An analysis of the external and internal curvatures of spine was carried out on a sample of nine males from biostereometric measurements for different imposed postures. The results concerning the modifications of the external shape of the curves are used for the 3-D human body modeling in C.A.D. applications.
J- C . Pineau,
"Biostereometric Analysis Of Spine Curvatures On Living Human Body", Proc. SPIE 0602, Biostereometrics '85, (7 July 1986); doi: 10.1117/12.956321; https://doi.org/10.1117/12.956321