Consciousness PP - Drugs Self-I nduced Variations in...

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Variations in Consciousness
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Drugs: Self-I nduced Variations in Consciousness What is a psychoactive drug? – a chemical substance that modifies mental, emotional, or behavioral functioning Used recreationally and medicinally How does it work? As an agonist - enhances the activity of a neurotransmitter (binds at the site like the NT, keeps it in the system longer) As an antagonist - inhibits or decreases the action of the neurotransmitter
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Drugs: Self-I nduced Variations in Consciousness Types of Drugs (see your book for greater detail) Depressants Stimulants Opiates Hallucinogens Marijuana MDMA
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Unformatted text preview: Drugs: Self-I nduced Variations in Consciousness • Most drugs of abuse work on the DA system – Why DA? – recall that it is the reward neurotransmitter – The original research – Olds and Milner (1953) • Were originally studying sleep but attached an electrode to a particular part of the brain (the medial forebrain bundle – located in the hypothalamus) • When the mouse pressed the bar, it stimulated the area • This was so pleasurable that the mouse would press the bar as many as 2000 times/minute! • The shock appeared to be more reinforcing than food, water, or sex...
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This note was uploaded on 05/29/2008 for the course PSYC 100 taught by Professor Smith during the Spring '07 term at University of Delaware.

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Consciousness PP - Drugs Self-I nduced Variations in...

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