Purpose: Researchers wanted to identify the effects of cocaine abuse and how it can lead to drug addiction and cause other serious changes to how our nervous systems functions; due to the decrease level of dopamine found in the consumer’s brain. Researcher’s decision to conduct research is to emphasize the importance on the level of dependence that dopamine has in our brains, and the serious consequences it may result due to any abnormality. Method: Researchers outreached to several candidates who had a long history of using cocaine, any other drug substance other than cocaine, or had previous history of any neurological issue. Those candidates were their experimental group. Whereas their control group underwent several studies to confirm
