a university professor at new york university and director of the emotional brain labs at the nathan klein institute. he's also the author of the books "the emotional brain" and synaptic self." kerry ressler. he studies the genetics and neurobiology of post-traumatic stress disorder focusing on the interaction between genes and environment. he is a professor at emory university. david anderson. he studies the neural circuits that control fear and anxiety. he is a professor of neuroscience at cal tech and a howard hughes medical investigator. and once again, my co-host is dr. eric kandel. as you know by now, he's a nobel laureate and professor at columbia university and a howard hughes medical investigator. he is, as you know, the mastermind behind this program and once again i'm pleased to have him here at this table to tell me what we're going to talk about this evening. welcome. >> thank you. pleasure to be here. >> rose: where are we going tonight? >> we're going to discuss emotions some more. emotions are feeling states that enrich our mental life. they lead us to seek out pleasure and