Nick talks to Stanford psychiatrist and neuroscientist Dr. Karl Deisseroth. They discuss a range of topics about the brain, including autism, depression, bipolar disorder, dissociation, and more. They also talk about optogenetics, a technique Karl co-developed which uses light to control specific neurons in the brain, allowing neuroscientists to turn circuits in the brain on and off to reveal how the brain generates perception, emotion, and behavior. They also talk about Karl's new book, "Projections: A Story of Human Emotion."Support the showSign up for the free weekly Mind & Matter newsletter:[https://mindandmatter.substack.com/?sort=top]Learn how you can further support the podcast: [https://mindandmatter.substack.com/p/how-to-support-mind-and-matter]Become a Premium Subscriber to access full content library, including full premium episodes:[https://mindandmatter.substack.com/subscribe?utm_source=menu&simple=true&next=https%3A%2F%2Fmindandmatter.substack.com%2F]Try the Lumen device to optimize your metabolism for weight loss or athletic performance. Use code MIND for $50 off:[https://www.lumen.me/shop?fid=8731&utm_source=influencer&utm_medium=influencer&discount=MIND]