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According to a survey from 2013, around 65 percent of Americans believe that we only use 10 percent of our brain.
But this is just a myth, according to an interview with neurologist Barry Gordon in Scientific American. He explained that the majority of the brain is almost always active.
The 10 percent myth was also debunked in a study publishedTrusted Source in Frontiers in Human Neuroscience.
One common brain imaging technique, called functional magnetic resonance imaging (fMRI), can measure activity in the brain while a person is performing different tasks.
Using this and similar methods, researchers show that most of our brain is in use most of the time, even when a person is performing a very simple action.
A lot of the brain is even active when a person is resting or sleeping.
The percentage of the brain in use at any given time varies from person to person. It also depends on what a person is doing or thinking about.
It’s not clear how this myth began, but there are several possible sources.
In an article published in a 1907 edition of the journal Science, psychologist and author William James argued that humans only use part of their mental resources. However, he did not specify a percentage.
The figure was referenced in Dale Carnegie’s 1936 book How to Win Friends and Influence People. The myth was described as something the author’s college professor used to say.
There is also a belief among scientistsTrusted Source that neurons make up around 10 percent of the brain’s cells. This may have contributed to the 10 percent myth.
The myth has been repeated in articles, TV programs, and films, which helps to explain why it is so widely believed.
Like any other organ, the brain is affected by a person’s lifestyle, diet, and the amount that they exercise.
To improve the health and function of the brain, a person can do the following things.
Eat a balanced diet
Eating well improves overall health and well-being. It also reduces the risk of developing health issues that may lead to dementia, including:
- cardiovascular disease
- midlife obesity
- type 2 diabetes
The following foods promote brain health:
- Fruits and vegetables with dark skins. Some are rich in vitamin E, such as spinach, broccoli, and blueberries. Others are rich in beta carotene, including red peppers and sweet potatoes. Vitamin E and beta carotene promote brain health.
- Oily fish. These types of fish, such as salmon, mackerel, and tuna, are rich in omega-3 fatty acids, which may support cognitive function.
- Walnuts and pecans. They are rich in antioxidants, which promote brain health.
There is a selection of walnuts and pecans available for purchase online.
Regular exercise also reduces the risk of health problems that may lead to dementia.
Cardiovascular activities, such as walking briskly for 30 minutes a day, can be enough to reduce the risk of brain function declining.
Other accessible and inexpensive options include:
- bike riding
Keep the brain active
The more a person uses their brain, the better their mental functions become. For this reason, brain training exercises are a good way to maintain overall brain health.
A recent study conducted over 10 years found that people who used brain training exercises reduced the risk of dementia by 29 percent.
The most effective training focused on increasing the brain’s speed and ability to process complex information quickly.
Alcohol and the brain
Long-term alcoholism can lead to a number of health problems, including brain damage.
It is not, however, as simple as saying that drinking alcohol kills brain cells — this is a myth. The reasons for this are complicated.
If a woman drinks too much alcohol while pregnant, it can affect the brain development of the fetus, and even cause fetal alcohol syndrome.
The brains of babies with this condition may be smaller and often contain fewer brain cells. This may lead to difficulties with learning and behavior.
Research suggestsTrusted Source that subliminal messages can provoke an emotional response in people unaware that they had received emotional stimulus. But can subliminal messages help a person to learn new things?
A studyTrusted Source published in Nature Communications found that hearing recordings of vocabulary when sleeping could improve a person’s ability to remember the words. This was only the case in people who had already studied the vocabulary.
Researchers noted that hearing information while asleep cannot help a person to learn new things. It may only improve recall of information learned earlier, while awake.
The human brain is covered in folds, commonly known as wrinkles. The dip in each fold is called the sulcus, and the raised part is called the gyrus.
Some people believe that a new wrinkle is formed every time a person learns something. This is not the case.
The brain starts to develop wrinkles before a person is born, and this process continues throughout childhood.
The brain is constantly making new connections and breaking old ones, even in adulthood.
Now that we have dispelled some commonly held myths, here are some facts about the brain.
The brain represents around 2 percent of a person’s weight but uses 20 percent of their oxygen and calories.
First established in 1945, scientists estimate that the brain is around 73 percent water.
Keeping the brain hydrated is important. Being dehydrated by as little as 2 percent may impair a person’s abilityTrusted Source to perform tasks that involve attention, memory, and motor skills.
Cholesterol is a type of fat that people often consider bad for their health.
It’s true that eating too much cholesterol is bad for the heart. However, many people are unaware that cholesterol plays a significant role in a person’s brain.
Without cholesterol, the cells in the brain would not survive.
Around 25 percent of the body’s cholesterol is contained within the brain cells.
Because of the organ’s complexity, scientists are still learning about the brain.
The notion that a person uses only 10 percent of their brain is a myth. fMRI scans show that even simple activities require almost all of the brain to be active.
While there is still a lot to learn about the brain, researchers continue to fill in the gaps between fact and fiction.
You can thank your brain for everything you feel and understand about yourself and the world. But how much do you truly know about the complex organ in your head?
If you’re like most people, some of the things you think about your brain may not be true at all. Let’s explore some common beliefs about the brain to find out if they’re true.
The idea that we only use 10 percent of our brain is deeply entrenched in popular culture and often stated as fact in books and movies. A 2013 study found that 65 percent of Americans believe this to be true.
It’s not entirely clear how it all started, but it’s more science fiction that fact.
