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Complex Chronic Illness, High Sensitivity, Undermethylation, Safety, Limbic System Retraining & the Vagus Nerve If you've been working very hard to heal and still feel stuck, I made this episode for you. I also made it for practitioners who wonder whether they're overwhelming some patients with too much information, too many protocols, and too many steps. I share my own story of perfectionism during my illness, who tends to be vulnerable to this pattern, how it affects the whole family, and the tools that help the body and mind feel safe enough to heal. Chapters
Full transcript linked below. Resources mentioned:
Until next time, Courtney Dr. Courtney Snyder MD is a holistic and functional psychiatrist for children and adults. Full Transcript...
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The Intersection Between Complex Illness, Brain Symptoms and the “Vagal-Limbic-Mast Cell Trifecta” in Multisystem Conditions Like Fibromyalgia, Chronic Fatigue (ME), CIRS, MCAS, POTS, Multiple Chemical Sensitivity, EHS, Mold, Lyme, Coinfections & Long COVID In this episode, I have the pleasure of speaking with Dr. Neil Nathan about the intersection between brain symptoms and complex illness. Dr. Nathan has practiced medicine for over 50 years. He is one of the leading experts in complex chronic illness and mold toxicity — author of the bestselling Toxic: Heal Your Body from Mold Toxicity, Lyme Disease, Multiple Chemical Sensitivity, and Chronic Environmental Illness and The Sensitive Patient's Healing Guide. I am grateful to call Dr. Nathan a mentor and colleague. His pioneering work has been responsible for my healing from chronic illness, as well as that of many patients I've treated. Together, we co-lead a small peer group (within the larger mentoring group he provides with Marie Matheson, ND), supporting practitioners who treat those with complex chronic illness. In this episode we discuss: 03:43 – Dr. Nathan’s path to understanding complex illness 11:20 – Why complex illness is rising and underrecognized 19:30 – Why new medical ideas take decades to reach patients 23:15 – Mold, Lyme, and long-COVID: the “big three” root causes 25:58 – The limbic-vagal-mast cell “trifecta” 30:31 – Are some people born more vulnerable? 44:39 – The risk in “just do limbic retraining” advice 47:35 - Biochemical contributors 49:26 – Structural root: jaw and cervical instability 53:58 – Differentiating Between Mold, Lyme & Long-COVID 58:49 – A message of hope, and where to learn more You can find Dr. Nathan’s books, consultations and mentoring program through his website at neilnathanmd.com. If you’d like to help get this information out into the world, please consider liking, sharing, or commenting. Until next time, Courtney Courtney Snyder MD Dr. Courtney Snyder MD is a holistic and functional child and adult psychiatrist and host of the Holistic Psychiatry Podcast and can be found at courtneysnydermd.com Medical Disclaimer This podcast is for educational purposes only and is not intended or implied to be a substitute for professional medical advice, diagnosis, or treatment. Consult your own physician for any medical issues you may be having. For full transcript... 
In this episode of the Holistic Psychiatry podcast, I discuss panic attacks, exploring their physiological, neurological, and emotional underpinnings. I discuss the heightened sensitivity of the brain’s alarm system, the role of neurotransmitters, hormonal influences, and the impact of inflammation and biotoxins. I’ll emphasize the importance of being curious about the nature of panic attacks..
Takeaways
Chapters 00:00 Understanding Panic Attacks 03:07 Physiological Factors Behind Panic Attacks 06:00 Neurotransmitters and Panic Disorder 08:52 The Role of Hormones in Panic Attacks 12:07 Inflammation and Panic Attacks 14:53 Mast Cells and Panic Responses 18:06 Biotoxins and Their Impact on Panic 21:00 Limbic System Dysfunction and Panic 24:11 The Autonomic Nervous System’s Role 26:45 Emotional Stressors and Panic Attacks As always, I welcome your thoughts and questions. Until next time, Courtney
In this episode, I explore mold-related illness, with a particular focus on mold toxicity and mold colonization.
I discuss:
In the next episode, I’ll review research exploring the connection between mold and brain-related conditions, and address the question: “Can mold enter the brain, even in individuals who are not immunocompromised?” It’s important to recognize that mold toxicity rarely occurs in isolation. It often contributes to or exacerbates other underlying conditions, such as mast cell activation, electromagnetic hypersensitivity, multiple chemical sensitivity, pyrrole disorder, copper–zinc imbalance, low methylation, and increased susceptibility to microbial infections or autoimmunity. As always, I welcome your thoughts and questions. Until next time, Courtney
The impact of our early attachment experience on the development of our limbic system, autonomic nervous system, and right and left brain differentiation.
Lately, I’ve been reflecting on the growing use of the term “dysregulated.” It’s a powerful word that captures what happens when we struggle to find calm in the body and brain after facing stress. When we talk about nervous system regulation, it’s easy to forget that its foundation is mostly laid down in the earliest years of life. Even though we don’t consciously remember those first experiences, they continue to shape our patterns and responses well into adulthood. The encouraging part is this: even if our early attachment experiences weren’t ideal, it’s absolutely possible to move toward greater attachment security. This shift allows us to experience healthier emotional regulation, more positive beliefs about ourselves and others, and stronger, more connected relationships. In this episode, I explore:
For me, this conversation is never about placing blame on parents- it’s about understanding the deep influence of those early years, which are arguably the most important time in our lives. It’s also a reminder that it’s never too late to become a more responsive and compassionate caregiver to ourselves. If you have a specific situation, concern or question that you would like me to react to in a future newsletter/episode, please email that to [email protected]. Names will never be shared. Until next time, Courtney 
Art teaches us to trust the process, roll with uncertainty, know that the answers will present themselves when we’re not looking so hard.
This past weekend, someone asked if I’d read Big Magic: Creative Living Beyond Fear by Elizabeth Gilbert. With my life feeling a bit stagnant, I took it as a sign from the universe. As I dive into the book, I’m reminded how crucial creativity was in my own healing journey. Exploring the creative process awakened my then dormant right brain, providing both the spark and the fuel when I felt depleted. Through collage and writing, creativity connected me to life's mystery and taught me not only to navigate uncertainty but to embrace it. Like any mental process, if we don't use it—and its neuronal pathways—we lose it. This post, shared from a year ago, is for anyone, like me, who might need a creative nudge or boost… 
Amygdala, RCCX Theory, CAPS Profile & 'Wired For Danger," Neuroplasticity, MCAS, EHS, CFS, POTS, CIRS, Mold Toxicity, Limbic System Retraining Programs For Adults & Children
Our limbic system, often referred to as the "lizard brain," plays a critical role in keeping us safe. However, when it’s overactive, it can make us feel perpetually unsafe. In a previous discussion, I explored how the autonomic nervous system (ANS) triggers fight, flight or shutdown responses when we sense danger. Although the ANS operates mainly outside the brain, it communicates closely with the limbic system. In this newsletter, I’ll cover:
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Courtney Snyder, MDFor anyone experiencing brain symptoms. This blog (and newsletter) is your guide to demystifying root causes and learning about surprising paths to healing. From a holistic - functional adult and child psychiatrist dedicated to helping people heal and thrive. Categories
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