Mechanomyographic amplitude and mean power frequency responses during isometric ramp vs. step muscle actions

Eric D. Ryan, Travis W. Beck, Trent J. Herda, Michael J. Hartman, Jeffrey R. Stout, Terry J. Housh, Joel T Cramer

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The purpose of the present study was to compare the mechanomyographic amplitude (MMGRMS) and mean power frequency (MMGMPF) vs. torque relationships during isometric ramp and step muscle actions for the vastus lateralis (VL) and rectus femoris (RF) muscles. Nineteen subjects (mean ± S.D. age = 24 ± 4 years) performed 2 isometric maximal voluntary contractions (MVCs) before and after 2 or 3 isometric ramp muscle actions from (5-95% MVC) to 9 submaximal step muscle actions (15, 25, 35, 45, 55, 65, 75, 85, and 95% MVC). MMG signals were recorded from the VL and RF muscles, and MMGRMS and MMGMPF values were computed for each corresponding percentage of the MVC. Absolute and normalized MMGRMS and MMGMPF vs. torque relationships were analyzed and interpreted on a subject-by-subject and composite pattern basis using polynomial regression and repeated measures ANOVAs. For MMGRMS and MMGMPF, only 16-53% and 11-26% of the individual responses were consistent with the composite polynomial models, respectively. In addition, the normalized composite MMGRMS values were greater for the RF than the VL from 35 to 85% MVC. Only 47% of the MMGRMS and 5% of the MMGMPF individual patterns of responses were the same for the ramp and step muscle actions, and differences were also observed for the composite MMGRMS and MMGMPF patterns between the ramp and step muscle actions. Overall, these findings indicated that the torque-related patterns of responses for MMGRMS and MMGMPF were different among subjects (i.e., inter-individual variability) and were muscle- (VL vs. RF) and mode-specific (ramp vs. step).

Original languageEnglish (US)
Pages (from-to)293-305
Number of pages13
JournalJournal of Neuroscience Methods
Volume168
Issue number2
DOIs
StatePublished - Mar 15 2008

Fingerprint

Architectural Accessibility
Quadriceps Muscle
Muscles
Torque
Statistical Models
Analysis of Variance

Keywords

  • Inter-individual variability
  • MMG
  • Mechanomyography
  • Rectus femoris
  • Vastus lateralis

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Mechanomyographic amplitude and mean power frequency responses during isometric ramp vs. step muscle actions. / Ryan, Eric D.; Beck, Travis W.; Herda, Trent J.; Hartman, Michael J.; Stout, Jeffrey R.; Housh, Terry J.; Cramer, Joel T.

In: Journal of Neuroscience Methods, Vol. 168, No. 2, 15.03.2008, p. 293-305.

Research output: Contribution to journalArticle

Ryan, Eric D. ; Beck, Travis W. ; Herda, Trent J. ; Hartman, Michael J. ; Stout, Jeffrey R. ; Housh, Terry J. ; Cramer, Joel T. / Mechanomyographic amplitude and mean power frequency responses during isometric ramp vs. step muscle actions. In: Journal of Neuroscience Methods. 2008 ; Vol. 168, No. 2. pp. 293-305.
@article{5b8e4ebf52e945c898425f8e591f4b22,
title = "Mechanomyographic amplitude and mean power frequency responses during isometric ramp vs. step muscle actions",
abstract = "The purpose of the present study was to compare the mechanomyographic amplitude (MMGRMS) and mean power frequency (MMGMPF) vs. torque relationships during isometric ramp and step muscle actions for the vastus lateralis (VL) and rectus femoris (RF) muscles. Nineteen subjects (mean ± S.D. age = 24 ± 4 years) performed 2 isometric maximal voluntary contractions (MVCs) before and after 2 or 3 isometric ramp muscle actions from (5-95{\%} MVC) to 9 submaximal step muscle actions (15, 25, 35, 45, 55, 65, 75, 85, and 95{\%} MVC). MMG signals were recorded from the VL and RF muscles, and MMGRMS and MMGMPF values were computed for each corresponding percentage of the MVC. Absolute and normalized MMGRMS and MMGMPF vs. torque relationships were analyzed and interpreted on a subject-by-subject and composite pattern basis using polynomial regression and repeated measures ANOVAs. For MMGRMS and MMGMPF, only 16-53{\%} and 11-26{\%} of the individual responses were consistent with the composite polynomial models, respectively. In addition, the normalized composite MMGRMS values were greater for the RF than the VL from 35 to 85{\%} MVC. Only 47{\%} of the MMGRMS and 5{\%} of the MMGMPF individual patterns of responses were the same for the ramp and step muscle actions, and differences were also observed for the composite MMGRMS and MMGMPF patterns between the ramp and step muscle actions. Overall, these findings indicated that the torque-related patterns of responses for MMGRMS and MMGMPF were different among subjects (i.e., inter-individual variability) and were muscle- (VL vs. RF) and mode-specific (ramp vs. step).",
keywords = "Inter-individual variability, MMG, Mechanomyography, Rectus femoris, Vastus lateralis",
author = "Ryan, {Eric D.} and Beck, {Travis W.} and Herda, {Trent J.} and Hartman, {Michael J.} and Stout, {Jeffrey R.} and Housh, {Terry J.} and Cramer, {Joel T}",
year = "2008",
month = "3",
day = "15",
doi = "10.1016/j.jneumeth.2007.10.010",
language = "English (US)",
volume = "168",
pages = "293--305",
journal = "Journal of Neuroscience Methods",
issn = "0165-0270",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Mechanomyographic amplitude and mean power frequency responses during isometric ramp vs. step muscle actions

