{"type":"rich","version":"1.0","provider_name":"Transistor","provider_url":"https://transistor.fm","author_name":"The Knowledge Architects: Building Wisdom in the Information Age","title":"Episode 10 | Patient H.M. and the Geography of Memory","html":"","width":"100%","height":180,"duration":1352,"description":"Episode SummaryImagine waking up every morning with no memory of yesterday. Imagine meeting the same person hundreds of times and never once recognizing them. For 55 years, that was the reality of Henry Molaison, known to the world only as \"Patient H.M.\" until his death in 2008.In 1953, a surgeon in Hartford, Connecticut performed what he himself called a \"frankly experimental\" operation on a 27-year-old man crippled by epilepsy. He removed portions of both medial temporal lobes, including most of the hippocampus. The epilepsy improved. But Henry could never again form a new conscious memory.His tragedy became the single most important case study in the history of memory science. When neuroscientist Brenda Milner discovered that Henry could learn new skills without any memory of having practiced them, she revealed something astonishing: memory is not one thing. The brain contains multiple, independent memory systems, each housed in different structures and operating by different rules. We trace this discovery forward to Eric Kandel's Nobel Prize winning work in sea slugs, showing how molecular biology confirmed what a single patient's tragedy first revealed.Key Topics CoveredHenry Molaison's life, epilepsy, and the 1953 surgery that changed neuroscienceWhat Scoville removed and the catastrophic result: permanent anterograde amnesiaBrenda Milner's 50 years of studying a patient who never remembered herThe mirror tracing experiment: learning without knowing you have learnedThe explicit (declarative) vs. implicit (nondeclarative) memory distinctionSquire's taxonomy: mapping memory types to brain structuresThe double dissociation: hippocampal damage vs. basal ganglia damageThe weather prediction study by Knowlton, Mangels and SquireOther landmark amnesia cases: K.C., Clive Wearing, Patient E.P.Eric Kandel's radical gamble: studying memory in a sea slug (Aplysia)The molecular switch from short term to long term memoryThe post mortem examination of H.M.'s brain: 2,401...","thumbnail_url":"https://img.transistorcdn.com/FqjMDaQUSm1bYfkwwD6aDUnSGdwLjCiheWhxBb00zow/rs:fill:0:0:1/w:400/h:400/q:60/mb:500000/aHR0cHM6Ly9pbWct/dXBsb2FkLXByb2R1/Y3Rpb24udHJhbnNp/c3Rvci5mbS84YjIz/YzkwMzlmNGM5YmEw/NTJkOGYyMTk0YTMw/ZWM0Zi5wbmc.webp","thumbnail_width":300,"thumbnail_height":300}