Transcutaneous electrical nerve stimulation
(a)
uses a current up to 90mA
(b)
uses a frequency of 0–100 Hz
(c)
pulse duration is 0.1–0.5 ms
(d)
at low frequency acts by closing the gate
(e)
at high frequency acts by releasing endorphin
(a) false (b)
true (c)
true (d)
false (e)
false
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