Fryette's Laws of Spinal Motion
Original Editor - Venus Pagare
Top Contributors - Venus Pagare, WikiSysop and Kim Jackson
Introduction[edit | edit source]
Fryette's Laws is a set of three laws pertaining to skeletal anatomy named after Harrison Fryette, D.O. The laws are defined as a set of guiding principles used by practitioners of osteopathic medicine to discriminate between dysfunctions in the axial skeleton. The first two laws solely apply to the lumbar and thoracic spinal regions, but the third applies to the entire vertebral column.
History[edit | edit source]
The first two laws were developed by Dr. Fryette in 1918, and the third was developed by C.R. Nelson, D.O in 1948.
The 3 Laws[edit | edit source]
1. 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.
2. 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.
3. Third Law[edit | edit source]
When motion is introduced in one plane it will modify (reduce) motion in the other two planes.
