to assist in a stabilizing role. Psoas major has intimate anatomical
attachments to the diaphragm and the pelvic
floor. This unique anatomical location allows the psoas
major to act as a link between these structures and may
help in maintaining the stability of the lumbar cylinder
mechanism. This can be thought of conceptually as a supporting
rod in the middle of the cylinder. Early biomechanical
literature suggested that the psoas major might
aid in the stabilization of the lumbar spine through its large
potential to generate compressive forces, which would result
in increased spinal stiffness.3