The hippocampi, a pair of thumb-sized structures nestled within the temporal lobes of your brain, play a pivotal role in learning and memory. Often referred to by their Greek name, “hippocampus,” meaning “sea horse,” these structures are crucial for memory formation. They act as gateways, processing long-term memories before they are stored throughout the brain. When healthy, the hippocampi facilitate learning and memory retention. However, shrinkage or volume loss in these areas is linked to memory issues, cognitive decline, and severe conditions like Alzheimer’s disease and other dementias.
Emerging brain-imaging research highlights another critical function of the hippocampi: they house stem cells that generate new neurons, allowing them to evolve throughout adulthood. Studies suggest that humans can produce up to 700 new hippocampal cells daily, provided they are in a nourishing environment. Therefore, understanding what nourishes and what shrinks your hippocampi is essential.
3 Ways to Nourish Your Hippocampi
1. Get Moving
Aerobic exercise is a powerful tool for increasing hippocampal volume. Research published in the British Journal of Sports Medicine indicates that getting your heart pumping through activities like walking can enhance memory and learning by promoting the growth of new hippocampal cells. Even leisurely walking has been shown to increase hippocampal volume in older women, offering a simple yet effective way to protect your brain.
2. Engage in Mental Exercise
Just as physical exercise strengthens your body, mental exercise fortifies your brain. A 2020 study found that playing 3D video games can improve hippocampal memory in young adults, with benefits lasting up to four weeks post-trial. Other mental workouts, such as memorizing poetry or prose, have been shown to enhance memory and metabolic function in the hippocampi. Incorporate these practices into your daily routine by memorizing grocery lists, song lyrics, or poems instead of relying on digital devices.
3. Learn Something New
Learning new skills or subjects is one of the most effective ways to boost hippocampal health. Intensive learning, such as attending law or medical school, has been shown to enlarge the hippocampi in just 14 weeks. Additionally, learning to play a musical instrument can increase hippocampal volume and enhance neuroplasticity, the brain’s ability to adapt and change. So, whether it’s picking up a guitar or learning a new language, your hippocampi will benefit.
3 Things That Shrink Your Hippocampi
1. Chronic Stress
Chronic stress is detrimental to both physical health and the hippocampi. Prolonged exposure to stress hormones like cortisol can kill new cells in the hippocampi, leading to shrinkage. This is concerning as midlife stress is associated with cognitive decline later in life. To combat this, incorporate stress-reduction techniques such as deep breathing, meditation, or tai chi into your daily routine.
2. High Blood Sugar Levels
Elevated blood sugar levels, common in Type 1 and Type 2 diabetes, are linked to smaller hippocampi. Even prediabetes and mildly elevated blood sugar can contribute to hippocampal shrinkage and memory problems. To prevent this, maintain balanced blood sugar levels by eating protein with every meal and avoiding high-glycemic foods.
3. Low Omega-3 Fatty Acids
Omega-3 fatty acids, particularly EPA and DHA, are vital for brain health. Low levels of these fatty acids are associated with reduced blood flow to the brain, including the hippocampi, which can predict future cognitive decline. Increasing your intake of high-quality omega-3 supplements can help maintain hippocampal size and cognitive function.
The Takeaway
To improve and protect your memory, focus on nourishing your hippocampi with these simple daily habits. By incorporating physical and mental exercises, learning new skills, managing stress, maintaining healthy blood sugar levels, and ensuring adequate omega-3 intake, you can support your brain’s health and longevity. You’re worth the effort.
