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Exercise 3. Now divide into pairs or small groups and read about each method. Then tell other students what you have read about. Try not to miss any detail.

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  1. A Anyway, I suppose ___ heard about Mark and Sonia?
  2. A FEW WORDS ABOUT OPERATING A BUSINESS
  3. A pop-quiz. How much you know about the movies? If you are not sure about something, find the information out.
  4. A. Work in groups of four.
  5. About Business - Developing your career
  6. About business - Outsourcing
  7. About Halliburton
  8. ABOUT MYSELF
  9. About the Author
  10. About the author

 

METHOD 1: EXERCISE

Mice that run on wheels increase the number of neurons in their hippocampus and perform better on tests of learning and memory. Studies of humans have revealed that exercise can improve the brains executive functions (planning, organizing, multitasking, and more). Exercise is also well known for its mood-boosting effects, and people who exercise are less likely to get dementia as they age. Among those who are already aged, athletic senior citizens have better executive function than do those who are sedentary; even seniors who have spent their entire lives on the couch can improve these abilities just by starting to move more in their golden years. You dont need to be Chuck Norris (thankfully) to get the brain benefits of exercise. Studies of senior citizens have shown that as little as 20 minutes of walking a day can do the trick.

A variety of mechanisms might be responsible for this brain boost. Exercise increases blood flow to the brain, which also increases the delivery of oxygen, fuel and nutrients to those hard-working neurons. Research has shown that exercise can increase levels of a substance called brain-derived neurotrophic factor (BDNF), which encourages growth, communication and survival of neurons. Exercise also improves sleep quality, a pile of studies suggests. And immune function. Is there anything it cant do?

 

METHOD 2: DIET

The brain needs fuel just as the body does. So what will really boost your brainpower, and what will make you lose your mind? Saturated fat, that familiar culprit, is no better for the brain than it is for the body. Rats fed diets high in saturated fat underperformed on tests of learning and memory, and humans who live on such diets seem to be at increased risk for dementia.

Not all fat is bad news, however. The brain is mostly fatall those cell membranes and myelin coverings require fatty acidsso it is important to eat certain fats, particularly omega-3 fats, which are found in fish, nuts and seeds. Alzheimers disease, depression, schizophrenia and other disorders may be associated with low levels of omega-3 fatty acids. It is especially important that babies get enough fat. Babies who dont get enough of the stuff have trouble creating the fatty myelin insulation that helps neurons transmit signals. Luckily for babies, breast milk is 50 percent fat.

Fruits and vegetables also appear to be brain superfoods. Produce is high in substances called antioxidants, which counteract atoms that can damage brain cells. Researchers have found that high-antioxidant diets keep learning and memory sharp in aging rats and even reduce the brain damage caused by strokes. Thats food for thought.

Its not just what you eat that affects the brain. Its also how much. Research has shown that laboratory animals fed calorie-restricted dietsanywhere from 25 to 50 percent less than normallive longer than other animals do. And it turns out they also have improved brain function, performing better on tests of memory and coordination. Rodents on calorie-restricted diets are also better able to resist the damage that accompanies Alzheimers, Parkinsons and Huntingtons disease.

 

METHOD 3: STIMULANTS

Stimulants are substances that rev up the nervous system, increasing heart rate, blood pressure, energy, breathing and more. Caffeine is probably the most famous of the group. (It is actually the most widely used drug in the world.) By activating the central nervous system, caffeine boosts arousal and alertness. Although high doses of caffeine can undoubtedly have unpleasant effects (ranging from irritability, anxiety and insomnia to the most unpleasant of all: death in rare cases), small to moderate amounts can boost our mental functioning in ways researchers are now measuring. One study showed that the equivalent of two cups of coffee can boost short-term memory and reaction time. Functional MRI scans taken during the study also revealed that volunteers who had been given caffeine had increased activity in the brain regions involving attention. In addition, research suggests caffeine can protect against age-related memory decline in older women. But try to limit yourself to fewer than 100 cups a day. That much coffee contains about 10 grams of caffeine, enough to cause fatal complications.

