Since the obsession with Twitter in the PR industry continues unabated, and because it's incredible science, I'm obliged to blog a pitch from the University of Wisconsin-Madison today.

Engineering doctoral student Adam Wilson came up with a computer-brain interface that allows you to Tweet merely by thinking.

Before you run out to have one installed so you can Tweet discreetly during boring meetings, or drop a leaks to the media at the very moment you're hearing the dirt, remember this are for people who need them. The mashup of Twitter and a brain-computer interface (BCI) presents hope for those afflicted with "amyotrophic lateral sclerosis (ALS), brain-stem stroke or high spinal cord injury" as the press release states.

Amazingly, BCIs are not new. In 2004, a young man named Matthew Nagle learned how to operate a prosthetic arm, and play Pong by using his thoughts. You can read about Nagle in MIT's Technology Review.

The full press release from UWM is after the jump:

RESEARCHERS USE BRAIN INTERFACE TO POST TO TWITTER

MADISON - In early April, Adam Wilson posted a status update on the social networking Web site Twitter - just by thinking about it.

Just 23 characters long, his message, "using EEG to send tweet," demonstrates a natural, manageable way in which "locked-in" patients can couple brain-computer interface technologies with modern communication tools.

A University of Wisconsin-Madison biomedical engineering doctoral student, Wilson is among a growing group of researchers worldwide who aim to perfect a communication system for users whose bodies do not work, but whose brains function normally. Among those are people who have amyotrophic lateral sclerosis (ALS), brain-stem stroke or high spinal cord injury.

Some brain-computer interface systems employ an electrode-studded cap wired to a computer. The electrodes detect electrical signals in the brain - essentially, thoughts - and translate them into physical actions, such as a cursor motion on a computer screen. "We started thinking that moving a cursor on a screen is a good scientific exercise," says Justin Williams, a UW-Madison assistant professor of biomedical engineering and Wilson's adviser. "But when we talk to people who have locked-in syndrome or a spinal-cord injury, their No. 1 concern is communication."

In collaboration with research scientist Gerwin Schalk and colleagues at the Wadsworth Center in Albany, N.Y., Williams and Wilson began developing a simple, elegant communication interface based on brain activity related to changes in an object on screen.

The interface consists, essentially, of a keyboard displayed on a computer screen. "The way this works is that all the letters come up, and each one of them flashes individually," says Williams. "And what your brain does is, if you're looking at the 'R' on the screen and all the other letters are flashing, nothing happens. But when the 'R' flashes, your brain says, 'Hey, wait a minute. Something's different about what I was just paying attention to.' And you see a momentary change in brain activity."

Wilson, who used the interface to post the Twitter update, likens it to texting on a cell phone. "You have to press a button four times to get the character you want," he says of texting. "So this is kind of a slow process at first."

However, as with texting, users improve as they practice using the interface. "I've seen people do up to eight characters per minute," says Wilson.

A free service, Twitter has been called a "micro-blogging" tool. User updates, called tweets, have a 140-character limit - a manageable message length that fits locked-in users' capabilities, says Williams.

Tweets are displayed on the user's profile page and delivered to other Twitter users who have signed up to receive them. "So someone could simply tell family and friends how they're feeling today," says Williams. "People at the other end can be following their thread and never know that the person is disabled. That would really be an enabling type of communication means for those people, and I think it would make them feel, in the online world, that they're not that much different from everybody else. That's why we did these things."

Schalk agrees. "This is one of the first - and perhaps most useful - integrations of brain-computer interface techniques with Internet technologies to date," he says.

While widespread implementation of brain-computer interface technologies is still years down the road, Wadsworth Center researchers, as well as those at the University of Tubingen in Germany, are starting in-home trials of the equipment. Wilson, who will finish his Ph.D. soon and begin postdoctoral research at Wadsworth, plans to include Twitter in the trials.

Williams hopes the Twitter application is the nudge researchers need to refine development of the in-home technology. "A lot of the things that we've been doing are more scientific exercises," he says. "This is one of the first examples where we've found something that would be immediately useful to a much larger community of people with neurological deficits."

Funding for the research comes from the National Institutes of Health, the UW-Madison Institute for Clinical and Translational Research, the UW-Madison W.H. Coulter Translational Research Partnership in Biomedical Engineering and the Wisconsin Alumni Research Foundation.

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