The work of the tender nerve is to coil and coil on its own accord and form the big brain stuff. These coiled stuff’s nerve bunch further twists for the purpose of giving hardness to the brain.
Coiling of the tender threads is the formation of the brain as a whole. Cerebellum and the nerve bunch in the back portion of the head are more tender in one side and hard in the other side like the rest portion of the brain.
Twisting is the cause for the formation of our brain, circuit making, finishing of the coils into rotating the generating static current in the brain stuff.
Hardness of the twisted nerve threads is inducing, generating more powerful static electricity in the brain.
The entire brain lobes are in the various parts inside the skull. Its working function can come in the next writing.
Thread spinning, stretching of twisted nerves, twisting is projecting the lobes, several lobes in one lobe varies from brain to brain. This difference is in the hereditary and it is giving the shape and weight of the brain skull. To do the electric circuit, the thin nerves are coiling which is its first nature. Bunch threads give the hard nature to the brain. Due to this, the electric motoring action is ever going on in the brain. So we are always alert throughout the 24 hours. 
Start to think by our thinking action is called the alertness of the brain.