Taste Lab Report - The Classical Tongue Map Revisited East...

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The Classical Tongue Map Revisited. East Tennessee State University March 26, 2006 Introduction: For decades the validity of the classic tongue taste map has been in question. The classic tongue map states that there are zones on the tongue in which certain flavors can only be sensed. http://www.musingsonthevine.com/graphics/sub/tongue.gif Fig. 1: The Classical Tongue Map showing the zones of taste reception. Figure 1 shows the commonly accepted map of the zones of flavor. The rear of the tongue was said to only be able to detect bitter flavors. The sides near the rear were supposed to only be sensitive to sour flavors. Salty flavors were thought only detected by sides near the front. The very tip of the tongue was said to be used in detection of sweet flavors. In the center of the tongue was a region where no taste could be detected. This classic taste map is a part of the curriculum taught in elementary, middle school, and high school science classes and until recently was widely accepted. Research has shown that a taste map can vary from person to person because taste reception is highly controlled by
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genetics (Drayna). Taste receptors must have an evolutionary advantage to have evolved to such a high degree in mammals. The tastes might have signaled an animal to rotten or poisonous plants. If a certain taste receptor is activated, then quite possibly the brain could decide that the food source will not be healthy for the animal. Does the classic tongue map say that those flavors can only be sensed on those areas of the tongue or are those zones just more proficient at detection of those flavors? Is the classic tongue map completely false or are there still some remaining truths? : The basic materials needed for our experiment are testing chemicals, applicator sticks, palette cleanser, and test subjects, along with data recording materials. For the applicator we used cotton swabs on a stick, similar to Q-tip brand. To cleanse the palette
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This note was uploaded on 04/05/2008 for the course BIOL 3260 taught by Professor Moore during the Spring '05 term at East Tennessee State University.

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Taste Lab Report - The Classical Tongue Map Revisited East...

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