Vertigo

Although there are anecdotal reports of effects on balance and gait from training below O1 and O2–about level with the inion, that’s all I’ve ever seen.  Theoretically, since the Cerebellum, which is the area you are speaking of, has no pyramidal cells, it should not produce an EEG signal, and thus feedback shouldn’t “catch its attention.”

Vertigo can be related to many things and can come from lots of different problem areas. Assuming it’s not an inner ear thing, it could be related to autonomic function (is blood pressure very high or very low?).

Training a one-channel bipolar montage between electrodes placed below O1 and O2, increase SMR and decrease theta differentials has been reported by some on this list to have positive results.