Tag Archives: brain

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Mind control – non-invasive mind-machine interface

OK, so it’s crude, but it’s a start – boffins at the Honda Research Institute have built a helmet packed with electronics that enables its wearer to control the movement of a robot just by thinking about it:

The helmet is the first “brain-machine interface” to combine two different techniques for picking up activity in the brain. Sensors in the helmet detect electrical signals through the scalp in the same way as a standard EEG (electroencephalogram). The scientists combined this with another technique called near-infrared spectroscopy, which can be used to monitor changes in blood flow in the brain.

Brain activity picked up by the helmet is sent to a computer, which uses software to work out which movement the person is thinking about. It then sends a signal to the robot commanding it to perform the move. Typically, it takes a few seconds for the thought to be turned into a robotic action.

Honda said the technology was not ready for general use because of potential distractions in the person’s thinking. Another problem is that brain patterns differ greatly between individuals, and so for the technology to work brain activity must first be analysed for up to three hours.

Well, a calibration period is inevitable; I expect they’ll shave that timescale down considerably, and in fairly short order. And then it’ll just be a case of waiting a decade or so before applying to be a mecha-warrior, like the strung-out teenagers in Ian McDonald’s story “Sanjeev and Robotwallah”.

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The silicon brain

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neural networkMost attempts to simulate the function of organic brains using computers have been software simulations – models built with code, if you like. An international team of computer scientists have been trying the other approach, however: building computer hardware that mimics the dense interconnection of brain cells.

The hope is that recreating the structure of the brain in computer form may help to further our understanding of how to develop massively parallel, powerful new computers, says Meier.

This is not the first time someone has tried to recreate the workings of the brain. One effort called the Blue Brain project, run by Henry Markram at the Ecole Polytechnique Fédérale de Lausanne, in Switzerland, has been using vast databases of biological data recorded by neurologists to create a hugely complex and realistic simulation of the brain on an IBM supercomputer.

[snip]

The advantage of this hardwired approach, as opposed to a simulation, Karlheinz continues, is that it allows researchers to recreate the brain-like structure in a way that is truly parallel. Getting simulations to run in real time requires huge amounts of computing power. Plus, physical models are able to run much faster and are more scalable. In fact, the current prototype can operate about 100,000 times faster than a real human brain. “We can simulate a day in a second,” says Karlheinz.

A day in a second, huh? That’s straight out of your favourite Singularity sf story, right there. [image by neurollero]

Transhumanists talk a great deal about the inevitability of human-equivalent artificial intelligence in the very near future, and it’s easy to dismiss them as dreamers until you read an article like this. I’m not saying that silicon brainware means the Singularity is inevitable, or even likely… but I think I’ll start learning to speak in machine code. Y’know, just in case.

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The memory switch

MRI brain scanOur relentless mapping of our own grey matter continues, and here’s the latest result:

Researchers have found a telltale mental signature that predicts whether an experience will be remembered. Once deciphered, the signals could be used to help people know when their brains are primed to remember, perhaps using an iPhone app.

It doesn’t sound all that impressive, does it, even with the flippant mention of  JesusPhone compatibility further down the line – it’s easy to become blase about these stories when you collect them every day. Technology that monitors and interacts with the brain is becoming commonplace, but the real implications here are surely far bigger than having a PDA tell you when you’re primed for memory tricks.

Biofeedback, for example. Wire someone up to an EEG, and eventually they can consciously control the lines on the screen by watching them; so, with more complex monitoring systems, think of all the other stuff you could train a brain to do better. With memory as an example, perhaps you could train yourself to be in a highly receptive state at all times – that would be a pretty handy skill for spying without carrying any hardware.

But then there’s the flipside – you could train for forgetfulness too, which might make stories like Marissa’s “Erasing the Map” into reality. And the more we learn about the mind as a ‘black box’ system, the closer we come to being able to simulate one on non-biological hardware – which is one of the steps that Kurzweil and others claim are part of the road toward true Artificial Intelligence and brain uploading… [image by jsmjr]

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Thought-controlled wheelchair developed in Italy

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The Thinker Researchers led by Matteo Matteucci at Milan’s Polytechnical Institute say they’ve developed a wheelchair that obeys mental signals sent to a computer. (Via PhysOrg.)

The user is connected to a computer with electrodes on his or her scalp, and sends a signal by concentrating for a few seconds on the name of the desired destination — kitchen, bedroom, bathroom — displayed on a screen.

The computer then guides the wheelchair to the selected room using a preset programme.

“We don’t read minds, but the brain signal that is sent,” Matteucci said.

The chair is equipped with two laser beams that can detect obstacles.

The researchers think the wheelchair could be available commercially within five to 10 years, and claim it would only cost 10 percent more than a standard motorized wheelchair. They’re also working on getting the chair to operate outside using GPS.

They also note that other researchers around the world are working on similar projects, and suggests that a research consortium should be set up to coordinate the work and find the best approach for these kinds of brain-computer interfaces.

(What I really wanted for the image to illustrate this was Rodin’s sculpture, above, sitting in a wheelchair, but alas, it was beyond my Photoshopping skills.)

(Image: Wikimedia Commons.)

[tags]computers,technology,brain,handicapped[/tags]

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Brain control with light: neuroengineering at MIT

Just a nod to a must-read article at Wired on the new1 technology of neuroengineering:

Boyden directs MIT’s Neuroengineering and Neuromedia Lab, part of the MIT Media Lab. He explains the mission of neuroengineering this way: “If we take seriously the idea that our minds are implemented in the circuits of our brains, then it becomes a top priority to understand how to engineer brains for the better.”

Here, neuroscience is not merely studied, it is applied. Which is why we’re off again, to see the molecular engineer’s microscope, the viral growing area, and the machine where they cut micron-thin slices of mouse brains in order to evaluate what changes they’ve made using the rest of the equipment.

This video illustrates one of the most potentially disruptive technologies ever:

1:Although the article points out that, depending on how far you expand the definition, human beings have been “neuroengineering” for all history.