Archive for the ‘epiphenomenalism’ Category

Neuroplasticity

Sunday, April 26th, 2009

Although epiphenomenalism may be nearly assumed by many doctors and patients alike since it seems to match data related to impaired neurological function, some of the research in neuroplasticity likely refutes the entire concept of epiphenomenalism. Early research demonstrated that when people learn new skills, such as typing or piano, that areas of the motor cortex of the brain actually increase in size to match. Later research demonstrated new brain connections, after some forms of brain injury, sometimes form to areas of the brain which would otherwise have processed information from different areas of function. This process actually restores the lost functioning, even with different areas of the brain processing the information.

Although these studies were fascinating as they showed the neuronal connections and biological functioning of the brain changed as a result of essentially newly learned tasks, some researchers minimized the results with arguments that this was largely a unique ability for repair following injury. One of the more recent studies was a true paradigm changer. In this research, Tibetan Buddhist monks participated in functional brain imaging studies while practicing a compassion based meditation technique. The finding was astounding: monks showed a novel Gamma brainwave pattern in the frontal lobe, which correlated with the subjective sense of blissfulness. This brainwave pattern had never been seen in any non-pathological state before, and its presence and strength was only related to the number of hours of meditative practice. No other demographic factors correlated with the finding, which suggested a clear circumstance in which willed meditative practice altered brain function over extended practice.

Since epiphenomenalism requires that mental process is only an accidental byproduct of neuronal firing, there is no conceivable way that mental process could actually effect the biological structure. This latest research proves just the opposite: that mental process changes the biology of the brain. Clearly then, any form of biological monism cannot account for this research finding. A different model is needed which accounts for the research data.

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Epiphenomenalism

Monday, April 6th, 2009

The version of mind brain interaction most popular in neuroscience these days is a version of physical monism called epiphenomenalism. Some form of epiphenomenalism is essentially required from a physical monist perspective to account for anything resembling mind or qualia. This perspective describes an emergence of consciousness or mind from the biological complexity of the neuronal net. Hoffstadter and others assume this perspective, and argue that new phenomenon arise from complexity in many physical systems. Examples often given include the complexity of fluid motion not being clearly predictable from the observation of a single water molecule. Other philosophers find the concept so revolting that they don’t even dignify it as a legitimate perspective at all.

Arguments from complexity do create interesting an interesting delimma, however. If the number of molecules in the Empire State Building meet a critical number, could they interact in a manner analogous to consciousness? If the number of Chinese in China reach a critical mass, does the country itself gain the quality of consciousness? Chalmers and others argue that, in fact, China would become a conscious being at the level of a nation due only to complexity itself. Each person would have at least the interactivity of a neuron, and if enough interacted that would mirror neural nets, and if the total reached a critical mass then “consciousness” would arise. Although the experts who defend the complexity argument are forced to this position in order to maintain a coherent perspective, it is an increasingly difficult position to reasonably defend, in my opinion. What might be defined as the consciousness of a country or other large aggregate of interacting materials seems woefully different than what each of us experience as consciousness on a day to day basis, largely based upon the difficulty of defining who or what might actually experience that form of consciousness.

A key foundation of the principle of epiphenomenalism is the assumption that consciousness is an unintended byproduct of neuronal complexity. The corollary of this assumption is that consciousness, or perhaps mind, flows from the biology of the system, and could not even in theory control or alter the biological system itself, given that it is an unintended byproduct. Recent studies employing brain scanning technology bring this a priori assumption into clear debate.

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