This is probably old hat for many, but it's new to me and perhaps others.

There are 5 types of brain wave - beta, alpha, theta, delta and the recently discovered gamma. Beta waves are for every day waking activity. Alpha waves are particularly interesting because they arise at times of deep relaxation and seem to have a key role in linking to what's going on deeper. Theta waves are the repository of unconscious thoughts, long-term memory and emotion. Delta waves are the unconscious mind and relate to deep intuition and empathy and apparently (in some) sixth sense. No one seems to know much about gamma yet but they may relate to something even deeper.

It can all be googled. Part of what is out there on the web are promises that creative powers such as writing poetry can be increased by alpha wave training. Poetry can be triggered or improved.

Some of my own poetry that I value most was written late at night. That is a time, when drifting off to sleep, that alpha waves are meant to get going. So, for me, it feels credible. But the idea of going for alpha wave training in order to manipulate one's own creativity feels very odd. Has anyone any experience of this? Any other views?

I've put this in Wonderland partly because I don't want to interrupt Harry's flow and partly because it does seem to have something to do with craziness. What are Moxy's brain waves like (and where is she)?

I have in the past spent time meditating, and this was interestingly close to my practice in writing poetry. From early efforts to write I found the best environment was to be alone, uninterrupted, and to sit with paper and pen and wait for my mind to suggest sounds, words, phrases, which might build up into something worth working on. Very much on the principle of "How do I know what I think till I see what I say."
Meditation seemed to sink me down into a similar mental state, but then deeper, so I would 'wake' from it in a very refreshed state. Unlke real sleep, where you wake feeling a bit drowsy.
I later read the book called 'the Wise Wound' by Penelope Shuttle and Peter Redgrove. This advocated (in one chapter) reaching creative forces in yourself by recording dreams as soon as you wake. I followed some of their suggestions and a very productive creative time did follow so maybe they were right.
I read a description of the mind and consciousness, where the mind was likened to the universe and our consciousness to a small planet like the earth circling a small star on the edge of the vastness of space. We are only conscious of a small part of what our brain is up to, or capable of, so excercises that allow us to reach out beyond our day to day awareness of the world must have an effect on the way we think.