Pectineus: The pectineus is a flat muscle that forms the base of the femoral triangle. It has dual innervation, and thus considered a transitional muscle between anterior and medial thigh compartments.
Attachments of the Pectineus
Origin-It originates from the pectineal line on the anterior surface of the pelvis
Insertion-attaches to the pectineal line on the posterior side of the femur, just inferior to the lesser trochanter.
Function of the Pectineus
Adduction and flexion at the hip joint.