Links for Keyword: Learning & Memory
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By John Bohannon In July 1984, a man broke into the apartment of Jennifer Thompson, a 22-year-old in North Carolina, and threatened her with a knife. She negotiated, convincing him to not kill her. Instead, he raped her and fled. Just hours later, a sketch artist worked with Thompson to create an image of the assailant's face. Then the police showed her a series of mug shots of similar-looking men. Thompson picked out 22-year-old Ronald Cotton, whose photograph was on file because of a robbery committed in his youth. When word reached Cotton that the police were looking for him, he walked into a precinct voluntarily. He was eventually sentenced to life in prison based on Thompson's testimony. Eleven years later, after DNA sequencing technology caught up, samples taken from Thomson's body matched a different man who finally confessed. Cotton was set free. When Thompson first identified Cotton by photo, she was not convinced of her choice. "I think this is the guy," she told the police after several minutes of hesitation. As time went on, she grew surer. By the time Thompson faced Cotton in court a year later, her doubts were gone. She confidently pointed to him as the man who raped her. Because of examples like these, the U.S. justice system has been changing how eyewitnesses are used in criminal cases. Juries are told to discount the value of eyewitness testimony and ignore how confident the witnesses may be about whom they think they saw. Now, a new study of robbery investigations suggests that these changes may be doing more harm than good. © 2015 American Association for the Advancement of Science
Megan Scudellari In 1997, physicians in southwest Korea began to offer ultrasound screening for early detection of thyroid cancer. News of the programme spread, and soon physicians around the region began to offer the service. Eventually it went nationwide, piggybacking on a government initiative to screen for other cancers. Hundreds of thousands took the test for just US$30–50. LISTEN James Harkin, a researcher for the British TV trivia show QI, talks to Adam Levy about how he finds facts and myths for the show — and then runs a mini-quiz to see whether the Podcast team can discern science fact from science fiction 00:00 Across the country, detection of thyroid cancer soared, from 5 cases per 100,000 people in 1999 to 70 per 100,000 in 2011. Two-thirds of those diagnosed had their thyroid glands removed and were placed on lifelong drug regimens, both of which carry risks. Such a costly and extensive public-health programme might be expected to save lives. But this one did not. Thyroid cancer is now the most common type of cancer diagnosed in South Korea, but the number of people who die from it has remained exactly the same — about 1 per 100,000. Even when some physicians in Korea realized this, and suggested that thyroid screening be stopped in 2014, the Korean Thyroid Association, a professional society of endocrinologists and thyroid surgeons, argued that screening and treatment were basic human rights. © 2015 Nature Publishing Group,
Related chapters from BP7e: Chapter 6: Evolution of the Brain and Behavior; Chapter 17: Learning and Memory
Related chapters from MM:Chapter 13: Memory, Learning, and Development
Link ID: 21708 - Posted: 12.16.2015
Human memory is about to get supercharged. A memory prosthesis being trialled next year could not only restore long-term recall but may eventually be used to upload new skills directly to the brain – just like in the film The Matrix. The first trials will involve people with epilepsy. Seizures can sometimes damage the hippocampus, causing the brain to lose its ability to form long-term memories. To repair this ability, Theodore Berger at the University of Southern California and his colleagues used electrodes already implanted in people’s brains as part of epilepsy treatment to record electrical activity associated with memory. The team then developed an algorithm that could predict the neural activity thought to occur when a short-term memory becomes a long-term memory, as it passes through the hippocampus. Early next year, Berger’s team will use this algorithm to instruct the electrodes to predict and then mimic the activity that should occur when long-term memories are formed. “Hopefully, it will repair their long-term memory,” says Berger. Previous studies using animals suggest that the prosthesis might even give people a better memory than they could expect naturally. A similar approach could eventually be used to implant new memories into the brain. Berger’s team recorded brain activity in a rat that had been trained to perform a specific task. The memory prosthesis then replicated that activity in a rat that hadn’t been trained. The second rat was able to learn the task much faster than the first rat – as if it already had some memory of the task. © Copyright Reed Business Information Ltd.
