Neuro eng Q's part 4 - sensations activate different...

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Kevin Creager Chapter 12 Questions 1. Imagine rubbing your fingertips across a plane of smooth glass and then across a brick. What kinds of skin receptors help you distinguish the two surfaces? As far as your somatic sensory system is concerned, what is different about the two surfaces? Mechanoreceptors which are sensitive to physical distortion help distinguish the two surfaces. We have mechanoreceptors that vary in their preferred stimulus frequencies, pressures, and receptive field sizes. The hairs on the skin can vary in preferred stimulus frequencies. Different
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Unformatted text preview: sensations activate different mechanoreceptors such as Meissners corpuscles and Pacinian corpuscles. When you rub your fingers across a coarse surface you feel it largely with your Pacinian corpuscles. You will feel this as a sensation of rough texture. 2. What purpose is served by the encapsulations around some sensory nerve endings in the skin? The encapsulation is a connective tissue around the nerve ending. The encapsulated nerve endings sense touch and pressure....
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This note was uploaded on 02/26/2012 for the course NEOUROENGI 400 taught by Professor Xiang during the Spring '12 term at St. Lawrence.

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