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The brain is one of the most amazing organs in the human body. It controls our central nervous system, keeping us walking, talking, breathing and thinking. It controls our central nervous system, keeping us walking, talking, breathing and thinking. Kaho na pyar hai mp3 download.

The 10 percent of the brain myth is a widely perpetuated urban legend that most or all humans only use 10 percent (or some other small percentage) of their brains. It has been misattributed to many people, including Albert Einstein.^[1] By extrapolation, it is suggested that a person may harness this unused potential and increase intelligence.

Changes in grey and white matter following new experiences and learning have been shown, but it has not yet been proven what the changes are.^[2] The popular notion that large parts of the brain remain unused, and could subsequently be 'activated', rests in popular folklore and not science. Though mysteries regarding brain function remain—e.g. memory, consciousness—the physiology of brain mapping suggests that all areas of the brain have a function.^[3][4]

Origin[edit]

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One possible origin is the reserve energy theories by Harvard psychologists William James and Boris Sidis in the 1890s who tested the theory in the accelerated raising of child prodigy William Sidis; thereafter, James told audiences that people only meet a fraction of their full mental potential, which is a plausible claim.^[5] In 1936, American writer Lowell Thomas summarized this idea (in a foreword to Dale Carnegie's How to Win Friends and Influence People) by adding a falsely precise percentage: 'Professor William James of Harvard used to say that the average man develops only ten percent of his latent mental ability'.^[6] This book was not the first to use the 10 percent figure, which was already circulating within the self-help movement before then; for example, the book Mind Myths: Exploring Popular Assumptions About the Mind and Brain includes a chapter on the ten percent myth that shows a self-help advertisement from the 1929 World Almanac with the line 'There is NO LIMIT to what the human brain can accomplish. Scientists and psychologists tell us we use only about TEN PERCENT of our brain power.'^[7]

In the 1970s the Bulgarian-born psychologist and educator, Georgi Lozanov proposed the teaching method of suggestopedia believing 'that we might be using only five to ten percent of our mental capacity'.^[8][9] The origin of the myth has also been attributed to Wilder Penfield, the U.S.-born neurosurgeon who was the first director of Montreal Neurological Institute of McGill University.^[10]

According to a related origin story, the ten percent myth most likely arose from a misunderstanding (or misrepresentation) of neurological research in the late 19th century or early 20th century. For example, the functions of many brain regions (especially in the cerebral cortex) are complex enough that the effects of damage are subtle, leading early neurologists to wonder what these regions did.^[11] The brain was also discovered to consist mostly of glial cells, which seemed to have very minor functions. James W. Kalat, author of the textbook Biological Psychology, points out that neuroscientists in the 1930s knew about the large number of 'local' neurons in the brain. The misunderstanding of the function of local neurons may have led to the ten percent myth.^[12] The myth might have been propagated simply by a truncation of the idea that some use a small percentage of their brains at any given time.^[1] In the same article in Scientific American, John Henley, a neurologist at the Mayo Clinic in Rochester, Minnesota states: 'Evidence would show over a day you use 100 percent of the brain'.^[1]

Although parts of the brain have broadly understood functions, many mysteries remain about how brain cells (i.e., neurons and glia) work together to produce complex behaviors and disorders. Perhaps the broadest, most mysterious question is how diverse regions of the brain collaborate to form conscious experiences. So far, there is no evidence that there is one site for consciousness, which leads experts to believe that it is truly a collective neural effort. Therefore, as with James's idea that humans have untapped cognitive potential, it may be that a large number of questions about the brain have not been fully answered.^[1]

Analysis[edit]

Neurologist Barry Gordon describes the myth as false, adding, 'we use virtually every part of the brain, and that (most of) the brain is active almost all the time.'^[1] Neuroscientist Barry Beyerstein sets out seven kinds of evidence refuting the ten percent myth:^[13]Etv daily telugu serials.

