Does essential anatomy update1/9/2023 ![]() ![]() Internal articular surface - adjacent to the joint (avascular).On the posterior aspect, the labrum is dimensionally square but with a rounded distal surface. On the anterior aspect, the labrum is triangular in the radial section. It has an irregular shape, being wider and thinner anteriorly and thicker posteriorly. It lines the acetabular socket and attaches to the bony rim of the acetabulum. The labrum forms a fibrocartilagenous extension of the bony acetabulum, mostly composed of type 1 collagen that is typically between 2-3mm thick. Īcetabular Labrum copyright and courtesy of Primal Pictures Ltd Injuries to the ligamentum teres can occur in dislocations, which can cause lesions of the foveal artery, resulting in osteonecrosis of the femoral head.Serves as a carrier for the foveal artery (posterior division of the obturator artery), which supplies the femoral head in the infant/pediatric population (vascular contribution to the femoral head blood supply is negligible in adults).Located intracapsular and attaches the apex of the cotyloid notch to the fovea of the femoral head.The ligamentum teres (ligament of the head of the femur) It attaches to the ischium to behind the acetabulum and it attaches to the base of the greater trochanter - it prevents excess extension ![]() Ischiofemoral ligaments - is the weakest of the three ligaments and consists of a triangular band of fibres that form the posterior hip joint capsule.Pubofemoral lies anteroinferiorly - it prevents excess abduction and extension.Iliofemoral ligament (also known as the Y ligament of Bigelow) is the strongest ligament in the body it lies on the anterior aspect of the hip joint - it prevents hyperextension,.Regulation of synovial fluid hydrodynamic properties.Negative pressure maintenance (i.e., the "vacuum seal") to enhance hip joint stability.Acetabular labrum (fiibrocartilaginous collar surrounding the acetabulum) which provides the following functions: Shape of the acetabulum - Due to the depth of the acetabulum, it can encompass almost the entire head of the femur.Ģ.Hip stability arises from several factors. In addition to movement, the hip joint facilitates weight-bearing. The sagittal axis, or forward to backward, allows for abduction and adduction.The longitudinal axis, or vertically along the thigh, allows for internal and external rotation.The transverse axis permits flexion and extension movement.The location of the center of the entire axis is at the femoral head.The hip joint allows for movement in three major axes, all of which are perpendicular to one another. The hip joint connects the lower extremities with the axial skeleton. Typically works in a closed kinematic chain.Primary function of the hip joint is to provide dynamic support the weight of the body/trunk while facilitating force and load transmission from the axial skeleton to the lower extremities, allowing mobility.Diarthrodial joint with its inherent stability dictated primarily by its osseous components/articulations.The hip joint is a ball and socket joint that is the point of articulation between the head of the femur and the acetabulum of the pelvis.
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