Collins, A.F., Brown, S.T.R. and Baker, M.R. (2020) Minimum EMG burst duration in healthy controls : implications for electrodiagnosis in movement disorders. Movement Disorders Clinical Practice, 7 (7). pp. 827-833. ISSN 2330-1619
Abstract
Background
EMG burst duration can provide additional diagnostic information when investigating hyperkinetic movement disorders, particularly when a functional movement disorder is suspected. It is generally accepted that EMG bursts <50ms are pathological.
Objective
To re‐assess minimum physiological EMG burst duration.
Methods
Surface EMG was recorded from face, trunk and limb muscles in controls (n=60; age 19‐85). Subjects were instructed to generate the briefest possible ballistic movements involving each muscle (40 repetitions) or, in muscles spanning joints, to generate rapid rhythmic alternating movements (20‐30s), or both.
Results
We found no effect of age on EMG burst duration. However, EMG burst duration varied significantly between body regions. Rhythmic EMG bursts were shorter than ballistic bursts but only significantly so for lower limbs (p<0.001). EMG bursts of duration <50ms were frequently observed, particularly in appendicular muscles.
Conclusion
We present normal reference data for minimum EMG burst duration, which may assist clinical interpretation when investigating hyperkinetic movement disorders.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 International Parkinson and Movement Disorder Society. This is an author-produced version of a paper subsequently published in Movement Disorders Clinical Practice. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | (up to 5) EMG; functional movement disorders; myoclonus |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > Department of Neuroscience (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 14 Aug 2020 06:53 |
Last Modified: | 25 Jan 2022 08:26 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1002/mdc3.13044 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:164410 |