Human brain is the most complex organ of human body which needs deep research and study in order to understand its normal behavior. In the presence of chemical substance or addictive drugs, the mechanism becomes much more complex. That is why previous studies on drug abuse and drug addiction were merely based on misconceptions and addictive behavior of the users.
Today we have much more material and information on the working of human brain in the presence of drug substances and so we can determine the working of brain in a better way. We can tell exactly how a person becomes addictive of substance and how it becomes difficult for him to leave drugs. This information will be useful in saliva drug tests in workplaces and educational institutions.
The Working of Human Brain during the Presence of Drugs:
It is commonly said that drug addiction affects the working of the brain and also indulge in some activities that have negative impacts on the addict’s life. Well, drugs does not only affect the brain rather it affects the working of whole organ system of the body.
Drugs directly alters the brain of the addict and affects the natural reward system of human body either willingly or unwillingly and results in euphoric effects on the drug users. These euphoric effects arise from the neurotransmitter named dopamine which controls emotions, motivation, cognition and feelings of pleasure.
Dopamine not only effects the natural behavior of human body but also initiates the cycle which forces the body to repeat the process again. The dopamine fills in the behavior from routine activities like sexual activity and eating in restrictive amount. When euphoric effects are felt inside the body, the brain teaches itself to repeat the same process again and again until it becomes a habit.
The consumption of drugs cause the person to act impulsively whereas the brain’s reasoning system delay that particular form of action. This reasoning system is circumvented and hence the resulting actions are undesirable and can have negative effects on the addict’s life.
Where some drugs deliver euphoric feelings at times, at other times it causes depression, paranoia and suicidal thoughts. The regular use of drugs causes the natural production of dopamine lower and so the person feels the dire need of use drugs to fulfill the demand of dopamine in human body. Read about the pathophysiology of drug addiction by following this link here.