By Elizabeth Pennisi Imagine trying to train wild sea lions—without them ever seeing you. That was Peter Cook's challenge 8 years ago when he was trying to figure out whether poisonous algae were irrevocably damaging the animals’ brains. With a lot of patience and some luck, the comparative neuroscientist from Emory University in Atlanta has succeeded, and the news isn't good. Toxins from the algae mangle a key memory center, likely making it difficult for sick animals to hunt or navigate effectively, Cook and his colleagues report today. "Sea lions can be seen as sentinels of human health," says Kathi Lefebvre, a research biologist at the Northwest Fisheries Science Center in Seattle, Washington, who was not involved with the work. As oceans warm, toxic algae proliferate and cause so-called red tides because the water looks reddish. So "understanding these toxins in wild animals is going to become more important," she says. Red tides are produced by algae called diatoms. They make a toxin called domoic acid, which is consumed by other plankton that in turn become food for fish and other organisms. Predators such as anchovies, sardines, and other schooling fish accumulate this toxin in their bodies. So when algal populations explode, say, because of warming water, domoic acid concentrations increase in these animals to a point that they affect the sea lions that feast on them. Scientists first recognized this problem in 1998, after hundreds of sea lions were found stranded or disoriented along California's coast. Since then, researchers have studied sick and dead sea lions and documented that the toxin causes seizures and damages the brain, sometimes killing the animal. © 2015 American Association for the Advancement of Science.
Related chapters from BP7e: Chapter 17: Learning and Memory; Chapter 4: The Chemistry of Behavior: Neurotransmitters and Neuropharmacology
Related chapters from MM:Chapter 13: Memory, Learning, and Development; Chapter 4: The Chemistry of Behavior: Neurotransmitters and Neuropharmacology
Link ID: 21700 - Posted: 12.15.2015
By Michael M. Torrice, We learn from experience: It sounds like a trite sentiment posted by a friend on Facebook, but neuroscientists would agree. Our interactions with the world around us strengthen and weaken the connections between our neurons, a process that neuroscientists consider to be the cellular mechanism of learning. Now researchers report that boosting signaling of a certain receptor in the brain with a small molecule can enhance these cellular changes and improve learning in people. The findings could lead to new treatments for patients with disorders associated with deficits in learning, such as Alzheimer’s disease and schizophrenia. Through decades of research on how synapses change in animal brains, scientists have found that the N-methyl-d-aspartate receptor (NMDAR) plays a critical role in strengthening synapses during learning. Compounds that increase NMDAR signaling can drive such changes and, as a result, help animals learn new tasks. Robert F. Asarnow at UCLA and colleagues wanted to test whether one such compound, d-cycloserine, would act similarly in people. But neuroscientists measure synapse changes in animals by sticking electrodes into slices of brain tissue to record electrical signals. “Obviously, we don’t do that to our friends,” Asarnow says. So his team used electroencephalography (EEG) to record electrical activity through electrodes stuck to the scalps of its subjects. The team monitored this activity as the subjects watched a certain pattern flash on a screen at high frequency for a couple minutes. Afterward, the subjects showed a spike in EEG activity in their visual cortex when they viewed the pattern at a later time. This suggested a population of neurons had wired themselves together by strengthening their synapses. © 2015 Scientific American
By Emilie Reas What makes for a long-lasting memory? Research has shown that emotional or important events take root deeply, whereas neutral or mundane happenings create weak impressions that easily fade. But what about an experience that initially seemed forgettable but was later shown to be important? Animal research suggested that these types of older memories could be strengthened, but scientists had not been able to replicate this finding in humans—until now. New evidence suggests that our initially weak memories are maintained by the brain for a period, during which they can be enhanced. In the recent study published in Nature, psychologists at New York University showed 119 participants a series of images of tools and animals. A few minutes later the subjects saw a new set of images, with an electric shock paired with either the tools or the animals, to increase the salience of just one of those categories. The participants' memories for both sets of images were then tested either immediately, six hours later or the next day. Participants remembered images from the first neutral series