Description: The pectineus m. is a small m. of the floor of the femoral triangle in the mid-thigh, lying in the same plane, but superior to the adductor longus. It originates on the pectinate line and ant. tubercle of the superior pubic ramus, and is inserted on the pectineal line of the femur, near that of the iliopsoas m.  The circulation is via a perforating branch of  the  deep femoral a. , and the innervation is from L2-L4 via the femoral and obturator nerves.