Yes/No Neural Interface Partly Works

February 2, 2017 by Elliot Williams 19 Comments

It sounds like something out of a sci-fi or horror movie: people suffering from complete locked-in state (CLIS) have lost all motor control, but their brains are otherwise functioning normally. This can result from spinal cord injuries or anyotrophic lateral sclerosis (ALS). Patients who are only partially locked in can often blink to signal yes or no. CLIS patients don’t even have this option. So researchers are trying to literally read their minds.

Neuroelectrical technologies, like the EEG, haven’t been successful so far, so the scientists took another tack: using near-infrared light to detect the oxygenation of blood in the forehead. The results are promising, but we’re not there yet. The system detected answers correctly during training sessions about 70% of the time, where the upper bound for random chance is around 65% — varying from trial to trial. This may not seem overwhelmingly significant, but repeating the question many times can help improve confidence in the answer, and these are people with no means of communicating with the outside world. Anything is better than nothing?

It’s noteworthy that the blood oxygen curves over time vary significantly from patient to patient, but seem roughly consistent within a single patient. Some people simply have patterns that are easier to read. You can see all the data in the paper.

They go into the methodology as well, which is not straightforward either. How would you design a test for a person who you can’t even tell if they are awake, for instance? They ask complementary questions (“Paris is the capital of France”, “Berlin is the capital of Germany”, “Paris is the capital of Germany”, and “Berlin is the capital of France”) to be absolutely sure they’re getting the classifications right.

It’s interesting science, and for a good cause: improving the quality of life for people who have lost all contact with their bodies. (Most of whom answered “yes” to the statement “I am happy.” Food for thought.)

Via Science-Based Medicine, and thanks to [gippgig] for the unintentional tip! Photo from the Wyss Center, one of the research institutes involved in the study.

Amino Wants To Bring Bioengineering To Your Workbench

October 23, 2015 by Cameron Coward 28 Comments

As the maker movement has exploded in popularity in recent years, there has been a strong push to put industrial tools into the hands of amateur tinkerers and hackers. CNC mills, 3D Printers, and laser cutters were all extremely expensive machines that were far too costly for most people until makers demanded them and hackers found ways to make them affordable. But, aside from the home brewing scene, those advancements haven’t really touched on anything organic. Which is a deficiency that Amino, a desktop bioengineering system, is seeking to address.

Amino, created by [Julie Legault], is currently seeking crowd-funding via Indiegogo. Hackaday readers are more suspicious than most when it comes to crowd-funding campaigns, and with good reason. But, [Julie Legault] has some very impressive credentials that lend her a great deal of credibility. She has four degrees in the arts and sciences, including a Masters of Science at the MIT Media Lab.

It was for that degree at MIT that [Julie] started Amino as her thesis. Her plan is to bring the tools necessary for bioengineering to the masses – tools which are traditionally only available in research labs. Those tools are packaged into a small desktop-sized unit called Amino. Backers will receive this desktop system, along with the supplies for their first project. Those projects are predefined, but the tools are versatile enough to allow users to move on to their own projects in the future. [Julie] thinks that the future is in bioengineering, and that the best way to feed innovation is to make the necessary tools both affordable and accessible.

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