Skip to main content

Biomechanical analysis and simulation of backward falls with head impact in older adults

Resource type
Thesis type
(Thesis) M.A.Sc.
Date created
2020-08-05
Authors/Contributors
Author: Elabd, Karam
Abstract
This thesis examined the dynamics of backward falls in older adults involving head impact. Time-varying kinematics were extracted from digitizing videos of 11 real-life falls by residents of long-term care. The pelvis always impacted the ground before the head. On average, the head descended 1.2 m, and had a vertical velocity of 1.7 m/s just before it struck the ground. A novel dummy was used to examine how fall mechanics and compliant flooring affect head acceleration. Landing with a curved versus flat torso decreased peak rotational acceleration by 27% (4633 versus 5901 rad/s2). Landing with fixed versus freely rotating hips lowered peak translational accelerations by 36% (101.5 versus 158.7 g) and peak rotational accelerations by 38% (4168 versus 6366 rad/s2). The protective benefit of compliant flooring depended on torso curvature and hip stiffness. These results show that unexplored aspects of fall mechanics strongly influence head impact severity.
Document
Identifier
etd21081
Copyright statement
Copyright is held by the author.
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Scholarly level
Supervisor or Senior Supervisor
Thesis advisor: Robinovitch, Stephen
Member of collection
Download file Size
etd21081.pdf 3.42 MB

Views & downloads - as of June 2023

Views: 95
Downloads: 11