ch point blockade to explain TENS (18:11). Basically, their theory concurs with gate control theory.
It is well accepted that the most effective use of TENS requires that the stimulating electrodes be placed on or around the painful area, over major nerve trunks, or over the major plexus innervating a painful extremity (18:11). In addition, anesthetized areas do not respond and stimulation must be proximal to the site of injury; distal stimulation is rarely of any value (18:11).
Since it has been shown that certain afferent fibers may signal the hyperalgesia associated with nerve injury, Campbell and Taub have suggested that this signalling function is blocked by electrical stimulation of sufficient frequency (18:11). The selective stimulation of fast-conducting A fibers carrying light touch sensation may block the slower conducting C fiber pain signals (19:67). A-delta afferent inputs at segmental levels of the spinal cord may effectively "close the gate" (7:202).
The two other possible effects that TENS can have on the peripheral nervous system include t
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