0 a hormone (= chemical substance) that is made naturally in the body and may also be given as a drug --
To help people with Parkinson’s disease, scientists are developing medicines that cause the brain to make more dopamine.
Then, the doctors measured the amount of dopamine in the patients’ brains.
Parkinson’s disease is interesting for placebo researchers because the amount of dopamine created by the brain can be measured by brain scans.
In many cases, there was as much dopamine created with the placebo as with the medicine.
Cells in our brains create a chemical called dopamine, which helps control muscles.