Forgive me in advance for my verbose posting in this thread!
This is a book that is difficult to read and interpret in separate chunks (a classic left brained task, I might add
). The full context is obviously much harder to grasp this way and, being so inherently multi-disciplinary, context is vital to understanding how the pieces fit in this kind of theory. I always found it much easier to understand books when reading a few chapters at a time, or in just a couple sittings, but that's just me. I think people should read at their own pace. And try and keep in mind the implications regarding how we process this info if it is indeed the case that we all have this condition.
The biochemical mechanisms are presented in later chapters. They are surprisingly straightforward at the core but we'll get into that later.
I'll elaborate a bit on sleep dep because it's one of the most ancient/universal yet misunderstood techniques there is.
To clarify, Wright isn't claiming that we don't need sleep. The point is that it seems that, once fueled by more optimal biochemistry and especially with practice (as with anything), reduction in sleep leads to the left hemisphere becoming more dysfunctional (speech slurs etc.), but along with this increased dysfunction it is inherently less capable of maintaining its normal level of hemispheric dominance, allowing more of the less accessible functions of the right hemisphere to come through into awareness. This is not an easy technique for everyone and doesn't work good for most people without a lot of preparation, and can even be dangerous without it. But it is nevertheless an extremely powerful and ancient tradition implemented around the world in some form or other, and this explains why. There is an interesting switch over point where the tiredness goes away completely and a new mode of being is experienced, but maybe more on that later.
The sleep deprivation experiment/manchester trial is interesting because a task such as balancing is not something that is going to improve as you go days on end without sleep despite how, under normal conditions, you would of course improve via repetition. This is not the norm as tiredness increases, as Colin Groves has explained, and as other experimenters of sleep deprivation (lacking the biochemical elements, of course) have experienced. Things like balance and coordination usually decrease drastically the longer one goes without sleep, so for the participants level of functionality to even stay the same would be quite interesting, but for them to get much better is shocking. This experiment is more of a sidenote though than it is the core of anything or hard evidence, and barely a glimpse at what Tony and the other participant have experienced perceptually speaking. Replication of this research would be very intriguing but the resources aren't there, and most scientists don't know what to make of it to begin with because of the lack of context.
Having experimented with it to a degree, these types of effects are intriguing but definitely not the most interesting bits about sleep deprivation - those are harder to study in a scientific setting. The perceptual effect is profound.
I stumbled onto a psychedelic sleep dep experience accidentally before reading this book. At one point, like the author, my thoughts were completely in rhyme for a period of time. It was impossible to think in any other way and was extremely bewildering. The material I'd been studying - 15 pages of complex philosophy - was accessible in a bizarre kind of ghestalting visual memory with 100% recall. The night was filled with epiphanies of all sorts and not unlike a nice dose of mushrooms for me.
It is arguably the most ancient documented technique for accessing "the gods", as described in the epic of gilgamesh: one of the most ancient texts we have... The buddha was also said to have meditated for around a week under a tree (a fig tree, no less). I've always found it odd that we neglect the fact that this is not just meditation alone, but extreme sleep deprivation. So here we have a global religion with well over 300 million followers... that all stems from an alleged sleep deprivation experience in the ancient past.
A recent example of some effects of even light sleep deprivation for me two nights ago:
When I finally did fall asleep after very blissful meditation, and far more of that warm pulsing activity in that center part of my head than normal, I became lucid in the dream. I knew I was dreaming but I could simultaneously feel my body laying on the couch as well, while my dream body seemed to be outdoors in the street somewhere near my house; this realization went on in nothing approaching a normal state of consciousness. I decided to stay in the dream instead of waking up, and so immersed myself within it completely and let go of the tether to my body.
Everything was enhanced and processing in a more unified visual way as well. Some part of me decided to float upwards, above the town and the city. If any of you are familiar with flying in dreams, you might know how difficult it can be to hang onto that feeling of relaxed focus that allows you to maintain flight. The harder your conscious mind tries the more you fail. This time I easily let go and that feeling grew and grew like a balloon as I floated up and up. The city reminded me of a cell, or galaxy, or atom - the fractal mirroring of each expressed throughout the whole. Floating upwards above all this and through the clouds, then above the earth, eventually I dove straight into the sun and into the heart of that ballooning orgasmic feeling in me. It was extremely blissful but words don't work here. When I emerged from the white light, I was floating above the plane of the milky way galaxy in a state of mind I can't even begin to explain.
Some of you probably already know I have bizarre dreams to begin with but this level of profoundness is FAR more common when engaging in these techniques, preferably in combination. Not hard evidence, no, but a glimpse of the possibilities is all.
The hard evidence is in the biochemical mechanisms and the brain research analyzed in the following chapters. And self experimentation.