AustralieFrV1, Main, Exploration, bibRecord, 002A98

Nature of the coupling between neural drive and force-generating capacity in the human quadriceps muscle

Identifieur interne : 002A98 ( Main/Exploration ); précédent : 002A97; suivant : 002A99

Nature of the coupling between neural drive and force-generating capacity in the human quadriceps muscle

Auteurs : François Hug [Australie, France] ; Clément Goupille [France] ; Daniel Baum [Australie] ; Brent J. Raiteri [Australie] ; Paul W. Hodges [Australie] ; Kylie Tucker [Australie]

Source :

Proceedings of the Royal Society B: Biological Sciences [ 0962-8452 ] ; 2015.

RBID : PMC:4685812

Descripteurs français

KwdFr :
- Adulte, Contraction isométrique, Fatigue musculaire, Femelle, Humains, Jeune adulte, Muscle quadriceps fémoral (physiologie), Mâle, Phénomènes biomécaniques, Électromyographie.
MESH :
- physiologie : Muscle quadriceps fémoral.
- Adulte, Contraction isométrique, Fatigue musculaire, Femelle, Humains, Jeune adulte, Mâle, Phénomènes biomécaniques, Électromyographie.

English descriptors

KwdEn :
- Adult, Biomechanical Phenomena, Electromyography, Female, Humans, Isometric Contraction, Male, Muscle Fatigue, Quadriceps Muscle (physiology), Young Adult.
MESH :
- physiology : Quadriceps Muscle.
- Adult, Biomechanical Phenomena, Electromyography, Female, Humans, Isometric Contraction, Male, Muscle Fatigue, Young Adult.

Abstract

The force produced by a muscle depends on both the neural drive it receives and several biomechanical factors. When multiple muscles act on a single joint, the nature of the relationship between the neural drive and force-generating capacity of the synergistic muscles is largely unknown. This study aimed to determine the relationship between the ratio of neural drive and the ratio of muscle force-generating capacity between two synergist muscles (vastus lateralis (VL) and vastus medialis (VM)) in humans. Twenty-one participants performed isometric knee extensions at 20 and 50% of maximal voluntary contractions (MVC). Myoelectric activity (surface electromyography (EMG)) provided an index of neural drive. Physiological cross-sectional area (PCSA) was estimated from measurements of muscle volume (magnetic resonance imaging) and muscle fascicle length (three-dimensional ultrasound imaging) to represent the muscles' force-generating capacities. Neither PCSA nor neural drive was balanced between VL and VM. There was a large (r = 0.68) and moderate (r = 0.43) correlation between the ratio of VL/VM EMG amplitude and the ratio of VL/VM PCSA at 20 and 50% of MVC, respectively. This study provides evidence that neural drive is biased by muscle force-generating capacity, the greater the force-generating capacity of VL compared with VM, the stronger bias of drive to the VL.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4685812

DOI: 10.1098/rspb.2015.1908
PubMed: 26609085
PubMed Central: 4685812

Affiliations:

Australie, France

Le document en format XML

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<front><div type="abstract" xml:lang="en"><p>The force produced by a muscle depends on both the neural drive it receives and several biomechanical factors. When multiple muscles act on a single joint, the nature of the relationship between the neural drive and force-generating capacity of the synergistic muscles is largely unknown. This study aimed to determine the relationship between the ratio of neural drive and the ratio of muscle force-generating capacity between two synergist muscles (vastus lateralis (VL) and vastus medialis (VM)) in humans. Twenty-one participants performed isometric knee extensions at 20 and 50% of maximal voluntary contractions (MVC). Myoelectric activity (surface electromyography (EMG)) provided an index of neural drive. Physiological cross-sectional area (PCSA) was estimated from measurements of muscle volume (magnetic resonance imaging) and muscle fascicle length (three-dimensional ultrasound imaging) to represent the muscles' force-generating capacities. Neither PCSA nor neural drive was balanced between VL and VM. There was a large (<italic>r</italic>
 = 0.68) and moderate (<italic>r</italic>
 = 0.43) correlation between the ratio of VL/VM EMG amplitude and the ratio of VL/VM PCSA at 20 and 50% of MVC, respectively. This study provides evidence that neural drive is biased by muscle force-generating capacity, the greater the force-generating capacity of VL compared with VM, the stronger bias of drive to the VL.</p>
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Nature of the coupling between neural drive and force-generating capacity in the human quadriceps muscle

Nature of the coupling between neural drive and force-generating capacity in the human quadriceps muscle

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

	Serveur d'exploration sur les relations entre la France et l'Australie
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