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Measurement of Head Impact Due to Standing Fall in Adults Using Anthropomorphic Test Dummies
Marzieh Hajiaghamemar1, Morteza Seidi, James R Ferguson
1Advanced Biomechanics Laboratory for Injury Reduction and Rehabilitation, Mechanical Engineering Department, University of Maine, Orono, ME, USA, marzieh.memar@maine.edu.
Annals of Biomedical Engineering
|January 23, 2015
Summary
Head impact from falls poses risks, especially for older adults. This study quantified head impact parameters during simulated falls using anthropomorphic test dummies, revealing scenario-dependent results.
Area of Science:
- Biomechanics
- Injury Prevention
- Human Factors Engineering
Background:
- Head injuries from falls are a significant public health concern, particularly for the elderly.
- Unprotected head impacts during falls can lead to severe injuries or fatalities.
Purpose of the Study:
- To determine the range of head impact parameters during simulated standing falls onto a hard surface.
- To analyze how different fall scenarios influence head impact dynamics.
Main Methods:
- Utilized Hybrid III anthropomorphic test dummies (5th percentile female, 50th percentile male).
- Simulated five fall scenarios: backward (with/without hip flexion), forward (with/without knee flexion), and lateral falls.
- Recorded dynamic responses including accelerations, forces, and velocities over 107 trials.
Main Results:
- Head impact parameters varied significantly depending on the fall scenario.
- Observed a wide range of impact metrics: peak translational acceleration (146-502 g), peak angular acceleration (8.8-43.3 krad/s²), peak force (3.9-24.5 kN), impact translational velocity (2.02-7.41 m/s), and peak angular velocity (12.9-70.3 rad/s).
Conclusions:
- Fall kinematics and kinetics are highly dependent on the specific fall scenario.
- The quantified impact parameters provide crucial data for understanding head injury risks and developing protective measures.
