Inguinal ligament (sometimes known as Poupart’s ligament, which is an eponym) extends from the anterior superior iliac spine to the pubic tubercle. It is in fact the thick, folded lower border of the aponeurosis of external oblique muscle.
The grooved abdominal surface of inguinal ligament forms the floor of the inguinal canal. The ligament in its anatomic position is not linear. It has inferior and anterior convexity. Its lower border is continuous with the fascia lata of thigh.
The lateral half of inguinal ligament is rounded and lies in a more oblique position. The medial half gradually widens towards its attachment to the pubis and becomes more horizontal. This half of the ligament supports the spermatic cord.
At the medial end, some fibers do not attach to the pubic tubercle but extend posteriorly and laterally to attach to the pectineal line, forming the lacunar ligament.
Function of Inguinal Ligament:
The ligament serves to contain soft tissues as they course anteriorly from the trunk to the lower extremity. This structure demarcates the superior border of the femoral triangle.