Telepathic control of another person’s body is a small step closer. By linking the technologies of two brain/computer interfaces, human volunteers were able to trigger movement in a rat’s tail using their minds.
Recently, researchers linked the brains of two rats so that they worked together to accomplish a task. Such techniques are unlikely to be applied to humans any time soon because they require invasive surgery to implant electrodes into the brain.
Now Seung-Schik Yoo of Harvard Medical School in Boston and colleagues have created a system that connects a human to a rat via a computer, without the need for the human or the rat to have brain implants.
The human volunteers wore electrode caps that monitored their brain activity using electroencephalography (EEG). Meanwhile, an anaesthetised rat was hooked up to a device that made the creature’s neurons fire whenever it delivered an ultrasonic pulse to the rat’s motor cortex.
When monitoring the human’s brain activity, the researchers looked for a specific EEG pattern known to correspond to visual stimulation. As the volunteers watched a strobe light blinking on a computer screen, the EEG wave synchronised to match the frequency of the strobe (see the "SSVEP" line on video, above).
But when they switched to concentrating on moving the rat’s tail, the change in their focus disrupted the EEG, triggering a signal to be sent to the computer. The computer translated this signal into an ultrasonic pulse, which stimulated the rat’s motor cortex, causing its tail to move. Using this system, all six of the volunteers were able to trigger movement in the rat’s tail with little difficulty.
Yoo says it should be possible for two humans to use a similar system in the foreseeable future. Such a system could, for instance, be used to help a paralysed person relearn to use their limbs by having their therapist initially move them with their mind.
But Ricardo Chavarriaga at the Swiss Federal Institute of Technology (EPFL) in Lausanne and others say that while the experiment is an interesting application of the two technologies, linking them together does not reveal much about the ability to link two brains.
Because the rat was anaesthetised to isolate the effect of the intervention, he says it is not clear that the experiment realistically models what would happen if a conscious brain was stimulated this way.
Scary Times For California Farmers As Snowpack Hits Record Lows 2015-04-02 2:45
The water outlook in drought-racked California just got a lot worse: Snowpack levels across the entire Sierra Nevada are now the lowest in recorded history â€” just 6 percent of the long-term average. That shatters the previous low record on this date of 25 percent, set in 1977 and again last year.
Morning traffic makes its way toward downtown Los Angeles ...
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Editor's Note: Unfortunately this is not an April Fools story.
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â€śUsâ€ť and â€śThemâ€ť 2015-04-01 22:30
Iâ€™ve decided to translate yet another one of Julia Caesarâ€™s popular Sunday chronicles available in Swedish on the website Snaphanen. This one is named â€śUs and Themâ€ť and concerns a scandal of epic proportions, the Swedish governments â€śsociety coachâ€ť program. The plan was for the coaches to assist newly arrived immigrants with getting jobs and becoming integrated into society.
The Expulsion and Extermination of Eastern European Germans: An Overview 2015-04-01 17:40 "Since the end of the war about 3,000,000 people, mostly women and children and overaged men, have been killed in eastern Germany and south-eastern Europe; about 15,000,000 people have been deported or had to flee from their homesteads and are on the road. About 25 per cent of these people, over 3,000,000 have died. About 4,000,000 men and women have ...
Your Smartphone Could be Tracking You Every 3 Minutes, Study Says 2015-04-01 2:24
Your apps want to know where you are
Smartphone apps regularly collect large amounts of data on usersâ€™ locations, sometimes as often as every three minutes, new research suggests.
Researchers at Carnegie Mellon University conducted a study where they asked 23 people to use their Android smartphones normally, and tracked location data requests from each device with specially designed software, the Wall ...