RESUMO: O objetivo deste trabalho foi comparar a estimulação elétrica nervosa transcutânea (TENS) e a corrente de alta voltagem (AV ) em indivíduos saudáveis. Para concretizar tal análise, 20 voluntários realizaram as duas modalidades de eletroestimulação de forma cruzada. A nocicepção foi avaliada por meio de estímulos pressóricos e térmicos no membro superior esquerdo, foi aplicada aeletroanalgesia por 20 minutos, sobre a articulação do cotovelo. Os parâmetros da TENS foram: duração de fase de 200 μs e frequência de 100 Hz. Para AV: 50 μse 100 Hz, polo positivo sobre a região do nervo mediano e negativo sobre o ulnar. Os resultados do estudo não mostraram diferenças significativas para limiar de dor e intensidade da dor ao frio. A AV apresentou-se mais agradável e com maior número de acomodações. Desse modo, é possível constatar que os parâmetros utilizados não foram eficazes para alterar a dor em indivíduos saudáveis e a Alta Voltagem teve maior agradabilidade, porém acomodou mais vezes. PALAVRAS-CHAVE: Estimulação elétrica nervosa transcutânea;Medição da dor; Temperatura baixa.ABSTRACT: Current analysis compares transcutaneous electrical nerve stimulation and high voltage (HV ) on healthy subjects. Twenty volunteers experienced the two electro-stimulating modalities. Nociception was evaluated by pressure and thermal stimuli on the upper left limb and electro-analgesia was applied for 20 minutes on the elbow articulation. TENS parameters comprised: phase of 200 μs and frequency of 100 Hz. In the case of HV: 50 μs and 100 Hz, positive pole on the median nerve region and negative pole on the ulnar region. There were no significant paralimiar differences of pain and pain intensity to the cold. HV was more agreeable and with a great number of adaptations. Parameters employed were not efficacious to change pain in healthy subjects; HV had a greater agreeability albeit accommodated several times.KEY WORDS: Nerve transcutaneous electrical stimulation; Low temperature; Measurement of pain. INTRODUÇÃOA dor pode ser definida como uma experiência subjetiva, sensorial e emocional desagradável, associada a uma lesão tecidual real

BACKGROUND AND OBJECTIVES: There is a data gap regarding cold pain and pressure pain in healthy young individuals. The present study aimed to compare cold pain threshold and intensity and pressure threshold in young men and women with different fat percentages. METHODS: The study included 30 men and 42 women aged between 18 and 25 years, divided into two groups: normalbody mass index ≤24.9 and overweight-≥25. Fat percentage was estimated by tetrapolar bioimpedance, pain-pressure threshold by pressure algometer, cold pain threshold was timed, and the intensity measured by the visual analog scale. RESULTS: The intensity of pain caused by cold showed no significant difference between groups, as well as the cold pain threshold and the initial and final pain threshold. The same behavior happened within the men and women groups. When comparing the difference between genders, pressure pain and cold pain thresholds had significant differences. Pain intensity did not differ between genders. CONCLUSION: Fat percentage did not affect the response time of cold pain and pressure pain thresholds and pain intensity in young adults. When considering gender, although the cold pain threshold in men was higher than in women, pain intensity was similar.

BACKGROUND AND OBJECTIVES:Although used in the therapeutic field, there is a shortage of studies that evaluate combined therapy or the association of electrical currents with therapeutic ultrasound, the present study aimed to compare the two forms in healthy individuals, analyzing the pain, number of accommodations and current intensity. METHODS: Thirty healthy volunteers took turns for three weeks in three groups. Nociception was evaluated by means of pressure and thermal stimuli in the lumbar spine and respective dermatomes. Then, the volunteer's dominant foot was submerged in cold water to evaluate the threshold of pain and its intensity. Shortly after, electroanalgesia (combined therapy, only current association with ultrasound, or placebo) was applied for 15 minutes. The application of the bipolar interferential current used a frequency of 4kHz, and amplitude modulation frequency of 100Hz, with one electrode on L3 and the other on S1. When combined therapy was used, the ultrasound head (1MHz) played the role of the electrode positioned over the L5-S1 region, in continuous form, at a dose of 0.4W/cm 2 . The intensity of the initial and final current was evaluated, as well as the number of accommodations. RESULTS: There was no significant difference between the pain thresholds of pressure and cold, but the combined therapy required more current intensity despite having a smaller number of accommodations. CONCLUSION: None of the therapies produced a difference in pain thresholds, but the combined therapy had fewer accommodations. Keywords: Analgesia, Pain measurement, Physical therapy modalities, Transcutaneous electric nerve stimulation, Ultrasonic therapy. RESUMO JUSTIFICATIVA E OBJETIVOS: Apesar de utilizada no campo terapêutico, há escassez de estudos que avaliem a terapia combinada ou a associação de correntes elétricas ao ultrassom terapêutico. O objetivo deste estudo foi comparar as duas formas em indivíduos saudáveis, analisando o limiar de dor ao frio e à pressão, número de acomodações e intensidade da corrente. MÉTODOS: Trinta voluntários saudáveis revezaram em três grupos de forma cruzada durante três semanas. A nocicepção foi avaliada por meio de estímulos pressóricos e térmicos na coluna lombar e dermátomos. Em seguida, o voluntário teve seu pé submerso em água fria, e avaliado o limiar e a intensidade da dor. Logo após foi aplicado a eletroanalgesia (terapia combinada, apenas associação da corrente com ultrassom, ou placebo), por 15 minutos. Para corrente interferencial bipolar, foram utilizados frequência de 4kHz e frequência modulada pela amplitude de 100Hz, com um eletrodo sobre L3 e o outro sobre S1. Quando se utilizou a terapia combinada, o cabeçote do ultrassom (1MHz) fez o papel do eletrodo posicionado sobre a região de L5-S1, na forma contínua, com dose de 0,4W/cm 2 Comparison of combined therapy with ultrasound-associated interferential current in healthy subjects

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