91,065 results match your criteria electromyogram emg


Surface Electromyography-Based Recognition, Synthesis, and Perception of Prosodic Subvocal Speech.

J Speech Lang Hear Res 2021 May 12:1-20. Epub 2021 May 12.

Delsys/Altec, Inc., Natick, MA.

Purpose This study aimed to evaluate a novel communication system designed to translate surface electromyographic (sEMG) signals from articulatory muscles into speech using a personalized, digital voice. The system was evaluated for word recognition, prosodic classification, and listener perception of synthesized speech. Method sEMG signals were recorded from the face and neck as speakers with ( = 4) and without ( = 4) laryngectomy subvocally recited (silently mouthed) a speech corpus comprising 750 phrases (150 phrases with variable phrase-level stress). Read More

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MRCP as a Biomarker of Motor Action with Varying Degree of Central and Peripheral Contribution as Defined by Ultrasound Imaging.

J Neurophysiol 2021 May 12. Epub 2021 May 12.

Biomedical Engineering, University of Glasgow, United Kingdomgrid.8756.c.

Introduction: Motor imagination is an alternative rehabilitation strategy for people who cannot execute real movements. However it is still a matter of debate to which degree it involves activation of deeper muscle structures, which cannot be detected by surface electromyography (SEMG).

Methods: Eighteen able bodied participants performed cue based isometric ankle plantar flexion (active movement) followed by active relaxation under four conditions: executed movements with two levels of muscle contraction (fully executed and attempted movements, EM and AM) and motor imagination with and without detectable muscle twitches (IT and I). Read More

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Brief hypoxia in late gestation sheep causes prolonged disruption of fetal electrographic, breathing behaviours and can result in early labour.

J Physiol 2021 May 11. Epub 2021 May 11.

School of Health and Biomedical Sciences, RMIT University, Melbourne, VIC, Australia.

Key Points: Brief episodes of severe fetal hypoxia can arise in late gestation due to interruption of normal umbilical blood flow Systemic parameters and blood chemistry indicate complete recovery within 1-2 hours, but the long-term effects on fetal brain functions are unknown Fetal sheep were subjected to umbilical cord occlusion (UCO) for 10 mins at 131 days gestation, and then monitored intensively until onset of labour or delivery (<145 days gestation) Normal patterns of fetal behaviour, including breathing movements, episodes of high and low voltage electorcortical activity, eye movements, and postural (neck) muscle activity were disrupted for 3-10 days after the UCO Preterm labour and delivery occurred in a significant number of the pregnancies after UCO, compared to the control (sham-UCO) cohort.

Abstract: Complications arising from antepartum events such as impaired umbilical blood flow can cause significant fetal hypoxia. These complications can be unpredictable, difficult to detect, and thus we lack a detailed understanding of the (patho)physiological changes that occur between the antenatal in utero event and birth. Read More

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Active triggering control of pneumatic rehabilitation gloves based on surface electromyography sensors.

PeerJ Comput Sci 2021 19;7:e448. Epub 2021 Apr 19.

Robotics and Mechatronics Department, Institute of Solid Mechanics of the Romanian Academy, Bucharest, Bucharest, Romania.

The portable and inexpensive hand rehabilitation robot has become a practical rehabilitation device for patients with hand dysfunction. A pneumatic rehabilitation glove with an active trigger control system is proposed, which is based on surface electromyography (sEMG) signals. It can trigger the hand movement based on the patient's hand movement trend, which may improve the enthusiasm and efficiency of patient training. Read More

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Vaccination as a possible trigger for immune-mediated necrotising myopathy.

BMJ Case Rep 2021 May 11;14(5). Epub 2021 May 11.

Laboratory of Neuromuscular Disease, Department of Neurosciences, Centro Universitário FMABC, Santo Andre, Brazil

Immune-mediated necrotising myopathy is a rare autoimmune myopathy characterised by severe progressive muscle weakness, elevated levels of creatine kinase (CK), and necrosis with minimal inflammatory cell infiltration on muscle biopsy. We report a case of a previously healthy 42-year-old woman who presented with progressive muscle weakness 2 weeks after immunisation for yellow fever, tetanus/diphtheria and hepatitis B. Her symptoms started from the lower limbs and progressed to the upper limbs and cervical region associated with dysphagia, making her wheelchair bound. Read More

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Understanding regional activation of thoraco-lumbar muscles in chronic low back pain and its relationship to clinically relevant domains.

