It’s always been one of our dreams… to be able to direct our dreams. it’s known as lucid dreaming. A dream state where you are totally or partially aware of being in a dream and being able to act and direct yourself and others within it. Imagine being the star, director, and scriptwriter for your own ultra-realistic dream-film!
Scientists have discovered that it is possible to induce lucid dreaming in sleepers by applying mild electrical currents to their scalps, a recent study reported in the publication Nature Neuroscience says.
Professor J Allan Hobson, from Harvard Medical School co-authored the paper. He said:
“The key finding is that you can, surprisingly, by scalp stimulation, influence the brain. And you can influence the brain in such a way that a sleeper, a dreamer, becomes aware that he is dreaming.”
It is a continuation of previous research in this field led by Dr Ursula Voss of Johann Wolfgang Goethe-University in Germany who said:
“Lucid dreaming is a very good tool to observe what happens in the brain and what is causally necessary for secondary consciousness.”
Prof. Hobson also thought it could have medical benefits:
“As a model for mental illness, understanding lucid dreaming is absolutely crucial. “I would be cautious about interpreting the results as of direct relevance to the treatment of medical illnesses, but [it’s] certainly a step in the direction of understanding how the brain manages to hallucinate and be deluded.”
By examining the sleepers’ REM (Rapid Eye Movements- the indicator of deep sleep dreaming) and brainwaves over a range of frequencies, scientists have found that lucid dreamers demonstrate a shift towards a more “awake-like” state in the frontal and temporal parts of the brain, with the peak in increased activity occurring around 40Hz.
The study involved 27 volunteers, none of whom had experienced lucid dreaming before. The researchers waited until the volunteers were experiencing uninterrupted REM sleep before applying electrical stimulation to the frontal and temporal positions of the volunteers’ scalps. The applied stimulation had a variety of frequencies between two and 100Hz, but neither the experimenter nor the volunteer was informed which frequency was used, or even whether a current was applied. Five to 10 seconds later the volunteers were roused from their sleep and asked to report on their dreams. Brain activity was monitored continuously throughout the experiment.
The results showed that stimulation at 40Hz (and to a lesser extent at 25Hz) resulted in an increase in brain activity of around the same frequency in the frontal and temporal areas. They found that such stimulation, more often than not, induced an increased level of lucidity in the dreams of the sleepers.
The authors suggest triggering lucid dreaming in sleepers might enable them to control nightmares, for example returning soldiers suffering with PTSD; post-traumatic stress disorder.
But for others, the chance to be “awake within a dream” may be possible… perhaps a dream come true?
In the blue corner we have Stephen Hawking, representing mankind; world renowned physicist, presenter, philosopher and cosmologist, author of the blockbusting book “A Brief History of Time”, and a brain the size of a small planet.
In the red corner, a computer. Or a computer programme, perhaps, representing AI. Artificial Intelligence.
Seconds, away, Round One. Well, not just yet, this is to be a future bout of boxing, in the not too distant future. Humankind versus AI. Some would say it should never be a contest at all. We humans invented AI, and can control it. It is our baby, our spawn of the future, and it can never bite the hand that feeds…. or can it? Stephen Hawking thinks AI is a threat to all our futures…
Stephen Hawking, in an interview with a UK Sunday paper is quoted thus:
“Success in creating AI would be the biggest event in human history. Unfortunately, it might also be the last.”
Hawking thinks we are moving too quickly, too far, without considering the possiblerepercussions. Fromdigital personal assistants to self-driving cars- he believes we’re on the cusp of the kinds of artificial intelligence that were previously exclusive to science fiction films. Shades of 2001: A Space Odyssey and Hal 9000 and I, Robot? The possibility of smart robots roaming the streets is not so far-fetched. he basically asks who will control AI when AI becomes programmed to control itself?
It’s not just that there may be massive unemployment due to robotisation, if a robot is sufficiently intelligently programmed to consider itself “aware” or even “alive” then why would it allow anyone to control it, or worse still, switch it off? If the answer is no, then we could be on the way to a global conflict between humans and robots. Pure fantasy? Stephen Hawking doesn’t think so. Perhaps we should start dumbing down drones already….
Let’s imagine (or scroll forward if you think it definitely will happen) we manage to cure ageing, both in the body and in the mind. We have immortality. Nice. But how would we be able to cope with the infinitely accumulating number of memories and things to remember?
Memory is a funny old thing. We do get more forgetful as we get older. Yet we still have retained and lodged forever in our memory certain events, numbers, faces, facts and triggers. Even though brain cells die at a quicker rate as we get older, we must assume that immortality will include the ability for the brain to regenerate itself. So our capacity to think is unimpaired because our brains will remain functioning.
