Article: PDF OnlyForm and Function of the Musculoskeletal System As Revealed by Mathematical Analysis of the Lumbar Spine An EssayFarfan, H. F. MD, FRCS (C) Author Information Dr. Farfan is deceased. Spine: July 1995 - Volume 20 - Issue 13 - p 1462-1473 Buy Abstract Wolff's law describes the mechanical ultrastructure of tissue and indicates a design for minimal stress or minimal energy expenditure. Formation of this theory for the mechanism of the back reveals the critical design of members of this musculoskeletal system, which is comparable with other anthropoids. It also reveals that the pre-adaptations that enable the individual to lift heavy weights are the same adaptations that allow him or her to walk and run. © Lippincott-Raven Publishers.