Psychology 2220A/B Study Guide - Ageusia, Endorphins, Ventral Posteromedial Nucleus

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Chapter 7 mechanisms of perception: hearing, touch, spell, taste. Neocortex: 6 cell layered outermost covering of the surface of the brain. 3 major principles apply to processing of sensory info both w/in and w/out sensory cortices: hierarchical organization: move through levels of sensory system, neurons respond optimally to stimuli of greater complexity and specificity. One guides actions by engaging our conscious awareness. Sensory systems characterized by the division of labor: sensory info processed by multiple specialized areas @ multiple levels and interconnected by multiple parallel pathways. How do the bits of analyzed info come together to give rise to our integrated perceptions: the binding problem. Not one specific area in brain where all analyzed info comes back together to be bound into integrated perception. Awareness of corticofugal (nerve fibre passing away from cerebral cortex) pathways passing though area of sensory analysis and allow higher areas of processing to influence lower levels of processing and have influence on perception (top-down)

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