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Abstract(s)
A estimulação elétrica é utilizada regularmente por fisioterapeutas, sendo usualmente indicada
para o alívio da dor. A estimulação elétrica nervosa transcutânea é uma terapêutica não invasiva,
que através de um estimulador externo, faz circular uma corrente elétrica que atravessa os
elétrodos que estão colocados na superfície da pele.
Em 1965, Melzack e Wall forneceram uma justificação fisiológica para os efeitos analgésicos da
eletroestimulação. Propuseram a teoria de controlo do portão. De acordo com esta teoria, a
ativação de fibras aferentes de grande diâmetro, fibras A-beta, provoca a ativação local de
mecanismos inibitórios no corno dorsal da medula espinhal causando a inibição pré-sináptica das
fibras aferentes nociceptivas, fibras A-delta e C, provocando um alívio da dor.
A TENS aplica uma corrente de baixa frequência quando comparada a todo o espectro de
frequências de corrente elétrica disponíveis para uso terapêutico, e pode ser classificada em
quatro modalidades: convencional, acupuntura, burst e breve-intenso.
Este estudo teve como objetivo avaliar, numa pequena amostra de indivíduos, a experiência
dolorosa que a TENS pode provocar e os seus efeitos térmicos, recorrendo a uma escala numérica
da dor e à termografia, respetivamente.
Electrical stimulation is regularly used by physical therapists and is usually indicated for pain relief. Transcutaneous electrical nerve stimulation is a non-invasive therapy in which an electrical current is emitted through an external stimulator that passes through the electrodes placed on the surface of the skin. In 1965, Melzack and Wall provided a physiological justification for the analgesic effects of electrostimulation. They proposed the gate control theory. According to this theory, the activation of large diameter afferent fibers, A-beta fibers, causes local activation of inhibitory mechanisms in the dorsal horn of the spinal cord causing presynaptic inhibition of nociceptive afferent fibers, A-delta and C fibers, causing pain relief. TENS applies a low-frequency current when compared to the entire spectrum of electrical current frequencies available for therapeutic use, and can be classified into four modalities: conventional, acupuncture, burst and brief-intensity. This study aimed to evaluate, in a small sample of individuals, the painful experience that TENS can cause and its thermal effects, using a numerical pain scale and thermography, respectively.
Electrical stimulation is regularly used by physical therapists and is usually indicated for pain relief. Transcutaneous electrical nerve stimulation is a non-invasive therapy in which an electrical current is emitted through an external stimulator that passes through the electrodes placed on the surface of the skin. In 1965, Melzack and Wall provided a physiological justification for the analgesic effects of electrostimulation. They proposed the gate control theory. According to this theory, the activation of large diameter afferent fibers, A-beta fibers, causes local activation of inhibitory mechanisms in the dorsal horn of the spinal cord causing presynaptic inhibition of nociceptive afferent fibers, A-delta and C fibers, causing pain relief. TENS applies a low-frequency current when compared to the entire spectrum of electrical current frequencies available for therapeutic use, and can be classified into four modalities: conventional, acupuncture, burst and brief-intensity. This study aimed to evaluate, in a small sample of individuals, the painful experience that TENS can cause and its thermal effects, using a numerical pain scale and thermography, respectively.
Description
Keywords
Dor Estimulação Elétrica Estimulação Elétrica Nervosa Transcutânea