The electrocerebellogram.

A revisitation of EEG studies derived experimentally from the cerebellum confirms the predominance of ultrafast activities but also shows various degrees of underlying slower frequencies (from the beta down to the delta range). Earlier personal work was based upon recording from the human cerebellum (and especially from fastigial and dentate nucleus) in connection with therapeutic cerebellar electrical stimulation. These patients suffered from intractable seizures (advanced cases of Lennox-Gastaut syndrome). Naturally, our recording technique in 1974 excluded the ultrafast range above 80/sec but failed to show activities in the upper beta range. In these cases, the severity of the seizure disorder caused structural impairment and ictal activity invaded the cerebellum. The electrocerebellogram is still insufficiently understood. An attempt at an analysis of known facts is being made. Further research in this field is needed.