This duality is reflected in its attachments and nerve supply.

The muscle is divided into an (arising from the inferior pubic/ischial rami, inserting on the linea aspera) and a Hamstring part (arising from the ischial tuberosity, inserting on the adductor tubercle).

As the adductor magnus inserts onto the femur, there is a gap in the aponeurosis (the flat tendon sheet). This gap is called the .