Lateral mass screws can provide fixation for fusions between the C1 and C2 vertebrae.The vastus lateralis courses in association with the lateral patellofemoral liga-ment, which has been described earlier. Its angle of insertion is approximately 30 to 40 degrees laterally off the axis of the femur. anterolateral aspect of the femur and lateral intermuscular septum beginning proximally at the level of the greater trochanter.What is Lateral Torsional Buckling (L.T.B.)? Lateral Torsional Buckling (LTB) is a failure criteria for beams in flexure.The AISC defines Lateral Torsional Buckling as: the buckling mode of a flexural member involving deflection normal to the plane of bending occurring simultaneously with twist about the shear center of the cross-section.