Flexion-relaxation ratio in computer workers with and without chronic neck pain.
This study evaluated the flexion-relaxation phenomenon (FRP) and flexion-relaxation ratios (FR-ratios) using surface electromyography (sEMG) of the cervical extensor muscles of computer workers with and without chronic neck pain, as well as of healthy subjects who were not computer users. This study...
| Publicado en: | Journal of Electromyography & Kinesiology Vol. 26; pp. 8 - 18 |
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| Autores principales: | , , , |
| Formato: | research Journal Article |
| Publicado: |
Elsevier B.V.
Feb2016
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=112947538&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 112947538 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10506411 JIX jtl: Journal of Electromyography & Kinesiology issn: 10506411 maglogo: N pubinfo: dt: Feb2016 vid: 26 pid: 467 pub: Elsevier B.V. place: New York, New York artinfo: ui: 112947538 112947538 NLM26799604 112947538 10.1016/j.jelekin.2015.12.011 NLM26799604 112947538 ppf: 8 ppct: 10 formats: tig: atl: Flexion-relaxation ratio in computer workers with and without chronic neck pain. aug: au: Pinheiro, Carina Ferreira Santos, Marina Foresti dos Chaves, Thais Cristina dos Santos, Marina Foresti affil: Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil sug: subj: Chronic Pain Diagnosis Muscle Contraction Physiology Neck Pain Diagnosis Muscle Relaxation Physiology Occupational Exposure Adverse Effects Computers and Computerization Utilization Human Neck Muscles Physiology Chronic Pain Physiopathology Male Neck Pain Physiopathology Adult Range of Motion Physiology Electromyography Methods Female Validation Studies Comparative Studies Evaluation Research Multicenter Studies Adult: 19-44 years Male Female ab: This study evaluated the flexion-relaxation phenomenon (FRP) and flexion-relaxation ratios (FR-ratios) using surface electromyography (sEMG) of the cervical extensor muscles of computer workers with and without chronic neck pain, as well as of healthy subjects who were not computer users. This study comprised 60 subjects 20-45years of age, of which 20 were computer workers with chronic neck pain (CPG), 20 were computer workers without neck pain (NPG), and 20 were control individuals who do not use computers for work and use them less than 4h/day for other purposes (CG). FRP and FR-ratios were analyzed using sEMG of the cervical extensors. Analysis of FR-ratios showed smaller values in the semispinalis capitis muscles of the two groups of workers compared to the control group. The reference FR-ratio (flexion relaxation ratio [FRR], defined as the maximum activity in 1s of the re-extension/full flexion sEMG activity) was significantly higher in the computer workers with neck pain compared to the CG (CPG: 3.10, 95% confidence interval [CI95%] 2.50-3.70; NPG: 2.33, CI95% 1.93-2.74; CG: 1.99, CI95% 1.81-2.17; p<0.001). The FR-ratios and FRR of sEMG in this study suggested that computer use could increase recruitment of the semispinalis capitis during neck extension (concentric and eccentric phases), which could explain our results. These results also suggest that the FR-ratios of the semispinalis may be a potential functional predictive neuromuscular marker of asymptomatic neck musculoskeletal disorders since even asymptomatic computer workers showed altered values. On the other hand, the FRR values of the semispinalis capitis demonstrated a good discriminative ability to detect neck pain, and such results suggested that each FR-ratio could have a different application. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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