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Location of cognitive functions and cortical electro-chemical efficiency

    It seems odd to me that even when I discussed the orientation at a conference on personality type there seemed to be quite a bit of disbelief that the functions could be located in specific quadrants of the brain. I donít know about some other people but it makes sense to me that the "sensing" function should reside in an area of the brain with three "sensory lobes" and that subjective interpretation should also reside in an analogous structure. Additionally it certainly makes sense to me that the most "abstract" and most distinctly human specific functions should reside in parts of the brain (frontal lobes) that are most uniquely developed in humans and least likely found in other animals. I think the confusion has been caused by imprecise testing and insufficient understanding of the complexity of thought. For localizing function it is necessary to determine the most discrete forms of data to test. (See pattern recognition and matrix IQ testing.)

The Physiology of Jungís Four Functions & Their Organization
By Katherine Benziger, Ph.D., © March 1998; September 1999
ďWith respect to the human cortex, functional specialization is said to exist in that: (1) the cortex is clearly divided into four almost equal elements, in that each hemisphere or half is further divided by a central or rondalic fissure which separates the frontal lobe on each side from posterior portion of the hemisphere, today known as the posterior cortical convexity; (2) each of these four areas can be shown function differently; and (3) each contributes differently based on its unique specialized capabilities.Ē

ďSignificantly, among neuro-physiologists there exists some disagreement about functional specialization. Some researchers argue, when looking from a particular perspective, that the brain is also highly integrated and seemingly at times redundant. Auditory information is processed in many areas. Indeed, even music is processed in many areas. Moreover, language in some persons can be shown to involve all four regions of the cortex. The key to this discussion is that the cortex is both specialized and integrated, much as an assembly-line or a computer.Ē
- Haier, Richard. Cortical Glucose Metabolic Rate Correlates of Abstract Reasoning and Intelligence, Studied with Positron Emission, by Haier et al. unpublished paper from January 1988.
- Haier, Richard. The Study of Personality With Positron Emission Tomography in Personality Dimensions & Arousal, ed. by Jan Stvelan & Hans J. Eyesenck. Plenum Publishing Company, 1987.

    I would like to read Dr. Haierís original research. While I find Dr. Benzigerís conclusions extremely informative I couldnít help noticing that she used the word "most" in the following statement,

ďMoreover, Haierís research has shown repeatedly that most people have one area which enjoys a much lower level of electrical resistance Ė using only one one-hundredth the oxygen / energy - when compared with all the other areas of that personís cortex.Ē

What does that mean? Here is a bit of intuitive exploration I conveyed to a friend on the matter. You can skip it if you prefer, as it is just speculative rambling.

"Right now I would not call them a 17th type. I would actually propose there are two and perhaps four other base types making 18 or 20. They would be "Ixxx & Exxx standard" and "Ixxx & Exxx super" using an enhanced MB notation. If there were only one, I would refer to it as the zero personality and not the 17th. I donít really have too make much of a case for it if you accept Dr. Haierís research. Apparently, there are indeed "some" people who do not have a quadrant that is 100% more efficient than the other three quadrants. This might make the persons functional preference xx. How their environment dictated the use of those functions would determine what kind of personality they would appear to have.

Functional efficiency is one factor and the speed of their RAS determines E or I so that determines how they use their functions. So an xx would be Ixxx or Exxx. I designated a standard and a super because I have many questions regarding Dr. Haierís subjects that showed no dominant quadrant. If you had an individual without a dominant (efficient) quadrant and that quadrant consumed 100% less glucose and oxygen (energy) as the other three quadrants what is the actual amount of energy consumed? Letís give it a value of 1eu and the other three quadrants 100eu. If Dr Haier found that some subjects did not have a dominant (efficient) quadrant what did they have? Did all quadrants consume 100eu or did all consume 1eu? If you had a subject that consumed 100eu in each quadrant I added the "standard" designation because this person would stay out of trouble (psychically healthy) and live a well adjusted and balanced life. On the other hand if a subject used only 1eu in all quadrants they would possibly be a kind of super human intelligence! Somewhere I read or heard that while a personís brain is only 5% of their bodyís mass it typically consumes 30% of their energy so here you would have a person whoís brain consumes comparatively very little energy in order to operate. The speculation goes on and on. Do some people have two or three quadrants that consume only 1eu? How about the speed of the cerebellum, the corpus collosum, conversion from short term to long term memory, etc.? Is the 1eu and 100eu relative? Does this help explain variation of IQ?"

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