Spinal and supraspinal mechanisms affecting torque development at different joint angles
| Autor: | Papaiordanidou , Maria, Mustacchi , Valérie, Stevenot , Jean-Damien, Vanoncini , Michele, Martin , Alain |
|---|---|
| Přispěvatelé: | Institut des Sciences du Mouvement Etienne Jules Marey ( ISM ), Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ), Cognition, Action, et Plasticité Sensorimotrice [Dijon - U1093] ( CAPS ), Université de Bourgogne ( UB ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Institut des Sciences du Mouvement Etienne Jules Marey (ISM), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Cognition, Action, et Plasticité Sensorimotrice [Dijon - U1093] (CAPS), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
body regions
musculoskeletal diseases electromyography neural activation [ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] muscle mechanical properties musculoskeletal system human activities spinal excitability twitch interpolation |
| Zdroj: | Muscle & nerve. Supplement. Muscle & nerve. Supplement., 2016, 53 (4), pp.626-632. 〈10.1002/mus.24895〉 Muscle & nerve. Supplement., 2016, 53 (4), pp.626-632. ⟨10.1002/mus.24895⟩ |
| DOI: | 10.1002/mus.24895〉 |
| Popis: | International audience; INTRODUCTION:We examined the neural mechanisms responsible for plantar flexion torque changes at different joint positions.METHODS:Nine subjects performed maximal voluntary contractions (MVC) at 6 ankle-knee angle combinations [3 ankle angles (dorsiflexion, anatomic position, plantar flexion) and 2 knee angles (flexion, full extension)]. Neural mechanisms were determined by V-wave, H-reflex (at rest and during MVC), and electromyography during MVC (RMS), normalized to the muscle compound action potential (V/Msup , Hmax /Mmax , Hsup /Msup and RMS/Msup ) and voluntary activation (VA), while muscle function was assessed by doublet amplitude.RESULTS:MVC and doublet amplitude were significantly lower at plantar flexion (P < 0.01), while VA was significantly lower at dorsiflexion and full knee extension (P < 0.05). V/Msup and RMS/Msup were significantly lower at knee extension (P < 0.01), while Hsup /Msup was not affected by joint angle.CONCLUSIONS:These results indicate that joint positions leading to muscle lengthening produce reduced neural drive, due mainly to supraspinal mechanisms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|