better if they belonged to the same category (tool or animal) that was later paired with the shock. The findings suggest that even if an event does not seem meaningful when it occurs, a later cue that the experience was important can enhance the old memory. Although research has not yet demonstrated this effect outside the laboratory, the scientists speculate it happens often in daily life. For example, imagine you meet several new people at a networking event. During a job interview days later, you discover that one of those acquaintances is on the hiring committee, and suddenly the details of your conversation at the networking event become vivid and memorable—whereas the conversations you had with others at the event fade with time. © 2015 Scientific American
By Erika Beras From the backseat of a cab, the moves a driver makes may at times seem, let’s say, daring. In fact, cabbies may actually be better, more agile drivers than the rest of us. Because they know their streets so well. Previous research found that the hippocampus in the brain of a typical cab driver is enlarged. That’s the part of the brain used in navigation. But now a study confirms that learning detailed navigation information does indeed cause that part of the brain to grow. The findings are in the journal NeuroImage. Researchers had young adults who were not regular gamers play a driving simulation game. Some practiced maneuvering the same route 20 times, while other players were confronted with 20 different routes. The participants’ brains were scanned before they performed the simulated driving and again after. Researchers found that subjects who kept repeating the same route increased their speed more than those driving multiple routes. The single-route drivers were also much better able to put in order a sequence of random pictures taken along the way and to draw a map of the route. The investigators also found increases in the single-route drivers in the functional connectivity between the hippocampus and other parts of the brain involved with navigation. And the amount of change was directly related to the amount of improvement each participant displayed. © 2015 Scientific American
Laura Sanders Specialized cells that make up the brain’s GPS system have an expanding job description. In addition to mapping locations, these cells can keep track of distance and time, too, scientists report in the Nov. 4 Neuron. Those specialized cells, called grid cells, were thought to have a very specific job, says neuroscientist Loren Frank of the University of California, San Francisco. But, he says, the new study says, “not so fast, everybody.” These cells’ ability to detect time and distance is unexpected. “And I think it’s important,” Frank says. The growing to-do list of grid cells shows that the brain’s navigational system is surprisingly flexible. The discovery of grid cells, found in a part of the brain called the entorhinal cortex, was recognized with the Nobel Prize last year (SN Online: 10/6/14). These brain cells fire off regular signals as animals move around in space, partially forming an internal map of the environment. Neuroscientist Howard Eichenbaum of Boston University and colleagues wondered what those cells do when an animal stays put. By training rats to run on a treadmill, the researchers had a way to study grid cells as time and distance marched forward, but location remained the same. Unlike recently discovered “speed cells” (SN: 8/8/15, p. 8), these grid cells don’t change their firing rates to correspond to changes in the rats’ swiftness, the researchers found. Instead, these cells stay tuned to distance or time, or both. © Society for Science & the Public 2000 - 2015.
Sara Reardon Military-service members can suffer brain injury and memory loss when exposed to explosions in enclosed spaces, even if they do not sustain overt physical injury. A strategy designed to improve memory by delivering brain stimulation through implanted electrodes is undergoing trials in humans. The US military, which is funding the research, hopes that the approach might help many of the thousands of soldiers who have developed deficits to their long-term memory as a result of head trauma. At the Society for Neuroscience meeting in Chicago, Illinois, on 17–21 October, two teams funded by the Defense Advanced Research Projects Agency presented evidence that such implanted devices can improve a person’s ability to retain memories. By mimicking the electrical patterns that create and store memories, the researchers found that gaps caused by brain injury can be bridged. The findings raise hopes that a ‘neuroprosthetic’ that automatically enhances flagging memory could aid not only brain-injured soldiers, but also people who have had strokes — or even those who have lost some power of recall through normal ageing. Because of the risks associated with surgically placing devices in the brain, both groups are studying people with epilepsy who already have implanted electrodes. The researchers can use these electrodes both to record brain activity and to stimulate specific groups of neurons. Although the ultimate goal is to treat traumatic brain injury, these people might benefit as well, says biological engineer Theodore Berger at the University of Southern California (USC) in Los Angeles. That is because repeated seizures can destroy the brain tissue needed for long-term-memory formation. © 2015 Nature Publishing Group
