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Cortical motor output decreases after neuromuscular fatigue induced by electrical stimulation of the plantar flexor muscles
- Source :
- Acta Physiologica, Acta Physiologica, Wiley, 2015, 214 (1), pp.124-134. ⟨10.1111/apha.12478⟩, Acta Physiologica, Wiley, 2015, 214 (1), pp.124-134. 〈10.1111/apha.12478〉
- Publication Year :
- 2015
- Publisher :
- Wiley, 2015.
-
Abstract
- Aim Neuromuscular electrical stimulation (NMES) causes early onset of neuromuscular fatigue. Peripheral electrophysiological explorations suggest that supra-spinal alterations are involved through sensitive afferent pathways. As sensory input is projected over the primary somatosensory cortex (S1), S1 area involvement in inhibiting the central motor drive can be hypothesized. This study assessed cortical activity under a fatiguing NMES protocol at low frequency. Methods Twenty healthy males performed five NMES sequences of 17 trains over the plantar flexors (30 Hz, 4 s on/6 s off). Before and after each sequence, neuromuscular tests composed of maximal voluntary contractions (MVCs) were carried out. Cortical activity was assessed during MVCs with functional near-infrared spectroscopy over S1 and primary motor (M1) areas, through oxy- [HbO] and deoxy-haemoglobin [HbR] variation. Electrophysiological data (H-reflex during MVC, EMG activity and level of voluntary activation) were also recorded. Results MVC torque significantly decreased after the first 17 NMES trains (P
- Subjects :
- Adult
Male
Recruitment, Neurophysiological
[SDV.MHEP.PHY] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]
Physiology
Stimulation
Inhibitory postsynaptic potential
Somatosensory system
Plantar flexion
Young Adult
03 medical and health sciences
0302 clinical medicine
[SDV.MHEP.PHY]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]
Humans
Medicine
Muscle, Skeletal
ComputingMilieux_MISCELLANEOUS
Electromyography
[ SDV.MHEP.PHY ] Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO]
business.industry
[SCCO.NEUR]Cognitive science/Neuroscience
[SCCO.NEUR] Cognitive science/Neuroscience
Motor Cortex
030229 sport sciences
Evoked Potentials, Motor
Electric Stimulation
Peripheral
Electrophysiology
medicine.anatomical_structure
Anesthesia
Muscle Fatigue
[ SCCO.NEUR ] Cognitive science/Neuroscience
Functional near-infrared spectroscopy
business
Neuroscience
030217 neurology & neurosurgery
Muscle Contraction
Motor cortex
Subjects
Details
- ISSN :
- 17481708 and 17481716
- Volume :
- 214
- Database :
- OpenAIRE
- Journal :
- Acta Physiologica
- Accession number :
- edsair.doi.dedup.....8b9e24fb2ea170d2ea857580c9598a45