VMO - VL reflex latency difference in osteoarthritic knees and controls

Hdl Handle:
http://hdl.handle.net/10149/58203
Title:
VMO - VL reflex latency difference in osteoarthritic knees and controls
Authors:
Dixon, J. (John); Howe, T. E. (Tracey); Kent, J. R. (Jillian); Whittaker, V. J. (Victoria)
Affiliation:
University of Teesside. Teesside Centre for Rehabilitation Sciences; The James Cook University Hospital.
Citation:
Dixon, J. et al. (2004) 'VMO - VL reflex latency difference in osteoarthritic knees and controls', Advances in Physiotherapy, 6 (46), pp.166-172.
Publisher:
Taylor & Francis
Journal:
Advances in Physiotherapy
Issue Date:
2004
URI:
http://hdl.handle.net/10149/58203
DOI:
10.1080/14038190410020809
Abstract:
It was hypothesized that onset of reflex electromyographic (EMG) activity of vastus medialis oblique (VMO) was delayed relative to that of vastus lateralis (VL) in patients with osteoarthritis (OA) of the knee compared to controls. Three subject groups were tested: young asymptomatics (n=20), mean (±SD) 31.1±7.9 years; older asymptomatics (n=17), 56.7±8.6 years; and symptomatic OA knee patients, diagnosed by an orthopaedic surgeon (n=16), 65.9±7.8 years. The patellar tendon reflex latencies of VMO and VL were measured using surface EMG, and the reflex latency difference (RLD) between the two muscles was calculated for each subject. Mean RLD values were 0.75±1.17, 1.05±1.06 and 1.27±0.81 ms for young asymptomatics, older asymptomatics and OA knee patients respectively, indicating that on average VMO was activated after VL in all groups. However, analysis of variance showed that these RLD values were not significantly different between the groups, F(2,50)=1.140, p=0.33. The results demonstrate that the onset of reflex VMO EMG activity relative to VL is not delayed in OA knee patients compared to controls. This has important implications for rehabilitation programmes aimed at developing preferential activation of VMO compared to VL in OA knee.
Type:
Article
Keywords:
electromyographic; EMG; vastus medialis oblique; VMO; vastus lateralis; VL; osteoarthritis; knee; reflex
ISSN:
1403-8196
Rights:
Subject to restrictions, author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 11/01/2010]
Citation Count:
4 [Scopus, 11/01/2010]

Full metadata record

DC FieldValue Language
dc.contributor.authorDixon, J. (John)-
dc.contributor.authorHowe, T. E. (Tracey)-
dc.contributor.authorKent, J. R. (Jillian)-
dc.contributor.authorWhittaker, V. J. (Victoria)-
dc.date.accessioned2009-04-01T10:45:51Z-
dc.date.available2009-04-01T10:45:51Z-
dc.date.issued2004-
dc.identifier.citationAdvances in Physiotherapy; 6 (46): 166-172-
dc.identifier.issn1403-8196-
dc.identifier.doi10.1080/14038190410020809-
dc.identifier.urihttp://hdl.handle.net/10149/58203-
dc.description.abstractIt was hypothesized that onset of reflex electromyographic (EMG) activity of vastus medialis oblique (VMO) was delayed relative to that of vastus lateralis (VL) in patients with osteoarthritis (OA) of the knee compared to controls. Three subject groups were tested: young asymptomatics (n=20), mean (±SD) 31.1±7.9 years; older asymptomatics (n=17), 56.7±8.6 years; and symptomatic OA knee patients, diagnosed by an orthopaedic surgeon (n=16), 65.9±7.8 years. The patellar tendon reflex latencies of VMO and VL were measured using surface EMG, and the reflex latency difference (RLD) between the two muscles was calculated for each subject. Mean RLD values were 0.75±1.17, 1.05±1.06 and 1.27±0.81 ms for young asymptomatics, older asymptomatics and OA knee patients respectively, indicating that on average VMO was activated after VL in all groups. However, analysis of variance showed that these RLD values were not significantly different between the groups, F(2,50)=1.140, p=0.33. The results demonstrate that the onset of reflex VMO EMG activity relative to VL is not delayed in OA knee patients compared to controls. This has important implications for rehabilitation programmes aimed at developing preferential activation of VMO compared to VL in OA knee.-
dc.publisherTaylor & Francis-
dc.rightsSubject to restrictions, author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 11/01/2010]-
dc.subjectelectromyographic-
dc.subjectEMG-
dc.subjectvastus medialis oblique-
dc.subjectVMO-
dc.subjectvastus lateralis-
dc.subjectVL-
dc.subjectosteoarthritis-
dc.subjectknee-
dc.subjectreflex-
dc.titleVMO - VL reflex latency difference in osteoarthritic knees and controls-
dc.typeArticle-
dc.contributor.departmentUniversity of Teesside. Teesside Centre for Rehabilitation Sciences; The James Cook University Hospital.-
dc.identifier.journalAdvances in Physiotherapy-
ref.assessmentRAE 2008-
ref.citationcount4 [Scopus, 11/01/2010]-
or.citation.harvardDixon, J. et al. (2004) 'VMO - VL reflex latency difference in osteoarthritic knees and controls', Advances in Physiotherapy, 6 (46), pp.166-172.-
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