How To Keep Your Brain Healthy At Any Age #161
Dr. Rangan Chatterjee hosts a compilation episode on brain health, featuring neuroscientists discussing neurogenesis, dementia prevention, and the profound impact of music, language, movement, touch, and diet on brain performance and longevity.
Deep Dive Analysis
10 Topic Outline
Introduction to Brain Health and Compilation Episode
Neurogenesis: Forming New Brain Cells in Adults
Dementia Prevention: Lifestyle's Role in Brain Health
Music and Language Learning: Brain Engagement and Flow State
Movement and Exercise: Benefits for Brain Function and Neurogenesis
The Importance of Human Touch for Brain Development
Diet and Brain Health: Mediterranean Diet, Flavonoids, and Neurogenesis
Calorie Restriction and Intermittent Fasting for Brain Health
Brain Plasticity and Investing in Future Brain Health
Practical Tips for Enhancing Brain Health
7 Key Concepts
Neurogenesis
Neurogenesis is the production or birth of new neurons. While once thought to stop after fetal development, it is now known to occur in restricted areas of the adult brain, particularly the hippocampus.
Hippocampus
The hippocampus is a specific area of the brain vital for learning, memory, mood, and emotions. It is one of the restricted areas where new neurons are produced in adults through neurogenesis.
Cognitive Reserve
Cognitive reserve refers to the brain's resilience and ability to fend off pathology and insults for many years. This reserve is largely based on lifestyle choices and can delay the onset of dementia symptoms.
Flow State (Alpha Waves)
A flow state is a condition of being focused, awake, and calm, characterized by detectable alpha waves in the brain. In this state, the brain is less active and more efficient, often experienced during activities like playing music or peak athletic performance.
C-Tactile Fibers
These are a class of slowly conducting, touch-sensitive nerve fibers found in the hairy skin of the body (not the glabra skin of the hands). They respond to gentle, pleasant stroking touch and play a fundamental role in the emotional quality of touch and the development of a sense of self.
Brain-Derived Neurotrophic Factor (BDNF)
BDNF is a molecule released by the brain itself, particularly during exercise. It acts as a 'miracle growth' for the brain, helping to maintain blood flow and promoting overall brain health.
Pattern Separation
Pattern separation is a cognitive function that allows the brain to distinguish between similar experiences or memories. Studies suggest that both calorie restriction and intermittent fasting can improve this function in humans.
9 Questions Answered
Yes, a process called neurogenesis, the production of new neurons, occurs in the adult brain, particularly in the hippocampus, a region important for learning and memory.
No, dementia is not solely a disease of old age; the underlying pathology, such as Alzheimer's, can begin 30 years before symptoms appear, highlighting the importance of early preventive action.
Learning to play music engages many parts of the brain, creating left-right connections across the corpus callosum, and helps prevent brain areas from withering due to disuse, often inducing a beneficial 'flow state'.
Movement, especially walking, activates more of the brain, heightens senses, and helps the brain anticipate and generate possibilities, whereas sedentary lifestyles can leave the brain in 'first gear'.
Gentle, nurturing touch stimulates C-tactile nerve fibers in hairy skin, which are fundamental for healthy brain development, shaping a child's sense of self and identity, and its absence can lead to severe behavioral and psychological problems.
A healthy diet, like the Mediterranean diet, can preserve cognition, lower the onset of Alzheimer's, and directly increase neurogenesis, while a high-fat diet can reduce the production of new neurons.
Flavonoids, found in dark-skinned fruits like blueberries, strawberries, and grapes, can increase neurogenesis and improve blood flow to the brain, enhancing memory.
Both calorie restriction (eating 20-30% less daily) and intermittent fasting (e.g., 5-2 diet) have been shown in humans to improve pattern separation and increase levels of the 'longevity hormone' cloto.
No, the human brain possesses plasticity, meaning it can adapt and improve at any stage of life, and consistent healthy lifestyle choices in midlife or later can significantly impact future brain health.
12 Actionable Insights
1. Start Brain Health Early
Begin taking preemptive and preventive action for brain health in your 30s, 40s, and 50s, as dementia can start decades before symptoms appear. Consistency in these strategies is crucial, especially from midlife onwards, to predict better health for the rest of your life.
