A5054997475- Muscle activation and electromyography studies
- Musculoskeletal pain and rehabilitation
- Sports Performance and Training
- Motor Control and Adaptation
- Sports injuries and prevention
- EEG and Brain-Computer Interfaces
- Shoulder Injury and Treatment
- Tendon Structure and Treatment
- Cardiovascular and exercise physiology
- Spinal Cord Injury Research
- Stroke Rehabilitation and Recovery
- Neuroscience and Neural Engineering
- Advanced Sensor and Energy Harvesting Materials
- Lower Extremity Biomechanics and Pathologies
- Balance, Gait, and Falls Prevention
- Transcranial Magnetic Stimulation Studies
- Ergonomics and Musculoskeletal Disorders
- Foot and Ankle Surgery
- Children's Physical and Motor Development
- Myofascial pain diagnosis and treatment
- Spine and Intervertebral Disc Pathology
- Neurological disorders and treatments
- Conducting polymers and applications
- Bach Studies and Logistics Development
- Cerebral Palsy and Movement Disorders
University of Birmingham
2017-2025
In-Q-Tel
2023
Universidad Mayor
2018-2022
Nike (United States)
2021
University of Potsdam
2015-2018
Key points Classic motor unit (MU) recording and analysis methods do not allow the same MUs to be tracked across different experimental sessions, therefore, there is limited evidence on adjustments in MU properties following training or during progression of neuromuscular disorders. We propose a new processing method track sessions (separated by weeks) using high‐density surface electromyography. The application proposed two experiments showed that individual can identified reliably...
Neural control of synergist muscles is not well understood. Presumably, each muscle in a synergistic group receives some unique neural drive and that also shared common with other the group. In this investigation, we sought to characterize strength, frequency spectrum, force dependence human vastus lateralis medialis during production isometric knee extension forces at 10 30% maximum voluntary effort. High-density surface electromyography recordings were decomposed into motor unit action...
Surface electromyographic (EMG) signal amplitude is typically used to compare the neural drive muscles. We experimentally investigated this association by studying motor unit (MU) behavior and action potentials in vastus medialis (VM) lateralis (VL) Eighteen participants performed isometric knee extensions at four target torques [10, 30, 50, 70% of maximum torque (MVC)] while high-density EMG signals were recorded from VM VL. The absolute was greater for than VL ( P < 0.001), whereas...
Purpose Using a novel technique of high-density surface EMG decomposition and motor unit (MU) tracking, we compared changes in the properties vastus medialis lateralis MU after endurance (END) high-intensity interval training (HIIT). Methods Sixteen men were assigned to END or HIIT group (n = 8 each) performed six sessions for 14 d. Each session consisted 8–12 × 60-s intervals at 100% peak power output separated by 75 s recovery (HIIT) 90–120 min continuous cycling ~65% V˙O2peak (END). Pre-...
Key points The neural strategies behind the control of force during muscle pain are not well understood as previous research has been limited in assessing responses only low‐force contractions. Here we compared, for first time, behaviour motor units recruited at low and high forces response to pain. results showed that activated were inhibited while those higher increased their activity When analysing lower‐ higher‐threshold unit observed differential changes discharge rate recruitment...
Conflicting results have been reported on whether closed kinetic chain exercises (such as a leg press) may induce more balanced activation of vastus medialis (VM) and lateralis (VL) muscles compared with open exercise pure knee extension). This study aimed to 1) compare between-vasti motor unit activity 2) analyze the combined behavior from both between exercises. Thirteen participants (four women, mean ± SD age: 27 5 yr) performed isometric extension press at 10, 30, 50, 70% maximum...
Abstract This study aimed to investigate the spatial distribution and redistribution of lumbar erector spinae (ES) activity during a extension endurance task in pain‐free participants how this is modified people with low back pain (LBP). High density surface electromyography (HDEMG) was recorded using 13 × 5 electrode grids placed over ES LBP control while completing an Ito test failure. The root mean square HDEMG signals computed, topographical map EMG amplitude generated centre (centroid)...
