Psych 304 Lecture Notes - Nov.4th

Psych 304 Lecture Notes - Nov.4th - Psych 304 Lecture Notes...

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Psych 304 Lecture Notes Nov. 4 th , 2008 Lecture Outline: The Somatosensory System: 1. The skin and its receptors 2. Somatosensory cortices 3. The ascending pathways 4. Acute pain The Paradox of Pain: 1. Different types of analgesics - acupuncture 2. Descending analgesic circuit - role of endorphins 3. The gate control theory of pain 4. Chronic pain/acute pain and morphine treatment 5. Phantom limb - neuromatrix Somatosenses: (refer to diagram on separate sheet) - can be source of pain & pleasure - skin: - largest organ in the body - vital (cannot survive without skin; people with severe burns cannot survive) - regulates body temperature - have pain receptors in skin (there are no pain receptors in the brain) - has 3 main layers: (each layer is composed of multiple layers itself) - outer layer: epidermis (made out of dead, un-nucleated cells) - middle layer: dermis (contains collagen & elastin) - innermost layer: hypodermis or subcutaneous layer (has adipose cells) - cosmetics designed to improve elasticity of skin don't work unless they can penetrate to dermis layer, but skin acts as a barrier therefore it is unlikely that they do this - Receptive Organs: - fast adapting (react quickly to the environment) - hair receptor (eg. When we are cold)
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This note was uploaded on 05/09/2009 for the course PSYC 304 taught by Professor Comeau during the Fall '08 term at The University of British Columbia.

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Psych 304 Lecture Notes - Nov.4th - Psych 304 Lecture Notes...

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