sartorius muscle flexes the thigh and leg, rotating the thigh laterally, and the leg medially.
Innervation
It is innervated by branches of the femoral nerve, from L2 and L3 of lumbar plexus.
Blood Supply
The superior portion of this long muscle is supplied by lateral circumflex femoral artery. The middle part is irrigated by muscular branches from femoral artery, while the distal portion receives oxygen-rich blood from the superior genicular artery.
Below, a picture/drawing of the human right thigh, showing the sartorius muscle, among others.
