Chapter 6
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In Chapter 6 we learn about sensation and perception, gestalt images, and the five senses. There are two theories regarding both sensation and perception: the bottom-up and top-down theories. The gestalt principles include the following: closure, continuity, proximity, and similarity. The five senses include : sight, touch, hearing, taste, and smell.
Taste
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Taste buds are a nest of taste-receptor cells. There are approximately ten thousand taste buds on the tongue and other parts within the mouth. These taste-receptors work with chemical communication. There are four basic tastes: salty, sweet, sour & bitter. There is speculation that there is a fifth taste called umami; which picks up the taste of MSG which is found in meat, shellfish, seaweed, etc.
Touch
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Basic skin senses include touch (pressure), warmth, cold, and pain. Along with these senses there are four variations such as itching, tickles, and painful burns. There is a gate-control theory of pain which states that there is a "gate" in the spinal cord through which sensations of pain travels through. Phantom pain is the pain that a person feels in a limb that is no longer there (ex: in an amputated leg).