The nervous system consists of two parts

Scientists have known for some time that early increases in strength involve changes in the connections between the brain and muscles.

Particular bundles of neurons and nerve fibers carry commands from the brain's motor cortex to the spinal cord to the muscles. When the neural input to your muscles increases, the commands become more forceful, and the muscles should respond similarly. When strength training, the initial gains are about strengthening the reticulospinal tract. Only later do the muscles start to grow.

What is it about brain matter that gives rise to consciousness? In particular, the neuronal correlates of consciousness (NCC) - the minimal neuronal mechanisms jointly sufficient for any conscious experience.

Consider this question: What must happen in your brain for you to experience a toothache?

The whole brain can be considered an NCC because it generates experience continually.

• When parts of the cerebellum, the "little brain" underneath the back of the brain, are lost to a stroke or otherwise, patients may lose the ability to play the piano, for example.  But they never lose any aspect of their consciousness. This is because the cerebellum is almost wholly a feed-forward circuit. There are no complex feedback loops.
• The spinal cord and the cerebellum are not enough to create consciousness. Available evidence suggests neocortical tissue in generating feelings.
• The next stages of processing are the broad set of cortical regions, collectively known as the posterior hot zone, that gives rise to conscious perception. In clinical sources of causal evidence, stimulating the posterior hot zone can trigger a diversity of distinct sensations and feelings.
• It appears that almost all conscious experiences have their origin in the posterior cortex. But it does not explain the crucial difference between the posterior regions and much of the prefrontal cortex, which does not directly contribute to subjective content.

Congenital Insensitivity To Pain (CIP) is a rare genetic condition in which a person does not feel any pain, with no warning signs of ‘hurt’ being registered in the brain even after the body gets injured or damaged.

No one with this condition survived till adulthood due to them not able to act on the(unfelt) pain, which could have saved their lives.

The very concept of pain, where it locates and provides the severity of the problem, is an extremely important part of the human body mechanism, as it operates on various dimensions.

As soon as we touch a hot pan (thermal), our hand is located by the brain, along with the intensity, which is extremely unpleasant and diverts your thoughts towards it, demanding full attention (cognition), making us feel unhappy (emotional).