Fryette's Laws of Spinal Motion
FIRST LAW[edit | edit source]
When the spine is in neutral, side bending to one side will be accompanied by horizontal rotation to the opposite side.
SECOND LAW[edit | edit source]
When the spine is flexed or extended (non-neutral), sidebending to one side will be accompanied by rotation to the same side.
THIRD LAW[edit | edit source]
When motion is introduced in one plane it will modify (reduce) motion in the other two planes.