LegendaryLife Blog

Brains are as quick as they are beautiful.

When I grew-up, we were taught a few things about the brain, some of which have since been proven wrong.

1. We will only be born with a certain number of neurons which are not replaced as they die. FALSE!
2. Old people can’t learn new things (lead to the expression that you can’t teach an old dog new tricks). FALSE!
3. Our brains cannot change from their genetic potential. FALSE!

Why these past truths are now false ones

It was once believed that all the neurons that developed within our brains when we were infants was all we would have for the rest of our lives, then, a little over a year ago, I read a report that scientists discovered that our brains continue to make new neurons, albeit at a slower pace as we get older, but new ones never the less. That being said, it doesn’t mean you can go get hammered every weekend and have new ones to replace the ones you killed by Monday. Our body produces new skin, bone, cartilage, muscle cells on an almost continual basis, our brains are no different but like these cells, their require stimuli of one type or another to maintain their youthful vigor.

Yes, old people can learn new things, it just takes a little longer as the brain isn’t as quick as it once was due to being increasingly hard wired but just because it takes longer to learn something, doesn’t mean it’s impossible! Our brains actually learn differently as we age. I saw a report once that compared the brains of people who learned two languages when they were young with those who learned their second tongue after reaching adulthood. What they showed was that the brain actually “seeked” the words for their second language in a totally different area for those who learned as an adult vs intertwined when both languages were learned at a young age.

Genetically, we are born with a set of limits, although not impossible, it’s highly improbable that a person born with down syndrome will develop a mental capacity rivaling Einstein but recent discoveries in gene and epigenes suggests that lifestyle has a direct impact on gene expression. In other words, if you change your environment, genes that favor your survival in it will increase in dominance while the ones you were born with will go the other way. I saw a study that showed two twins, born with the same genetic profile, at a later age, one had cancer while the other didn’t… why? Well, after genetic testing, they found-out that although these twins were born as genetic duplicates in every way, their genes, through time, changed to that of two completely different individuals with different gene expressions. AMAZING!

What is true about our brains

As we age, our brains go from acting like sponges to something more closely acting like that of a soggy chunk of wood… it just takes longer for the neuron connections to occur and more stimuli to make their bonds stronger and more permanent. Our brains do change dramatically throughout the different states of life, so they do change, but not as quickly and spontaneously as that of a teenager or infant when you are a senior citizen.

What can you do to keep your brain in tip-top shape?

You want strong muscles, you exercise… our brains are no different. If you want to stay sharp till you are a senior citizen, you need to adopt a lifestyle that will keep not only your brain but entire body as youthful as possible. Don’t drink alcohol, exercise regularly as it improves overall blood flow, challenge yourself constantly both physically and mentally… and don’t forget to eat extremely well all the time.

… but how fast can your brain really rewire itself?

A few seconds! According to a study released by the Journal of Neuroscience, it takes our brain just a few seconds to adapt to new stimulus. The study was pretty straight forward, once the person’s blind spot was figured-out and a patch was put over one eye, they put the picture of a square right next to it, within seconds, the square would morph into that of a rectangle.

The team concludes that the neurons which would normally fill the blind spot using data from the patched eye compensated by stealing data from neighbouring neurons that were “seeing” the square, making it appear like a rectangle.

The Bottom Line

Lifestyle dictates to a large extent what your brain will act like as you age.

Buzvia: Blindspot shows brain rewiring in an instant, Journal of Neuroscience