Summary
Andrew Huberman speaks with Dr. Victor Carrion, Vice-Chair of Psychiatry and Behavioral Sciences at Stanford School of Medicine, about the science and treatment of post-traumatic stress disorder in children, adolescents, and adults. Dr. Carrion explains how PTSD develops from stress and trauma, how elevated cortisol during development physically alters brain structure -- particularly reducing prefrontal cortex volume -- and why children are especially vulnerable. They discuss the significant overlap between PTSD and ADHD symptoms, including attention difficulties and emotional dysregulation, and how misdiagnosis between the two is common.
The episode centers on Dr. Carrion's cue-centered therapy (CCT), which helps individuals identify triggers, build a personal "toolbox" of coping strategies, and develop a coherent narrative around traumatic experiences. Specific tools include the 4-corner square response for mapping physical sensations, emotions, thoughts, and behaviors associated with triggers, and a "feelings thermometer" for calibrating emotional intensity. They also discuss a school-based yoga and mindfulness curriculum (Pure Power) that has shown measurable improvements in stress resilience, mood, and sleep, as well as the role of deliberate cold exposure in building agency and emotional regulation.
Key Points
- Childhood trauma physically alters brain structure by elevating cortisol, which reduces prefrontal cortex volume and impairs executive function
- PTSD and ADHD share significant symptom overlap -- attention difficulties, emotional dysregulation, and impulsivity -- leading to frequent misdiagnosis
- Cue-centered therapy (CCT) helps individuals identify trauma triggers and build personalized coping toolboxes that restore a sense of agency and control
- The 4-corner square response maps triggers across four dimensions -- physical sensations, emotions, thoughts, and behaviors -- to build awareness and interrupt automatic reactions
- Transgenerational trauma can transmit stress responses across generations through both epigenetic mechanisms and behavioral modeling
- School-based yoga and mindfulness programs (Pure Power curriculum) show measurable improvements in stress resilience, mood regulation, and sleep quality
- Deliberate cold exposure can serve as a controlled stressor that builds agency and emotional regulation capacity, relevant to PTSD recovery
Key Moments
Dr. Carrion's approach: combining mindfulness with neurobiology to treat childhood PTSD
This episode explores the differences between anxiety, stress, and trauma, and how mindfulness combined with cognitive behavioral therapy maps onto the underlying neurobiology of PTSD at different stages.
"What makes Dr. Carrion's work unique is that it combines the psychological, the neurobiological, but also practical tools such as mindfulness."
Cold exposure as a stress inoculation tool: practicing frontal control over the limbic system
The adrenaline response to cold is non-negotiable. That makes cold exposure a practice ground for frontal cortex control over limbic stress pathways — the same skill needed to recover from PTSD.
"The adrenaline response to uncomfortable cold is non-negotiable. What you're doing is practicing frontal control over the limbic pathways."
School yoga program eliminated discipline referrals and added 73 min of sleep per night
After 3 months of yoga and mindfulness in classrooms, zero students were sent to the principal's office. A larger randomized controlled trial found students gained 73 minutes of sleep and increased deep sleep.
"None of those kids in those classrooms had gone to the principal's office in all that time. They hadn't gotten in trouble."
Classroom yoga and mindfulness RCT: 73 more minutes of sleep, deeper REM, quieter amygdala
A district-wide randomized trial showed yoga and mindfulness increased total sleep by 73 minutes and deepened sleep. Preliminary brain imaging data shows decreased amygdala activity after the intervention.
"It increased 73 minutes of sleep. And it increased the depth of sleep. Preliminary data shows those kids decreased the activity of their amygdala."
Teaching teachers to lead yoga is more effective than bringing in yoga instructors
Having teachers lead the yoga and mindfulness sessions worked better than bringing in yoga instructors who couldn't control a classroom. Simple poses during math class for 10 minutes were enough to see results.
"The best approach was to teach the teachers and have the teachers teach the students, because the yoga instructors had no training on how to control a classroom."
Scaling yoga + mindfulness across all of Puerto Rico's schools to study resilience
Puerto Rico's entire island is one school district, enabling island-wide implementation. All teachers are being trained in yoga/mindfulness and all counselors in cue center therapy for PTSD.
"The whole island is one district, meaning if you do something like this program, you can implement it island-wide. All the teachers will be trained in the yoga and mindfulness curriculum."
Brain organoids + Puerto Rico trial: bridging genetics to yoga outcomes for stress resilience
Stanford researchers are growing brain organoids, exposing them to cortisol, and mapping results back to genomic data from children in the Puerto Rico yoga/mindfulness trial to identify genes that protect against stress.
"We can look at treatment response for the yoga and mindfulness preventive intervention and for the cue center therapy — bringing more light into the biology of resilience."
From mini-brains in a dish to school yoga: a multi-level study on stress and resilience genes
The study bridges molecular genetics to yoga interventions — growing brain organoids exposed to cortisol, analyzing genomes, and mapping those findings to thousands of Puerto Rico schoolchildren in yoga programs.
"You can bridge from molecular genetics all the way up to yoga in school children in Puerto Rico. It's the first time on this podcast someone has discussed a study at this scale."
