MODEL RELEASED: McTimoney chiropractic. The chiropractor assesses the position of the atlas bone which supports the skull. McTimoney chiropractic is a system of adjustment by hand of minor displacements (subluxations) of the spinal column and bones. These misalignments affect associated or neighbouring nerves causing discomfort; backache, for example. The technique analyses and treats the whole body, using mainly high velocity thrusts with a force of seven to fourteen pounds. It can also be applied to animals.