BMC Musculoskelet Disord 2021 May 11;22(1):432. Epub 2021 May 11.

Centre of Precision Rehabilitation for Spinal Pain, School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom.

Background: Altered regional activation of the lumbar extensors has been previously observed in individuals with low back pain (LBP) performing high-effort and fatiguing tasks. It is currently unknown whether similar alterations can be observed during low-effort functional tasks. Similarly, previous studies did not investigate whether side differences in regional activation are present in individuals with LBP. Read More

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Voluntary and magnetically evoked muscle contraction protocol in males with Duchenne muscular dystrophy: safety, feasibility, reliability, and validity.

Muscle Nerve 2021 May 11. Epub 2021 May 11.

Division of Rehabilitation Science, Department of Rehabilitation Medicine, Medical School-University of Minnesota, Minneapolis, MN.

Introduction: Clinical trials addressing treatments for Duchenne muscular dystrophy (DMD) require reliable and valid measurement of muscle contractile function across all disease severity levels. This work aimed to evaluate a protocol combining voluntary and evoked contractions to measure strength and excitability of wrist extensor muscles, for safety, feasibility, reliability, and discriminant validity between males with DMD and controls.

Methods: Wrist extensor muscle strength and excitability were assessed in males with DMD (N=10; mean 15. Read More

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Continuous, integrated sensors for predicting fatigue during non-repetitive work: demonstration of technique in the operating room.

Ergonomics 2021 May 11:1-14. Epub 2021 May 11.

School of Industrial Engineering, Purdue University, West Lafayette, IN, USA.

Surface electromyography (sEMG) can monitor muscle activity and potentially predict fatigue in the workplace. However, objectively measuring fatigue is challenging in complex work with unpredictable work cycles where sEMG may be influenced by the dynamically changing posture demands. This study proposes a multi-modal approach integrating sEMG with motion sensors and demonstrates the approach in the live surgical work environment. Read More

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Power-assisted Pedicle Screw Technique Protects Against Risk of Surgeon Overuse Injury: A Comparative Electromyography Study of the Neck and Upper Extremity Muscle Groups in a Simulated Surgical Environment.

Spine (Phila Pa 1976) 2021 May 10. Epub 2021 May 10.

Zimmer Biomet Spine, Westminster, CO Hospital for Special Surgery, New York, NY Children's Hospital Los Angeles, Los Angeles, CA.

Study Design: Cadaveric.

Objective: The aim of this study was to quantify the amplitude and duration of surgeons' muscle exertion from pedicle cannulation to screw placement using both manual and power-assisted tools in a simulated surgical environment using surface electromyography (EMG).

Summary Of Background Data: A survey of Scoliosis Research Society members reported rates of neck pain, rotator cuff disease, lateral epicondylitis, and cervical radiculopathy at 3×, 5×, 10×, and 100× greater than the general population. Read More

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Investigating the effect of a passive trunk exoskeleton on local discomfort, perceived effort and spatial distribution of back muscles activity.

Ergonomics 2021 May 10:1-23. Epub 2021 May 10.

Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, 10123 Torino, Italy - ICxT Innovation Center, University of Torino.

This study aimed at determining the effect of a passive exoskeleton on local perceived discomfort, perceived effort and low back muscles' activity. Thirteen volunteers performed two simulated working tasks with and without the exoskeleton. In the static task, the exoskeleton decreased the lumbar perceived discomfort, the perceived effort and the level of low back muscles' activity (∼10%) while increasing discomfort in the chest and feet. Read More

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Time-dependent progression of neurogenic lower urinary tract dysfunction after spinal cord injury in the mouse model.

Am J Physiol Renal Physiol 2021 May 10. Epub 2021 May 10.

Department of Urology, University of Pittsburgh, United Statesgrid.21925.3d.

This study evaluated the time-course changes in bladder and external urinary sphincter (EUS) activity as well as the expression of mechanosensitive channels in lumbosacral dorsal root ganglia (DRG) after spinal cord injury (SCI). Female C57BL/6N mice in the SCI group underwent transection of the Th8/9 spinal cord. Spinal intact mice and SCI mice at 2, 4 and 6 weeks post SCI were evaluated by single-filling cystometry and EUS-electromyography (EMG). Read More

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Surface Electromyography (sEMG) Activity of Masticatory Muscle (Masseter and Temporalis) with Three Different Types of Orthodontic Bracket.

Biomed Res Int 2021 21;2021:6642254. Epub 2021 Apr 21.

Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.

Objective: This pre-post study is aimed at determining the effects of masticatory muscle activity (masseter and temporalis) measured via sEMG between conventional, self-ligating, and ceramic bracket after six months of orthodontic treatment.

Methods: A total of eighteen (18) malocclusion patients were identified. Malocclusion patients were subdivided into 3 groups based on the bracket selection (conventional, self-ligating, and ceramic bracket) with 6 patients for each group. Read More

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Geographical Latitude Remains as an Important Factor for the Prevalence of Some Myositis Autoantibodies: A Systematic Review.

Front Immunol 2021 22;12:672008. Epub 2021 Apr 22.

Centro Universitario de Ciencias de la Salud, Instituto de Investigación en Reumatología y del Sistema Músculo-Esquelético (IIRSME), Universidad de Guadalajara, Guadalajara, Mexico.

The idiopathic inflammatory myopathies (IIM) are characterized by muscular weakness, cutaneous manifestations, muscle damage revealed by increase of muscular enzymes, muscle biopsy, electromyography and changes on magnetic resonance imaging. However, the hallmark of these IIM, is the development of myositis specific antibodies (MSA) or myositis associated antibodies (MAA). The theories about their presence in the serum of IIM is not known. Read More

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A study of uterine inertia on the spontaneous of labor using uterine electromyography.

Taiwan J Obstet Gynecol 2021 May;60(3):449-453

Department of Obstetrics, Preterm Birth Prevention and Treatment Research Unit, Guangzhou Women & Children's Medical Center, Guangzhou Medical University, Guangzhou, China. Electronic address:

Objective: The purpose of this study is to analyze uterine electromyography burst patterns in patients with spontaneous labor and patients with uterine inertia.

Materials And Methods: Uterine electromyography was recorded using 4 silver/silver chloride electrodes placed periumbilical. Thirty women in the spontaneous labor were enrolled. Read More

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Comparison of supraclavicular nerve injuries after clavicle mid-shaft surgery via minimally invasive plate osteosynthesis versus open reduction and internal fixation.

Arch Orthop Trauma Surg 2021 May 9. Epub 2021 May 9.

Department of Orthopaedic Surgery, Shoulder and Elbow Clinic, College of Medicine, Kyung Hee University Hospital At Gangdong, Seoul, Republic of Korea.

Introduction: Only a few previous studies have evaluated the factors related to supraclavicular nerve (SCN) injury after clavicle mid-shaft fracture surgery. We analyzed the frequency and risk factors for SCN injury after clavicle mid-shaft fracture surgery via open reduction and internal fixation (ORIF) versus minimally invasive plate osteosynthesis (MIPO) MATERIALS AND METHODS: We retrospectively reviewed the cases from 59 patients who had undergone surgery for clavicle mid-shaft fractures between January 2018 and April 2019. Twenty-nine patients had undergone ORIF and 30 had undergone MIPO. Read More

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The association between knee joint muscle activation and knee joint moment patterns during walking in moderate medial compartment knee osteoarthritis: implications for secondary prevention.

Arch Phys Med Rehabil 2021 May 6. Epub 2021 May 6.

School of Biomedical Engineering, Dalhousie University, 5981 University Ave, Halifax, NS B3H 1W2, Canada; School of Physiotherapy, Dalhousie University, 5869 University Ave, Halifax, NS B3H 4R2, Canada; Affiliated Scientist Nova Scotia Health Authority, Department of Surgery, Halifax, NS B3H 3A7, Canada. Electronic address:

Objective: Determine associations between knee moment features linked to osteoarthritis (OA) progression, gait muscle activation patterns, and strength.

Design: Cross-sectional secondary analysis.

Setting: Gait laboratory. Read More

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The relationship between tendency to attend to detail, sensory sensitivity, and affective response to food cues - A registered report.

Int J Psychophysiol 2021 May 6. Epub 2021 May 6.

Abertay University, Dundee, Scotland, United Kingdom of Great Britain and Northern Ireland.

Understanding the underlying drivers of food choice remains a challenge and has highlighted the need for measures that capture data over and above that offered by self-reporting tools. Consequently, a growing body of research has set out to interpret facial responses to food cues to offer a greater insight into the emotional responses that may drive food acceptance. However, interpreting facial responses is challenging, as there are numerous factors that may influence affective response to foods, including expectation, context, and individual differences. Read More

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Follistatin-induced muscle hypertrophy in aged mice improves neuromuscular junction innervation and function.

Neurobiol Aging 2021 Mar 12;104:32-41. Epub 2021 Mar 12.

Department of Neurology, Neuromuscular Division, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Physical Medicine and Rehabilitation, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, OH, USA. Electronic address:

Sarcopenia, or age-related loss of muscle mass and strength, is an important contributor to loss of physical function in older adults. The pathogenesis of sarcopenia is likely multifactorial, but recently the role of neurological degeneration, such as motor unit loss, has received increased attention. Here, we investigated the longitudinal effects of muscle hypertrophy (via overexpression of human follistatin, a myostatin antagonist) on neuromuscular integrity in C57BL/6J mice between the ages of 24 and 27 months. Read More

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Differentiation between single fiber potentials from one muscle fiber or contaminated by other fibers using discriminating function.

Neurophysiol Clin 2021 May 4. Epub 2021 May 4.

Department of Neurology, Medical University of Warsaw, Banacha 1A Str., 02-097 Warsaw, Poland.

Objectives: The aim was to improve the identification of potentials recorded using single fiber electromyography (SFEMG) contaminated by potentials from other muscle fibers, which might affect measured jitter value, by defining more selective criteria of single fiber potential (SFP) discrimination. We were looking for solutions suitable for automatization.

Methods: Standard parameters characterizing SFP and their combinations were analyzed to define an analytical discriminating function able to verify if potentials recorded using SFEMG are due to single fiber or due to two (or more) fibers. Read More

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Mechanisms of postural control in older adults based on surface electromyography data.

Hum Mov Sci 2021 May 4;78:102803. Epub 2021 May 4.

Department of Physical Therapy, School of Rehabilitation, Tokyo Kasei University, Inariyama2-15-1, Sayama 350-1398, Japan. Electronic address:

Objectives: The present study aimed to clarify the mechanisms of postural control during standing in older adults and document the mechanisms of age-related motor control based on changes in muscle activities.

Methods: A total of 26 healthy male adults (older adult group, ≥65-78 years: n = 16; younger adult group, 20-23 years: n = 10) participated in this study. Ground reaction force and kinematic data of the lower limbs (hip, knee, and ankle), and electromyographic data from 6 postural muscles on the right side were recorded and quantified for each motor phase during rapid voluntary center of pressure (COP) shift. Read More

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Vocal Fold Injection Material Does Not Preclude Interpretation of Laryngeal Electromyography.

Muscle Nerve 2021 May 7. Epub 2021 May 7.

University of Pittsburgh Voice Center, Department of Otolaryngology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.

Title: Vocal Fold Injection Material Does Not Preclude Interpretation of Laryngeal Electromyography INTRODUCTION/AIMS: Temporary vocal fold injection (VFI) is a common treatment for acute and subacute vocal fold paralysis (VFP). Laryngeal electromyography (LEMG) is useful for diagnosing neurogenic causes of VFP. This study evaluated whether the presence of VFI material prevents interpretation of LEMG in patients with acute and subacute VFP. Read More

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Time-series changes in intramuscular coherence associated with split-belt treadmill adaptation in humans.

Exp Brain Res 2021 May 7. Epub 2021 May 7.

Faculty of Health and Sports Science, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, 610-0394, Japan.

Humans can flexibly modify their walking patterns. A split-belt treadmill has been widely used to study locomotor adaptation. Although previous studies have examined in detail the time-series changes in the spatiotemporal characteristics of walking during and after split-belt walking, it is not clear how intramuscular coherence changes during and after split-belt walking. Read More

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First-time anterior cruciate ligament injury in adolescent female elite athletes: a prospective cohort study to identify modifiable risk factors.

Knee Surg Sports Traumatol Arthrosc 2021 May 7. Epub 2021 May 7.

Human Movement Analysis Laboratory, Department of Orthopedic Surgery, Copenhagen University Hospital, Amager-Hvidovre, Hvidovre, Denmark.

Purpose: To identify modifiable biomechanical and neuromuscular anterior cruciate ligament (ACL) injury risk factors for first-time ACL injury in adolescent female elite football and team handball players.

Methods: Adolescent female elite football and handball players with no previous ACL injury participated in the present study. At baseline, players were tested during side-cutting manoeuvres performed in a 3-dimensional motion analysis laboratory with concomitant electromyography (EMG) measurements. Read More

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Diagnostic approach to faecal incontinence: What test and when to perform?

World J Gastroenterol 2021 Apr;27(15):1553-1562

Gastroenterology and Endoscopy Unit, The Nazareth Hospital, EMMS, Nazareth 464000, Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel.

Faecal incontinence (FI) is a debilitating common end result of several diseases affecting the quality of life and leading to patient disability, morbidity, and increased societal burden. Given the various causes of FI, it is important to assess and identify the underlying pathomechanisms. Several investigatory tools are available including high-resolution anorectal manometry, transrectal ultrasound, magnetic resonance imaging, and electromyography. Read More

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Effect of transcranial direct current stimulation on the psychomotor, cognitive, and motor performances of power athletes.

Sci Rep 2021 May 6;11(1):9731. Epub 2021 May 6.

Service de Psychiatrie de L'Adulte, Centre Hospitalier Universitaire de Besançon, 25030, Besançon Cedex, France.

In sports science, transcranial direct current stimulation (tDCS) has many unknown effects on neuromuscular, psychomotor and cognitive aspects. Particularly, its impact on power performances remains poorly investigated. Eighteen healthy young males, all trained in a jumping sport (parkour) performed three experimental sessions: anodal tDCS applied either on the left dorsolateral prefrontal cortex (dlPFC, cathode in supraorbital area) or on the primary motor cortex (M1, cathode on contralateral shoulder), and a placebo condition (SHAM), each applied for 20 min at 2 mA. Read More

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Prediction of motor Unified Parkinson's Disease Rating Scale scores in patients with Parkinson's disease using surface electromyography.

Clin Neurophysiol 2021 Mar 13. Epub 2021 Mar 13.

Klinik für Neurologie, Universitätsklinikum Gießen und Marburg, Standort Marburg, Baldingerstr., 35041 Marburg, Germany. Electronic address:

Objective: Parkinson's disease (PD) is a chronic neurodegenerative disorder with increasing prevalence in the elderly. Especially patients with advanced PD often require complex medication regimens due to fluctuations, that is abrupt transitions from ON to OFF or vice versa. Current gold standard to quantify PD-patients' motor symptoms is the assessment of the Unified Parkinson's Disease Rating Scale (UPDRS), which, however, is cumbersome and may depend upon investigators. Read More

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Patterns of whole-body muscle activations following vertical perturbations during standing and walking.

J Neuroeng Rehabil 2021 May 6;18(1):75. Epub 2021 May 6.

Center of Advanced Technologies in Rehabilitation, Sheba Medical Center, Ramat Gan, Israel.

Background: Falls commonly occur due to losses of balance associated with vertical body movements (e.g. reacting to uneven ground, street curbs). Read More

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Stretchable gold nanowire-based cuff electrodes for low-voltage peripheral nerve stimulation.

J Neural Eng 2021 May 6. Epub 2021 May 6.

Department of Science and Technology, Linkopings universitet, Linköping University, Campus Norrköping, ITN, Sandg. 31, Norrköping, 581 83, SWEDEN.

Objective: Electrical stimulation of the peripheral nervous system (PNS) can treat various diseases and disorders, including the healing process after nerve injury. A major challenge when designing electrodes for PNS stimulation is the mechanical mismatch between the nerve and the device, which can lead to non-conformal contact, tissue damage and inefficient stimulation due to current leakage. Soft and stretchable cuff electrodes promise to tackle these challenges but often have limited performance and rely on unconventional materials. Read More

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NEURAL CONTROL OF MATCHED MOTOR UNITS DURING MUSCLE SHORTENING AND LENGTHENING AT INCREASING VELOCITIES.

J Appl Physiol (1985) 2021 May 6. Epub 2021 May 6.

Department of Clinical and Experimental Sciences, University of Brescia, Italy.

Modulation of movement velocity is necessary during daily life tasks, work, and sports activities. However, assessing motor unit behavior during muscle shortening and lengthening at different velocities is challenging. High-density surface electromyography (HD-sEMG) is an established method to identify and track motor unit behavior in isometric contractions. Read More

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