10 Surprising Facts About How Our Brains Work

10 Surprising Facts About How Our Brains Work

1. Your brain does creative work better when you’re tired

2. Stress can change the size of your brain (and make it smaller).

3. It is literally impossible for our brains to multi-task.

4. Naps improve your brain’s day to day performance.

5. Your vision trumps (prevails, dominates) all other senses.

Despite being one of our five main senses, vision seems to take precedence over the others:

Hear a piece of information, and three days later you’ll remember 10 percent of it. Add a picture and you’ll remember 65 percent.

Pictures beat text as well, in part because reading is so inefficient for us. Our brain sees words as lots of tiny pictures, and we have to identify certain features in the letters to be able to read them. That takes time.

In fact, vision is so powerful that the best wine tasters in the world have been known to describe a dyed white wine as a red.

Not only is it surprising that we rely on our vision so much, but it actually isn’t even that good! Take this fact, for instance:

Our brain is doing all this guessing because it doesn’t know where things are. In a three-dimensional world, the light actually falls on our retina in a two-dimensional fashion. So our brain approximates viewable image.

6. Introversion and extroversion come from different wiring in the brain.

I just recently realized that introversion and extroversion are not actually related to how outgoing or shy we are, but rather how our brains recharge.

Here’s how the brains of introverts and extroverts differ:

Research has actually found that there is a difference in the brains of extroverted and introverted people in terms of how we process rewards and how our genetic makeup differs. For extroverts, their brains respond more strongly when a gamble pays off. Part of this is simply genetic, but it’s partly the difference of their dopamine systems as well.

An experiment that had people take gambles while in a brain scanner found the following:

When the gambles they took paid off, the more extroverted group showed a stronger response in two crucial brain regions: the amygdala and the nucleus accumbens.

The nucleus accumbens is part of the dopamine system, which affects how we learn, and is generally known for motivating us to search for rewards. The difference in the dopamine system in the extrovert’s brain tends to push them towards seeking out novelty, taking risks and enjoying unfamiliar or surprising situations more than others. The amygdala is responsible for processing emotional stimuli, which gives extroverts that rush of excitement when they try something highly stimulating which might overwhelm an introvert.

More research has actually shown that the difference comes from how introverts and extroverts process stimuli. That is, the stimulation coming into our brains is processed differently depending on your personality. For extroverts, the pathway is much shorter. It runs through an area where taste, touch, visual and auditory sensory processing takes place. For introverts, stimuli runs through a long, complicated pathway in areas of the brain associated with remembering, planning and solving problems.

7. We tend to like people who make mistakes more; Apparently, making mistakes actually makes us more likable, due to something called the Pratfall Effect.

Kevan Lee recently explained how this works on the Buffer blog:

Those who never make mistakes are perceived as less likeable than those who commit the occasional faux pas. Messing up draws people closer to you, makes you more human. Perfection creates distance and an unattractive air of invincibility. Those of us with flaws win out every time.

This theory was tested by psychologist Elliot Aronson. In his test, he asked participants to listen to recordings of people answering a quiz. Select recordings included the sound of the person knocking over a cup of coffee. When participants were asked to rate the quizzers on likability, the coffee-spill group came out on top.

So this is why we tend to dislike people who seem perfect! And now we know that making minor mistakes isn’t the worst thing in the world, in fact, it can work in our favor.

8. Meditation can rewire your brain for the better; Here’s another one that really surprised me. I thought meditation was only good for improving focus and helping me to stay calm throughout the day, but it actually has a whole bunch of great benefits.

Here are a few examples:

Less anxiety - This point is pretty technical, but it’s really interesting. The more we meditate, the less anxiety we have, and it turns out this is because we’re actually loosening the connections of particular neural pathways. This sounds bad, but it’s not.

What happens without meditation is that there’s a section of our brains that’s sometimes called the Me Center (it’s technically the medial prefrontal cortex). This is the part that processes information relating to ourselves and our experiences. Normally the neural pathways from the bodily sensation and fear centers of the brain to the Me Center are really strong. When you experience a scary or upsetting sensation, it triggers a strong reaction in your Me Center, making you feel scared and under attack.

Here is how anxiety and agitation decreases with just a 20 minute meditation session:

When we meditate, especially when we are just getting started with meditation, we weaken this neural connection. This means that we don’t react as strongly to sensations that might have once lit up our Me Centers. As we weaken this connection, we simultaneously strengthen the connection between what’s known as our Assessment Center (the part of our brains known for reasoning) and our bodily sensation and fear centers. So when we experience scary or upsetting sensations, we can more easily look at them rationally. Here’s a good example:

For example, when you experience pain, rather than becoming anxious and assuming it means something is wrong with you, you can watch the pain rise and fall without becoming ensnared (captured) in a story about what it might mean.

Researchers at Leiden University in the Netherlands studied both focused-attention and open-monitoring mediation to see if there was any improvement in creativity afterwards. They found that people who practiced focused-attention meditation did not show any obvious signs of improvement in the creativity task following their meditation. For those who did open-monitoring meditation, however, they performed better on a task that asked them to come up with new ideas.

One of the things meditation has been linked to is improving rapid memory recall. Catherine Kerr, a researcher at the Martinos Center for Biomedical Imaging and the Osher Research Center found that people who practiced mindful meditation were able to adjust the brain wave that screens out distractions and increase their productivity more quickly that those that did not meditate. She said that this ability to ignore distractions could explain “their superior ability to rapidly remember and incorporate new facts.” This seems to be very similar to the power of being exposed to new situations that will also dramatically improve our memory of things.

Meditation has also been linked to increasing compassion, decreasing stress, improving memory skills and even increasing the amount of gray matter in the brain.

9. Exercise can reorganize the brain and boost your willpower; Sure, exercise is good for your body, but what about your brain? Well apparently there’s a link between exercise and mental alertness, in a similar way that happiness and exercise are related.

A lifetime of exercise can result in a sometimes astonishing elevation in cognitive performance, compared with those who are sedentary (sitting). Exercisers outperform couch potatoes in tests that measure long-term memory, reasoning, attention, problem-solving, even so-called fluid-intelligence tasks.

Of course, exercise can also make us happier, as we’ve explored before: If you start exercising, your brain recognizes this as a moment of stress. As your heart pressure increases, the brain thinks you are either fighting the enemy or fleeing from it. To protect yourself and your brain from stress, you release a protein called BDNF (Brain-Derived Neurotrophic Factor). This BDNF has a protective and also reparative element to your memory neurons and acts as a reset switch. That’s why we often feel so at ease and things are clear after exercising and eventually happy.

At the same time, endorphins, another chemical to fight stress, are released in your brain. The main purpose of endorphins:

These endorphins tend to minimize the discomfort of exercise, block the feeling of pain and are even associated with a feeling of euphoria.

10. You can make your brain think time is going slowly by doing new things