Cocaine and amphetamines are less benign. Although they work on the brain through different mechanisms, they have similar effects. Taking them increases the release of some of the brains feel-good neurotransmittersincluding dopamine and serotoninand produces a rush of euphoria. They also increase alertness and energy. That all sounds pretty good, but cocaine and amphetamines are extremely addictive drugs and in high doses they can cause psychosis and withdrawal. The withdrawal symptoms are nasty and can lead to depression, the opposite of that euphoric feeling. And of course, an overdose can kill you.

 

METHOD 4: VIDEO GAMES

Video games could save your life. Surgeons who spend at least a few hours a week playing video games make one-third fewer errors in the operating room than nongaming doctors do. Indeed, research has shown that video games can improve mental dexterity, while boosting hand-eye coordination, depth perception and pattern recognition. Gamers also have better attention spans and information-processing skills than the average Joe has. When nongamers agree to spend a week playing video games (in the name of science, of course), their visual-perception skills improve. And strike your notions of gamers as outcasts: one researcher found that white-collar professionals who play video games are more confident and social.

Of course, we cannot talk about the effects of video games without mentioning the popular theory that they are responsible for increasing real-world violence. A number of studies have reinforced this link. Young men who play a lot of violent video games have brains that are less responsive to graphic images, suggesting that these gamers have become desensitized to such depictions. Another study revealed that gamers had patterns of brain activity consistent with aggression while playing first-person shooter games. This does not necessarily mean these players will actually be violent in real life. The connections are worth exploring, but so far the data do not support the idea that the rise of video games is responsible for increased youth violence.

 

METHOD 5: MUSIC

When you turn on Queens Greatest Hits, the auditory cortex analyzes the many components of the music: volume, pitch, timbre, melody and rhythm. But theres more to musics interaction with the brain than just the raw sound. Music can also activate your brains reward centers and depress activity in the amygdala, reducing fear and other negative emotions. A highly publicized study suggested that listening to Mozart could boost cognitive performance, inspiring parents everywhere to go out and buy classical CDs for their children. The idea of a Mozart effect remains popular, but the original study has been somewhat discredited, and any intellectual boost that comes from listening to music seems to be tiny and temporary. Nevertheless, music does seem to possess some good vibrations. It can treat anxiety and insomnia, lower blood pressure, soothe patients with dementia, and help premature babies to gain weight and leave the hospital sooner.

Music training can bolster the brain. The motor cortex, cerebellum and corpus callosum are all bigger in musicians than in nonmusicians. And string players have more of their sensory cortices devoted to their fingers than do those who dont play the instruments. There is no agreement yet on whether musical training makes you smarter, but some studies have indeed shown that music lessons can improve the spatial abilities of young kids.

 

METHOD 6: MEDITATION

Meditation, or the turning of the mind inward for contemplation and relaxation, seems to help all types of conditionsanxiety disorders, sure, but it can also reduce pain and treat high blood pressure, asthma, insomnia, diabetes, depression and even skin conditions. And regular meditators say they feel more at ease and more creative than nonmeditators do. Researchers are now illuminating the actual brain changes caused by meditation by sticking meditators into brain-imaging machines. For one, although the brains cells typically fire at all different times, during meditation they fire in synchrony. Expert meditators also show spikes of brain activity in the left prefrontal cortex, an area of the brain that has generally been associated with positive emotions. And those who had the most activity in this area during meditation also had big boosts in immune system functioning.

Meditation can increase the thickness of the cerebral cortex, particularly in regions associated with attention and sensation. (The growth does not seem to result from the cortex growing new neurons, thoughit appears that the neurons already there make more connections, the number of support cells increases, and blood vessels in that area get bigger.) (From Scientific American, February, 2009)

 

Exercise 4. Do you agree with the recommendations given? Comment on each method suggested.

 

Exercise 5. Do you know any other methods that can help you to increase brainpower?

 

 


: 2015-09-10; : 5 |

Contents | Exercise 3. Now read the text about a unique brain operation. | Now read the explanation given by Randall K. Packer, a professor of biology at George Washington University, and check if your answer was correct. | Exercise 5. Now read the article about water overdose. | Text A. The Largest Organism on Earth Is a Fungus | Fungus genome boosts fight to save North American forests | Exercise 7. Put the words given in the brackets in the correct word-form. | Antibacterial Products May Do More Harm Than Good | Text B. Scientists Explain Why Vegetable Recipes Skimp on Spices | Text A. The Origin of Dogs |


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