Influence of selected examination postures on shape of the spine and postural stability in humans.

Aims: The accuracy of non-radiographic measurement of the spinal shape is influenced by postural sway (PS). The aim of this study was to determine whether certain examination postures prevent PS without changing key spinal characteristics.

Methods: We tested 1) natural standing position (posture A), 2) fixation postures standing with the support of the upper limbs against a wall (posture B) and 3) standing with the support of the head and chest against a wall (posture C).