Section3-5-1 - 3/22/12 Amygdala: emotion Hypothalamus:...

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3/22/12 1 Other Cortex Cortex: Sensory perception Amygdala: emotion Hypothalamus: hunger/satiety Note parallel processing: multiple analyses all at same time. Learned taste affect Show ReFex ingestion/rejection behavior Don’t show learned aversions The Pleasures of Taste • Speci±c hungers theory: The idea that de±ciency of a given nutrient produces craving (a speci±c hunger) for that nutrient – Cravings for salty or for sweet are associated with de±ciencies in those substances – However, the theory has not been supported for other nutrients, such as vitamins – Theory only holds for sweet and salty foods Genetic Variation in Taste Experience Phenylthiocarbamide (PTC) tastes dramatically different to different people – Bitter taste to some but not to others – 1960s: Started using propylthioracil (PROP) instead of PTC because it is safer Gene for PTC/PROP receptors discovered in 2003 – Individuals with two recessive genes are nontasters of PTC/PROP – Individuals with one or more of the genes are tasters of PTC/PROP 1. More ²ungiform papillae (than taster) 2.
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Section3-5-1 - 3/22/12 Amygdala: emotion Hypothalamus:...

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