Imperial College London
Portrait Picture

ProfessorDarioFarina

Faculty of Engineering, Department of Bioengineering

Chair in Neurorehabilitation Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 1387d.farina Website

 
 
//

Location

 

RSM 4.15Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Avrillon:2021:10.1152/japplphysiol.00653.2020,
author = {Avrillon, S and Del, Vecchio A and Farina, D and Pons, JL and Vogel, C and Umehara, J and Hug, F},
doi = {10.1152/japplphysiol.00653.2020},
journal = {Journal of applied physiology (Bethesda, Md. : 1985)},
pages = {269--281},
title = {Individual differences in the neural strategies to control the lateral and medial head of the quadriceps during a mechanically constrained task.},
url = {http://dx.doi.org/10.1152/japplphysiol.00653.2020},
volume = {130},
year = {2021}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The interindividual variability in the neural drive sent from the spinal cord to muscles is largely unknown, even during highly constrained motor tasks. Here, we investigated individual differences in the strength of neural drive received by the vastus lateralis (VL) and vastus medialis (VM) during an isometric task. We also assessed the proportion of common neural drive within and between these muscles. Twenty-two participants performed a series of submaximal isometric knee extensions at 25% of their peak torque. High-density surface electromyography recordings were decomposed into motor unit action potentials. Coherence analyses were applied on the motor unit spike trains to assess the degree of neural drive that was shared between motor neurons. Six participants were retested ∼20 mo after the first session. The distribution of the strength of neural drive between VL and VM varied between participants and was correlated with the distribution of normalized interference electromyography (EMG) signals (r > 0.56). The level of within- and between-muscle coherence varied across individuals, with a significant positive correlation between these two outcomes (VL: r = 0.48; VM: r = 0.58). We also observed a large interindividual variability in the proportion of muscle-specific drive, that is, the drive unique to each muscle (VL range: 6%-83%, VM range: 6%-86%). All the outcome measures were robust across sessions, providing evidence that the individual differences did not depend solely on the variability of the measures. Together, these results demonstrate that the neural strategies to control the VL and VM muscles widely vary across individuals, even during a constrained task.NEW & NOTEWORTHY We observed that the distribution of the strength of neural drive between the vastus lateralis and vastus medialis during a single-joint isometric task varied across participants. Also, we observed that the proportion of ne
AU  - Avrillon,S
AU  - Del,Vecchio A
AU  - Farina,D
AU  - Pons,JL
AU  - Vogel,C
AU  - Umehara,J
AU  - Hug,F
DO  - 10.1152/japplphysiol.00653.2020
EP  - 281
PY  - 2021///
SN  - 1522-1601
SP  - 269
TI  - Individual differences in the neural strategies to control the lateral and medial head of the quadriceps during a mechanically constrained task.
T2  - Journal of applied physiology (Bethesda, Md. : 1985)
UR  - http://dx.doi.org/10.1152/japplphysiol.00653.2020
UR  - https://www.ncbi.nlm.nih.gov/pubmed/33242302
UR  - https://journals.physiology.org/doi/full/10.1152/japplphysiol.00653.2020
UR  - http://hdl.handle.net/10044/1/86596
VL  - 130
ER  -
Download