From the Research
Function of the Iliofemoral Ligament
The iliofemoral (IF) ligament, also known as the lateral ligament of the hip, plays a crucial role in hip joint stability. The key functions of the iliofemoral ligament include:
- Limiting external rotation in flexion and both internal and external rotation in extension 1
- Providing anterior hip stability, with the iliofemoral ligament being the primary stabilizer of the hip joint 1, 2
- Transmitting muscular power to the joint via the capsular complex, acting as a dynamic stabilizer 2
- Working in conjunction with other ligaments, such as the pubofemoral and ischiofemoral ligaments, to maintain hip joint stability 3, 4
Anatomy and Structure
The iliofemoral ligament is the largest hip ligament, consisting of two distinct arms, and is highly variable in its location and overall size 1. The ligament is formed on the anterosuperior region of the hip joint capsule and is connected to the tendon and deep aponeurosis of the gluteus minimus and iliopsoas 2. The iliofemoral ligament is also related to the zona orbicularis, with the distal part of the ischiofemoral ligament being a continuation of the zona orbicularis 4.
Clinical Significance
Injuries to the iliofemoral ligament can occur due to traumatic hip instability or iatrogenic causes, and can be accurately studied with magnetic resonance imaging 1. The abduction-hyperextension-external rotation (AB-HEER) test is the most accurate test to detect iliofemoral ligament lesions 1. Understanding the anatomy and function of the iliofemoral ligament is essential for developing effective treatment strategies for hip injuries and instability 5.