Lacunar ligament (also known as Gimbernat’s ligament) is a ligament of the inguinal region. Sometimes it is regarded as the medial part of the inguinal ligament, nevertheless, it connects the same to the pectineal ligament near the point where they both insert on the pubic tubercle.
Basically, the lacunar ligament is a part of the aponeurosis of external oblique muscle that is reflected backward and laterally. It is attached to pectineal line of pubis.
It is about 1.25 cm. long, larger in the male than in the female, almost horizontal in direction in the erect posture, and of a triangular form with the base directed laterally.
Its base is concave, thin, and sharp, and forms the medial boundary of the femoral ring. Its apex corresponds to the pubic tubercle.
Its posterior margin is attached to the pectineal line, and is continuous with the pectineal ligament. Its anterior margin is attached to the inguinal ligament.
Clinical Significance of lacunar ligament:
Lacunar ligament is the only boundary of the femoral canal that can be cut to release a femoral hearnia.