The pectineus muscle
is a flat, quadrangular muscle
, situated at the anterior part of the upper and medial aspect of the thigh
It can be classified in the medial compartment of thigh (when the function is emphasized) or the anterior compartment of thigh (when the nerve is emphasized).
It is one of the muscles primarily responsible for hip flexion. It also adducts and medially rotates the thigh.
Innervation is by the femoral nerve
(L2 and L3) and occasionally a branch of the obturator nerve
Origin and insertion
It arises from the pectineal line
of the pubis
and to a slight extent from the surface of bone in front of it, between the iliopectineal eminence
and tubercle of the pubis, and from the fascia covering the anterior surface of the muscle; the fibers pass downward, backward, and lateralward, to be inserted into a the pectineal line of the femur
which leads from the lesser trochanter
to the linea aspera
- - "Muscles of the anterior (extensor) compartment of the thigh."
- - "Deep muscles of the anterior thigh."