1. Studies of brain damage: If 10 percent of the brain is normally used, then damage to other areas should not impair performance. Instead, there is almost no area of the brain that can be damaged without loss of abilities. Even slight damage to small areas of the brain can have profound effects.
2. Brain scans have shown that no matter what one is doing, all brain areas are always active. Some areas are more active at any one time than others, but barring brain damage, there is no part of the brain that is absolutely not functioning. Technologies such as positron emission tomography (PET) and functional magnetic resonance imaging (fMRI) allow the activity of the living brain to be monitored. They reveal that even during sleep, all parts of the brain show some level of activity. Only in the case of serious damage does a brain have 'silent' areas.
3. The brain is enormously costly to the rest of the body, in terms of oxygen and nutrient consumption. It can require up to 20 percent of the body's energy—more than any other organ—despite making up only 2 percent of the human body by weight.^[14][15] If 90 percent of it were unnecessary, there would be a large survival advantage to humans with smaller, more efficient brains. If this were true, the process of natural selection would have eliminated the inefficient brain portions. It is also highly unlikely that a brain with so much redundant matter would have evolved in the first place; given the historical risk of death in childbirth associated with the large brain size (and therefore skull size) of humans,^[16] there would be a strong selection pressure against such a large brain size if only 10 percent was actually in use.
4. Localization of function: Rather than acting as a single mass, the brain has distinct regions for different kinds of information processing. Decades of research have gone into mapping functions onto areas of the brain, and no function-less areas have been found.
5. Microstructural analysis: In the single-unit recording technique, researchers insert a tiny electrode into the brain to monitor the activity of a single cell. If 90 percent of cells were unused, then this technique would have revealed that.
6. Synaptic pruning: Brain cells that are not used have a tendency to degenerate. Hence if 90 percent of the brain were inactive, autopsy of normal adult brains would reveal large-scale degeneration.

In debunking the ten percent myth, Knowing Neurons editor Gabrielle-Ann Torre writes that using one hundred percent of one's brain would not be desirable either. Such unfettered activity would almost certainly trigger an epileptic seizure.^[17] Torre writes that, even at rest, a person likely uses as much of his or her brain as reasonably possible through the default mode network, a widespread brain network that is active and synchronized even in the absence of any cognitive task. Thus, 'large portions of the brain are never truly dormant, as the 10% myth might otherwise suggest.'

In popular culture[edit]

Several books, films, and short stories have been written closely related to this myth. They include the 1986 film Flight of the Navigator; the novel The Dark Fields and its 2011 film adaptation, Limitless (claiming 20 percent rather than the typical 10 percent); the ninth book (White Night) of Jim Butcher's book series The Dresden Files; the shōnenmangaPsyren; and the 2014 film Lucy—all of which operate under the notion that the rest of the brain could be accessed through use of a drug.^[18]Lucy in particular depicts a character who gains increasingly godlike abilities once she surpasses 10 percent, though the film suggests that 10 percent represents brain capacity at a particular time rather than permanent usage.

The myth was 'busted' on a 27 October 2010 episode of MythBusters. The hosts used magnetoencephalography and functional magnetic resonance imaging to scan the brain of someone attempting a complicated mental task, and found that over 10%, as much as 35%, was used during the course of their test.^[19]

The 10 percent brain myth occurs frequently in advertisements,^[20] and in entertainment media it is often cited as if it were fact.^[21]

Some New Age proponents propagate the 'ten percent of the brain' belief by asserting that the 'unused' ninety percent of the human brain is capable of exhibiting psychic powers and can be trained to perform psychokinesis and extra-sensory perception.^[3][13] There is no scientifically verified body of evidence supporting the existence of such powers.^[13]

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In 1980, Roger Lewin published an article in Science, 'Is Your Brain Really Necessary?',^[22] about studies by John Lorber on cerebral cortex losses. He reports the case of a Sheffield University student who had a measured IQ of 126 and passed a Mathematics Degree but who had hardly any discernible brain matter at all since his cortex was extremely reduced by hydrocephalus. The article led to the broadcast of a Yorkshire Television documentary of the same title, though it was about a different patient who had normal brain mass distributed in an unusual way in a very large skull.^[23]

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See also[edit]

• Pineal gland, a part of the brain that has attracted pseudoscientific interest

References[edit]

