I have to admit that I have never heard of anything like this. I did use the TENS unit with PT for my back and I had one at home. They also used the heating pad several times, but no electrodes or anything like that.
Come to think of it, there was a machine in the treatment room that looked rather like an audio mixer for sound control. I wonder if it was used for something like what you are describing. You may want to try to look it up online.
Best to you!
DDD, CHRONIC PAIN SYNDROME, TLIF L5-S1 2009 (failed), FIBRO, MINEYER'S (SP?), VERTIGO, MIGRAINES, GERD, SLEEP DISORDER, NISSEN FUNDOPLICATION (failed), DEPRESSION, EXTREME ANXIETY DISORDER, OCPD, PTSD, CHRONIC MUSCLE SPASMS, HUMAN GROWTH HORMONE DEFICIENCY, VITAMIN D DEFICIENCY, CARPLE TUNNEL SYNDROME, EXTREME IDIOPATHIC HYPOGLYCEMIA FROM AGE 12