There are a couple different kinds of helmets one can wear to stimulate the brain.
( 1. ) The transcutaneous nerve stim is powerful and I will talk more of it later.
( 2. ) The other is a so-called "God helmet" . A scientist created it and got some publicity re: his theories and results. There has been trouble repeating his results.
http://en.wikipedia.org/wiki/God_helmet
Another helmet was created that was perhaps inspired by this...
http://technoccult.net/archives/2011...n-for-insight/
http://www.plosone.org/article/info:...l.pone.0016655
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