PSYC1002 Lecture Notes - Lecture 13: Dimensionality Reduction, Lingual Papilla, Sodium Chloride
19 May 2018
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Department
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Professor
Filiform - no taste function, located at tip of tongue, different shapes in different
species, draws in food, acts as an abrasive (most numerous)
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Fungiform - visible to eye on anterior portion of tongue (tip), huge variation
between people
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Foliate - sides of tongue, looks like folds, taste buds in folds
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Circumvallate - large visible structures, like inverted v on back of tongue
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(also taste buds on roof of where soft and had palates meet)
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Screen clipping taken: 4/11/2017 4:46 PM
4 types
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Papillae - gives tongue its bumpy appearance
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Huge variation in number of papillae and taste buds between people
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Taste
Chemical molecules make direct contact with chemoreceptors on tongue
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Huge dimensionality reduction into just 5 primary taste sensations
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Sensation
Description
Detection threshold, how sensitive to taste
we are
sweet
identify energy rich nutrients
One part glucose in 200
Umami/savour
y
detection of amino acids
salty
maintain electrolyte balance
One part NaCl in 400
sour
acidity, dangerous at high
levels
In one part HCl in 130000
Bitter
potential poison - huge class
In one part quinine in 2000000
L2 - taste, smell and flavour
Saturday, 4 November 2017
4:44 PM
perception Page 1
Screen clipping taken: 4/11/2017 6:04 PM
Screen clipping taken: 4/11/2017 6:04 PM
Labelled-line model
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We have an innate preference for sweetness, need enough energy to grow a body
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Some humans genetically prone to have more fungiform taste receptors around the tip and
sides of their tongue
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More common among Asians and Africans
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More likely to occur in women
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Unlikely to enjoy eating Brussel sprouts and broccoli
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Unlikely to consume coffee and fatty foods
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Identified using 6-n-propylthiouracil (PROP)
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Females have more super-tasters and fewer non-tasters than males
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Asian australians have more super-tasters and fewer non-tasters than caucasian
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Super-tasters
perception Page 2
Document Summary
Filiform - no taste function, located at tip of tongue, different shapes in different species, draws in food, acts as an abrasive (most numerous) Fungiform - visible to eye on anterior portion of tongue (tip), huge variation between people. Foliate - sides of tongue, looks like folds, taste buds in folds. Circumvallate - large visible structures, like inverted v on back of tongue (also taste buds on roof of where soft and had palates meet) Huge variation in number of papillae and taste buds between people. Chemical molecules make direct contact with chemoreceptors on tongue. Huge dimensionality reduction into just 5 primary taste sensations. Detection threshold, how sensitive to taste we are sweet identify energy rich nutrients one part glucose in 200. Umami/savour y detection of amino acids salty sour maintain electrolyte balance one part nacl in 400 acidity, dangerous at high levels. In one part quinine in 2000000 perception page 1.
