PSY100H1 Chapter Notes - Chapter 14: Nucleus Accumbens, Heritability, Eval
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PSY100H1 Full Course Notes
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1000 ppl a day are killed in local wars around world, in ancient societies, as many as of all men were killed in war, 50mill killed in wwii. Do not comm. w/ each other, which is why facial exp are asymmetrical. Receive input from primary motor cortex (precentral gyrus) + subcortical: upper third and lower two thirds are controlled differently. Upper = ipsi + contra facial nerve input. Lower = primarily controlled by by contra facial nerve input: thus damage to motor cortex lower paralyzed + sag, upper spared. 2 major paths control facial exp: input from motor cortex (voluntary ex. Smiling on command: subcortical (spont expression ex. Smiling because you"re legit happy: a condition called volitional (voluntary) facial paresis (paralysis) = damage to motor cortex making one unable to smile on command on the contra side. But invol is fine: in contrast, parkinson"s = subcortical problems so can"t smile spont but can by command = emotional facial paresis.
