IUBio

Left-Handedness - Brain Damage?

James Howard phis at sprynet.com
Sun Dec 22 07:28:05 EST 1996


>In article <engelking-2012961128350001 at cust119.max18.san-francisco.ca.ms.uu.net>,
>  engelking at earthlink.net wrote:
>> I am a left-handed person and I have been recently reading up on the
>> causes of my handednes.. Many of the reports I have read conclude that it
>> is caused by either trauma to the brain at birth, it is genetic, or that
>> it is a form of brain damage (!). What is the status of all these theories
>> in the medical community? And also, do we left-handed people have any
>> special right brain skills (visual-spatial I've read?)? What are the
>> consequences of being left-handed? How do I differ from right-handers?

James Howard responds:
I invite you to read my post, "Flynn Effect ...yes, testosterone," posted
November 3rd., to sci.anthropology.paleo.  This includes an explanation of the
connection of mathematics and English skills with cerebral hemispheres.  The
connection of my post to your query is that left handedness often occurs with
"math genius."  Left handedness and math abilities result from influences of
testosterone on growth of the brain.  Now, since I mentioned math genius, I have
not posted, per se, on this topic, but my explanation of this phenomenon
involves the ratio of the hormone, DHEA, and testosterone.  You can read other
of my posts at sci.anthropology.paleo to gather an idea of the importance of
this ratio to brain development.




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