The language I had discovered must correspond to something. Evidently it described key psychological states. The brain is, after all, a conscious organ, and surely cannot fail to be aware of even the minutest changes in its own activity. The scientific literature offered clues. Parts of the brain that are particularly active at any moment can be seen on monitoring equipment to have an improved blood supply.
Blood is vital to brain cells, because it bears oxygen and glucose.
The brain is thought to contain a hundred billion of these cells or neurones, each one connected up to perhaps ten thousand others. A neurone looks like a tiny spider with fibrous legs . One long fibre, the axon, extends like a cable for carrying electrical signals. When a cell gets a signal telling it to fire, the electrical potential across the cell membrane, after a tense build-up, suddenly switches from negative to positive. This action potential moves in a wave along the minuscule nerve cable until it reaches the nerve terminals, when it triggers the release of chemical neurotransmitters that carry the message on to all the cell's neighbours in the network.