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People are always arguing about what determines our thoughts and behavior more - innate abilities and characteristics or life experience and environment. Research by neuroscientists who study the brains of monks, chess players, gamers and other well-defined social groups is helping to get closer to the answer.
Alex Honnold can climb a sheer cliff several hundred or even thousands of meters high, alone and without insurance. Sweaty palms, dizziness, heart pounding in his ears - all this seems to be unfamiliar to him. Tests show that Honnold is completely devoid of a sense of fear: he was placed in a tomograph and shown scary photographs, and in response his tonsils - the areas of the brain responsible for the formation of both positive and negative emotions - remained stoic calm.
In other people, even in other extreme athletes, similar tests ignite a whole fire on the MRI scans of the tonsils, but this was not the case with Honnold. In this he is similar to people suffering from a rare Urbach disease - Vite, but only together with the fearlessness associated with non-working tonsils, he did not receive side effects such as a complete violation of the sense of personal space.
Honnold's case is unique and a gift for neuroscience. His fearlessness helps to better understand how our consciousness generates different feelings and how much they are intertwined with each other. In the same way, the case of Phineas Gage, whose head was pierced through and through with scrap metal, at one time showed scientists that organic brain damage can change a person's personality beyond recognition.
The study of the identified social groups is the opposite of the bright-case approach, and ideally they should complement each other. The cases of Honnold and Gage show us breakthrough points, places where the modern scientific paradigm sags, and systematic studies of the brains of representatives of clear social groups expand this paradigm, add details to the accepted picture of the world and help understand individual phenomena.
Harbingers of Alzheimer's and the Nature of Programming Languages: The Brains of Nuns and Coders
In 1986, scientists at the University of Minnesota began a long-term study of Catholic nuns in which they wanted to find reliable causes of Alzheimer's disease. All nuns lead a very similar life, do not use drugs, are not addicted to alcohol, and therefore are ideal for such a study, in which it is necessary to strictly distinguish the impact on health of lifestyle and heredity.
This work continues to this day, and 678 nuns have already taken part in it. She showed that the development of Alzheimer's can be predicted with high reliability long before old age. Before the tonsure (average age 22), each woman wrote an autobiographical essay, the linguistic complexity of which, it turned out, indicated the likelihood of developing the disease. 80% of nuns, whose texts did not indulge in complex syntax and various grammatical constructions, suffered from Alzheimer's disease in old age, while among the authors of more intricate texts, only 10% fell ill.
Scientists from Germany and the United States solved completely different problems in their research, who wanted to understand how similar programming languages are to ordinary, natural languages. To do this, they recruited 17 subjects and scanned the activity of their brain in a tomograph while performing simple tasks: people had to read a short program written in Java and predict the result of its work (all subjects knew the basics of programming).
It turned out that such tasks activate the work of several parts of the brain, normally responsible for memory, attention and language abilities. At the same time, the structures associated with mathematical calculations and logic remain almost completely at rest. It turns out that coding is closer to speaking in a foreign language than to solving mathematical problems - of course, with the bold proviso that reading the simplest programs in a few tens of lines can plausibly simulate the writing of real programs for thousands and thousands of lines.
How life changes our thinking: taxi drivers, musicians and chess players
Sebastian Seung, a professor at MIT and a neuroscience specialist, compares our neural activity to water, which directs the course of a stream - the structure of the brain and the intricacies of neural connections in it. The natural features of the structure of the nervous system, on the one hand, determine our thoughts and feelings, and on the other, they are constantly changing under the influence of the same thoughts, like water washing away the banks and making a new channel for itself. Many studies support this Seung's idea: our experience and our life can indeed change the structure of the brain.
Every licensed taxi driver in London must pass a difficult test - learn the names and features of about 25 thousand London streets and memorize all the sights on them, so that later on the exam, in writing and in maximum detail, plan any route around the city.
As shown in a 2000 study, such training not only makes maps or navigators unnecessary, but also greatly increases the volume of the back of the hippocampus - the area of the brain associated with orientation in space. Hard work and long wanderings through London streets seem to sharpen the brain for an ideal sense of space. At the same time, the volume of the rear part of the hippocampus increases in taxi drivers the more, the more time they spent behind the wheel.
There is a similar story for stringed musicians. German scientists have shown that the longer they play music, the more, in comparison with ordinary people, the volume of the cerebral cortex, which regulates the movements of the fingers, increases.
However, this logic - the more the better - does not always work. Another study, conducted by Swiss scientists on 20 professional chess players and 20 amateur chess players, showed that vocational training sometimes may not increase, but, on the contrary, decrease the volume of certain areas, which in the first approximation (but only in the first) even looks like a characteristic picture with porn addiction or alcoholism.
Playing chess, according to these data, leads to a decrease in the volume of gray matter in the area of the junction of the temporal and occipital lobes of the brain, a decrease in the volume of the caudate nucleus (responsible for making decisions ) and a decrease in the branching of the upper longitudinal bundle (transmits information from visual zones to executive ones). Experienced chess players seem to balance their brain and teach it to effectively cope with complex intellectual tasks with few resources (and do not kill it, as people with addiction do). In the same way, Neymar, one of the best modern footballers, has excellent ball control, showing significantly less brain activity than other footballers.
Inborn traits: phoneticians and gamers
Many may interpret the findings of a study with chess players in a completely different way. Perhaps from birth there are a number of people with a harmoniously organized, balanced, chess mindset, and only they can become real grandmasters over time - for the rest, chess will remain at the level of a hobby. Such logic leads us to exactly the same data as logic with a channel changing under the influence of a rapid water flow, and therefore long-term long-term studies are almost always needed to understand the true nature of the changes observed in the brain.
Scientists who have studied the brains of computer game fans have encountered similar explanations for the data. Their 2011 study involved 154 adolescents who were divided into two groups: those who played computer games often (more than nine hours a week) and those who played rarely (less than nine hours). As a result, it turned out that active gamers had a significantly increased volume of pleasure centers concentrated in the ventral part of the striatum and secreting various substances that fill us with happiness and pleasure in response to food, communication, sex and other pleasant actions.
Similar deviations are observed in schizophrenics or people with different types of addictions, but all the subjects, according to scientists, from the point of view of psychiatry, have not yet become addicted to video games. Again, this coincidence can be interpreted in two ways: either computer games can gradually lead to addiction, or there are people by nature who tend to seek easy, guaranteed pleasures, one of which can be video games.
Much more unambiguous are the results of the neuroscientist Narli Golestani, who studied the work of the brain of phoneticists - people who analyze the sounds of various languages, many of which they sometimes do not even know how to speak. She showed that the auditory cortex of phoneticians has a more complex structure than that of ordinary people - it has more digital convolutions filled with white matter. At the same time, it is reliably known that these features cannot arise and develop after the birth of a person. It turns out that you can only be born a phonetician, but what to do with taxi drivers, musicians, chess players and other highly specialized professions is still unclear. While science does not forbid anyone to try their hand at each of them and hope for success.