Questões de Concurso

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Why is music good for the brain?

October 7,2020

By Andrew E. Budson, MD, Editorial Advisory Board Member, Harvard Health Publishing

1. Can music really affect your well-being, learning, cognitive function, quality of life, and even happiness? Hand in a recent survey on music and brain health conducted by AARP revealed some interesting findings about the impact of music on cognitive and emotional well-being: music listeners had higher scores for mental well-being and slightly reduced levels of anxiety and depression compared to people overall.

2. Of survey respondents who currently go to musical performances,69% rated their brain health as “excellent” or “very good, ” compared to 58% for those who went in the past and 52% for those who never attended. Of those who reported often being exposed to music as a child,68% rated their ability to learn new things as “excellent” or “very good, ” compared to 50% of those who were not exposed to music.

3. Active musical engagement, including those over age 50, was associated with higher rates of happiness and good cognitive function. Adults with no early music exposure but who currently engage in some music appreciation show above average mental well-being scores. Those are pretty impressive results, to be sure. However, this 20-minute online survey has some limitations. For one, it included 3,185 US adults ages 18 and older; that is a small number if you are extrapolating to 328 million people across the country. For another, it is really a survey of people’s opinions. For example, although people might report their brain health as “excellent, ” there was no objective measure of brain health such as an MRI scan, or even a test to measure their cognition.

4. Lastly, even if the ratings were true, the findings are only correlations. They do not prove that, for example, it was the exposure to music as a child that led to one’s improved ability to learn new things. It may be equally likely that those children brought up in more affluent households were both more likely to be exposed to music and to be given a good education that led to their being able to easily learn new things later in life.

5. Music has been shown to activate some of the broadest and most diverse networks of the brain. Of course, music activates the auditory cortex in the temporal lobes close to your ears, but that’s just the beginning. The parts of the brain involved in emotion are not only activated during emotional music, they are also synchronized. Music also activates a variety of memory regions. And, interestingly, music activates the motor system. In fact, it has been theorized that it is the activation of the brain’s motor system that allows us to pick out the beat of the music even before we start tapping our foot to it!

6. Okay, get along! so music activates just about all of the brain. Why is that so important? Well, have you ever heard the expression, “If you don’t use it, you’ll lose it”? It turns out this is actually true in the brain. Brain pathways — and even whole networks — are strengthened when they are used and are weakened when they are not used. The reason is that the brain is efficient; it isn’t going to bother keeping a brain pathway strong when it hasn’t been used in many years. The brain will use the neurons in that pathway for something else. These types of changes should be intuitively obvious to you — that’s why it is harder to speak that foreign language if you haven’t used it in 20 years; many of the old pathways have degraded and the neurons are being used for other purposes.

BUDSON, Andrew E. Why is music good for the brain? Harvard Health Publishing,7 out.2020. Disponível em: . Acesso em: 12 maio 2024

Six things I learned from riding in a Google self-driving car

1 - Human beings are terrible drivers.

We drink. We doze. We text. In the US,30,000 people die from automobile accidents every year. Traffic crashes are the primary cause of death worldwide for people aged 15-24, and during a crash,40% of drivers never even hit the brakes. We’re flawed organisms, barreling around at high speeds in vessels covered in glass, metal, distraction, and death. This is one of Google’s “moonshots” – to remove human error from a job which, for the past hundred years, has been entirely human.

2 - Google self-driving cars are timid.

The car we rode in did not strike me as dangerous. It drove slowly and deliberately, and I got the impression that it’s more likely to annoy other drivers than to harm them. In the early versions they tested on closed courses, the vehicles were programmed to be highly aggressive. Apparently during these tests, which involved obstacle courses full of traffic cones and inflatable crash-test objects, there were a lot of screeching brakes, roaring engines and terrified interns.

3 - They’re cute.

Google’s new fleet was intentionally designed to look adorable. Our brains are hardwired to treat inanimate (or animate) objects with greater care, caution, and reverence when they resemble a living thing. By turning self-driving cars into an adorable Skynet Marshmallow Bumper Bots, Google hopes to spiritually disarm other drivers. I also suspect the cuteness is used to quell some of the road rage that might emerge from being stuck behind one of these things. They’re intended as moderate-distance couriers, not openroad warriors, so their max speed is 25 miles per hour.

4 - It’s not done and it’s not perfect.

Some of the scenarios autonomous vehicles have the most trouble with are the same human beings have the most trouble with, such as traversing four-way stops or handling a yellow light. The cars use a mixture of 3D laser-mapping, GPS, and radar to analyze and interpret their surroundings, and the latest versions are fully electric with a range of about 100 miles. Despite the advantages over a human being in certain scenarios, however, these cars still aren’t ready for the real world. They can’t drive in the snow or heavy rain, and there’s a variety of complex situations they do not process well, such as passing through a construction zone. Google is hoping that, eventually, the cars will be able to handle all of this as well (or better) than a human could.

5 - I want this technology to succeed, like… yesterday.

I’m biased. Earlier this year my mom had a stroke. It damaged the visual cortex of her brain, and her vision was impaired to the point that she’ll probably never drive again. This reduced her from a fully-functional, independent human being with a career and a buzzing social life into someone who is homebound, disabled, and powerless. When discussing self-driving cars, people tend to ask many superficial questions. They ignore that 45% of disabled people in the US still work. They ignore that 95% of a car’s lifetime is spent parked. They ignore how this technology could transform the lives of the elderly, or eradicate the need for parking lots or garages or gas stations. They dismiss the entire concept because they don’t think a computer could ever be as good at merging on the freeway as they are. They ignore the great, big, beautiful picture: that this technology could make our lives so much better.

6 - It wasn’t an exhilarating ride, and that’s a good thing.

Riding in a self-driving car is not the cybernetic thrill ride one might expect. The car drives like a person, and after a few minutes you forget that you’re being driven autonomously. You forget that a robot is differentiating cars from pedestrians from mopeds from raccoons. You forget that millions of photons are being fired from a laser and interpreting, processing, and reacting to the hand signals of a cyclist. You forget that instead of an organic brain, which has had millions of years to evolve the cognitive ability to fumble its way through a four-way stop, you’re being piloted by an artificial one, which was birthed in less than a decade. The unfortunate part of something this transformative is the inevitable, ardent stupidity which is going to erupt from the general public. Even if in a few years self-driving cars are proven to be ten times safer than human-operated cars, all it’s going to take is one tragic accident and the public is going to lose their minds. There will be outrage. There will be politicizing. There will be hashtags. I say look at the bigger picture. All the self-driving cars currently on the road learn from one another, and possess 40 years of driving experience. And this technology is still in its infancy.

(Adapted from:: <http://theoatmeal.com/blog/google_self_driving_car> .21/08/2016.)