What if the brain organizes thought not as a continuous stream but as a series of discrete packets, timed by nested brain oscillations? Neuroscientist John Lisman explains how theta and gamma rhythms work together to chunk information into ordered sequences , a coding scheme he proposed 20 years ago that recent experimental breakthroughs have finally confirmed. Subscribe for more from the Convergent Science Network podcast series. John Lisman joins Paul Verschure and Tony Prescott at the BCBT summer school to revisit his influential theta-gamma coding hypothesis, first published with Idiart two decades earlier. The core idea is that within each cycle of the slower theta oscillation (roughly 5–15 Hz), the brain fits approximately six or seven discrete gamma cycles (30–100 Hz), and each gamma cycle carries a distinct piece of information. In the hi ...