umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effects of vibration on muscles in the neck and upper limbs: with focus on occupational terrain vehicle drivers
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation.
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Introduction: Occupational drivers of terrain vehicles are exposed to several risk factors associated with musculoskeletal symptoms in the lower back as well as in the neck and upper limbs. Vibration has been suggested to be a main risk factor. These drivers are exposed to both whole-body vibration (WBV) and hand-arm vibration (HAV). Aim: This study establishes the association between driving terrain vehicles and musculoskeletal disorders (MSDs) in the neck and upper limbs as well as hand-arm vibration syndrome (HAVS). In addition, this study examines the effect on muscles in the neck and upper limbs of the type of vibration exposure that occurs in occupational driving of terrain vehicles. Methods and results: In Paper I, a cross-sectional questionnaire study on occupational drivers of terrain vehicles, increased Prevalence Odds Ratios (POR) were found for numbness, sensation of cold and white fingers (POR 1.5-3.9) and for MSDs in the neck (POR 2.1-3.9), shoulder (POR 1.8-2.6) and wrist (POR 1.7-2.6). For the shoulders, neck and elbow, there appears to be a pattern of increased odds with increasing exposure time. In Paper II, an experimental study on the trapezius muscle, which included 20 men and 17 women, the mean frequency of the electromyography signal (EMGMNF) decreased significantly more in a three minute sub-maximal contraction without vibration (-3.71Hz and -4.37Hz) compared to with induced vibration (-3.54Hz and -1.48Hz). In Paper III, a higher initial increase of the mean of the root-mean-square of the electromyography signal (EMGRMS) was seen in a three minute sub-maximal contraction with vibration exposure compared to without vibration (0.096% vs. 0.045%). There was a larger mean EMGMNF decrease for NV compared to V in the total three minutes, and a larger decrease also in the first time period was seen for the NV compared to V. A small gender effect was also noticed. In Paper IV, the combination of HAV and WBV was studied in laboratory settings and resulted in a higher trapezius EMGRMS compared to the HAV and WBV separately. Conclusion: Occupational drivers of terrain vehicles are likely to experience symptoms related to HAVS and musculoskeletal symptoms in the neck and upper limbs. Local vibration does not seem to have any negative acute effects on trapezius muscle fatigue. Vibration exposure seems to cause an initial increase in muscle activity in the trapezius that could be related to recruitment on new motor-units. A combination of HAV and WBV causes a larger muscular demand on the trapezius muscle.

Place, publisher, year, edition, pages
Umeå: Samhällsmedicin och rehabilitering , 2008. , 76 p.
Series
Umeå University medical dissertations, ISSN 0346-6612 ; 1135
Keyword [en]
Electromyography, drivers, hand-arm vibration, trapezius, whole-body vibration
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-1668ISBN: 978-91-7264-506-6 (print)OAI: oai:DiVA.org:umu-1668DiVA: diva2:141762
Public defence
2008-06-13, Aulan, Vårdvetarhuset, Umeå Universitet, 901 87, 13:00 (English)
Opponent
Supervisors
Available from: 2008-05-20 Created: 2008-05-20 Last updated: 2011-04-15Bibliographically approved
List of papers
1. Hand-arm vibration syndrome (HAVS) and musculoskeletal symptoms in the neck and the upper limbs in professional drivers of terrain vehicles: a cross sectional study
Open this publication in new window or tab >>Hand-arm vibration syndrome (HAVS) and musculoskeletal symptoms in the neck and the upper limbs in professional drivers of terrain vehicles: a cross sectional study
Show others...
2006 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 37, no 6, 793-799 p.Article in journal (Refereed) Published
Keyword
Adult, Aged, Cross-Sectional Studies, Hand-Arm Vibration Syndrome/*epidemiology/*physiopathology, Humans, Logistic Models, Male, Middle Aged, Occupational Diseases/*epidemiology/*physiopathology, Off-Road Motor Vehicles, Questionnaires, Sweden/epidemiology, Upper Extremity/*physiopathology
Research subject
Physiotherapy
Identifiers
urn:nbn:se:umu:diva-5999 (URN)10.1016/j.apergo.2005.09.004 (DOI)16380073 (PubMedID)
Available from: 2008-01-09 Created: 2008-01-09 Last updated: 2017-12-14Bibliographically approved
2. Changes in EMG activity in the upper trapezius muscle due to local vibration exposure.
Open this publication in new window or tab >>Changes in EMG activity in the upper trapezius muscle due to local vibration exposure.
Show others...
2009 (English)In: Journal of Electromyography & Kinesiology, ISSN 1050-6411, E-ISSN 1873-5711, Vol. 19, no 3, 407-415 p.Article in journal (Refereed) Published
Abstract [en]

Exposure to vibration is suggested as a risk factor for developing neck and shoulder disorders in working life. Mechanical vibration applied to a muscle belly or a tendon can elicit a reflex muscle contraction, also called tonic vibration reflex, but the mechanisms behind how vibration could cause musculoskeletal disorders has not yet been described. One suggestion has been that the vibration causes muscular fatigue. This study investigates whether vibration exposure changes the development of muscular fatigue in the trapezius muscle. Thirty-seven volunteers (men and women) performed a sub-maximal isometric shoulder elevation for 3min. This was repeated four times, two times with induced vibration and two times without. Muscle activity was measured before and after each 3-min period to look at changes in the electromyography parameters. The result showed a significantly smaller mean frequency decrease when performing the shoulder elevation with vibration (-2.51Hz) compared to without vibration (-4.04Hz). There was also a slightly higher increase in the root mean square when exposed to vibration (5.7% of maximal voluntary contraction) compared to without (3.8% of maximal voluntary contraction); however, this was not statistically significant. The results of the present study indicate that short-time exposure to vibration has no negative acute effects on the fatiguing of upper trapezius muscle.

National Category
Neurosciences Physiology
Research subject
Physiotherapy
Identifiers
urn:nbn:se:umu:diva-20909 (URN)10.1016/j.jelekin.2007.11.003 (DOI)18096405 (PubMedID)
Available from: 2009-03-27 Created: 2009-03-27 Last updated: 2017-06-01
3. Trapezius muscle activity during simultaneous exposure to local vibration and static muscle load: a study of acute effects
Open this publication in new window or tab >>Trapezius muscle activity during simultaneous exposure to local vibration and static muscle load: a study of acute effects
Show others...
Manuscript (Other academic)
Identifiers
urn:nbn:se:umu:diva-3241 (URN)
Available from: 2008-05-20 Created: 2008-05-20 Last updated: 2010-01-13Bibliographically approved
4. The effect of a combined hand-arm and whole-body vibration exposure on muscular activity in neck, lower back and arms
Open this publication in new window or tab >>The effect of a combined hand-arm and whole-body vibration exposure on muscular activity in neck, lower back and arms
Show others...
Manuscript (Other academic)
Identifiers
urn:nbn:se:umu:diva-3242 (URN)
Available from: 2008-05-20 Created: 2008-05-20 Last updated: 2010-01-13Bibliographically approved

Open Access in DiVA

fulltext(1285 kB)2319 downloads
File information
File name FULLTEXT01.pdfFile size 1285 kBChecksum SHA-1
dcd580b5b29f7a4f5d2c6876ec1f93858e6d2932e06967c1538b432604acc94e65e6fb7d
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Åström, Charlotte
By organisation
Department of Community Medicine and Rehabilitation
Physiotherapy

Search outside of DiVA

GoogleGoogle Scholar
Total: 2319 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 755 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf