Influência de parâmetros da estimulação elétrica funcional na contração concêntrica do quadríceps

Bohórquez, Ingrid Johanna Rodríguez; Souza, M.N.; Pino, Alexandre Visintainer

doi:10.4322/rbeb.2013.012

Cited by 9 publications

(8 citation statements)

References 17 publications

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“…Between rPET/rGO-1.0 electrodes (ϕ 18 mm), called electrode I, and rPET/rGO-1.0 electrodes (ϕ 10 mm), called electrode II, we observed that the electrode II and Ag/AgCl electrode have linear performance at different frequencies, with different current magnitude. According to Bohórquez et al [ 48 ], the constitution of the electrode materials, the particularities of any body, as well as the diameter of the segment to be stimulated, are essential to the impedance variations of the system. In theory, the electrode size is inversely proportional to the current density, i.e., smaller electrodes cause the current to pass through a smaller area, obtaining lower impedances, thus improving the electrode-skin sensitivity.…”

Section: Resultsmentioning

confidence: 99%

Production of rGO-Based Electrospinning Nanocomposites Incorporated in Recycled PET as an Alternative Dry Electrode

et al. 2022

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In this work, Coca-Cola® bottles were reused as a PET polymer (rPET) source to produce electrospun polymeric nanofibers. The nanofibers were electrospun from polymer solutions with different concentrations of reduced graphene oxide (rGO) incorporated for applications in somatosensory electrical stimulation. The rPET/rGO nanofiber mats were characterized by SEM, TEM, Raman, DSC, TGA, and DMA and the results showed that the incorporation of rGO in electrospun rPET fibers produced rPET/rGO composites. The rPET/rGO composites were then evaluated for possible application as dry electrodes. Moreover, with a preliminary test of numerous volunteers, the rPET/rGO dry electrode showed promising results. The rPET/rGO electrodes showed good performance and applicability to make dry electrodes, and these have applications as dry or wearable electrodes to produce electrochemical sensors.

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Section: Resultsmentioning

confidence: 99%

Production of rGO-Based Electrospinning Nanocomposites Incorporated in Recycled PET as an Alternative Dry Electrode

et al. 2022

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“…The cathode positioning was guided by the determination of the motor point on the upper lateral surface of the quadriceps muscle. The motor area of greatest muscle contraction was used to position the cathode 20,21 . During electrostimulation, patients were supine, with their knees at 30º of flexion, being encouraged to perform isometric contractions concomitantly with the electrical stimulus 12 .…”

Section: Methodsmentioning

confidence: 99%

“…During electrostimulation, patients were supine, with their knees at 30º of flexion, being encouraged to perform isometric contractions concomitantly with the electrical stimulus 12 . All sessions lasted 30 minutes, with a frequency of 50 Hertz (Hz), pulse duration of 300 microseconds, rise time of 1 second, stimulus time (ON) of 5 seconds, descent time of 1 second and time of 10 seconds of relaxation (OFF) 12,20 . Intensity was adjusted according to the patient's tolerance, with approximately 100 contractions per session.…”

Section: Methodsmentioning

confidence: 99%

Efeitos da eletroestimulação neuromuscular de quadríceps sobre a funcionalidade de idosos frágeis e pré-frágeis hospitalizados: ensaio clínico randomizado

et al. 2020

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RESUMO Este artigo teve como objetivo avaliar os efeitos da eletroestimulação neuromuscular (EENM) sobre a funcionalidade de idosos frágeis e pré-frágeis hospitalizados. Trata-se de um ensaio clínico randomizado com 17 idosos hospitalizados. Foram avaliados dados antropométricos, socioeconômicos e clínicos, seguido da escala proposta por Fried para identificação da síndrome da fragilidade. Além disso, foram avaliados a perimetria da coxa e a força de membros inferiores pelo Medical Research Council (MRC) e teste de sentar e levantar (TSL). Os pacientes foram randomizados em grupo-controle (GC; n=9), com idade de 67,7±6,9 anos e grupo intervenção (GI; n=8), com idade de 71,2±5,6 anos. Ambos os grupos receberam atendimento de fisioterapia convencional. O protocolo de EENM foi aplicado somente no grupo intervenção. Os grupos foram semelhantes quanto ao perfil sociodemográfico, antropométrico, quanto às características clínicas e quanto ao uso contínuo de medicamentos. Houve efeitos significativos da EENM quando comparados ao GC para perimetria da coxa direita (p=0,03); para o número de repetições no TSL (p=0,004) e para a força muscular do quadríceps (p=0,01), avaliados pela escala MRC. O treinamento muscular de quadríceps com a EENM foi efetivo nos idosos frágeis e pré-frágeis hospitalizados, promovendo aumento da força e do desempenho funcional.

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“…The electromyographic examination revealed a significant effect on the neuromuscular activation pattern due to the restoration of the strength of the muscle through neuromuscular facilitation and increasing the velocity of propagation of action potentials of motor units 17 that promote an increase in muscular action 18 and improves intermuscular and intramuscular coordination of agonists and antagonists 19,20 . The assessment of postural control represents a challenging task but has important implications to professionals from diverse areas such as neurology, physiotherapy, and orthopedics 21 .…”

Section: T Guwn Vu" "mentioning

confidence: 99%

Symmetric-Electromyographic Analysis in the Evaluation of Scoliosis Treatment

Strasse

Oliveira

Beraldo

et al. 2018

Rev Bras Med Esporte

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Introduction: Scoliosis is a three-dimensional deformity of the spine, characterized by a lateral shift that affects body posture. The Pilates Method (PM) promotes alterations in the biomechanics and neuromuscular activation pattern. Objective: The aim of this study was to analyze electromyography (EMG) and symmetrography (SMTG) technologies applied in the evaluation of neuromuscular and postural effects on right convex thoracolumbar scoliosis (RCTS) after applying a PM therapeutic protocol. Methods: This is an exploratory study of 5 male and female adolescents, with an average age of 14.4 years. The subjects underwent postural asymmetry assessments through SMTG and neuromuscular assessment through surface EMG of the trapezius (TRAP), erector spinae (ERE), oblique (OBLI) and rectus abdominis (RA) muscles. The electromyographic signals were processed in the temporal (EMGAmp) and spectral (EMGFmed) domains. The therapeutic protocol consisted of 24 sessions of Pilates floor exercises held twice a week with a duration of 45 minutes. Results: There was an improvement in scoliosis and asymmetric shoulders in one subject (20%) and in three other subjects with hip asymmetry. There was an improvement in one subject (33.33%), as demonstrated by SMTG. EMGAmp measurements demonstrated a significant difference between before and after (p≈0) and among the muscles (p≈0). EMGFmed measurements demonstrated that there was only a difference between before and after (p≈0). It was verified that the most noteworthy muscles in terms of EMGAmp were TRAP and ERE, emphasizing the existence of an increase in the mean EMGAmp for ERE. Muscle behavior for measurements in EMGFmed demonstrated a higher mean increase for RA and OBLI muscles. Conclusion: It is concluded that the EMG and SMTG technologies are important tests for monitoring the progress of scoliosis and in treatment decisions. Level of Evidence III; Diagnostic Studies - Investigating diagnostic tests.

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Influência de parâmetros da estimulação elétrica funcional na contração concêntrica do quadríceps

Cited by 9 publications

References 17 publications

Production of rGO-Based Electrospinning Nanocomposites Incorporated in Recycled PET as an Alternative Dry Electrode

Production of rGO-Based Electrospinning Nanocomposites Incorporated in Recycled PET as an Alternative Dry Electrode

Efeitos da eletroestimulação neuromuscular de quadríceps sobre a funcionalidade de idosos frágeis e pré-frágeis hospitalizados: ensaio clínico randomizado

Symmetric-Electromyographic Analysis in the Evaluation of Scoliosis Treatment

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