Geometric and inertial data of the trunk in adult males.

In this study investigations on geometric and inertial quantities of 15 male patients' trunks are described. Layers of 8 mm were scanned using computerized tomography. Thorax, abdomen, pelvis, and two shoulders and their unchangeable and changeable (muscle, fat, and skin) tissues were investigated. The trunk was also divided into portions and subportions according to anthropological landmarks. By comparing subportions to right non-circular frusta, the volume of the trunk is obtained. Volume, mass, and density of trunk's segments and their tissues are given. The location of the centers of mass of the segments is also provided. Regression equations are presented for the calculation of volume of tissues and of subportions. Application of the data for locating the center of mass of the body, for building anthropometric dummies, and for calculating the load acting on any level of a spine are presented.