By Michelle Roberts Health editor, BBC News online Brain training - playing online games that give memory and reasoning skills a workout - is beneficial for older people, a large-scale study has concluded. Researchers at King's College London found the mental exercises kept minds sharp and helped people with everyday skills such as shopping and cooking. Nearly 7,000 people aged 50 and over signed up for the six-month experiment, launched by BBC TV's Bang Goes The Theory. Longer studies are now beginning. The volunteers were recruited from the general population by a partnership between the BBC, the Alzheimer's Society and the Medical Research Council. As far as the investigators were aware, none had any problems with memory or cognition when they signed up to the experiment. Some of the volunteers were encouraged to play online brain training games for 10 minutes at a time, as often as they wished. The others - the control group - were asked to do simple internet searches. The researchers tested the subjects on a series of medically recognised cognitive tests at baseline and then again at three months and six months to see if there was any detectable difference between the groups. The researchers found after six months, those who played "brain training" games for reasoning and problem-solving kept their broader cognitive skills better than those who did not. The benefit appeared to kick in when people played the games at least five times a week. And people over 60 who played these games reported better scores for carrying out essential everyday tasks, the Journal of Post-acute and Long Term Care Medicine reports. © 2015 BBC
Related chapters from BP7e: Chapter 17: Learning and Memory; Chapter 7: Life-Span Development of the Brain and Behavior
Related chapters from MM:Chapter 13: Memory, Learning, and Development; Chapter 13: Memory, Learning, and Development
Link ID: 21594 - Posted: 11.03.2015
Richard A. Friedman YOU can increase the size of your muscles by pumping iron and improve your stamina with aerobic training. Can you get smarter by exercising — or altering — your brain? Stories from Our Advertisers This is hardly an idle question considering that cognitive decline is a nearly universal feature of aging. Starting at age 55, our hippocampus, a brain region critical to memory, shrinks 1 to 2 percent every year, to say nothing of the fact that one in nine people age 65 and older has Alzheimer’s disease. The number afflicted is expected to grow rapidly as the baby boom generation ages. Given these grim statistics, it’s no wonder that Americans are a captive market for anything, from supposed smart drugs and supplements to brain training, that promises to boost normal mental functioning or to stem its all-too-common decline. The very notion of cognitive enhancement is seductive and plausible. After all, the brain is capable of change and learning at all ages. Our brain has remarkable neuroplasticity; that is, it can remodel and change itself in response to various experiences and injuries. So can it be trained to enhance its own cognitive prowess? The multibillion-dollar brain training industry certainly thinks so and claims that you can increase your memory, attention and reasoning just by playing various mental games. In other words, use your brain in the right way and you’ll get smarter. A few years back, a joint study by BBC and Cambridge University neuroscientists put brain training to the test. Their question was this: Do brain gymnastics actually make you smarter, or do they just make you better at doing a specific task? For example, playing the math puzzle KenKen will obviously make you better at KenKen. But does the effect transfer to another task you haven’t practiced, like a crossword puzzle? © 2015 The New York Times Company
Related chapters from BP7e: Chapter 17: Learning and Memory; Chapter 1: Biological Psychology: Scope and Outlook
Related chapters from MM:Chapter 13: Memory, Learning, and Development; Chapter 1: An Introduction to Brain and Behavior
Link ID: 21567 - Posted: 10.26.2015
