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Unformatted text preview: PNS-Somatic Nerves and Autonomic NS Primate Brain Evolution 1. Enhanced visual system 2. Depth perception 3. Eye-hand coordination Why vision?Arboreal and insect-eating so needed depth perception crossing over went from 100 to 50 so we don’t have eyes like horses in chiasm Brain Expansion-Tripling, increasing in cortical capacity Neocortex expansion-must be 6-layered and folding (species-specific) Cortical Specificity-extreme regional specificity (structure and function) The Taung Child Habilis-tool maker Cultural Revolution 40kya-needed Triune Brain Basal Ganglia and…Limbic System PNS also evolves Primitive vagus Nerve-PS-freezing in danger; reptilian adds fight or flight to sympathetic Mammals add fast component which modulates heart rate in social behavior Behavorial Endicronology-Adrenal cortex surrounds medulla in mammals, cortisol Cortisol is a cofactor for andrenergic release ***cortex expands as a sheet...
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- Spring '11
- Triune Brain-Reptilian Brain, Basal Ganglia and…Limbic, Endocrine Systems-Remote/Evolutionary Causes