Evidence map›Paper›PMID 25210159›Full record

ArticleJournal of neurophysiology2014

Error reduction in EMG signal decomposition.

Joshua C Kline, Carlo J De Luca

Abstract read
In one paragraph

Article in Journal of neurophysiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Joshua C KlineNeuroMuscular Research Center, Boston University, Boston, Massachusetts; Department of Biomedical Engineering, Boston University, Boston, Massachusetts;
Carlo J De LucaNeuroMuscular Research Center, Boston University, Boston, Massachusetts; Department of Biomedical Engineering, Boston University, Boston, Massachusetts; Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts; Department of Neurology, Boston University, Boston, Massachusetts; Department of Physical Therapy, Boston University, Boston, Massachusetts; and Delsys, Natick, Massachusetts cjd@bu.edu.

Funding

Non-invasive System for Identifying Motoneuron BehaviorR44NS077526 · NINDS · ALTEC, INC. · PI DE LUCA, GIANLUCA · 2014 to 2020
$3.5M
Harnessing Motoneuron Activity: From Lab to ClinicR01HD050111 · NICHD · BOSTON UNIVERSITY (CHARLES RIVER CAMPUS) · PI DE LUCA, CARLO J · 2007 to 2011
$2.8M
Non-Invasive System for Identifying Motoneuron BehaviorR43NS077526 · NINDS · ALTEC, INC. · PI DE LUCA, GIANLUCA · 2012 to 2013
$642k
NICHD NIH HHS HD05011NICHD NIH HHS R01 HD050111NINDS NIH HHS NS077526-01NINDS NIH HHS R44 NS077526
6 · The paper itself

Abstract

Decomposition of the electromyographic (EMG) signal into constituent action potentials and the identification of individual firing instances of each motor unit in the presence of ambient noise are inherently probabilistic processes, whether performed manually or with automated algorithms. Consequently, they are subject to errors. We set out to classify and reduce these errors by analyzing 1,061 motor-unit action-potential trains (MUAPTs), obtained by decomposing surface EMG (sEMG) signals recorded during human voluntary contractions. Decomposition errors were classified into two general categories: location errors representing variability in the temporal localization of each motor-unit firing instance and identification errors consisting of falsely detected or missed firing instances. To mitigate these errors, we developed an error-reduction algorithm that combines multiple decomposition estimates to determine a more probable estimate of motor-unit firing instances with fewer errors. The performance of the algorithm is governed by a trade-off between the yield of MUAPTs obtained above a given accuracy level and the time required to perform the decomposition. When applied to a set of sEMG signals synthesized from real MUAPTs, the identification error was reduced by an average of 1.78%, improving the accuracy to 97.0%, and the location error was reduced by an average of 1.66 ms. The error-reduction algorithm in this study is not limited to any specific decomposition strategy. Rather, we propose it be used for other decomposition methods, especially when analyzing precise motor-unit firing instances, as occurs when measuring synchronization.

Indexed as

AlgorithmsElectromyographyEvoked Potentials, MotorFemaleHumansIsometric ContractionMaleSignal-To-Noise RatioYoung Adultaccuracydecompositionerror reductionmotor-unit firing instancessurface EMG signal

Identifiers

PMID25210159
PMCPMC4254880

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.