Many individuals with incomplete spinal cord injury (SCI) exhibit reduced volitional control of trunk muscles, such as impaired voluntary contractions the erector spinae (ES), due to damage neural pathways regulating sensorimotor function. Studies using conventional bipolar electromyography (EMG) showed alterations in overall, or global, activation muscles people SCI. However, how varied across specific regions within ES, referred regional activation, remains unknown. The aim study was...
Introduction Patellar tendinopathy (PT) rehabilitation programmes frequently incorporate eccentric exercise (EE), where participants have limited control over the range of motion, speed, force production and load. Newly developed training protocols that employ visual feedback with specialised devices offer controlled management loads, speeds forces across full potentially providing greater benefits. Objective This protocol outlines a randomised trial designed to compare effects visuomotor...
Motor unit firing and contractile properties during a submaximal contraction until failure were assessed with new tracking technique. Two distinct phases in behavior observed, which compensated for changes twitch area predicted time to failure. However, the late increase rate was below rates attained absence of fatigue, points an inability central nervous system sufficiently neural drive muscle fatigue.
We quantified the relationship between spatial oscillations in surface electromyographic (sEMG) activity and trunk-extension torque individuals with without chronic low back pain (CLBP), during two submaximal isometric lumbar extension tasks at 20% 50% of their maximal voluntary torque. High-density sEMG (HDsEMG) signals were recorded from erector spinae (ES) a 64-electrode grid, an isokinetic dynamometer. Coherence cross-correlation analyses applied filtered interference HDsEMG for each...
Moderate-intensity continuous training (MICT) and high-intensity interval (HIIT) are associated with different adjustments in motor output. Changes unit (MU) peripheral properties may contribute to these adjustments, but this is yet be elucidated. This study evaluated early changes MU conduction velocity (MUCV) action potential amplitude after 2 wk of either HIIT or MICT.Sixteen men were assigned an MICT group (n = 8 each), participated six sessions over 14 d. HIIT: 12 × 60-s intervals at...
Abstract Individuals with chronic ankle instability (CAI) present muscular weakness and potential changes in the activation of peroneus longus muscle, which likely explains high recurrence sprains this population. However, there is conflicting evidence regarding role activity CAI, possibly due to limited spatial resolution surface electromyography (sEMG) methods (i.e., bipolar sEMG). Recent studies employing high‐density sEMG (HD‐sEMG) have shown that presents differences regional...
ABSTRACT Purpose We quantified the relationship between high-density surface electromyographic (HDsEMG) oscillations (in both time and frequency domains) torque steadiness during submaximal concentric/eccentric trunk extension/flexion contractions, in individuals with without chronic low back pain (CLBP). Methods Comparisons were made regional differences HDsEMG amplitude HDsEMG–torque cross-correlation coherence of thoracolumbar erector spinae (ES), rectus abdominis (RA), external oblique...
Neuromuscular impairments are frequently observed in patients with chronic neck pain (CNP). This study uniquely investigates whether changes muscle synergies detected during gait sensitive enough to differentiate between people and without CNP. Surface electromyography (EMG) was recorded from the sternocleidomastoid, splenius capitis, upper trapezius muscles bilaterally 20 asymptomatic individuals CNP as they performed rectilinear curvilinear gait. Intermuscular coherence computed generate...
Muscle-tendon length can influence central and peripheral motor unit (MU) characteristics, but their interplay is unknown. This study aims to explain the effect of muscle on MU firing contractile properties by applying deconvolution high-density surface EMG (HDEMG), torque signals same MUs followed at different lengths during voluntary contractions.Fourteen participants performed isometric ankle dorsiflexion 10% 20% maximal (MVC) short, optimal, long (90°, 110°, 130° angles, respectively)....
By employing ultrasound-transparent high-density EMG electrodes, we show that modulations in tibialis anterior muscle motor unit discharge rate were related to both changes fascicle length and resultant torque. These relationships permitted the quantification of relative delays between fluctuations neural drive, contraction, transfer torque via tendon during sustained isometric dorsiflexion contractions, providing information on conversion activity into force a contraction.