Electrical Concepts in the Surface Electromyographic Signal

Bolek, Jeffrey E.

doi:10.1007/s10484-009-9118-x

Cited by 7 publications

(5 citation statements)

References 11 publications

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“…Electromyography (EMG) biofeedback is an effective tool for exploring the limits of volitional motor control. During walking, biofeedback of the tibialis anterior or gastrocnemius can help restore normal ankle dorsiflexion or plantarflexion moments for individuals with stroke or cerebral palsy 27,28 . Humans can also gain selective control over several motor units within a single biofeedback session 29,30 , but most individuals lose this selective control during dynamic tasks 31 .…”

Section: Muscle Coordination Retraining Inspired By Musculoskeletal S...mentioning

confidence: 99%

Muscle coordination retraining inspired by musculoskeletal simulations reduces knee contact force

Uhlrich

Jackson

Seth

et al. 2022

Sci Rep

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Humans typically coordinate their muscles to meet movement objectives like minimizing energy expenditure. In the presence of pathology, new objectives gain importance, like reducing loading in an osteoarthritic joint, but people often do not change their muscle coordination patterns to meet these new objectives. Here we use musculoskeletal simulations to identify simple changes in coordination that can be taught using electromyographic biofeedback, achieving the therapeutic goal of reducing joint loading. Our simulations predicted that changing the relative activation of two redundant ankle plantarflexor muscles—the gastrocnemius and soleus—could reduce knee contact force during walking, but it was unclear whether humans could re-coordinate redundant muscles during a complex task like walking. Our experiments showed that after a single session of walking with biofeedback of summary measures of plantarflexor muscle activation, healthy individuals reduced the ratio of gastrocnemius-to-soleus muscle activation by 25 ± 15% (p = 0.004, paired t test, n = 10). Participants who walked with this “gastrocnemius avoidance” gait pattern reduced late-stance knee contact force by 12 ± 12% (p = 0.029, paired t test, n = 8). Simulation-informed coordination retraining could be a promising treatment for knee osteoarthritis and a powerful tool for optimizing coordination for a variety of rehabilitation and performance applications.

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Section: Muscle Coordination Retraining Inspired By Musculoskeletal S...mentioning

confidence: 99%

Muscle coordination retraining inspired by musculoskeletal simulations reduces knee contact force

Uhlrich

Jackson

Seth

et al. 2022

Sci Rep

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“…18 Surface EMG is a widely accepted and commonly used electrophysiological modality in research 19 that measures neuromuscular electrical activity deep to the electrode. 20 However, this modality has several limitations, including cross-talk from surrounding muscles, electromechanical delay, and irritation or discomfort (fine-wire EMG). 19 Electromyography is frequently used in the research setting, but few practicing clinicians have access to or the training to employ this modality in clinical practice.…”

mentioning

confidence: 99%

Ultrasonography of Gluteal and Fibularis Muscles During Exercises in Individuals With a History of Lateral Ankle Sprain

