There is a lot of explanations online and in textbooks on the three (3) Law’s of Fryette’s Spinal Motion. I will not go into the nitty gritty of it. So here’s my simple understanding on Fryette’s Law of Spinal Motion…
FIRST LAW: When the spine is in neutral, side bending to one side will be accompanied by horizontal rotation to the opposite side.
TRANSLATION: When you’re standing in a neutral position (no bending or hyperextension) and you laterally bend/ flex or side bend to the RIGHT. Your spine will ROTATE to the LEFT (the opposite side).
SECOND LAW: When the spine is flexed or extended (non-neutral), sidebending to one side will be accompanied by rotation to the same side.
TRANSLATION: When you flex or hyperextend your spine and you laterally bend/ flex or side bend to the RIGHT. Your spine will ROTATE to the RIGHT (same side).
THIRD LAW: When motion is introduced in one plane it will modify (reduce) motion in the other two planes.
TRANSLATION: When you side bend or forward flex or you do any movement in one plane. Simply put, there won’t be as much motion in the other planes.
Knowing this is important in knowing how normal spinal movements work as compared to those affected with somatic problems, such as Scoliosis.