Gustation - 1 Gustation The sense of taste. 2 Kinds of...

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Unformatted text preview: 1 Gustation The sense of taste. 2 Kinds of Tastes Salty Sour Sweet Umami (?) Bitter 3 Why Taste ? 1. Sweet tastants (high calorie foods) 2. Salty tastants (foods for homeostasis) 3. Bitter tastants (poisonous foods) Provide information about foods 4 History [Sensation of taste] lies between sweet and the bitter on the side of the sweet, the succulent on the side of the bitter, the saline [and] between these come the pungent, the harsh, the astringent, and the acid[ ic ]. Aristotle Sweet Succulent Bitter Sour Salty Pungent Harsh Astringent 5 Hennings Tetrahedron Salty Bitter Sweet Sour Henning (1916) 6 Detection of Taste High threshold (mM) for salt, sweet, and sour tastants. Low threshold (M) for bitter tastants. If equal quantities (mM) of salt, sweet, sour, and bitter are added in water. Only bitter sensed. 7 Taste Regions in Oral Cavity Epiglottis Pharynx Palate h t p :/ w w w .m y th o s .c o m Esophagus Larynx Tongue Taste regions in oral cavity comprise of palate, pharynx, epiglottis, larynx and esophagus 8 Tongue and Taste Map Sweet Sour Salty No Taste Bitter For a number of years it was thought that there was a distinct taste map on the tongue, i.e., certain tastants could simulate the tongue in specific areas of the tongue. 9 Reorganization of Taste Map S a l t y S w e e t S o u r B i t t e r Now it is believed that different taste sensations are present in all locations of the tongue, however some of them are dominant in one place than the other (Bartoshuk, 1993; Collins, 1974; Yanagisawa, 1994). 10 Papillae Circumvallate Fungiform Filiform (Non-gustatory) Taste buds Foliate 1-5 taste buds 1000s taste buds 1000s taste buds 11 Taste Bud Taste buds Pour Saliva Taste cell Gustatory afferent nerve 50-100 Taste cells in...
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This note was uploaded on 03/09/2010 for the course PSY 4293 taught by Professor Ahmad during the Fall '09 term at Henderson.

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Gustation - 1 Gustation The sense of taste. 2 Kinds of...

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