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(11) A person’s compulsive behavior may be caused by a condition called obsessive-compulsive disorder (OCD). People with OCD repeat behaviors over and over again to reduce anxiety caused by obsessive thoughts.(12) An excess of dopamine can also cause overstimulation, an overactive sex drive and self-destructive behaviors.It plays important roles in attention, mood and movement.It is also linked to aspects of human behavior, including motivation and pleasure-seeking.
, dopamine is crucial to motivation, learning via reinforcement, and addictions involving food, shopping, sex and gambling.[post-views] By Emily Miller Some call it the “brain’s reward molecule;” others know it as the “feel-good chemical.” But to most, it’s simply called dopamine.Dopamine is a chemical found naturally in the brain that acts as a messenger between brain cells.One time, the researchers boosted the dopamine in the volunteers’ brains using a low dose of L-dopa and then asked the question.The other time, the volunteers were given a placebo before the question.