Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Measuring Brain-Signals with neither goo nor shampoo - Fraunhofer scientists present first dry EEG on NIPS

10.12.2008
On December the 9th, 2008, scientists of the Fraunhofer Institute for Computer Architecture and Software Technology present the first prototype for a dry EEG (electroencephalogram). The device is shown on the NIPS (Neural Information Processing Systems Conference) in Vancouver, Canada.

It is based on six distributed contact electrodes that measure brain signals on the scalp. The voltage produced is strong enough to reliably extract EEG potentials in the microvolt range.

Before measuring can be undertaken, ordinary EEG devices have to be mounted on the patients head in a lengthy, time-consuming process. The single electrodes have to be filled with electrolyte gel to achieve electrical contact with the scalp. Setting up such a device takes about 30 minutes. Fraunhofer Scientists now present an alternative that shortens the process to about two minutes.

For this purpose, the scientists constructed a flexible helmet with six electrode arrays (multiple pins arranged in electrode sockets) as well as one reference electrode. The prototype will be used mainly for research purposes - especially in the field of Brain-Computer Interfaces (BCIs). In BCIs, brain signals are measured by means of an EEG, then classified and converted into control signals for the computer. Test persons can think about moving their right or left hand and then cause a cursor on a computer screen to be moved, just by using their imagination. At the NIPS, Fraunhofer researchers demonstrate for the first time how a BCI can be used with a dry electrode cap. A volunteer test person controls a computer game by means of his brain signals.

Preceding the presentation the scientists conducted a study with five healthy test persons. It was published in the scientific journal PLoS ONE. The study aimed at comparing the performance of a standard 64-electrode EEG with the new dry cap. The prototype was an average of 30% slower than the standard device (9,6 vs 14,9 bits/m), but performed just as well as the standard gel-based cap in terms of of maximum transmission rate (36,5 rsp.35,4 bits/m) and reliability (94, 5 rsp. 98% correctly analysed signals). This opens up new perspectives, especially for research in Brain-Computer Interfaces and the use of BCIs for severely disabled patients.

Approximately 1.3 million Euros in funding is being provided for the development of the dry cap under the EU's 6th Framework Programme for Research and Technological Development in connection with the Brain2Robot project.

We will happy to comply you with picture material on request. Further information is available from:
Press contact Fraunhofer FIRST
Mirjam Kaplow
Tel.: +49 (0) 30/ 6392-1823
E-mail: mirjam.kaplow@first.fraunhofer.de

Mirjam Kaplow | idw
Further information:
http://www.first.fraunhofer.de

More articles from Information Technology:

nachricht NASA CubeSat to test miniaturized weather satellite technology
10.11.2017 | NASA/Goddard Space Flight Center

nachricht New approach uses light instead of robots to assemble electronic components
08.11.2017 | The Optical Society

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>