Dopamine is a type of neurotransmitter. Your body makes it, and your nervous system uses it to send messages between nerve cells. That's why it's sometimes called a chemical messenger. Dopamine plays a role in how we feel pleasure. It's a big part of our unique human ability to think and plan. It helps us strive, focus, and find things interesting. Your body spreads it along four major pathways in the brain. Like most other systems in the body, you don’t notice it (or maybe even know about it) until there’s a problem.
It’s hard to pinpoint a single cause of most mental health disorders and challenges. But they're often linked to too much or too little dopamine in different parts of the brain. Examples include:
Schizophrenia. Decades ago, researchers believed that symptoms stemmed from a hyperactive dopamine system. Now we know that some are due to too much of this chemical in certain parts of the brain. This includes hallucinations and delusions. A lack of it in other parts can cause different signs, such as lack of motivation and desire.
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