Re: chimps stronger than humans

On Apr 8, 10:58 pm, "James Howard" <jmh.anthropogeny....@xxxxxxxxx>
wrote:
(...a try to see if I can post... could not the past few days...)

It is my hypothesis that all tissues rely on DHEA for optimal function of
all tissues, especially the brain.  Therefore a competition exists for
available DHEA.  I think the brain evolved during mammalian evolution to
increase its ability to take DHEA.  Hence, the large brains of mammals.
Further, I think primates evolved because of increased use of DHEA by the
brain due to exposure fetal brain sizedue to exposure to increased
testosterone in female primates.  Extended, then humans evolved because of
dramatically increased maternal testosterone which may be "seen" when female
hominids increased in size relative to males.

Testosterone increases androgen receptors which absorb DHEA.  Therefore, as
the brain increases in size due to increased absorption of DHEA, there is
less DHEA for other growth and development.  Hence, as brain size increases
the body decreases in robustness at the same time.  Chimps produce less
testosterone and more DHEA; their brains are smaller and their muscles are
stronger.

((If interesed, see chart of testosterone in the primates, top, right ofhttp://www.anthropogeny.com/evolution.htmland my published papers re
mammalian, primate, and human evolution.)



Brains grew larger in order to better compete for DHEA? Talk about
your conclusion leading your evidence. What bollocks!

Ross Macfarlane

.

Relevant Pages

  • Re: chimps stronger than humans
    ... I do not say "cold equals increased growth of brain and body." ... that higher DHEA allows living in the cold and extra DHEA increases growth ... these groups is due to the increased male testosterone. ...
    (sci.anthropology.paleo)
  • The Mechanism of "Pruning" in the Human Brain
    ... The development of the human brain is rapid following birth, ... The large growth of a baby?s ... of neurons and synapses. ... It is my primary hypothesis that DHEA optimizes replication and ...
    (sci.med.psychobiology)
  • The Mechanism of "Pruning" in the Human Brain
    ... The development of the human brain is rapid following birth, ... The large growth of a baby?s ... of neurons and synapses. ... It is my primary hypothesis that DHEA optimizes replication and ...
    (sci.med.psychobiology)
  • The Mechanism of "Pruning" in the Human Brain
    ... The development of the human brain is rapid following birth, ... The large growth of a baby?s ... of neurons and synapses. ... It is my primary hypothesis that DHEA optimizes replication and ...
    (sci.psychology.theory)
  • The Mechanism of "Pruning" in the Human Brain
    ... The development of the human brain is rapid following birth, ... The large growth of a baby?s ... of neurons and synapses. ... It is my primary hypothesis that DHEA optimizes replication and ...
    (sci.bio.evolution)