{"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 09 | The Cellular Basis of Learning","html":"","width":"100%","height":180,"duration":1455,"description":"Episode SummaryRight now, as you listen, something extraordinary is happening inside your head. At thousands of tiny junctions between your neurons, calcium ions are flooding through molecular gates, enzymes are switching on like dominoes, and new receptor proteins are being inserted into your neural membranes. By the time you finish this sentence, the physical structure of your brain will have changed. This is what learning looks like at the cellular level.In this episode, we travel to a laboratory in Oslo, Norway, where in 1966 a young researcher named Terje Lomo accidentally discovered that synaptic connections could be strengthened for hours or even days. Together with Tim Bliss from London, he published findings in 1973 that would become one of the most cited papers in neuroscience, though it was largely ignored for an entire decade.We then dive into the elegant molecular machinery behind this process: the NMDA receptor, nature's own coincidence detector, which acts as a biological AND gate requiring two simultaneous signals before it opens. We trace the cascade from calcium entry through the CaMKII \"molecular switch\" to the insertion of new AMPA receptors and, ultimately, the activation of genes that make learning permanent. Along the way, we discover how Richard Morris proved the link between this synaptic mechanism and actual learning behavior, and how a 2014 experiment literally switched a memory off and on using light.Key Topics CoveredThe gap in understanding before LTP: Hebb's theory without experimental proofPer Andersen's laboratory in Oslo and the hippocampal slice preparationTerje Lomo's accidental discovery of long lasting potentiation in 1966Tim Bliss's arrival in 1968 and the landmark 1973 publicationThe NMDA receptor as a coincidence detector (biological AND gate)The magnesium block and voltage dependent gatingThe molecular cascade: calcium, CaMKII, AMPA receptor traffickingEarly LTP (protein modification) versus late LTP (new gene...","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}