But what of memory? Research indicates that there is a certain part of the brain where memories reside. But it is of a finite size. As more and more experiences and memories are accumulated throughout the centuries and aeons of our immortality, that part of the brain will just become clogged and full and unable to absorb any more information. It would also be difficult if not impossible to recall information because there are so many full rooms,corridors and halls all full of filing cabinets, full of folders, full of papers.
Your brain can keep all that stuff organized for a while (say, the span of most of a normal human lifetime) but it’s not like you can go into your brain and just delete files like cleaning up a hard drive of a computer.
Your immortal life and experiences may be infinite, but your brain’s ability to store and recall them is not. After a relatively short time into your immortality, as early as 300 years old, your brain will be chock-a-block piled up with information/junk like one of the habitual hoarders who can never clean up or throw anything out.
The only possible solution would appear to be to connect to technology that could store, sort and recall all that information- and perhaps delete it to. “Total Recall” anyone? So perhaps at 30o years old plus you’ll be permanently wired in to a data/memory dump/recall system. But your biological brain’s ability to process the information and retain it, would not be expanded once it has received the input from the memory card or whatever. And of course you might forget that you have stored the information remotely and so the whole system falls down again!
There are some World Cup Football Teams who you may think need a miracle in order to win the coveted World Cup. But a miracle, of sorts, will take place on the football pitch of the Arena Corinthians in São Paulo at the opening ceremony of the World Cup at 5pm 12 June (local time). A young Brazilian will take a kick of a football on the centre spot.
But this is no ordinary young man, nor is the kick trivial. The boy, yet to be chosen from a shortlist of nine aged between 20 and 40,will be a paraplegic. He will rise from his wheelchair and walk to the midfield and then kick the ball. How?
It’s down to Miguel Nicolelis and his team of neuro-engineers and scientists at Duke University in North Carolina. And if the event works as intended, it should spell the end for wheelchairs, and the evolution of mind-controlled exoskeleton robots. Here’s a picture of the robot:
The mind-controlled robotic exoskeleton is a complex robotic suit built from lightweight alloys and powered by hydraulics. When a paraplegic person straps themselves in, the machine does the job that their leg muscles no longer can. But there are no buttons levers or controls to tell the robot what to do. Only the human brain.
The exoskeleton is the culmination of years of work by an international team of scientists and engineers on the Walk Again project. The robotics work was coordinated by Gordon Cheng at the Technical University in Munich and the French researchers built the exoskeleton. Nicolelis’ team focused on what many say is the most difficult bit; ways to read people’s brain waves, and use those signals to control robotic limbs.
To operate the exoskeleton, the person is helped into the suit and given a cap to wear that is fitted with electrodes to pick up their brain waves. These signals are passed to a computer worn in a backpack, where they are decoded and used to move hydraulic drivers on the suit. There’s a battery that powers everything, with a two hour life before it needs re-charging.
The operator’s feet rest on plates which have sensors to detect when contact is made with the ground. With each footstep, a signal is transmitted to a vibrating device sewn into the forearm of the wearer’s shirt. The device fools the brain into thinking that the sensation came from their foot. In virtual reality simulations, patients felt that their legs were moving and touching something. Here’s a diagram showing the details.
Last month, Nicolelis and his colleagues went to some football matches in São Paulo to check whether mobile phone radiation from the crowds might interfere with the suit. Electromagnetic waves could make the exoskeleton misbehave, but they were reassured.
This is ground-breaking robotic/artificial intelligence/mind-control technology all rolled into one: Let’s keep our fingers crossed that we will all witness the miracle first kick of the World Cup on 12 June.
In a recent study by Harvard Medical School, which used data going back to the 1970s, Professor of medicine Francine Grodstein concluded that “diet makes a difference”. Plain and simple.
“The higher our body weight and body mass index, the less likely we are to live older, happier, healthier lives,” she said.
Well you may have preferred to hear about a breakthrough in a longevity magic bullet, or transferring DNA from animals that live for over 150 years to humans, but there’s no getting away from it. If you reduce your food intake by just a fifth, you will live a longer life. This has been shown in animals too- reducing bodyweight by 20% in mice increased their lifespans.
William Mair, HSPH assistant professor of genetics and complex diseases, said a study that has gained a lot of attention found that reducing body weight by 20 percent in mice increased their longevity. It is even true for insects such as the fruit fly.
By cutting down our food intake and body mass, we won’t live forever, but the quality of life should be better for longer. In other words all the morbidities that can afflict us will be pushed back to the last years of our lives.
Turning to avoiding mental disease, a promising area in warding off dementia involves taking up a personal challenge such as learning to play an instrument or to speak another language, said Thomas Perls, a Boston University professor of medicine and director of the New England Centenarian Study. However building up these mental functional reserves that seem to stave off or delay dementia don’t seem to apply to everyone. The brainiest most mentally advanced people can still succumb to dementia.