Depression is characterized by a mood and behavior, that can affect the ability of
a person to perform daily activities and interact with others. Depression is an illness that
can be caused by biochemical and environmental changes. Chemical...
Repeated exposure to addictive drugs causes unmistakable changes to occur on both a neuronal and a behavioral level. Certain circuits in the brain of an addict are forced to change and adapt to an environment of drug-induced chemical imbalance....
