2009 Lab 3.4 - Cutaneous Receptors & Referred Pain...

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Cutaneous Receptors & Referred Pain
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Objectives 1. Describe the distribution of cutaneous receptors 2. Determine the 2-point touch threshold in different areas of the skin. 3. Define and demonstrate sensory adaptation 4. Define referred pain 5. Demonstrate referred pain
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Skin Sensory Receptors Detect mechanical, thermal, or chemical stimuli Sensory neuron conduct the impulse to CNS Brain’s interpretation will create sensory perception
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I. Temperature and Touch Receptors Detects f our sensations: 1. Warmth 2. Cold 3. Touch 4. Pain Pressure- detected by receptors in dermis Itch/Tickle- mysterious origin?!
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Table 3.1 ( page 108) Receptors, Sensation they detect, location
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Procedures 1. Pen with washable ink, draw a square, similar to the one on page 113 2. Follow steps 3-5 3. Record on page 113, Part A
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II. Two-Point Threshold Density of touch receptors in some parts of the body is greater than in other parts Largest density areas have greatest motor innervation ( face, tongue, lips, hands) Less dense areas are trunk, hips, legs
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2-Point Threshold test Follow procedures 1-3 on page 110 Record results on page 113, Part B # 1
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III. Adaptation of Temperature
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This note was uploaded on 12/22/2010 for the course BIOL 175L taught by Professor Wahba during the Spring '10 term at Coastline Community College.

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2009 Lab 3.4 - Cutaneous Receptors & Referred Pain...

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