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Trunk muscle recrui...
Trunk muscle recruitment patterns in simulated precrash events
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- Olafsdottir, Jóna Marin, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fice, Jason B. (författare)
- University of British Columbia (UBC)
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- Mang, Daniel W.H. (författare)
- University of British Columbia (UBC)
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visa fler...
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- Brolin, Karin, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Davidsson, Johan, 1967 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Blouin, Jean-Sébastien (författare)
- University of British Columbia (UBC)
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Siegmund, Gunter P. (författare)
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(creator_code:org_t)
- 2018-03-27
- 2018
- Engelska.
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Ingår i: Traffic Injury Prevention. - : Informa UK Limited. - 1538-957X .- 1538-9588. ; 19, s. S186-S188
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://www.tandfonl...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Objectives: To quantify trunk muscle activation levels during whole body accelerations that simulate precrash events in multiple directions and to identify recruitment patterns for the development of active human body models. Methods: Four subjects (1 female, 3 males) were accelerated at 0.55 g (net Δv = 4.0 m/s) in 8 directions while seated on a sled-mounted car seat to simulate a precrash pulse. Electromyographic (EMG) activity in 4 trunk muscles was measured using wire electrodes inserted into the left rectus abdominis, internal oblique, iliocostalis, and multifidus muscles at the L2–L3 level. Muscle activity evoked by the perturbations was normalized by each muscle's isometric maximum voluntary contraction (MVC) activity. Spatial tuning curves were plotted at 150, 300, and 600 ms after acceleration onset. Results: EMG activity remained below 40% MVC for the three time points for most directions. At the 150- and 300 ms time points, the highest EMG amplitudes were observed during perturbations to the left (–90°) and left rearward (–135°). EMG activity diminished by 600 ms for the anterior muscles, but not for the posterior muscles. Conclusions: These preliminary results suggest that trunk muscle activity may be directionally tuned at the acceleration level tested here. Although data from more subjects are needed, these preliminary data support the development of modeled trunk muscle recruitment strategies in active human body models that predict occupant responses in precrash scenarios.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Annan medicinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Other Medical Engineering (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
Nyckelord
- Impact biomechanics
- trunk muscle
- EMG
- multidirectional perturbations
- spatial tuning patterns
- precrash
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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