If you ever touched a live wire, or two poles of a battery, you have experienced your sensitivity for and conductivity of electricity. Don’t worry if you haven’t. Your nervous system acts as a communication network, transmitting information from our senses, muscles and organs back and forth.
You have three cloud networks for all the electricity buzzing along your nerve cells right now, coordinating millions of simultaneous signals along simple rules. Each node of the network has lots of input and output connections to other nodes, and can fire impulses more than 100 times per second.
Multiply this with trillions of neurons, and you will understand that a lot of electrickery happens within your nervous system at any given moment, definitely much more you want to spend attention on.
The cloud networks host the centre of each node, the body of a nerve cell. Out of the cell body grow the communication channels, the axons. When you pick up a cup, the axons on your fingertips connect with the nerve cell body within the brain. Imagine axons as tentacles of neurons.
Your arms and legs fulfil different functions from your trunk or your head. Limbs seem more disposable, but rarely develop a life on their own. Skin covers the entire surface of your body, and that’s precisely where your brain ends. Your nervous system looks more like a jelly fish with heaps of entangled tentacles than the inside of a walnut.
If you could see a little blue dot when a nerve cell body in the brain fires, and a tinier golden dot as the signal moves along its tentacle, then you would witness a brilliant fire work. Not all of your electric activity focusses in your brain. Add green dots for nerve cell body within the heart, and orange dots for the gut nervous system to add a bit more sparkle.
The spine contains abundant numbers of neural cell bodies while connecting the cloud network centres heart, brain and guts. It contains the colours of the rainbow from red to light blue, your skull adds the remaining frequencies of the visible spectrum.
Luckily, like all systems in your body, the electric system largely organises itself in response to its internal and external environment. On the highest level, you can distinguish (with some training) the nerve centres for thinking, feeling and moving.
As an experiment, map the gut centre (lower dan tien) as the feeling centre, the brain as movement centre and the heart as thinking centre.