Keikantse Matlhagela Susumu Tonegawa unlocked the genetic secrets behind antibodies' diverse structures, which earned him the Nobel Prize in Physiology or Medicine in 1987. Having since moved fields, he tells Keikantse Matlhagela about his latest work on the neuroscience of happy and sad memories. You started as a chemist, then you moved into molecular biology and now you are a neuroscientist. Why change fields? Strangely, the only people to ask me about this are journalists — my students never ask. I see myself as a scientist who is interested in what's going on inside of us. It doesn't matter whether it is chemistry or immunology or neuroscience, I just do research on what I find interesting. The switch from chemistry to immunology did not seem like a big shift when I was young, but immunology to neuroscience was. After about 15 years spent researching immunology I wanted to explore an area of science where there are still big, unresolved questions. The brain is probably the most mysterious subject there is. Do you keep up to date with the field in which you won your Nobel prize? I am sorry to say that I haven't been paying a lot of attention to immunology in recent years because I am preoccupied with my work on memory. I have friends, of course, from that time — very close friends. But my friends are not young. Even though they are experts, they are also retired. We tend not to talk about immunology a whole lot. © 2015 Macmillan Publishers Limited
By Emily Underwood CHICAGO—In 1898, Italian biologist Camillo Golgi found something odd as he examined slices of brain tissue under his microscope. Weblike lattices, now known as "perineuronal nets," surrounded many neurons, but he could not discern their purpose. Many dismissed the nets as an artifact of Golgi's staining technique; for the next century, they remained largely obscure. Today, here at the annual meeting of the Society for Neuroscience, researchers offered tantalizing new evidence that holes in these nets could be where long-term memories are stored. Scientists now know that perineuronal nets (PNNS) are scaffolds of linked proteins and sugars that resemble cartilage, says neuroscientist Sakina Palida, a graduate student in Roger Tsien's lab at the University of California,San Diego, and co-investigator on the study. Although it's still unclear precisely what the nets do, a growing body of research suggests that PNNs may control the formation and function of synapses, the microscopic junctions between neurons that allow cells to communicate, and that may play a role in learning and memory, Palida says. One of the most pressing questions in neuroscience is how memories—particularly long-term ones—are stored in the brain, given that most of the proteins inside neurons are constantly being replaced, refreshing themselves anywhere from every few days to every few hours. To last a lifetime, Palida says, some scientists believe that memories must somehow be encoded in a persistent, stable molecular structure. Inspired in part by evidence that destroying the nets in some brain regions can reverse deeply ingrained behaviors, Palida’s adviser Tsien, a Nobel-prize-winning chemist, recently began to explore whether PNNs could be that structure. Adding to the evidence were a number of recent studies linking abnormal PNNs to brain disorders including schizophrenia and Costello syndrome, a form of intellectual disability. © 2015 American Association for the Advancement of Science.
Related chapters from BP7e: Chapter 17: Learning and Memory; Chapter 2: Functional Neuroanatomy: The Nervous System and Behavior
Related chapters from MM:Chapter 13: Memory, Learning, and Development; Chapter 2: Cells and Structures: The Anatomy of the Nervous System
Link ID: 21540 - Posted: 10.21.2015
By LISA SANDERS, M.D. The middle-aged couple knocked at the door of the townhouse. When no one answered, the woman took her key and let them in. She called her daughter’s name as she hurried through the rooms. They had been trying to reach their 27-year-old daughter by phone all day, and she hadn’t answered. They found her upstairs, lying in bed and mumbling incoherently. The mother rushed over, but her daughter showed no signs of recognition. She and her husband quickly carried her to the car. Four months before, the mother told the emergency-room doctor at SSM Health St. Mary’s Hospital in St. Louis, her daughter had a procedure called gastric-sleeve surgery to help her lose weight. She came home after just a couple of days and felt great. She looked bright and eager. Once she started to eat, though, nausea and vomiting set in. After almost every meal, she would throw up. It’s an unusual but well-known complication of this kind of surgery. The cause is not clearly understood, but the phenomenon is sometimes linked to reflux. The surgeon tried different medications to stop the nausea and vomiting and to reduce the acid in her stomach, but they didn’t help. She had the surgery in order to lose weight, but now she was losing weight too quickly. After a month of vomiting, her doctors thought maybe she had developed gallstones — a common problem after rapid weight loss. But even after her gallbladder was removed, the young woman continued to vomit after eating. © 2015 The New York Times Company
Related chapters from BP7e: Chapter 17: Learning and Memory; Chapter 13: Homeostasis: Active Regulation of the Internal Environment
