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The iliofemoral ligament is a thick and very tough triangular capsular ligament of the hip joint situated anterior to this joint. It attaches superiorly at the inferior portion of the anterior inferior iliac spine and adjacent portion of the margin of the acetabulum ; it attaches inferiorly at the intertrochanteric line .
The ligament becomes taut when the thigh is both flexed and either adducted or laterally/externally rotated. The ligament is usually too weak to actually function as a ligament [4] past childhood; [5] excessive movement at the hip joint is instead primarily limited by the three capsular ligament of the hip joint. [4]
The ischiofemoral ligament limits the internal rotation and adduction of the hip when it is in a flexed position. [3] Some deeper fibres of the ligament are continuous with the fibres of the zona orbicularis of the capsule. [4] This ligament is less well-defined than the other two capsular ligaments of the hip joint. [4]
The zona orbicularis and proximal hip joint capsule are poorly understood. Recent studies seem to confirm that the proximal to middle part of the articular capsule, including the zona orbicularis, acts biomechanically as a locking ring wrapped around the femoral neck and thus is a key structure for hip stability in distraction.
This causes the femur to rotate and point the knee laterally. The lateral rotators also oppose medial rotation by the gluteus medius and gluteus minimus. When the hip is flexed to 90 degrees, piriformis abducts the femur at the hip and reverses primary function, internally rotating the hip when the hip is flexed at 90 degrees or more. [7]
It crosses the hip joint to insert on the lesser trochanter of the femur. [1] The iliopsoas is classified as an "anterior hip muscle" or "inner hip muscle". [2] The psoas minor does contribute to the iliopsoas muscle. The inferior portion below the inguinal ligament forms part of the floor of the femoral triangle.
The pubofemoral ligament (or pubocapsular ligament [citation needed]) is a ligament which reinforces the inferior and anterior portions of the joint capsule of the hip joint. The ligament attaches superiorly at the superior ramus of pubis, and the iliopubic eminence ; it attaches inferiorly at the inferior portion of the intertrochanteric line ...
There are two bones that make up the hip joint and create an articulation between the femur and pelvis. This articulation connects the axial skeleton with the lower extremity. The pelvic bone, also known as the innominate bone, is formed by three bones fused together: the ilium, ischium, and pubis. The musculature of the hip is divided into ...
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