Tuesday, September 30, 2008

Free will and Brain

I am writing this post to throw some more light on the issue of free will and its basis in the brain. The brain has many subdivisions - lobes, nuclei, fibers and tracts connecting these areas etc. The most evolved portion of the brain dealing with - choosing actions based on goals, planning things in advance, taking steps to execute these etc is the prefrontal lobes. Anything that the brain encounters the first time is passed on to the these lobes to evaluation.This is because this area is specialized in handling any novel situation (cognitive novelty). For example, when you are learning to drive a car, each of your actions originate in and are monitored and controlled by the prefrontal cortex. Later when you are an expert driver, this task becomes a routine thing for the brain, and hence the prefrontal areas are spared from this routine to do important things like handling newer situations. Routinized tasks need not be under the control of this highly specialized neurons.
To sum up, the most developed area is let free to handle complex things and the older and less sophisticated areas take care of routine things. Division of labour. Just like your mom tries to supervise her newly recruited household help; later she alone manages the routine tasks. Mom is free to take up newer challenges.
This division of labor is for saving time and energy. Conditioning is also a similar method to save time and energy. There is nothing wrong in assuming that a bell will be followed by food, if this has been the case on several past occasions.
Such methods used by the brain should not be taken to be running contrary to free will.

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