Intensity matters: Therapist-dependent dose of spinal transcutaneous electrical nerve stimulation

Diego Serrano-Muñoz, Julio Gómez-Soriano, Elisabeth Bravo-Esteban, María Vázquez-Fariñas, Julian Taylor and Juan Avendaño-Coy

PLOS ONE, 2017, vol. 12, issue 12, 1-15

Abstract: The intensity used during transcutaneous electrical nerve stimulation (TENS) in both, clinical practice and research studies, is often based on subjective commands such as “strong but comfortable sensation”. There is no consensus regarding the effectiveness dose of TENS. The objective was to determine the difference in the effect of spinal TENS on soleus H-reflex modulation when applied by two therapists instructed to apply the stimulation at a “strong but comfortable” intensity. Twenty healthy volunteers divided into two groups: Therapist 1 (n = 10) and Therapist 2 (n = 10). Both therapist applied spinal TENS and sham stimulation at the T10–12 spinal level for 40min in random order to each subject, at an intensity designed to produce a “strong but comfortable” sensation. To avoid habituation, the intensity was adjusted every 2min. Soleus H-reflex was recorded before, during, and 10min after TENS by an observer blinded to the stimulus applied. Despite the instruction to apply TENS at a “strong comfortable” level, a significant difference in current density was identified: Therapist 1 (0.67mA/cm2, SD 0.54) applied more than Therapist 2 (0.53mA/cm2, SD 0.57; p

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0189734

DOI: 10.1371/journal.pone.0189734

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