---
title: Bipolar Bipolar Training
description: We were recently asked for a design to do an unusual type of bipolar training on the Atlantis.  The client wanted to take one bipolar pair as one channel, and a different bipolar pair as another channel, then train the…
url: "https://brainmaster.com/kb-entry/id517/"
updated: "2025-12-03"
category: "Protocol Templates / Archive: BrainMaster 3.0 Series/Discovery and earlier Protocols Templates"
---

# Bipolar Bipolar Training

We were recently asked for a design to do an unusual type of bipolar training on the Atlantis.  The client wanted to take one bipolar pair as one channel, and a different bipolar pair as another channel, then train the difference between these channels.  For example, one channel might be Fp1-T3.  Another channel might be Fp2-T4.  Then, with these as two channels, train the difference between them, as a virtual channel.    What was wanted was to do this twice, so that it is repeated with T3-P3 and with T4-P4, creating yet another virtual channel.  Then the difference between the two virtual channels is desired, to do whole-head bipolar training.  As another variation, the sum of these two virtual channels was also desired.  This produces a unique combination of intrahemispheric and interhemispheric training.  In order to configure this on an Atlantis 4x4 and use the sum-channel mode to do the channel combinations, the following description shows how to connect the leads.  Note that all sites are still being acquired monopolar, so if a linked ear reference is used, for example, it is still possible to do 4-channel live Z-Scores along with this type of training.   Note the following algebra for one of the desired combinations:  (A - B) - (C - D) (what you want) = A - B - C + D  =  A + D - B - C  = (A + D) - (B + C)  (what the software produces)  Note how the minus signs inside the parentheses have turned into plus signs, by rearranging the terms.  Now the last arrangement, (A + D) - (B + C) is the type of equation that channel 3 becomes, when using 4-channel sum-channel mode with the Combine Option.  Only now, A is channel1, D is channel 2, B is channel 3, and C is channel 4.  One equation wanted was:

 

 ((T3 - Fp1) minus (T4 - Fp2))   MINUS  ((T3 - P3) minus (T4 - P4))  Se let A=T3-Fp1, D=T4-Fp2, B=T3-P3, and C=T4-P4.  Then you get what you wanted.  Therefore, set so: acquired channel 1 = T3-Fp1 acquired channel 2 = T3-P3 acquired channel 3 = T4-P4 acquired channel 4 = T4-Fp2  So the way to do it is connect as follows:  A1 T3 R1 Fp1 A2 T3 R2 P3 A3 T4 R3 P4 A4 T4 R4 Fp2  A similar exercise will produce the other combination you wanted:   (A - B) + (C - D) (what you want) = A - B + C - D  =  A + C - B - D  = (A + C) - (B + D)  (what the software produces)  You wanted:   ((T3 - Fp1) minus (T4 - Fp2))   PLUS  ((T3 - P3) minus (T4 - P4))   So let A=T3-Fp1  C=T4-Fp2, B=T3-P3, and D=T4-P4.  So in this case, acquired channel 1 = T3-Fp1 acquired channel 2 = T3-P3 acquired channel 3 = T4-Fp2 acquired channel 4 = T4-P4  So connect:

 

 

 A1 T3 R1 Fp1 A2 T3 R2 P3 A3 T4 R3 Fp2 A4 T4 R4 P4

 

   In both cases, you would use sum-channel mode, "combine," and train using "channel 3" as the training channel.