Why would anyone want to train the cortex at infra-slow frequencies?
[ Top ] A: Generally, if one were using a single channel referential montage it is unlikely that anyone would train at delta or lower frequencies. Delta waves are associated with sleep, coma, brain injury, developmental insult, etc. However, in bipolar training the operator is, in general, training the brain to be more different between two sites at a particular frequency, regardless of frequency. Siegfried Othmer has provided a statistical analysis [ 1 ] that shows that rewarding a bipolar low frequency “difference” amplitude, it is more likely that the brain has created the increased reward amplitude by shifting phases between sites rather than by increasing the amplitude at one of the sites. As will be described below, the ability to phase shift at infra-slow frequencies is an important component of cognitive flexibility and sensory discrimination. When doing bipolar training at low frequencies it is often observed that, as the trainer raises and lowers the reward frequency, the cli
