A5069954550- Muscle activation and electromyography studies
- Motor Control and Adaptation
- Sports Performance and Training
- Sports injuries and prevention
- EEG and Brain-Computer Interfaces
- Tendon Structure and Treatment
- Neuroscience and Neural Engineering
- Lower Extremity Biomechanics and Pathologies
- Balance, Gait, and Falls Prevention
- Cardiovascular and exercise physiology
- Advanced Sensor and Energy Harvesting Materials
- Musculoskeletal pain and rehabilitation
- Cerebral Palsy and Movement Disorders
- Ultrasound Imaging and Elastography
- Electrical and Bioimpedance Tomography
- Body Composition Measurement Techniques
- Exercise and Physiological Responses
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Peripheral Nerve Disorders
- Orthopedic Surgery and Rehabilitation
- Transcranial Magnetic Stimulation Studies
- Muscle Physiology and Disorders
- Children's Physical and Motor Development
- Heart Rate Variability and Autonomic Control
- Botulinum Toxin and Related Neurological Disorders
The University of Queensland
2016-2025
Laboratoire Motricité Humaine Éducation Sport Santé
2021-2025
Université Côte d'Azur
2018-2025
Institut Universitaire de France
2017-2024
Observatoire de la Côte d’Azur
2022-2024
Nantes Université
2014-2023
Institut de Biologie Valrose
2018-2023
Laboratoire Motricité, Interactions, Performance
2011-2023
Imperial College London
2023
National Health and Medical Research Council
2013-2021
The aim of the present study was to assess reliability shear elastic modulus measurements performed using supersonic imaging (SSI) in nine resting muscles (i.e. gastrocnemius medialis, tibialis anterior, vastus lateralis, rectus femoris, triceps brachii, biceps brachioradialis, adductor pollicis obliquus and abductor digiti minimi) different architectures typologies. Thirty healthy subjects were randomly assigned intra-session (n = 20), inter-day 21) inter-observer 16) experiments. Muscle...
This pilot study was designed to determine whether the shear elastic modulus measured using supersonic imaging can be used accurately estimate muscle activity level. Using direct visual feedback of torque, six healthy subjects were asked perform two incremental isometric elbow flexions, consisting linear torque ramps 30 s from 0 40% maximal voluntary contraction. Both electromyographic (EMG) and continuously in biceps brachii during ramps. There significant regression (P<0.001) between EMG...
Our aim was to determine whether muscle synergies are similar across trained cyclists (and thus the same locomotor strategies for pedaling used), despite interindividual variability of individual EMG patterns. Nine were tested during a constant-load exercise performed at 80% maximal power. Surface signals measured in 10 lower limb muscles. A decomposition algorithm (nonnegative matrix factorization) applied set 40 consecutive cycles differentiate synergies. We selected least number that...
The purpose of the present study was to determine whether muscle synergies are constrained by changes in mechanics pedaling. decomposition algorithm used identify based on two components: "muscle synergy vectors," which represent relative weighting each within synergy, and "synergy activation coefficients," contribution overall activity pattern. We hypothesized that vectors would remain fixed but coefficients could vary, resulting observed variations individual electromyographic (EMG)...
Background Estimation of an individual muscle force still remains one the main challenges in biomechanics. In this way, present study aimed: (1) to determine whether elastography technique called Supersonic Shear Imaging (SSI) could be used estimate force, (2) compare estimation that provided by surface electromyography (EMG), and (3) effect pennation fibers on accuracy estimation. Methods Results Eleven subjects participated two experimental sessions; was devoted shear elastic modulus...
Electromechanical delay (EMD) represents the time lag between muscle activation and force production is used to assess function in healthy pathological subjects. There no experimental methodology quantify actual contribution of each series elastic component structures that together contribute EMD. We designed present study determine, using very high frame rate ultrasound (4 kHz), onset fascicles tendon motion induced by electrical stimulation. Nine subjects underwent two bouts composed five...
The purpose of the present study was to determine whether subjects who have learned a complex motor skill exhibit similar neuromuscular control strategies. We studied population experienced gymnasts during backward giant swings on high bar. This cyclic movement is interesting because it requires learning, as untrained are unable perform this task. Nine were tested. Both kinematics and electromyographic (EMG) patterns 12 upper-limb trunk muscles recorded. Muscle synergies extracted by...
Changes in muscle stiffness after exercise-induced damage have been classically inferred from passive torque-angle curves. Elastographic techniques can be used to estimate the shear modulus of a localized muscular area. This study aimed quantify changes elastic different regions elbow flexors eccentric exercise and their relation length.Shear transverse relaxation time (T2 ) were measured biceps brachii brachialis muscles sixteen participants, before, 1 h, 48 h 21 days three sets ten maximal...
To compare tendon elastic and structural properties of healthy individuals with those Achilles or patellar tendinopathy. Sixty-seven participants (22 tendinopathy, 17 28 controls) were recruited between March 2015 2016. Shear wave velocity (SWV), an index tissue modulus, thickness measured bilaterally at mid-tendon insertional regions tendons by examiner blinded to group. Analysis covariance, adjusted for age, body mass index, sex was used differences in SWV the two tendinopathy groups...
Assessment of muscle mechanical properties may provide clinically valuable information for follow-up patients with Duchenne muscular dystrophy (DMD) through the course their disease. In this study we aimed to assess effect DMD on stiffness relaxed muscles using elastography (supersonic shear imaging).Fourteen and 13 control subjects were studied. Six measured at 2 lengths (shortened stretched): gastrocnemius medialis (GM); tibialis anterior (TA); vastus lateralis (VL); biceps brachii (BB);...
It has been proposed that movements are produced through groups of muscles, or motor modules, activated by common neural commands. However, the origin modules is still debated. Here, we used complementary approaches to determine: 1) whether three muscles same muscle group [soleus, gastrocnemius medialis (GM), and lateralis (GL)] a drive, 2) drive GM GL could be differentially modified altering mechanical requirements task. Eighteen human participants performed an isometric standing heel...
Abstract It is challenging to differentiate the mechanical properties of synergist muscles in vivo . Shear wave elastography can be used quantify shear modulus (i.e. an index stiffness) a specific muscle. This study assessed passive behavior lower leg during dorsiflexion performed with knee fully extended (experiment 1, n = 22) or flexed at 90° 2, 20). The measurements were repeated twice experiment 1 assess inter‐day reliability. During both experiments, following plantar flexors was...
Redundancy of the neuromuscular system theoretically allows for a redistribution neural drive across muscles (i.e., between-muscle compensation) during fatiguing contraction. Our results suggest that high level common input between (e.g., vastus lateralis and medialis) represents constraint making it less likely to redistribute these muscles. In this way, was only observed share little synaptic gastrocnemius medialis).