facial expressions

What did Darwin argue about primate facial expressions?

that all humans (and even other primates) will produce the same or similar facial expressions in response to a core group of emotions

Compare the groups in which cross-cultural agreement is reached about facial expressions and which groups do not share this same consensus.

There is good cross-cultural agreement among people from industrialized societies around the world while there is less agreement from members of isolated, relatively small-scale societies

What two categories of facial muscle control expressions? 

• superficial facial muscles

• deep facial muscles

what 2 cranial nerves control facial muscles?

facial nerve and the trigeminal nerve

What is the name of the units that facial expressions can be broken down into? 

action units