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Scientists have constructed an Internet-based brain-to-brain link between a rat in North Carolina and one in Brazil.

Here's the simple version:

The brains of two rats are connected by an Internet-based communications channel. Scientists taught one of the rats how to solve a simple puzzle. When confronted with the same puzzle, the other rat went straight to the answer; the scientists believe the first rat passed the solution to the second across the link.

For instance, one of the rats was taught how to obtain a drink of water; confronted with an identical situation the second rat immediately knew how to get the drink.

The project is led by Miguel Nicolelis who's research lab has summarised the research.

According to the report, A brain-to-brain interface (BTBI) enabled a real-time transfer of behaviorally meaningful sensorimotor information between the brains of two rats. In this BTBI, an ''encoder'' rat performed sensorimotor tasks that required it to select from two choices of tactile or visual stimuli. While the encoder rat performed the task, samples of its cortical activity were transmitted to matching cortical areas of a ''decoder'' rat using intracortical microstimulation (ICMS). The decoder rat learned to make similar behavioral selections, guided solely by the information provided by the encoder rat's brain. These results demonstrated that a complex system was formed by coupling the animals' brains, suggesting that BTBIs can enable dyads or networks of animal's brains to exchange, process, and store information and, hence, serve as the basis for studies of novel types of social interaction and for biological computing devices.

The report is presented in its entirety here.

What this means is that what the first rat learned, the second rat could immediately use to its advantage.

All manner of uses have been suggested to arise from this from the fanciful to the incredibly useful. For instance, it may serve as a tool for patients with locked-in syndrome and, at the other extreme, it may be the precursor to some form of hive mind, involving all humanity connected to a single interface. Who knows, perhaps Skynet actually turns out to be us!

"I don't think there's any risk of supersmart rats from this," said Anders Sandberg, who studies the ethics of neurotechnologies at the Future of Humanity Institute at Oxford University. "There's a big difference between sharing sensory information and being able to plan. I'm not worried about an imminent invasion of 'rat multiborgs'."

The obvious question (to iTWire at least) remains unanswered; what is the nature of the signals transmitted between the two rats? This requires us to ask, what exactly is a thought, a memory, an action; how is it expressed in data; in numerical form?

Clearly this is an early step in a very long line of research.

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David Heath

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David Heath has over 25 years experience in the IT industry, specializing particularly in customer support, security and computer networking. Heath has worked previously as head of IT for The Television Shopping Network, as the network and desktop manager for Armstrong Jones (a major funds management organization) and has consulted into various Australian federal government agencies (including the Department of Immigration and the Australian Bureau of Criminal Intelligence). He has also served on various state, national and international committees for Novell Users International; he was also the organising chairman for the 1994 Novell Users' Conference in Brisbane. Heath is currently employed as an Instructional Designer, building technical training courses for industrial process control systems.

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