Color-Coded MRI Scans of Chronic Methamphetamine Users Showed That They

question 669

Multiple Choice

Color-coded MRI scans of chronic methamphetamine users showed that they had:

• A) lost up to 10 percent of their brain tissue in limbic system areas involved in emotion and reward.
• B) experienced a sharp increase in the number of dopamine receptors and a sharp decrease in the number of serotonin receptors.
• C) experienced significant growth in the hippocampal area of the brain, which improved their scores on standard memory tests.
• D) developed hypersensitivity to a wide range of addictive drugs, including cocaine, heroin, and barbiturates.