Adductor muscles of the hip

Structure

The adductor group is made up of:

• Adductor brevis
• Adductor longus
• Adductor magnus
• Adductor minimus This is widely considered to be a part of adductor magnus.
• pectineus
• gracilis
• Obturator externus is also part of the medial compartment of thigh

The adductors originate on the pubis and ischium bones and insert mainly on the medial posterior surface of the femur.

Nerve supply

The pectineus is the only adductor muscle that is innervated by the femoral nerve. The other adductor muscles are innervated by the obturator nerve with the exception of a small part of the adductor magnus which is innervated by the tibial nerve.

Variation

In 33% of people a supernumerary muscle is found between the adductor brevis and adductor minimus. When present, this muscle originates from the upper part of the inferior ramus of the pubis from where it runs downwards and laterally. In half of cases, it inserts into the anterior surface of the insertion aponeurosis of the adductor minimus. In the remaining cases, it is either inserted into the upper part of the pectineal line or the posterior part of the lesser trochanter. While similar to its neighbouring adductors, it is formed by separation from the superficial layer of the obturator externus, and is thus not ontogenetically related to the adductors.