Related chapters from MM:Chapter 13: Memory, Learning, and Development; Chapter 9: Homeostasis: Active Regulation of the Internal Environment
Link ID: 21534 - Posted: 10.21.2015
By Hanae Armitage Schools of fish clump together for a very simple reason: safety in numbers. But for some, banding together offers more than just protection. It’s a way of getting to the head of the class. Schooling fish learn from each other, and new research shows that when they’re taken out of their normal social group, individuals struggle to learn on their own. Scientists have long known that schooling fish observe and learn from each other’s failures and successes, behaviors that stimulate neural development, especially in the part of the brain responsible for memory and learning. But this is the first time they have found evidence of that link in spatial learning. To test their theory, scientists divided a school of social cichlid fish into two categories: 14 social fish and 15 loners. Researchers kept the social fish grouped together while they partitioned the loners into single-fish isolation tanks. They ran both groups through a simple T-shaped maze, color coding the side that harbored food—a yellow mark for food, a green mark for no food. Seven of the 14 socialized fish learned to associate yellow with food (high marks for the cichlids, which are not the brightest fish in the animal kingdom), whereas only three of the 15 isolated fish successfully made the same association. Writing in this month’s issue of Applied Animal Behaviour Science, the researchers say this suggests fish in group settings are able to learn better and faster than their singled out counterparts. The moral? Simple: Fish should stay in school. © 2015 American Association for the Advancement of Science
Related chapters from BP7e: Chapter 17: Learning and Memory; Chapter 6: Evolution of the Brain and Behavior
Related chapters from MM:Chapter 13: Memory, Learning, and Development
Link ID: 21495 - Posted: 10.10.2015
Gareth Cook talks to Douwe Draaisma Much has been written on the wonders of human memory: its astounding feats of recall, the way memories shape our identities and are shaped by them, memory as a literary theme and a historical one. But what of forgetting? This is the topic of a new book by Douwe Draaisma, author of The Nostalgia Factory: Memory, Time and Ageing (Yale University Press, 2013; 176 pages) and a professor of the history of psychology at the University of Groningen in the Netherlands. In Forgetting: Myths, Perils and Compensations (Yale University Press, 2015; 288 pages), Draaisma considers dreaming, amnesia, dementia and all the ways in which our minds—and lives—are shaped by memory’s opposite. He answered questions from contributing editor Gareth Cook. What is your earliest memory, and why, do you suppose, have you not forgotten it? Quite a few early memories in the Netherlands involve bicycles; mine is no exception. I was two and a half years old when my aunts walked my mother to the train station. They had taken a bike to transport her bags. I was sitting on the back of the bike. Suddenly the whole procession came to a halt when my foot got caught between the spokes of a wheel. I am pretty sure this memory is accurate because I had to see a doctor, and there is a dated medical record. It is a brief, snapshotlike memory, black-and-white. I do not remember any pain, but I do remember the consternation among my mom and her sisters. Looking back on this memory from a professional perspective, I would say that it has the flashlike character typical for first memories from before age three; “later” first memories are usually a bit longer and more elaborate. © 2015 Scientific American
By Lisa Sanders, M.d. On Thursday we challenged Well readers to solve the case of a 27-year-old woman who had vomiting, weakness and confusion months after having weight loss surgery. More than 200 readers offered their perspective on the case. Most of you recognized it as a nutritional deficiency, and nearly half of you totally nailed it. The diagnosis is: Wernicke’s encephalopathy due to thiamine (vitamin B1) deficiency. The very first reader to post a comment, Dr. Adrian Budhram, figured it out. His answer landed on our doorstep just five minutes after the case went up. Dr. Budhram is a second year neurology resident at Western University in London, Ontario. He says that Wernicke’s is on the list of diseases he thinks about every time someone is brought to the hospital because they are confused. Thiamine, or vitamin B1, is a nutrient essential for the body to break down and use sugars and proteins. It is found in many foods, including beans, brown rice, pork and cereals. Although the body only stores enough of the vitamin to last three to four weeks, deficiencies are rare when a full and varied diet is available. Diseases caused by a thiamine deficiency were described in Chinese medicine as early as 2600 B.C. – well before the vitamin was identified chemically. Western medicine came to know the disease as beriberi – a Sinhalese term meaning weak (apparently from the phrase “I can’t, I can’t”) characterized by either numbness and weakness in the legs (dry beriberi) or a weakened heart leading to hugely swollen legs (wet beriberi). © 2015 The New York Times Company
