Pectineal line (pubis)

Pectineal Line (Pubis)

The pectineal line is a prominent anatomical feature located on the pubis bone, which is one of the three bones that make up the hip bone or innominate bone. It serves as an attachment site for various muscles and ligaments in the pelvic region. In this article, we will explore the anatomy and significance of the pectineal line.

Anatomy

The pectineal line is a ridge-like structure that runs along the superior aspect of the pubis bone. It extends from the pubic tubercle, which is a small bony prominence located at the anterior end of the pubis, to the iliopubic eminence, which is a rounded elevation on the superior aspect of the pubis. The pectineal line separates the superior pubic ramus from the inferior pubic ramus.

Function

The pectineal line serves as an attachment site for several important muscles and ligaments involved in the stability and movement of the hip joint. Some of the key structures that attach to the pectineal line include:

1. Pectineus Muscle: The pectineus muscle originates from the pectineal line and inserts onto the femur bone. It plays a role in flexing and adducting the hip joint.

2. Inguinal Ligament: The inguinal ligament, also known as Poupart's ligament, is a band of fibrous tissue that extends from the anterior superior iliac spine to the pubic tubercle. It runs parallel to the pectineal line and helps to support the abdominal muscles.

3. Lacunar Ligament: The lacunar ligament is a triangular-shaped band of fibrous tissue that extends from the pectineal line to the inguinal ligament. It forms the floor of the femoral canal and helps to prevent herniation of abdominal contents into the groin region.

4. Cooper's Ligament: Cooper's ligament, also known as the pectineal ligament, is a thickening of the fascia that attaches to the pectineal line. It provides support to the breast tissue in females.

Clinical Significance

The pectineal line is of clinical importance in various surgical procedures and diagnostic imaging studies. For example:

1. Inguinal Hernia: The pectineal line serves as a landmark for surgeons during inguinal hernia repair. It helps to identify the boundaries of the inguinal canal and guide the placement of surgical mesh.

2. Radiographic Evaluation: The pectineal line can be visualized on X-ray and other imaging modalities. Its appearance can provide valuable information about the alignment and integrity of the pubic bone.