Journal article
The Response of the Seated Human to Sinusoidal Vibration and Impact
Journal of biomechanical engineering, Vol.109(4), pp.279-284
11/01/1987
DOI: 10.1115/1.3138681
PMID: 2961931
Abstract
Low back pain has been shown to occur more frequently among vehicle drivers than in representative control groups. Thus the response of the human to vibration and impact is of interest. This study investigated the response of the spine to both impact and sinusoidal excitation in either a relaxed or erect seated posture. The sinusoidal testing apparatus used was a resonating system consisting of two parallel wooden beams, simply supported, and the impact testing apparatus a bearing-guided, spring-suspended platform, struck from below. Ten subjects (5 males, 5 females) were evaluated using both methods. Transfer functions were compared at 2–4 Hz, 4–8 Hz and 8–16 Hz intervals using a sign test. Although in 24 comparisons of either test method (vibration or impact) or posture (erect or relaxed) where eleven showed differences significant at the p < .05 level, only 2 out of 24 comparisons were the differences distinct enough to be significant (at the p < .01 level). Both of these latter differences were due to test method while the subjects were sitting erect. In those instances where there were no significant differences due to test method, the impact method may be a viable replacement for the vibration test method. Where the levels of significance are higher (p < .01 or p < .05), further study of the magnitude of the differences is indicated and may reveal further insight into the seated individual as a system.
Details
- Title: Subtitle
- The Response of the Seated Human to Sinusoidal Vibration and Impact
- Creators
- M. H Pope - Department of Orthopaedics and Rehabilitation, University of Vermont, Burlington, VT 05405D. G Wilder - Department of Orthopaedics and Rehabilitation, University of Vermont, Burlington, VT 05405L Jorneus - Chalmers University of Technology, Goteborg, SwedenH Broman - Chalmers University of Technology, Goteborg, SwedenM Svensson - Department of Orthopaedic Surgery 1, Sahlgren Hospital, Goteborg, Sweden; Also Chalmers University of Technology, Goteborg, SwedenG Andersson - Department of Orthopaedics Surgery 1, Sahlgren Hospital, Goteborg, Sweden; Also Department of Orthopaedics, Rush Presbyterian-St. Luke’s Medical Center, Chicago, Ill
- Resource Type
- Journal article
- Publication Details
- Journal of biomechanical engineering, Vol.109(4), pp.279-284
- Publisher
- ASME
- DOI
- 10.1115/1.3138681
- PMID
- 2961931
- ISSN
- 0148-0731
- eISSN
- 1528-8951
- Language
- English
- Date published
- 11/01/1987
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Occupational and Environmental Health
- Record Identifier
- 9984064104702771
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