Whole-body vibration in neonatal transport: a review of current knowledge and future research challenges

2020 ◽  
Vol 146 ◽  
pp. 105051 ◽  
Author(s):  
I. Goswami ◽  
S. Redpath ◽  
R.G. Langlois ◽  
J.R. Green ◽  
K.S. Lee ◽  
...  
Keyword(s):  
Current Knowledge ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Future Research ◽  
Body Vibration ◽  
Neonatal Transport ◽  
Research Challenges

Mechanisms of Whole-Body Vibration Effects on Human Performance

1983 ◽  
Vol 27 (6) ◽  
pp. 472-472
Author(s):  
John C. Guignard ◽  
Alvah C. Bittner ◽  
Mary M. Harbeson
Keyword(s):  
Human Performance ◽  
Physiological State ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Future Research ◽  
Limiting Factor ◽  
Body Vibration ◽  
Long Duration ◽  
Performance Effects ◽  
Open Question

Oscillatory ship motion and vibration effects on crews in modern naval air and sea systems can be the limiting factor in mission performance. The mechanisms of these effects, however, have not yet been clearly delineated; nor have a practical taxonomy and standard methodology for distinguishing and evaluating the deleterious action of whole-body vibratory motion on human performance been established. Some effects of vibration on performance appear to be directly attributable to immediate mechanical disruption of input and /or output (i.e., interference at the points of contact—displays or controls—between operator and task). Far more meager is clear evidence for time-dependent disruptive or degrading effects of vibration on central cognitive processes: these of course may also be affected indirectly by changes in the physiological state (including motion sickness and fatigue) induced by the motion or vibration. The distinction between direct and indirect mechanisms of performance decrement in the motion environment has important implications for both protective measures and the focus of future research. This report considers published work on the performance effects of vibration in relation to the etiology of performance change and those implications. A critical review of the methodology of performance studies in motion and vibration environments is under way at the Naval Biodynamics Laboratory; and a series of experiments (some previously published) on whole-body vibration effects on performance is also in progress. While the duality of the mechanisms of action of oscillatory motion on performance remains an open question, the evidence so far adduced for other than direct mechanical effects is sparse, at least in the frequency range of major body resonance phenomena. Further experimentation, including long-duration studies, is needed to resolve this question. Implications both for future research directions and for current national and international standardization efforts in this area are discussed.

scholarly journals Effect of Wheelchair Frame Material on Users’ Mechanical Work and Transmitted Vibration

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Félix Chénier ◽  
Rachid Aissaoui
Keyword(s):  
Current Knowledge ◽  
Whole Body Vibration ◽  
Mechanical Work ◽  
Whole Body ◽  
Shoulder Injury ◽  
Body Vibration ◽  
Significant Difference ◽  
Current Belief ◽  
Vibration Transmissibility ◽  
Iso 2631

Wheelchair propulsion exposes the user to a high risk of shoulder injury and to whole-body vibration that exceeds recommendations of ISO 2631-1:1997. Reducing the mechanical work required to travel a given distance (WN-WPM, weight-normalized work-per-meter) can help reduce the risk of shoulder injury, while reducing the vibration transmissibility (VT) of the wheelchair frame can reduce whole-body vibration. New materials such as titanium and carbon are used in today’s wheelchairs and are advertised to improve both parameters, but current knowledge on this matter is limited. In this study, WN-WPM and VT were measured simultaneously and compared between six folding wheelchairs (1 titanium, 1 carbon, and 4 aluminium). Ten able-bodied users propelled the six wheelchairs on three ground surfaces. Although no significant difference of WN-WPM was found between wheelchairsP<0.1, significant differences of VT were foundP<0.05. The carbon wheelchair had the lowest VT. Contrarily to current belief, the titanium wheelchair VT was similar to aluminium wheelchairs. A negative correlation between VT and WN-WPM was found, which means that reducing VT may be at the expense of increasing WN-WPM. Based on our results, use of carbon in wheelchair construction seems promising to reduce VT without increasing WN-WPM.

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