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 not consensus regarding the effectiveness dose of TENS
Twenty healthy volunteers will divide into two groups: Therapist 1 and Therapist 2. Both therapist will apply spinal TENS and sham stimulation for 40min in random order to each subject, at an intensity to produce a "strong but comfortable sensation".
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
20
Spinal TENS stimulation over back through the electrotherapy device Myomed 932. (Enraf-Nonius, Delft, Netherlands)
Sham stimulation over back through the electrotherapy device Myomed 932. (Enraf-Nonius, Delft, Netherlands)
Juan Avendaño-Coy
Toledo, Spain
RECRUITINGBaseline Current Density
Current density (mA/cm2) is obtained by a mathematical operation which reflects the applied current intensity divided by the electrode area (45cm2)
Time frame: At the onset (0min) of the Spinal TENS session
Final Current Density
Current density (mA/cm2) is obtained by a mathematical operation which reflects the applied current intensity divided by the electrode area (45cm2)
Time frame: At the end (40min) of the Spinal TENS session
Baseline Maximal peak-to-peak soleus H-reflex
H-reflex data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: baseline at 0min
Baseline Maximal peak-to-peak soleus M wave
M wave ddata are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: baseline at 0min
Baseline Normalized H-reflex response
Normalized H-reflex response data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: baseline at 0min
During Maximal peak-to-peak soleus H-reflex
H-reflex data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: during treatment at 33min
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During Maximal peak-to-peak soleus M wave
M wave data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: during treatment at 33min
During Normalized H-reflex response
Normalized H-reflex response data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: during treatment at 33min
Post-treatment Maximal peak-to-peak soleus H-reflex
H-reflex data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: Immediately after treatment at 40 min
Post-treatment Maximal peak-to-peak soleus M wave
M wave data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: Immediately after treatment at 40 min
Post-treatment Normalized H-reflex responseMaximal peak-to-peak soleus H-reflex
Normalized H-reflex response data are obtained by electromyography activity (EMG). The EMG electrode is fixed on triceps surae. The stimulator electrode is fixed on the peroneus nerve, in the popliteal fossa.
Time frame: Immediately after treatment at 40 min