Lecture notes detailing how drugs can influence the brain and the body. Also discusses the effects of dopamine and dopamine receptors, as well as the difference between biological dependence and addiction.
PSYCH 101
Boise State University
Lecture Notes: Effects of Drug Addiction
First use/rare use of addictive recreational drug: brain is flooded by dopamine, pleasant
slowness, euphoria, feeling of extreme pleasure, orgasm-like, calmness
Regular use: person doesn’t feel normal without substance, body and brain adjust/reduce
receptors and production of NT to account for regular outside supply. Person becomes
dependent on outside source to maintain homeostasis.
Most substance dependence follows “hypo-dopaminergic” hypothesis:
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Dopamine mimicked by outside source
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Less natural dopamine release
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Less receptors for dopamine
Biological dependence vs. Addiction:
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Biological dependence is often a prerequisite for addiction, but not equal to it
Addiction: craving/pursuing an intensely pleasurable/rewarding experience despite serious
consequences/repercussions
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