This Lecture: Caffeine and nicotine are two of the most common psychoactive drugs in our society. How do they work? How dangerous are they? After reviewing how each of these drugs affects the brain - and why nicotine in particular is so addictive - Professor Polk offers several strategies to quit tobacco use. The Course: Addiction touches us all. What happens when your brain is on drugs? Discover the neural mechanisms that underlie the behaviors of addiction, and see how drugs and activities like gambling can hijack the brain and lead to behavioral problems. Understanding addiction can motivate an addict to seek treatment, and can lead loved ones to see the addict in a new way. All Lectures: 1. Addiction 101 2. The Psychology and Neuroscience of Reward 3. How Addiction Hijacks the Brain 4. Genetics-Born to Be an Addict? 5. Your Brain on Drugs 6. Why We Crave Coffee and Cigarettes 7. Alcohol-Social Lubricant or Drug of Abuse? 8. The Science of Marijuana 9. Stimulants-From Cocaine to Ritalin 10. The Science of Poppies, Pleasure, and Pain 11. The Gambler's Brain 12. Junk Food, Porn, Video Games-Addictions?