Electromechanical delay components during relaxation after voluntary contraction: Reliability and effects of fatigue

Emiliano Cè; Susanna Rampichini; Massimo Venturelli; Eloisa Limonta; Arsenio Veicsteinas; Fabio Esposito

doi:10.1002/mus.24466

Electromechanical delay components during relaxation after voluntary contraction: Reliability and effects of fatigue

Emiliano Cè, Susanna Rampichini, Massimo Venturelli, Eloisa Limonta, Arsenio Veicsteinas, Fabio Esposito

Fondazione Don Carlo Gnocchi Onlus

Research output: Contribution to journal › Article › peer-review

Abstract

Introduction: Fatigue effects on total relaxation delay (R-Delay_TOT) components and measurement reliability were investigated. Methods: Electromyogram (EMG), force (F), and mechanomyogram (MMG) were recorded during maximum voluntary contraction from the biceps brachii muscle before and after fatigue. The delays between EMG cessation and onset of F decay (R-EMD), between F decay and onset of MMG largest displacement (MMG p-p) (R-Δt F-MMG), from the beginning to the end of MMG p-p (R-Δt MMG_p-p), and from the end of MMG p-p to F cessation (R-Δt MMG-F_end) were calculated. Results: R-Delay_TOT lasted 366±10 ms. R-EMD, R-Δt F-MMG, R-Δt MMG_p-p, and R-Δt MMG-F_end accounted for 6%, 8%, 59%, and 27% of R-Delay_TOT, respectively. After fatigue, R-Delay_TOT, R-EMD, R-Δt F-MMG, and R-Δt MMG_p-p increased by 38%, 22%, 40%, 40%, and 38%, respectively (Pp-p was the main contributor to R-Delay_TOT. Fatigue affected all R-Delay_TOT contributors, with a smaller effect on R-EMD.

Original language	English
Pages (from-to)	907-915
Number of pages	9
Journal	Muscle and Nerve
Volume	51
Issue number	6
DOIs	https://doi.org/10.1002/mus.24466
Publication status	Published - Jun 1 2015

Keywords

Electromyogram
Force
Latency
Mechanomyogram
Myotonia

ASJC Scopus subject areas

Clinical Neurology
Cellular and Molecular Neuroscience
Physiology (medical)
Physiology
Medicine(all)

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10.1002/mus.24466

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@article{ac0453d0e04a4c49a78c73e347cd60cb,

title = "Electromechanical delay components during relaxation after voluntary contraction: Reliability and effects of fatigue",

abstract = "Introduction: Fatigue effects on total relaxation delay (R-DelayTOT) components and measurement reliability were investigated. Methods: Electromyogram (EMG), force (F), and mechanomyogram (MMG) were recorded during maximum voluntary contraction from the biceps brachii muscle before and after fatigue. The delays between EMG cessation and onset of F decay (R-EMD), between F decay and onset of MMG largest displacement (MMG p-p) (R-Δt F-MMG), from the beginning to the end of MMG p-p (R-Δt MMGp-p), and from the end of MMG p-p to F cessation (R-Δt MMG-Fend) were calculated. Results: R-DelayTOT lasted 366±10 ms. R-EMD, R-Δt F-MMG, R-Δt MMGp-p, and R-Δt MMG-Fend accounted for 6%, 8%, 59%, and 27% of R-DelayTOT, respectively. After fatigue, R-DelayTOT, R-EMD, R-Δt F-MMG, and R-Δt MMGp-p increased by 38%, 22%, 40%, 40%, and 38%, respectively (Pp-p was the main contributor to R-DelayTOT. Fatigue affected all R-DelayTOT contributors, with a smaller effect on R-EMD.",

keywords = "Electromyogram, Force, Latency, Mechanomyogram, Myotonia",

author = "Emiliano C{\`e} and Susanna Rampichini and Massimo Venturelli and Eloisa Limonta and Arsenio Veicsteinas and Fabio Esposito",

year = "2015",

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doi = "10.1002/mus.24466",

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TY - JOUR

T1 - Electromechanical delay components during relaxation after voluntary contraction

T2 - Reliability and effects of fatigue

AU - Cè, Emiliano

AU - Rampichini, Susanna

AU - Venturelli, Massimo

AU - Limonta, Eloisa

AU - Veicsteinas, Arsenio

AU - Esposito, Fabio

PY - 2015/6/1

Y1 - 2015/6/1

N2 - Introduction: Fatigue effects on total relaxation delay (R-DelayTOT) components and measurement reliability were investigated. Methods: Electromyogram (EMG), force (F), and mechanomyogram (MMG) were recorded during maximum voluntary contraction from the biceps brachii muscle before and after fatigue. The delays between EMG cessation and onset of F decay (R-EMD), between F decay and onset of MMG largest displacement (MMG p-p) (R-Δt F-MMG), from the beginning to the end of MMG p-p (R-Δt MMGp-p), and from the end of MMG p-p to F cessation (R-Δt MMG-Fend) were calculated. Results: R-DelayTOT lasted 366±10 ms. R-EMD, R-Δt F-MMG, R-Δt MMGp-p, and R-Δt MMG-Fend accounted for 6%, 8%, 59%, and 27% of R-DelayTOT, respectively. After fatigue, R-DelayTOT, R-EMD, R-Δt F-MMG, and R-Δt MMGp-p increased by 38%, 22%, 40%, 40%, and 38%, respectively (Pp-p was the main contributor to R-DelayTOT. Fatigue affected all R-DelayTOT contributors, with a smaller effect on R-EMD.

AB - Introduction: Fatigue effects on total relaxation delay (R-DelayTOT) components and measurement reliability were investigated. Methods: Electromyogram (EMG), force (F), and mechanomyogram (MMG) were recorded during maximum voluntary contraction from the biceps brachii muscle before and after fatigue. The delays between EMG cessation and onset of F decay (R-EMD), between F decay and onset of MMG largest displacement (MMG p-p) (R-Δt F-MMG), from the beginning to the end of MMG p-p (R-Δt MMGp-p), and from the end of MMG p-p to F cessation (R-Δt MMG-Fend) were calculated. Results: R-DelayTOT lasted 366±10 ms. R-EMD, R-Δt F-MMG, R-Δt MMGp-p, and R-Δt MMG-Fend accounted for 6%, 8%, 59%, and 27% of R-DelayTOT, respectively. After fatigue, R-DelayTOT, R-EMD, R-Δt F-MMG, and R-Δt MMGp-p increased by 38%, 22%, 40%, 40%, and 38%, respectively (Pp-p was the main contributor to R-DelayTOT. Fatigue affected all R-DelayTOT contributors, with a smaller effect on R-EMD.

KW - Electromyogram

KW - Force

KW - Latency

KW - Mechanomyogram

KW - Myotonia

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Electromechanical delay components during relaxation after voluntary contraction: Reliability and effects of fatigue

Abstract

Keywords

ASJC Scopus subject areas

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