Thought selection by the brain
There are 2 levels of selection in the brain. In the first level thoughts are selected from the memory based on chance and power. A thought asserts its power by blocking other thoughts by releasing G.A.B.A., a neurotransmitter that inhibits other neurons from firing. The amount of power a thought has, depends on the amount of thoughts it can block. And how far away the thoughts are located in the memory. Generally painful thoughts are more powerful because they need it . As they are discriminated against in the second level. In the second level most rewarding thought get selected out of the few that made it to the second level. Thoughts with most dopamine (or pleasure transmitter) and least pain reaches the consciousness. There are special reward removal systems in the brain. When one thought is giving pleasure for more than a given amount of time, this system tells it to stop. Otherwise the thoughts will get repetitive. Also there are special G.A.B.A. pathways in human brains. In order to stop neutral thoughts from blocking painful thoughts. As pain is very important for efficient functioning of the brain as we will discuss. Also 1 thought can have many parts. Some parts get replaced while some parts remain resulting in logical thinking.
What is Pleasure/pain ? Does an organism's suffering equal it's pleasure ?
In this universe energy remains conserved. That is to say, for every positive acceleration there is a deceleration. If we define power as difference in the ability to survive. How can power difference be created in equal mass systems (and equal energy consumers). The trick lies in getting more variety in acceleration for the same worth of deceleration. Total amount of power gained = variety in motion for same amount of energy consumed. If the system consists of n particles which can independently move in certain range. Then controlled variety in motion will give huge number of options to the system. Which can be traded for survival advantage. So the total amount of power gained for a given amount of energy= ∆(options). More a system trades frequency of a old options for new options, more the power gained. For same amount of energy. Potential power can be defined as (energy consumed)*(% variety produced)
Or, (variety*frequency consumed)(% variety produced)
Or, (options(Oi)*frequency(Fi) consumed)( new options produced(nO))/total options produced(O))
In our brains, memory is the number of options. While conscious thinking is the potential. The thoughts which add maximum to our memory or the ones with maximum (Oi*Fi)(nO)/(O) will occupy our consciousness at a given moment. They are the thoughts that will give the maximum pleasure. For example music. In music the frequency is higher than in ordinary sound. The number of options are lesser but they are more than compensated for. Now if each note of the music is forming equivalent new memories, it will always be chosen over ordinary sound. So total of new memories formed is the total amount of pleasure gained. Pain is memory lost. It also explains the observation that depressed people have smaller memory area.
But in healthy people the memory area is limited so he cannot be much more happier than sad. Unless revolutionary mutations arise which allow him to store more information per unit area. His brain has two choices. One is to always keep the memory at maximum. Other is to keep increasing and decreasing the memory. Since the environment keeps on changing (also he is supposed to change the environment), the second option gives much more adaptability and power. The ordinary consciousness has been modified in organisms to balance pain with pleasure and not just to seek pleasure.
Thought selection by the brain