AU - Ryan, Eric D.

AU - Beck, Travis W.

AU - Herda, Trent J.

AU - Hartman, Michael J.

AU - Stout, Jeffrey R.

AU - Housh, Terry J.

AU - Cramer, Joel T

PY - 2008/3/15

Y1 - 2008/3/15

N2 - The purpose of the present study was to compare the mechanomyographic amplitude (MMGRMS) and mean power frequency (MMGMPF) vs. torque relationships during isometric ramp and step muscle actions for the vastus lateralis (VL) and rectus femoris (RF) muscles. Nineteen subjects (mean ± S.D. age = 24 ± 4 years) performed 2 isometric maximal voluntary contractions (MVCs) before and after 2 or 3 isometric ramp muscle actions from (5-95% MVC) to 9 submaximal step muscle actions (15, 25, 35, 45, 55, 65, 75, 85, and 95% MVC). MMG signals were recorded from the VL and RF muscles, and MMGRMS and MMGMPF values were computed for each corresponding percentage of the MVC. Absolute and normalized MMGRMS and MMGMPF vs. torque relationships were analyzed and interpreted on a subject-by-subject and composite pattern basis using polynomial regression and repeated measures ANOVAs. For MMGRMS and MMGMPF, only 16-53% and 11-26% of the individual responses were consistent with the composite polynomial models, respectively. In addition, the normalized composite MMGRMS values were greater for the RF than the VL from 35 to 85% MVC. Only 47% of the MMGRMS and 5% of the MMGMPF individual patterns of responses were the same for the ramp and step muscle actions, and differences were also observed for the composite MMGRMS and MMGMPF patterns between the ramp and step muscle actions. Overall, these findings indicated that the torque-related patterns of responses for MMGRMS and MMGMPF were different among subjects (i.e., inter-individual variability) and were muscle- (VL vs. RF) and mode-specific (ramp vs. step).

AB - The purpose of the present study was to compare the mechanomyographic amplitude (MMGRMS) and mean power frequency (MMGMPF) vs. torque relationships during isometric ramp and step muscle actions for the vastus lateralis (VL) and rectus femoris (RF) muscles. Nineteen subjects (mean ± S.D. age = 24 ± 4 years) performed 2 isometric maximal voluntary contractions (MVCs) before and after 2 or 3 isometric ramp muscle actions from (5-95% MVC) to 9 submaximal step muscle actions (15, 25, 35, 45, 55, 65, 75, 85, and 95% MVC). MMG signals were recorded from the VL and RF muscles, and MMGRMS and MMGMPF values were computed for each corresponding percentage of the MVC. Absolute and normalized MMGRMS and MMGMPF vs. torque relationships were analyzed and interpreted on a subject-by-subject and composite pattern basis using polynomial regression and repeated measures ANOVAs. For MMGRMS and MMGMPF, only 16-53% and 11-26% of the individual responses were consistent with the composite polynomial models, respectively. In addition, the normalized composite MMGRMS values were greater for the RF than the VL from 35 to 85% MVC. Only 47% of the MMGRMS and 5% of the MMGMPF individual patterns of responses were the same for the ramp and step muscle actions, and differences were also observed for the composite MMGRMS and MMGMPF patterns between the ramp and step muscle actions. Overall, these findings indicated that the torque-related patterns of responses for MMGRMS and MMGMPF were different among subjects (i.e., inter-individual variability) and were muscle- (VL vs. RF) and mode-specific (ramp vs. step).

KW - Inter-individual variability

KW - MMG

KW - Mechanomyography

KW - Rectus femoris

KW - Vastus lateralis

UR - http://www.scopus.com/inward/record.url?scp=38749108527&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38749108527&partnerID=8YFLogxK

U2 - 10.1016/j.jneumeth.2007.10.010

DO - 10.1016/j.jneumeth.2007.10.010

M3 - Article

VL - 168

SP - 293

EP - 305

JO - Journal of Neuroscience Methods

JF - Journal of Neuroscience Methods

SN - 0165-0270

IS - 2

ER -