24
The interferential electrical signal is created by the interaction of the signals from all
four pads (i.e. between the pads of each channel). So, the pads need to apply in
positions so that the signals from each channel cross over the point to be treated.
The two channels add and subtract to create an interference pattern. In theory this
looks like the cross shaped diagram. In real tissue the pattern is difficult to predict and
you may need to adjust the pad positions until you can sense the stimulation in the
correct area.
The diagrams on the following pages shows how pads can be placed in various body
areas.
They all follow the same principles.