Koldenhoven

Fraser

Saliba

et al. 2019

Journal of Athletic Training

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Context Individuals with a history of lateral ankle sprains (LASs) have ankle and hip neuromuscular changes compared with those who do not have a history of LAS. Objective To compare gluteus maximus (GMax), gluteus medius (GMed), and fibularis longus and brevis muscle activation using ultrasound imaging during tabletop exercises and lateral resistance-band walking in individuals with or without a history of LAS or chronic ankle instability (CAI). Design Cross-sectional study. Patients or Other Participants Sixty-seven young adults (27 males, 40 females). Groups were healthy = 16, coper = 17, LAS = 15, CAI = 19. The number of previous sprains was 0 ± 0 in the healthy group, 1.1 ± 0.3 in the coper group, 2.9 ± 2.4 in the LAS group, and 5.3 ± 5.9 in the CAI group. Main Outcome Measure(s) Ultrasound imaging measures of fibularis cross-sectional area (CSA) were collected during nonresisted and resisted ankle eversion. Gluteal muscle thicknesses were imaged during nonresisted and resisted side-lying abduction and during lateral resistance-band walking exercises (lower leg and forefoot band placement). Separate 4 × 2 repeated-measures analyses of variance and post hoc Fisher least significant difference tests were used to assess activation across groups and resistance conditions. Results All groups demonstrated 3.2% to 4.1% increased fibularis CSA during resisted eversion compared with nonresisted. During side-lying abduction, the LAS and CAI groups displayed increased GMax thickness (6.4% and 7.2%, respectively), and all but the CAI group (−0.4%) increased GMed thickness (5.3%–11.8%) with added resistance in hip abduction. During band walking, the healthy and LAS groups showed increased GMax thickness (4.8% and 8.1%, respectively), and all groups had increased GMed thickness (3.0%–5.8%) in forefoot position compared with the lower leg position. Although the values were not different, copers exhibited the greatest amount of GMed thickness during band-walking activities (copers = 23%–26%, healthy = 17%–23%, LAS = 11%–15%, CAI = 15%–19%). Conclusions All groups had increased fibularis CSA with resisted eversion. In side-lying hip abduction, individuals with CAI had greater GMax thickness than GMed thickness. Ultrasound imaging of fibularis CSA and gluteal muscle thickness may be clinically useful in assessing and treating patients with LAS or CAI.

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“…For instance, adding EMG-BF to conventional exercise programs significantly reduced the usage time of walking aids in patients who underwent surgery for arthroscopic partial meniscectomy, compared to those who received only conventional exercise training [14]. Particularly, in children with cerebral palsy, many positive outcomes have been reported [15][16][17]. For example, EMG-BF targeting the tibialis anterior during walking led to improvements in symmetry and greater ankle power for push-off in children with cerebral palsy [15].…”

Section: Emg-bf For Improving Walking Abilitiesmentioning

confidence: 99%

“…For example, EMG-BF targeting the tibialis anterior during walking led to improvements in symmetry and greater ankle power for push-off in children with cerebral palsy [15]. Furthermore, when children with cerebral palsy used EMG-BF, it resulted in improved foot clearance during the swing phase of walking and the acquisition of new abilities for contraction and relaxation of the anterior tibialis muscle [16]. Thus, opinions on whether EMG-BF improves walking abilities are divided.…”

Section: Emg-bf For Improving Walking Abilitiesmentioning

confidence: 99%

Electromyography biofeedback to improve dynamic motion

Kibushi¹

2023

Recent Advances in Alternative Medicine

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Electromyography biofeedback (EMG-BF) has been used to train the muscle activation or relaxation but the application of EMG-BF to improve dynamic motion (e.g. walking or pedaling) is open to investigation. This chapter deals with an introduction to our previous work and the latest research we are working on. In our previous study, we investigated whether auditory EMG-BF is effective in improving muscle co-contraction. Unfortunately, we found that individual EMG-BF does not immediately improve muscle co-contraction during pedaling. To improve the muscle co-contraction by EMG-BF, it may be necessary to convert muscle activation into a muscle co-contraction. In our latest study, we investigated whether visual EMG-BF is effective in stabilizing walking. We found that EMG-BF during normal walking partially stabilizes the center of mass acceleration. Finally, based on our research findings, I will discuss the construction of an EMG-BF system that can contribute to the improvement of dynamic movements.

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Electrical Concepts in the Surface Electromyographic Signal

Cited by 7 publications

References 11 publications

Muscle coordination retraining inspired by musculoskeletal simulations reduces knee contact force

Muscle coordination retraining inspired by musculoskeletal simulations reduces knee contact force

Ultrasonography of Gluteal and Fibularis Muscles During Exercises in Individuals With a History of Lateral Ankle Sprain

Electromyography biofeedback to improve dynamic motion

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