It was noted by Marrion in 1986 that Kwakiutl (Annett, 2002) display high incidence of left-handedness. Riane Eisler has written of the partnership society qualities of Scandinavian societies. There are studies that suggest increased percentages of anomalous dominance among Scandinavian populations. In 1998, I wrote that equatorial populations migrating to Northern climates will be subject to higher degrees of autism and conditions characterized by maturational delay. Minnesota Somali children seem to be fitting this prediction.

In other pieces, I’ve discussed the hypothesis, first considered by Geschwind and Galaburda, that light mediated by the pineal gland could be influencing testosterone levels, thus engendering conditions characterized by maturational delay. They did not make the connection to heterochronic theory, but it seems fairly reasonable to mate migration with left-handedness. Yet, if Kwakiutl evidence maturational delay having lived in or near the Arctic Circle for thousands of years, then the effects of light on the pineal may show signs of creating maturational-delayed populations at the extreme Northern and Southern ends across the earth, without recent migration.

Are there signs of increased left-handedness in Southern Australia, Southern Africa and the Southern tip of South America? What about the Lapplanders? Consider Latino and African-American populations in Alaska.

Alcohol lowers testosterone levels in males. Fat increases testosterone and estrogen levels in females, lowers testosterone levels in males. Tobacco influences hormone levels. Cross referencing season of birth and parent alcohol, tobacco and fat consumption may offer insights into the origin of conditions characterized by maturational delay. Perhaps a confluence of several variables propels individuals into left-handedness with no left-handedness recorded in their family.

It is possible that in the lands characterized by little light for long periods of time, which often leads to depression, increases in alcohol consumption to medicate depression leads to ontological changes in the children. There are few studies that would suggest that a male can modify his genetics by the way he lives his life. Perhaps such evidence exists and could be examined by setting up predictions based on converging influences changing a male’s testosterone levels and impacting his children’s maturation rates.

Another group to examine for these effects is those that do not see the light of day. Maybe these people work nights, have very sensitive skin or spend almost all their time underground. What might be the handedness distributions and disease/condition constellations of their children? Cross referenced with the other hormone influencing variables, data about these people might reveal patterns.

The Kwakiutl are a unique culture in other ways than higher percentages of left-handedness. They are matrilineal. Perhaps we should be looking for signs of egalitarian societies in those places in the world where it is coldest.


Comments

This entry was posted on Sunday, February 8th, 2009 at 6:29 am and is filed under Somali Autism, Uncategorized. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
4 Comments so far

  1. cindy on April 29, 2009 1:03 pm

    wondering what autism and left-handed rates there are among populations with very high alcoholism rates (native americans). also wondering if native american populations farther north have higher alcoholism rates?

  2. Andrew on April 29, 2009 2:55 pm

    Excellent question. I don’t have an answer, though there have been correlations between some forms of alcoholism and left handedness. A study looking a native american populations, alcoholism, and handedness and might reveal some interesting patterns, particularly if the forms of alcoholism in indian populations are the same as the forms of alcoholism associated with left handedness.

  3. cindy on July 13, 2009 2:23 pm

    sorry, i’m a layman. what forms of alcoholism are there? are there different forms?

  4. cindy on July 13, 2009 2:25 pm

    i read today that alcoholism can also cause color blindness. i wonder if alcoholism in a family can predispose one to color blindedness.

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