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Essay / Research Paper Abstract
5 pages in length. The motivation for substance abusers to engage in refraining from using drugs is impeded by the neurotransmitter dopamine, the chemical that brings about pleasure. Those with a biological propensity towards drug abuse initially experience enjoyment which then springboards into a greater need for that same dopamine response with each subsequent experience; this constant signaling for more and better pleasure occurs when dopamine travels into a nerve cell cluster underneath the cerebral hemispheres called nucleus accumbens. Bibliography lists 5 sources.
Page Count:
5 pages (~225 words per page)
File: LM1_TLCdrugmot.rtf
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about pleasure. Those with a biological propensity towards drug abuse initially experience enjoyment which then springboards into a greater need for that same dopamine response with each subsequent experience;
this constant signaling for more and better pleasure occurs when dopamine travels into a nerve cell cluster underneath the cerebral hemispheres called nucleus accumbens. Aptly named the reward pathway,
this process of gaining repeated pleasure from chemical ingestion eventually injures the nucleus accumbens, triggering an inability to govern how much dopamine is dispersed when influenced by drugs that ultimately
leads to the brain becoming less pleasured by the same thing that once gave it intense enjoyment; however, the overwhelming desire -- or willful need -- still remains (Anonymous, 2004).
In nature, rewards usually come only with effort and after a delay. Addictive drugs provide a shortcut. In a person who becomes addicted through repeated use of
a drug, overwhelmed receptor cells call for a shutdown. The natural capacity to produce dopamine in the reward system is reduced, while the need persists and the drug seems
to be the only way to fulfill it...Addicts may require constantly higher doses and a quicker passage into the brain. Its as though the normal machinery of motivation is
no longer functioning; they want the drug even when it no longer gives pleasure (Anonymous, 2004). Marijuana is considered to be much
more user controllable than cocaine or heroin, both of which are highly addictive substances; because brain impact occurs quite rapidly when cocaine is smoked in its crack form, it becomes
that much more addictive. Overstimulation of nerve cells from the dopamine property of cocaine creates a feeling of tremendous pleasure; this overload of dopamine causes the cell receptors to
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