Erin Wayman Priya Rajasethupathy’s research has been called groundbreaking, compelling and beautifully executed. It’s also memorable. Rajasethupathy, a neuroscientist at Stanford University, investigates how the brain remembers. Her work probes the molecular machinery that governs memories. Her most startling — and controversial — finding: Enduring memories may leave lasting marks on DNA. Being a scientist wasn’t her first career choice. Although Rajasethupathy inherited a love of computation from her computer scientist dad, she enrolled in Cornell University as a pre-med student. After graduating in three years, she took a year off to volunteer in India, helping people with mental illness. During that year she also did neuroscience research at the National Centre for Biological Sciences in Bangalore. While there, she began to wonder whether microRNAs, tiny molecules that put protein production on pause, could play a role in regulating memory. She pursued that question as an M.D. and Ph.D. student at Columbia University (while intending, at least initially, to become a physician). She found some answers in the California sea slug (Aplysia californica). In 2009, she and colleagues discovered a microRNA in the slug’s nerve cells that helps orchestrate the formation of memories that linger for at least 24 hours. © Society for Science & the Public 2000 - 2015.
We all have our favourite movie moments, ones we love to watch again from time to time. Now it seems chimpanzees and bonobos, too, have the nous to recall thrilling scenes in movies they have previously seen and anticipate when they are about to come up. The results suggest apes can readily recall and anticipate significant recent events, just by watching those events once. Rather than use hidden food as a memory test, Japanese researchers made short movies and showed them to apes on two consecutive days. “We showed a movie instead, and asked whether they remember it when they only watch an event once, and an event totally new to them,” says Fumihiro Kano of Kyoto University in Japan. “Their anticipatory glances told us that they did.” Plot moment Kano and his colleague Satoshi Hirata made and starred in two short films. Another of the characters was a human dressed up as an ape in a King Kong costume who carried out attacks on people, providing the key plot moment in the first movie (see video). Both films were designed to contain memorable dramatic events, and the researchers deployed laser eye-tracking technology to see if the animals preferentially noticed and remembered these moments. © Copyright Reed Business Information Ltd.
By AMY HARMON Some neuroscientists believe it may be possible, within a century or so, for our minds to continue to function after death — in a computer or some other kind of simulation. Others say it’s theoretically impossible, or impossibly far off in the future. A lot of pieces have to fall into place before we can even begin to start thinking about testing the idea. But new high-tech efforts to understand the brain are also generating methods that make those pieces seem, if not exactly imminent, then at least a bit more plausible. Here’s a look at how close, and far, we are to some requirements for this version of “mind uploading.” The hope of mind uploading rests on the premise that much of the key information about who we are is stored in the unique pattern of connections between our neurons, the cells that carry electrical and chemical signals through living brains. You wouldn't know it from the outside, but there are more of those connections — individually called synapses, collectively known as the connectome — in a cubic centimeter of the human brain than there are stars in the Milky Way galaxy. The basic blueprint is dictated by our genes, but everything we do and experience alters it, creating a physical record of all the things that make us US — our habits, tastes, memories, and so on. It is exceedingly tricky to transition that pattern of connections, known as the connectome, into a state where it is both safe from decay and can be verified as intact. But in recent months, two sets of scientists said they had devised separate ways to do that for the brains of smaller mammals. If either is scaled up to work for human brains — still a big if — then theoretically your brain could sit on a shelf or in a freezer for centuries while scientists work on the rest of these steps. © 2015 The New York Times Company
Related chapters from BP7e: Chapter 17: Learning and Memory; Chapter 18: Attention and Higher Cognition
Related chapters from MM:Chapter 13: Memory, Learning, and Development; Chapter 14: Attention and Consciousness
Link ID: 21407 - Posted: 09.14.2015