You can grow new brain cells. Here's how | Sandrine Thuret | TED

Neurogenesis: Can Adults Grow New Nerve Cells?

In this talk, Sandrine Thuret discusses the topic of neurogenesis and whether adults can grow new nerve cells. She explains the importance of neurogenesis for learning, memory, mood, and emotion. She also explores the link between neurogenesis and depression.

Neurogenesis in the Adult Brain

• Neurogenesis is the phenomenon of generating new nerve cells in the adult brain.

• The hippocampus is one of the unique structures in the adult brain where new neurons can be generated.

• Approximately 700 new neurons are produced per day in the hippocampus of a human brain.

• These new neurons play a role in learning, memory, and spatial recognition.

Importance of New Neurons

• Blocking neurogenesis in the hippocampus can impair certain memory abilities, especially spatial recognition.

• New neurons contribute to memory quality by differentiating similar memories and adding time to our memory.

Neurogenesis and Depression

• Animal models have shown that decreased neurogenesis is associated with depression.

• Antidepressants increase neurogenesis and alleviate symptoms of depression.

• Blocking neurogenesis can reduce the efficacy of antidepressant treatment.

Potential Applications

• Enhancing neurogenesis could improve memory formation, mood, and prevent age-related cognitive decline or stress-related decline.

Controlling Neurogenesis

• Certain behaviors and activities can influence neurogenesis.

• Learning increases neurogenesis.

• Stress decreases neurogenesis.

Conclusion

Sandrine Thuret concludes by emphasizing the importance of neurogenesis for memory and mood, and the potential to control neurogenesis through various behaviors and activities.

The transcript provided does not include specific timestamps for each bullet point. However, I have associated the bullet points with the closest available timestamps in order to provide a structured summary.

New Section

This section discusses the impact of various factors on neurogenesis, including sex, aging, running, and diet.

Factors Affecting Neurogenesis

• Sex: Sex can increase the production of new neurons.

• Aging: Neurogenesis decreases as we get older but still occurs.

• Running: Running has been shown to have a positive impact on neurogenesis.

• Diet: What we eat can affect the production of new neurons in the hippocampus.

• Calorie restriction (20-30%) increases neurogenesis.

• Intermittent fasting increases neurogenesis.

• Flavonoids found in dark chocolate or blueberries increase neurogenesis.

• Omega-3 fatty acids found in fatty fish like salmon increase neurogenesis.

• High saturated fat diets have a negative impact on neurogenesis.

• Ethanol intake decreases neurogenesis, while resveratrol in red wine promotes survival of new neurons.

New Section

This section highlights how activity and diet affect neurogenesis and mental health.

Impact of Activity and Diet on Mental Health

• Activity: Activity impacts neurogenesis but is not the only factor influencing mental health.

• Diet: The diet modulates memory, mood, and neurogenesis in the same direction:

• Calorie restriction improves memory capacity.

• High-fat diets exacerbate symptoms of depression.

• Omega-3 fatty acids help decrease symptoms of depression.

New Section

The influence of diet goes beyond what you eat; it also includes food texture, timing, and quantity.

Influence of Diet on Neurogenesis

• Food Texture: Soft diets impair neurogenesis, while food requiring chewing or crunchy food promotes it.

• Timing and Quantity: When and how much you eat also affect neurogenesis.

New Section

The importance of understanding the function of new neurons and finding ways to protect neurogenesis.

Future Directions in Neurogenesis Research

• Function of New Neurons: Further research is needed to understand the function of new neurons.

• Protecting Neurogenesis: Efforts are required to find ways to protect neurogenesis in patients with neurological conditions.

New Section

Concluding remarks on the impact of diet and personal responsibility for neurogenesis.

Conclusion

• Personal Responsibility: Individuals have control over their own neurogenesis through lifestyle choices.

• Eating blueberries may be beneficial due to their impact on neurogenesis.