NE lecture 10/4
Primate and human brain evolution
How can primates invest so energy into their large brains?
tissue reallocation(expensive tissue hypothesis)
extended development(late equals large)
why do primate have such big brains?
complex and flexibly behavior
ecological versus social
social brain hypothesis= large brains facilitate social interactions larger groups
select for larger brains
Dunbar shows relationship between neocortex ratio with the mean group size.
historical relationship between group size and brain size.
SBH doesn’t apply to social carnivores like lions
large brains facilitate pairwise social interactions individual recognition, social
pairbonding= lifelong bonding with one other individual
pairbonding individuals have bigger brains than non
primates are the only groups where the presence of pairbonding
doesn’t affect brain size because the ability to make relationships
with one other is generalized in all primates
theory of mind – primates are good at remembering which group
members did what, when, who they did it with, and who they did it
Humans have evolved to occupy unique lifestyle that takes advantage o