brain sizes: Einstein's and women's
The 9th Witch
appalachian_witch at hotmail.com
Wed Jul 17 23:44:25 EST 2002
Bob LeChevalier <lojbab at lojban.org> wrote in message
news:r0dcju48rkn9rrtcg9385hacfeak7ssf1i at 4ax.com...
> "John Knight" <johnknight at usa.com> wrote:
> >> There are animals with more brain cells than humans have, no?
> >Correct. "no". None of them. Even 9 foot apes have brains a quarter
> >size of human brains. Dynasaurs had brains the size of an orange. The
> >human brain is a quantum leap in size, quality, and output.
> The human brain is around 1400 grams. Porpoises have brains weighing
> 1700 grams.
> Elephants and whales have significantly larger brains than humans
> with elephants having brains 3 times the size of humans and sperm whales
> having brains more than 6 times the size of humans (20 pounds). Blue
> have the largest brains
"At two, humans have the most brain cells that they will ever have in their
lifetime. If these cells are not used, they are simply deleted."
"We now know that an infant's brain contains 100 billion cells, the most
brain cells a person will ever have."
How did infants score on your test, John? According to your theory, since
they have more brain cells than either men or women, they should have scored
much higher than either category.
"Women's brains are more tightly packed with cells in the area that controls
mental processes such as judgement, personality, planning and working
memory, researchers have discovered.
A team from McMaster University, Ontario, Canada, found that women have up
to 15% more brain cell density in certain areas of the frontal lobe, which
controls so-called higher mental processes. "
"Women are just as good at math as men. At Earlham, half the math majors are
women, and those women include some of our strongest majors. Half the
students in our elementary classes are women. A survey of recent calculus
classes showed equal numbers of male and female students. The average female
student scored about half a letter grade better than the average male
student. At the faculty level, half of Earlham's math professors are women,
and our female faculty members have published more scholarly papers in
mathematics than have their male colleagues. To anyone believing that women
cannot do well at mathematics - or that men cannot do badly - our experience
offers abundant evidence to the contrary."
"Neanderthals had larger brains than we do, she pointed out, but obviously
they weren't smarter."
"Overall, however, men lose slightly more brain cells than do women"
"The exact reason for this difference is not known, but the opinion of
experts is that it is simply related to a larger body size in man (the more
cell muscles you have, more brain cells you need). This difference should
not be interpreted as a difference in intelligence or memory."
"At this point, researchers do not know how the structural differences
influence brain function. It's possible that male and female brains work at
a similar capacity but process information differently. For example, one
study shows that men and women perform equally well in a test that asks
subjects to read a list of nonsense words and determine if they rhyme. Yet,
imaging results found that women use areas on the right and left sides of
the brain, while men only use areas on the left side to complete the test.
Other research suggests that, on average, the female brain performs
better on some skills while the male brain executes other tasks at a higher
level. For example, tests show that women generally can recall lists of
words or paragraphs of text better than men. On the other hand, men usually
perform better on tests that require the ability to mentally rotate an image
in order to solve a problem. Mental rotation is thought to help people find
their way, according to researchers. Does that leave the majority of women
lost? Obviously not. Scientists believe that women may rely on their memory
advantage and recall landmarks to find a destination."
Have a nice day. Or not. Your choice...
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