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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

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Netflix is trying to prove to the world that it's all grown up

Netflix is trying to persuade Wall Street that it is now all grown up. After squeezing out millions of additional subscribers via its password sharing crackdown and through the introduction of cheaper advertiser-supported plans, the streamer knows that its growth spurts are coming to an end — and now it wants investors to stop obsessing over those pesky membership numbers and instead focus on other metrics.

"In our early days, when we had little revenue or profit, membership growth was a strong indicator of our future potential. But now we're generating very substantial profit and free cash flow. We are also developing new revenue streams like advertising and our extra member feature, so memberships are just one component of our growth", Netflix told shareholders as it reported quarterly earnings.

To that end, Netflix said that it will no longer report quarterly subscriber numbers, starting in 2025. Alas, the metric that Wall Street has forever judged Netflix on — the metric that prompted legacy media companies to burn endless piles of cash in their bids to compete with the streamer — will be retired. The decision to shut off transparency on the metric represents a significant turning point in the streaming revolution. For years, Netflix has prided itself on being extraordinarily transparent. Now it is aiming to hold its cards closer to its chest. And given that streaming giant is the trendsetter in the space, one could expect that other media companies will be inspired by the company's move and also opt to cease reporting such data.

To be fair, what Netflix is saying isn't necessarily off base either. As the company shifts its business model away from subscriptions and toward advertising and other revenue streams, it makes sense to consider how much time users are spending on the service. The more content a user consumes on Netflix, the more likely they are to continue paying for the service, and the more money Netflix then makes from that single subscriber. "We're focused on revenue and operating margin as our primary financial metrics — and engagement (i.e. time spent) as our best proxy for customer satisfaction,” Netflix underscored in its letter to shareholders.

Regardless, less transparency in an already opaque industry is not ideal. The walled garden of streaming already lacks the same detailed viewership data that Nielsen collects on linear television broadcasters. Now, visibility into the streaming world will get even dimmer.

The announcement from Netflix managed to overshadow its otherwise stellar quarter. The company handily beat expectations and added a staggering 9.3 million subscribers, meaning it now boasts nearly 270 million in total. Netflix also beat analyst expectations on both earnings and revenue. However, it wasn't all good news. Netflix forecasted its subscriber growth to be lower in quarter two, chalking it up to “typical seasonality.” That led the stock to slide nearly 5% in after-hours trading.

Whether "typical seasonality” is solely to blame, or whether the streamer is simply starting to hit a ceiling, is hard to tell. Perhaps it is a mix of both. Whatever the cause, the stock sliding on the less-than-ideal outlook is a prime example of why Netflix wants Wall Street to stop focusing on its subscriber numbers. And, in one year's time, investors won't have a choice.

Adapted from: https://edition.cnn.com/2024/04/19/media/netflix-subscription-numbers/index.html

(Available at: education.nationalgeographic.org/resource/earth-day/– text specially adapted for this test).

Elephant Calf Separated From Herd in India is Reunited With Its Mother 

(Available at: https://www.theguardian.com/world/2024/jan/03/elephant-calf-separated-from-herd-in-india-isreunited-with-mother – text especially adapted for this test).

(Available in: www.cbsnews.com/news/most-googled-searches-of-2023/ – text especially adapted for this test).