Sure, some parts of your brain are working harder than others at any given time. But 90 percent of your brain isn’t useless filler. Magnetic resonance imaging shows that most of the human brain is active most of the time. In the course of a day, you use just about every part of your brain.
This doesn’t mean that you can’t improve your brain health. Your whole body is depending on your brain. Here’s how to give your brain the TLC it deserves:
A well-balanced diet improves overall health as well as brain health. Eating right reduces the risk of developing health conditions that can lead to dementia.
Foods that promote brain health include:
- olive oil
- fruits and vegetables high in vitamin E, such as blueberries, broccoli, and spinach
- fruits and vegetables high in beta carotene, such as spinach, red peppers, and sweet potatoes
- foods rich in antioxidants, such as walnuts and pecans
- omega-3 fatty acids that can be found in fish, such as salmon, mackerel, and albacore tuna
Exercise your body
Regular physical activity helps reduce the risk of health problems that can cause dementia.
Challenge your brain
Research indicates that activities like crossword puzzles, chess, and deep reading can lower your risk of memory problems. Even better is a mentally stimulating hobby that involves a social component, such as a book club.
Not all brains are wrinkled. In fact, most animals have fairly smooth brains. Some exceptions are primates, dolphins, elephants, and pigs, which also happen to be some of the more intelligent animals.
The human brain is exceptionally wrinkled. That’s probably why people conclude that we gain more wrinkles as we learn new things. But that’s not how we acquire brain wrinkles.
Your brain starts developing wrinkles before you’re even born. The wrinkling continues as your brain grows, until you’re about 18 months old.
Think of the wrinkles as folds. The crevices are called sulci and the raised areas are called gyri. The folds allow room for more gray matter inside your skull. It also decreases wiring length and improves overall cognitive functioning.
Human brains vary quite a bit, but there’s still a typical pattern to brain folds. Research shows that not having the major folds in the right places could cause some dysfunction.
Various studies suggest that subliminal messages might be able to:
- provoke an emotional response
- affect perception of effort and whole-body endurance performance
- challenge age-related stereotypesTrusted Source and improve physical functioning
- motivate you to do things you probably wanted to do anyway
Learning entirely new things is far more complicated.
Say you’ve been studying a foreign language. There’s only a small chance that listening to vocabulary words in your sleep can help you remember them a bit better. A 2015 study found that this is true only under the best of circumstances. The researchers noted that you can’t learn new things during your sleep.
On the other hand, sleep is crucial to brain function. Getting adequate sleep can help improve learning, memory, and problem-solving skills.
Perhaps the boost to intellectual performance from sleep is the reason this myth endures. If you want to learn something new, your best bet is to tackle it head on rather than subliminally.
Well, your brain definitely has a left side (left brain) and a right side (right brain). Each hemisphere controls certain functions and movement on the opposite side of your body.
Beyond that, the left brain is more verbal. It’s analytical and orderly. It takes in the small details, and then puts them together to understand the whole picture. The left brain handles reading, writing, and calculations. Some call it the logical side of the brain.
The right brain is more visual and deals in images more than words. It processes information in an intuitive and simultaneous manner. It takes in the big picture, and then looks at the details. Some say it’s the creative, artsy side of the brain.
There’s a popular theory that people can be divided into left-brained or right-brained personalities based on one side being dominant. Left-brained people are said to be more logical, and right-brained people are said to be more creative.
After a two-year analysisTrusted Source, a team of neuroscientists found no evidence to prove this theory. Brain scans showed that humans don’t favor one hemisphere over the other. It’s not likely that the network on one side of your brain is substantially stronger than the opposite side.
As with most things relating to the human brain, it’s complicated. While each hemisphere has its strengths, they don’t work in isolation. Both sides contribute something to logical and creative thinking.
5: Does alcohol really kill your brain cells?
There’s no question that alcohol affects the brain in negative ways. It can impair brain function even in the short term. In the longer term, it can lead to serious brain damage. It doesn’t actually kill brain cells, though.Long-term heavy drinking can cause shrinking of the brain and result in deficiencies in white matter. This can lead to:
- slurred speech
- blurred vision
- balance and coordination problems
- slowed reaction times
- memory impairment, including blackouts
Exactly how alcohol affects an individual’s brain depends on many factors, including:
- how much and how often you drink, and how long you’ve been drinking
- general health status
- family history of substance abuse
Alcoholics are prone to developing a brain disorder called Wernicke-Korsakoff syndrome. Symptoms include:
- mental confusion
- paralysis of nerves that control eye movement
- muscle coordination problems and difficulty walking
- chronic learning and memory problems
Drinking during pregnancy can affect your baby’s developing brain, a condition known as fetal alcohol syndrome. Children with fetal alcohol syndrome tend to have smaller brain volume (microcephaly). They can also have fewer brain cells or normally functioning neurons. This can cause long-term behavioral and learning problems.
Alcohol may interfere with the brain’s ability to grow new brain cells, which is another reason this myth may persist.
Why is it so easy to believe these myths about the brain? There’s a grain of truth running through some of them. Others seep into our own brains through repetition, and we fail to question their validity.
If you previously bought into some of these brain myths, take heart. You weren’t alone.
As much as scientists know about the human brain, there’s a long way to go before we come close to fully understanding the mysterious organ that makes us human.
In mathematics, a percentage (from Latin per centum “by a hundred”) is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, “%”, although the abbreviations “pct.”, “pct” and sometimes “pc” are also used. A percentage is a dimensionless number (pure number); it has no unit of measurement.