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Forearm muscle activity is modified bilaterally in unilateral lateral epicondylalgia: A case-control study

journal contribution
posted on 26.07.2018, 00:00 by Luke Heales, B Vicenzino, DA MacDonald, PW Hodges
Lateral epicondylalgia (LE) is associated with a reduced wrist extensor muscle activity and altered biomechanics. This study compared the coordination between forearm muscles during gripping in individuals with LE and pain-free controls. Intramuscular electrodes recorded myoelectric activity from extensor carpi radialis brevis/longus (ECRB/ECRL), extensor digitorum communis (EDC), flexor digitorum superficialis/profundus (FDS/FDP), and flexor carpi radialis (FCR), bilaterally, in 15 participants with unilateral LE and 15 pain-free controls. Participants performed a gripping task at 20% maximum force in four arm positions. The contribution of each muscle was expressed as a proportion of the summed electromyography of all muscles. In individuals with LE, ECRB contributed less to total electromyography in the symptomatic arm but not the asymptomatic arm than pain-free controls. The contribution of EDC and FDP to total electromyography was greater in both the symptomatic and asymptomatic arm of the LE group, than pain-free controls. No other differences were observed between groups. Subtle differences in muscle activation were present with differing arm positions. These findings indicate forearm muscle activity is modified in LE. It is unknown whether this is cause or effect. Changes in the asymptomatic side may imply involvement of central mechanisms. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

26

Issue

12

Start Page

1382

End Page

1390

Number of Pages

9

eISSN

1600-0838

ISSN

0905-7188

Publisher

Wiley-Blackwell Publishing Ltd.

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

University of Queensland

Era Eligible

Yes

Journal

Scandinavian Journal of Medicine and Science in Sports

Exports

CQUniversity

Exports