The pubofemoral ligament, also known as the pubocapsular ligament, is a supporting ligament located on the interior side of the hip joint. It extends from the pubic portion of the acetabular rim and passes below the neck of the femur. The pubofemoral ligament is narrow in structure and is quite weak. It is composed of a single fiber band and has a narrow, triangular shaped. It is attached to the base of the iliopubic eminence, and to the obturator crest and superior ramus of the pubis above. It blends in with the joint capsule distally and the medial band of iliofemoral ligament. The pubofemoral ligament's functions include preventing hyperextension and over-abduction, and limiting external rotation. During external rotation and extension, the pubofemoral ligament tightens, but this action serves a less important limiting role in comparison to other ligaments in the joint. The pubofemoral ligament is considered to be a supporting element of the joint capsule, reinforcing the inferior and anterior capsule.
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In Depth: Pubofemoral ligament