Part 4: The Functional Neurology Files: Memory, Trauma & Healing with Shawn Ryan- Episode 147

In this compelling episode, Dr. Michael  Bagnell take a deep dive into dementia and Alzheimer’s disease, breaking down long-standing myths and revealing what modern neuroscience is teaching us about prevention, progression, and brain resilience. The discussion begins by clarifying that Alzheimer’s is NOT caused by aluminum, dispelling outdated fears, while emphasizing that toxins, inflammation, and lifestyle choices still matter when it comes to long-term brain health.

A major focus of this conversation is the powerful link between blood sugar dysregulation and Alzheimer’s, often referred to in research as “Type 3 Diabetes.” Dr. Bagnell explains how chronic blood sugar imbalance creates inflammation in the brain, dramatically increasing the risk of cognitive decline—especially in women, who are statistically more vulnerable. The takeaway is clear and urgent: controlling blood sugar may be one of the most effective ways to reduce Alzheimer’s risk.

The episode also explores the often-overlooked role of brain injuries and concussions, even a single impact, in increasing the likelihood of Parkinson’s, dementia, and Alzheimer’s later in life. Dr. Bagnell shares a deeply personal story about his father, illustrating how unrecognized traumatic brain injury can shape emotional health, behavior, memory loss, and early dementia. This segment powerfully humanizes the science and highlights why brain inflammation and injury must be taken seriously.

Listeners will gain clarity around memory concerns as well. Forgetting words or losing your train of thought is NOT automatically Alzheimer’s—it is often a sign of working memory stress, not neurodegeneration. While many people turn to crossword puzzles and Sudoku, Dr. Bagnell explains that these offer limited benefit compared to one proven intervention: movement. Research shows that physical movement activates more of the brain than passive cognitive tasks, making exercise one of the strongest protectors of brain health.

The conversation expands into neuroplasticity, emphasizing that movement is the doorway to brain change. Activities that are new, challenging, engaging, and even frustrating stimulate dopamine, the chemical that fuels learning and adaptation. Whether it’s learning a new skill, coordinated movement, or combining physical activity with cognitive tasks, these experiences retrain and strengthen the brain far more effectively than passive mental exercises.

Dr. Bagnell also addresses the growing neurological impact of long COVID, explaining how neuroinflammation and brainstem dysfunction can lead to brain fog, heart rate instability, balance issues, and dysautonomia. He stresses that, just like a physical injury, the brain may require rehabilitation, not just medication. This insight offers hope for those struggling with persistent post-COVID symptoms.

The episode then unpacks addiction and dopamine, revealing how social media, gambling, substances, and high-stimulation environments hijack the brain’s reward system. Addiction, Dr. Bagnell explains, is less about the substance itself and more about dopamine-driven desire and pursuit. Understanding this mechanism opens the door to more effective healing and recovery strategies.

In a holistic close, the conversation moves beyond biology into the deeper dimensions of healing—the body, the soul, and the spirit. Dr. Bagnell explains why treating only the physical body leaves healing incomplete and why emotional and spiritual health play a critical role in true recovery. The episode concludes with a fascinating discussion on dolphin-assisted therapy, wher