Robin Dunbar, an
evolutionarypsychologist and social-
brain theorist, and others have
documented correlations between
brain size and social-group size in
many primate species. The bigger an
animal's typical group size (20 or so
for macaques, for instance, 50 or so for
chimps), the larger the percentage of
brain devoted to neocortex, the thin but
critical outer layer that accounts for
most of a primate's cognitive abilities.
In most mammals the neocortex
accounts for 30 percent to 40 percent
of brain volume. In the highly social
primates it occupies about 50 percent
to 65 percent. In humans, it's 80 ercent.
"[N]o such strong correlation exists
between neocortex size and tasks like
hunting, navigating, or creating shelter.
Understanding one another, it seems,
is our greatest cognitive challenge."
Do you ever feel misunderstood?
does any of this make sense?
2007-07-16
08:37:07
·
3 answers
·
asked by
atheistforthebirthofjesus
6
in
Other - Society & Culture