Accession Number:

ADA370895

Title:

A Personal Computer-Based Head-Spine Model.

Descriptive Note:

Final rept. May 96-Sep 98

Corporate Author:

BIODYNAMICS RESEARCH CORP SAN ANTONIO TX

Personal Author(s):

• Pancratz, David J.
• Rogers, Linda J.
• Bomar, John B., Jr.

Report Date:

1998-09-01

Pagination or Media Count:

151.0

Abstract:

The Head-Spine Model HSM originally developed for the Unix environment was recoded for the personal computer. This recode included code improvements and bug fixes, as well as the development of a graphical interface for creating simulations. The HSM can be used to predict the forces and motions of a human spinal column. The vertebrae are modeled with rigid bodies while hydrodynamic elements model the intevertebral discs. A full set of ligamenteous and active muscular models is also incorporated. External accelerations can be applied to the system and the resulting response calculated. A novel method of calculating an initial equilibrium position was incorporated. Several simulations of frontal and vertical accelerations were conducted to demonstrate the utility of the software. Along with the HSM, a database of spinal element properties was created. This database can be separately used from the software to determine mass, material, and geometric properties of the spinal elements as derived from a variety of sources in the literature.

Descriptors:

• *COMPUTER PROGRAMS
• *MAN COMPUTER INTERFACE
• *HEAD(ANATOMY)
• *SPINAL COLUMN
• DATA BASES
• POSITION(LOCATION)
• COMPUTATIONS
• MODELS
• HUMANS
• INTERFACES
• ACCELERATION
• EQUILIBRIUM(GENERAL)
• VERTICAL ORIENTATION
• GRAPHICS
• GEOMETRY
• EXTERNAL
• DISKS
• MICROCOMPUTERS
• MUSCLES
• RIGIDITY
• HYDRODYNAMICS
• BIODYNAMICS

Subject Categories:

• Anatomy and Physiology
• Computer Programming and Software
• Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE