Back to Search Start Over

Method of analysis influences interpretations of sex-related differences in firing rates during prolonged submaximal isometric contractions

Method of analysis influences interpretations of sex-related differences in firing rates during prolonged submaximal isometric contractions

Authors :
Hannah L, Dimmick
Michael A, Trevino
Jonathan D, Miller
Mandy E, Parra
Adam J, Sterczala
Trent J, Herda
Source :
Journal of musculoskeletalneuronal interactions. 22(1)
Publication Year :
2022

Abstract

This study examined motor unit (MU) firing rates during a prolonged isometric contraction of the vastus lateralis (VL) for females and males.Surface electromyographic (sEMG) signals were recorded from the VL for eleven females and twelve males during a 45-second isometric trapezoid muscle actions at 40% of maximal voluntary contraction (MVC). For each MU, mean firing rate (MFR) was calculated for the initial and final 10-second epochs of the steady torque segment and regressed against recruitment threshold (RT, expressed as %MVC), as well as time at recruitment (TSignificant differences existed across epochs for the y-intercepts (P=0.009) of the MFR vs. TAnalysis method may impact interpretation of firing rate behavior; increases in MU firing rates across a prolonged isometric contraction were observed in the MFR vs. T

Details

ISSN :
11087161
Volume :
22
Issue :
1
Database :
OpenAIRE
Journal :
Journal of musculoskeletalneuronal interactions
Accession number :
edsair.pmid..........739f82ad1aaeb1bd6e5dd997d5f1805f