2. Prioritize Daily Movement
Increase your daily movement and ‘get vertical’ more often, as sitting all day can leave your brain in ‘first gear.’ Movement enhances brain activity, heightens senses, and stimulates the release of beneficial neurotrophic factors like BDNF, which acts as ‘miracle growth’ for the brain.
3. Adopt Mediterranean-Style Diet
Follow a plant-centric Mediterranean-style diet focusing on vegetables, fruits, grains, and legumes, using unrefined vegetable oils like extra virgin olive oil. This diet is associated with living longer, better, and a lower onset of Alzheimer’s disease, keeping brains looking years younger.
4. Embrace Nurturing Human Touch
Prioritize and increase nurturing, gentle physical touch in your life and with children, as it is a fundamental necessity for optimal brain development and shaping one’s sense of self. A lack of touch during development can have catastrophic long-term consequences.
5. Engage in Lifelong Learning
Actively learn new things, particularly music and languages, to engage different pathways and corners of your mind. This energy-consuming activity is a strong way to stave off dementia and helps the brain break out of ruts.
6. Cultivate Flow States
Find skills and habits that allow you to harness and channel flow states, characterized by being focused, awake, and calm. Learning music is specifically mentioned as a beneficial activity to achieve this alpha wave state, which makes the brain more efficient.
7. Consume Flavonoid-Rich Foods
Incorporate fruits with dark skins, such as blueberries, strawberries, and grapes, into your diet. Flavonoids found in these foods are shown to increase neurogenesis and improve memory and blood flow to the brain.
8. Consider Calorie Restriction or Intermittent Fasting
Practice either a daily calorie restriction of 20-30% or intermittent fasting (e.g., eating 600 kilocalories two days a week, like the 5-2 diet). Both methods have been shown to improve pattern separation and increase levels of the longevity hormone, cloto, in humans.
9. Prioritize Happiness and Relationships
Actively pursue happiness by engaging in relationships and crafts that bring you joy. Mental health issues like depression can lead to brain changes, so fostering happiness is one of the best things you can do for your brain.
10. Integrate More Walking
Make subtle changes to increase your daily steps, such as keeping comfortable shoes handy for lunchtime walks, setting alarms to take walking breaks every 25 minutes, parking further away, getting off public transport early, or choosing more distant shops for errands.
11. Reduce Unhealthy Fats & Red Meat
Make subtle but important changes in your diet by reducing or eliminating red meat and fried foods. This aligns with a Mediterranean-style diet which benefits brain health.
12. Engage Mentally Stimulating Activities
Challenge your brain with puzzles, read books, and try new or unusual activities. These forms of mental stimulation are beneficial for overall brain health.
7 Key Quotes
Alzheimer's disease is not like you just all of a sudden catch a cold. It's not like tomorrow you go to the doctor and boom, you have Alzheimer's disease. There's something that's been happening in your brain for a really, really long time that eventually leads to the symptoms.
Dr. Lisa Moscone
Your brain's like a walnut. There's a bridge in the middle. And music, hearing it, playing it, thinking about it, using your fingers to control it, seems to pull from the most corners of our mind.
Dr. Rahul Jandil
If you don't use it, you lose it. It will down-regulate. It will let wither certain corners of the brain if they're not actively engaged.
Dr. Rahul Jandil
The brain likes exercise because it is flesh. Don't clog the plumbing to your garden, because swaths of your garden will wither.
Dr. Rahul Jandil
Your healthy midlife is the best predictor of your health for the rest of your life. So this is the time to really start being consistent.
Dr. Lisa Moscone
For all the science, for all the complexity, which is really important, the actual take home intervention for society, for us as individuals is, we need to touch more, we need to, you know, you know, we need to stroke more, we need to, you know, give touch more priority in our lives.
Professor Francis McGlone
If you're a 50-year-old woman on a Mediterranean diet, your brain looks at least five years younger as compared to a woman who's also 50 years old, but who's been on a Western diet for most of her life.
Dr. Lisa Moscone
1 Protocols
Daily Movement for Brain Health
Shane O'Mara, Dr. Rahul Jandil, Host- Get vertical and stand up more often, especially if working at a desk.
- Wear comfortable shoes to facilitate walking throughout the day.
- Set an alarm to get up and walk around every 25 minutes if working at a computer.
- Park further away or get off public transport a few stops early to increase daily steps.
- Walk to a slightly further shop for lunch instead of the closest one.