On Sun, 11 Apr 1999 21:03:17 +0200, Wolfgang Schwarz
<wschwarz at zedat.fu-berlin.de> wrote:
>There are gadgets that claim to cause "Brainwave synchronisation"
>(e.g. the once famous "Brain Machine" or even the sample editor "Cool
>Edit"). That should lead to trance states or something like that
>(never works in my case though). Is that just nonsense then, or what
>are these gamma- and thetawaves they allegedly induce?
"Gamma and theta waves" describe states which are easily recognisable
by their waveform on their EEG. These states are occur in sleep.
I've never heard of those brain synchronisation things.