The pectineus is a muscle in the anterior compartment of the thigh. It is a flat, quadrangular-shaped muscle, which contributes to the floor of the femoral triangle.
- Attachments: Originates from the pectineal line of the pubis bone. It inserts onto the pectineal line on the posterior aspect of the femur, immediately inferior to the lesser trochanter.
- Actions: Adduction and flexion at the hip joint.
- Innervation: Femoral nerve (may also receive a branch from the obturator nerve).
- Blood supply: Medial circumflex femoral artery, femoral artery and obturator artery.