Some people have asked for details about a beautiful poster on the wall at Springfield Neurofeedback. The poster shows gamma rays, X-rays, visible light, radio waves and all known ranges of the electromagnetic spectrum.
The poster includes brainwaves!
Anthony Tekatch,the author of the poster, gave us permission to share a link to his website. Anthony also mentioned that there is a free full pdf version of the poster at the link.
Here is the link:
Scroll to the bottom of the page to see the the free full pdf version of the poster.