chapter 14

chapter 14 - Section 4 Taste and smell TASTE Taste...

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Section 4 Taste and smell TASTE Taste Primaries: sweet, sour, salty, bitter, T papilla (nipple) types: fungiform (fungus-like), foliate (leaf-like), circumvallate (around the ramparts) T Taste buds (found on papilla), respond to more than one ‘primary' T taste cells (found within taste buds), no axons, connect/synapse with afferent fibres T coding of quality, activity across a population, pattern of firing of nerves related to perceptual abilities in rats (responses to different salts, T ammonium, potassium and sodium chloride), most fibres respond to more than one primary, spatial separation of receptor subtypes on tongue and in thalamus and cortex T taste thresholds depend on: temperature (different primaries alter differently), tongue region, genetics (phenylthiocarbamide: to 2/3rds of white T western folk tastes bitter; 1/3rd no taste), concentration (eg. saccharin low sweet; high bitter), age T taste preferences, Humans: sweet (+); bitter (-), mostly in place at birth; Cats and chickens: indifferent to sweet; rat/cat/rabbit/sheep: salt (+); hamster: salt (-)
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taste cravings, salt, calcium, potassium, etc. . specific changes in threshold when
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This note was uploaded on 04/20/2011 for the course PSYC 212 taught by Professor Shahin during the Fall '11 term at McGill.

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chapter 14 - Section 4 Taste and smell TASTE Taste...

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