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Tapping the brain orchestra
Date:12/12/2011

al field potential" or simply LFP. We have found that if nerve cells are babbling randomly on top of each other and out of sync, the electrode's reach is narrow so that it can only receive signals from nerve cells less than about 0.3 millimetres away. However, when nerve cells are speaking simultaneously and in sync, the range can be much wider," Einevoll says.

Large treatment potential

Better understanding of the electrical brain signals may directly influence diagnosing and treatment of illnesses such as epilepsy.

"Electrodes are already being used to measure brain cell activity related to seizures in epilepsy patients, as well as planning surgical procedures. In the future, LFP signals measured by implanted electrodes could detect an impending epilepsy seizure and stop it by injecting a suitable electrical current," Einevoll says.

"A similar technique is being used on many Parkinson's patients, who have had electrodes surgically implanted to prevent trembling," Researcher Klas Pettersen at UMB adds.

Einevoll and Pettersen also outline treatment of patients paralysed by spinal cord fracture as another potential area where the method can be used.

"When a patient is paralysed, nerve cells in the cerebral cortex continue to send out signals, but the signals do not reach the muscles, and the patient is thus unable to move arms or legs. By monitoring the right nerve cells and forwarding these signals to for example a robot arm, the patient may be able to steer by his or her thoughts alone," Einevoll says.

The Computational Neuroscience Group at UMB has already established contacts with clinical research groups in the USA and Europe for further research on using the approach in patient treatment.


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Contact: Professor Gaute Einevoll
gaute.einevoll@umb.no
47-951-24536
Norwegian University of Life Sciences
Source:Eurekalert  

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