STUDY DESIGN: This study measured repeated human head accelerations (g) during daily activities. OBJECTIVES: Perturbations of daily living were compared to similar data from low velocity rear-end motor vehicle accidents. SUMMARY OF BACKGROUND DATA: Past assumptions suggest that motor vehicle accident severity does not correlate with the degree of sustained injury. Early engineering studies indicated that occupant disturbance in a low velocity motor vehicle accident is minor. METHODS: Eight volunteers were perturbed with 13 daily activities. Helmets on the heads of volunteers were instrumented with tri-planar accelerometers with output sampling of 500 Hz, sensitivity of 0.02 g, and a range of +/- 20 g. RESULTS: There was wide inter-subject response for various perturbations. Plopping backward into a chair caused maximum peak acceleration horizontally at 5.6 g and vertically at 8.5 g, with force vector of 10.1 g at 54.9 degrees. Mean impulse duration was 0.19 sec. There was no hint of injury in any subject. CONCLUSIONS: Perturbations of daily living compared similarly to the jostling expected in low velocity "whiplash"-type motor vehicle accidents.
STUDY DESIGN: This study measured repeated human head accelerations (g) during daily activities. OBJECTIVES: Perturbations of daily living were compared to similar data from low velocity rear-end motor vehicle accidents. SUMMARY OF BACKGROUND DATA: Past assumptions suggest that motor vehicle accident severity does not correlate with the degree of sustained injury. Early engineering studies indicated that occupant disturbance in a low velocity motor vehicle accident is minor. METHODS: Eight volunteers were perturbed with 13 daily activities. Helmets on the heads of volunteers were instrumented with tri-planar accelerometers with output sampling of 500 Hz, sensitivity of 0.02 g, and a range of +/- 20 g. RESULTS: There was wide inter-subject response for various perturbations. Plopping backward into a chair caused maximum peak acceleration horizontally at 5.6 g and vertically at 8.5 g, with force vector of 10.1 g at 54.9 degrees. Mean impulse duration was 0.19 sec. There was no hint of injury in any subject. CONCLUSIONS: Perturbations of daily living compared similarly to the jostling expected in low velocity "whiplash"-type motor vehicle accidents.
Authors: Andrew K Knutsen; Arnold D Gomez; Mihika Gangolli; Wen-Tung Wang; Deva Chan; Yuan-Chiao Lu; Eftychios Christoforou; Jerry L Prince; Philip V Bayly; John A Butman; Dzung L Pham Journal: Brain Multiphys Date: 2020-09-03
Authors: N Vibert; H G MacDougall; C de Waele; D P Gilchrist; A M Burgess; A Sidis; A Migliaccio; I S Curthoys; P P Vidal Journal: J Physiol Date: 2001-05-01 Impact factor: 5.182
Authors: Logan E Miller; Jillian E Urban; Vincent M Whelan; Walt W Baxter; Stephen B Tatter; Joel D Stitzel Journal: Biomech Model Mechanobiol Date: 2019-11-30