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Anatomy Of The Pectineus Muscle - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes anatomy of the pectineus muscle. Follow me on twitter: https://twitter.com/#!/DrEbraheim_UTMC The pectineus muscle is a flat, quadrangular muscle, situated at the anterior part of the upper and medial aspect of the thigh. It is one of the six adductors of the thigh. The pectineus muscle is the most anterior adductor of the hip. It originates from the superior pubic ramus. The pectineus muscle is inserted into the pectineal line and linea aspera of the femur. The pectineus muscle is predominantly supplied by the femoral nerve, but it may have some obturator nerve innervation also. The pectineus muscle is the only adductor muscle that is supplied by the femoral nerve. One third of the population will have an accessory obturator nerve arising from L3-L4. The accessory obturator nerve passes over the superior pubic rami and then dives below the pectineus muscle and joins the anterior division of the obturator nerve. The accessory obturator nerve supplies the pectineus muscle which is usually innervated by the femoral nerve. The pectineus adducts the hip and supports external rotation and flexion of the hip joint. The adductors of the hip are part of the inner thigh muscles. They arrange from the pelvic bone to the femur and the nearby region. They lie between the extensor and flexor groups of the thigh muscles. Hip adduction occurs particularly during crossing of the legs and these adductor muscles are important in balance during standing and walking.