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1. ^ ^abcde'Do People Only Use 10 Percent Of Their Brains'. Scientific American. 7 February 2008. Archived from the original on 17 November 2008. Retrieved 7 February 2008.
2. ^University of Oxford (16 October 2009). 'Juggling Enhances Connections In The Brain'. ScienceDaily. Archived from the original on 29 December 2011. Retrieved 30 May 2012. We've shown that it is possible for the brain to condition its own wiring system to operate more efficiently.
3. ^ ^abRadford, Benjamin (8 February 2000). 'The Ten-Percent Myth'. snopes.com. Retrieved 13 April 2006.
4. ^Chudler, Eric. 'Myths About the Brain: Ten percent and Counting'. Archived from the original on 2 April 2006. Retrieved 12 April 2006.
5. ^'Debunking Common Brain Myths'. Archived from the original on 10 May 2013. Retrieved 24 May 2011.
6. ^'A Shortcut to Distinction'. Archived from the original on 15 May 2011. Retrieved 24 May 2011.
7. ^Beyerstein, Barry L. (1999), 'Whence Cometh the Myth that We Only Use 10% of our Brains?', in Della Salla, Sergio (ed.), Mind Myths: Exploring Popular Assumptions About the Mind and Brain, Wiley, p. 11, ISBN978-0471983033
8. ^Larsen-Freeman, Diane (2000). Techniques and Principles in Language Teaching. Teaching Techniques in English as a Second Language (2nd ed.). Oxford. Oxford University Press. p. 73. ISBN978-0-19-435574-2.
9. ^http://lppm.dinus.ac.id/docs/m/Suggestopedia:_How_Does_It_Accelerate_Language_Learning1.pdf^{[permanent dead link]}
10. ^'Do we use only 10 percent of our brain?'Psychology Today
11. ^'Wang, Sam and Aamodt, Sandra (2 February 2008). Welcome to Your Brain: Why You Lose Your Car Keys but Never Forget How to Drive and Other Puzzles of Everyday Life. ISBN9781596912830. Retrieved 25 September 2011.CS1 maint: Multiple names: authors list (link)
12. ^Kalat, J.W., Biological Psychology, sixth edition, Pacific Grove: Brooks/Cole Publishing Co., 1998, p. 43.
13. ^ ^abcBeyerstein, Barry L. (1999). 'Whence Cometh the Myth that We Only Use 10% of our Brains?'. In Sergio Della Sala (ed.). Mind Myths: Exploring Popular Assumptions About the Mind and Brain. Wiley. pp. 3–24. ISBN0-471-98303-9.
14. ^Swaminathan, Nikhil (29 April 2008). 'Why Does the Brain Need So Much Power?'. Scientific American. Scientific American, a Division of Nature America, Inc. Archived from the original on 12 July 2010. Retrieved 19 November 2010.
15. ^Carpenter's Human Neuroanatomy, Ch. 1
16. ^Rosenberg, K.R., 'The Evolution of Modern Childbirth' in American Journal of Physical Anthropology 35, 1992, p. 89–124.
17. ^'The Life and Times of the 10% Neuromyth - Knowing Neurons'. Knowing Neurons. 13 February 2018. Archived from the original on 15 March 2018. Retrieved 24 February 2018.
18. ^Bahn, Christopher. ''Limitless' brainpower plot isn't all that crazy'. Archived from the original on 13 March 2011. Retrieved 31 March 2011.
19. ^'10 Percent of Brain'. Archived from the original on 31 March 2017. Retrieved 26 March 2017.
20. ^'Neuroscience For Kids'. Eric H. Chudler, Ph.D. (Executive Director, CSNE; University of Washington). Archived from the original on 27 October 2008. Retrieved 14 November 2008.
21. ^'90% of Your Brain - TV Tropes'. tvtropes.org. Archived from the original on 27 October 2017. Retrieved 7 May 2018.
22. ^Roger Lewin (12 December 1980). 'Is Your Brain Really Necessary?'. Science. 210 (4475): 1232–1234. doi:10.1126/science.7434023. PMID7434023.
23. ^The skull had been enlarged by pressure from the hydrocephalus fluid. Her brain was thinly spread, but occupied her entire braincase, and its thickness was such that she had a brain volume of approximately 200 cm³. The woman had been told all her life that she had only 15% of normal brain mass, but those who told her this had not taken the form of her cranium into account. 'Archived copy'. Archived from the original on 14 October 2009. Retrieved 3 April 2010.CS1 maint: Archived copy as title (link)