About this video

• Video Title: Neuroscientist: The Only Proven Way to Stop Cognitive Decline has Been Discovered
• Channel: Thomas DeLauer
• Speakers: Thomas DeLauer, Dr. Tommy Wood
• Duration: 01:48:37

Overview

This video features a discussion between Thomas DeLauer and neuroscientist Dr. Tommy Wood, exploring various aspects of brain health, cognitive function, and the factors that influence them. They cover topics ranging from metabolic and neuroscience approaches to brain health, the energy demands of the brain, the role of diet and micronutrients, the impact of stress and sleep, and how lifestyle choices affect cognitive decline.

Key takeaways

• Brain's Prediction Machine: The brain operates as a prediction machine, and discrepancies between predictions and reality drive neuroplasticity. Novelty is crucial for stimulating the brain and preventing its shrinkage due to routine.
• Metabolic vs. Neuroscience Approach: The importance of both metabolic and neuroscience optimization for brain health is discussed, with the optimal starting point depending on an individual's current health status. Poor metabolic health can impair vascular function and brain energetics.
• Energy Demand and Supply: The brain requires energy (glucose or ketones) for function. Cognitive demand plays a role in energy uptake, and a lack of demand can lead to functional decline. Ketones may be a more efficient energy source for the brain, especially in cases of cognitive decline.
• Micronutrients and Brain Health: Key micronutrients for brain health include Vitamin D, Omega-3 fatty acids, B vitamins (especially for methylation and homocysteine levels), iron, magnesium, and zinc. Antioxidant polyphenols found in berries and other colorful foods are also beneficial.
• Exercise and Brain Benefits: Exercise, particularly high-intensity interval training (HIIT), can promote brain health by increasing lactate production, which in turn stimulates BDNF (Brain-Derived Neurotrophic Factor). Exercise also contributes to cross-stressor adaptation, making the body more resilient to various stressors.
• Stress, Recovery, and Sleep: The perception of stress significantly impacts physiology. Adequate recovery, including sleep, is crucial for adaptation. Over-optimizing sleep can sometimes be counterproductive, and focusing on overall energy availability and managing total allostatic load is important.
• Cognitive Function Changes with Age: While some cognitive functions like processing speed may decline with age, crystallized intelligence and wisdom tend to improve, allowing for better integration and application of learned information.

The transcript mentions myelin in the context of white matter in the brain. It explains that white matter consists of axons, which are the connections of neurons, and these axons are wrapped in a fatty sheath called myelin. This myelin sheath allows neurons to conduct information much faster, playing a crucial role in processing speed and aspects of executive function. The health and structure of this white matter, including the myelin sheath, are linked to cognitive function and decline.

"So white white matter is fascinating particularly as humans um because one of the reasons why we have the the complex brains that we do is we have more white matter than any other species. So um if you think about a brain is kind of this big wrinkly sort of squishy pinkish gray thing and that outer wrinkly tissue is the cortex. That's the gray matter. And there's some gray matter like deep inside as well in between and about at least 60% of the human brain is is white matter. So white matter is where the axons you know the connections of the neurons are wrapped in a fatty sheath called myelin. Um and that allows allows those neurons to conduct information much faster. Um so uh connections between different parts of the brain as well as between the brain and the body. um really important for you know fast decision- making, processing speed, aspects of executive function um as well as you know sort of the the the complex functions of like our prefrontal cortex really dependent on white matter and you see that uh changes in white matter as we get older."