Episode #19 The Gut-Brain Axis - How Your Brain and Body Communicate with John Cryan, PhD

05/25/21 • 33 min

2 Listeners

At some point in your life, you’ve likely been told to “trust your gut” when making a decision or experienced a “gut reaction” to external stimuli. Medical research indicates that these gut idioms might just be right about the role of the gut! It turns out that the gut microbiome communicates with the brain and can potentially influence our behavior. Researchers have named this link the gut-brain axis and it provides a robust communication network between the gastrointestinal tract and central nervous system. At its core is the enteric nervous system which has more than 5 times the number of neurons in our brains and trillions of microorganisms. This system has been dubbed the “second brain” or the “gut-brain” for its influence on our overall physical and mental health.

Our guest today is neuroscientist John Cryan, PhD. Professor Cryan investigates how the gut microbiome affects the mammalian brain. He is Chair of the Department of Anatomy and Neuroscience and Principal Investigator in the Alimentary Pharmabiotic Center at University College of Cork (Ireland). Dr. Cryan’s research has demonstrated the bi-directional relationship between our gut and emotional and mental wellbeing.

In this episode Dr. Weil, Dr. Maizes, and Professor Cryan discuss the role the vagus nerve plays in regulating homeostasis, how chemicals released in the gut send signals to the brain, how maternal bacteria influence our early development, the link between sleep and gut health, and how diet can influence this complex system.

Previous Episode

Episode #18 A Kingdom of Their Own - How Fungi Shape Our World with Merlin Sheldrake

Fungi have shaped our world for billions of years and are present in us, on us, and in nearly every environment. They are one of the oldest lifeforms found on earth and throughout time formed landscapes and helped to give rise to the plant and animal kingdoms. These organisms forge mutually beneficial life-sustaining partnerships with us and can teach us a great deal about whole systems thinking.

Our guest is Merlin Sheldrake, biologist and best-selling author of Entangled Life: How Fungi Make Our Worlds, Change Our Minds, and Shape Our Futures.

Merlin has spent his career investigating the role fungi play in supporting life on our planet, including the relationships between humans and fungi. Merlin posits, “All plants depend on fungi to survive, which means that all the food we eat, and the health of the soil in which it grows, depends on fungal activity. Fungal medicines and foods have played pivotal roles in human health for an unknowably long time, and have been responsible for some of the most dramatic breakthroughs in modern medicine.”

In this episode, Dr. Weil, Dr. Maizes, and Sheldrake discuss how the symbiotic nature of fungi challenges our perception of self. Dr. Maizes discusses their use in mental health and asks why mushrooms are popular in some cultures and avoided in others. Dr. Weil describes the medicinal and culinary use of fungi. Sheldrake discusses significant fungal properties and shares the many benefits they bring to humankind.

Next Episode

Episode #20 How Psychedelics Will Change the Future of Mental Health Treatment with Ronan Levy

Psychedelics, such as ketamine, MDMA, psilocybin, and LSD have been tightly controlled and highly debated substances for decades, but after several years of clinical trials, the FDA has recently awarded both MDMA and psilocybin, when used in conjunction with psychotherapy, with breakthrough status for the research of challenging mental health disorders, like PTSD.

The breakthrough status designation means that the FDA will expedite the review of the research. Mental health advocates are keen to open these treatments to a wider demographic of patients. And, it’s important to note that there’s been a long tradition of psychedelic use as a healing practice among cultures across the world.

So, is modern society ready to embrace psychedelics? Newly passed local laws show that it’s becoming more widely accepted. Legal access to psilocybin is already available in parts of the US and Canada.

Joining us on this episode is Ronan Levy, co-founder and Executive Chairman of Field Trip Psychedelics a new company that is treating patients who have mental health diagnoses with ketamine-assisted psychotherapy.

Together, Dr. Weil, Dr. Maizes, and Levy discuss important aspects of psychedelic treatment. Dr. Weil defines psychedelic-assisted therapy and how it works. Dr. Maizes raises the questions, “What should be considered when applying these treatments?” and “When will it be made available to patients?” Levy describes the current regulations and laws around the substances in the US and Canada, the treatment protocols at his clinic, and what the future holds for patients seeking psychedelic-assisted therapy.