Center for Human Modeling and Simulation

Document Type

Journal Article

Date of this Version

March 1991


Copyright 1991 IEEE. Reprinted from IEEE Computer Graphics and Applications, Volume 11, Issue 2, 1991, pages 29-38.

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Pennsylvania's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.


Efforts to develop a more accurate model of the human spine and torso in order to improve realism in human motion modeling are discussed. The model of spinal motion, which is represented within Jack (a software system for human figure modeling and manipulation), is described. The impact parameters, vertebral joint movement, and the spine database are considered. Application of the motion model is examined, and examples of its use are given.



Date Posted: 01 August 2007