Navigation Links
Tracking stroke
Date:4/17/2008

This release is available in German.

Every two minutes in Germany, one person suffers a stroke. About one third of the affected do not survive the sudden lack of blood in the brain, many others are left with serious disabilities. Since the brain is a high-performance organ with an immense energy requirement if the supply of oxygen is interrupted, it reacts with paralyses, impaired speech and vision. To improve the understanding of the underlying processes in the brain, researchers from the Physikalisch-Technische Bundesanstalt (PTB) are working on experiments in neurovascular coupling: They are researching the temporal correlation between the oxygen requirement of the nerve cells and the oxygen supply through the blood. They have succeeded here for the first time in vivo with a temporal resolution of 100 ms.

To achieve this the neuronal activity (brain current) was measured simultaneously with the accompanying vascular signal changes (blood volume and oxygenation) during sequences of finger movement. This combined study is only possible within the magnetically shielded room at PTB (BMSR-2) as this room offers a unique environment for DC-magnetoencephalography, which is a measure of neuronal activity. The concentration changes of oxygenated and deoxygenated hemoglobin are assessed optically using another advanced technique, time resolved near infrared spectroscopy, which is compatible with DC- magnetoencephalography.

The results show clearly, that the instantaneous change in neuronal activity is followed by a slower change on the scale of seconds in the blood supply. This temporal relation might be altered in stroke patients with possible new diagnostical insights. The quantitative characterization of neuro-vascular coupling has another important application: Functional magnetic resonance imaging (fMRI) relies on vascular changes, whereas electro- and magnetoencephalography (EEG, MEG) are direct measures of neuronal activity. The experiments introduced here are designed to be able to relate one type of measurement to the other.


'/>"/>

Contact: Dr. Tilmann Sander-Thmmes
Tilmann.Sander-Thoemmes@ptb.de
49-033-481-7436
Physikalisch-Technische Bundesanstalt (PTB)
Source:Eurekalert

Related biology news :

1. Tracking feline memories on the move
2. Louisiana Tech researchers investigate tracking, sensors to assist Air Force
3. NIH recognizes Clemson nanotechnology for molecule tracking
4. GestureTek/Imagination Launch AirPoint, Worlds First Hand-Tracking Unit, for Shell Group.
5. Blood pressure drug telmisartan shows powerful activity against stroke
6. Stroke victims may benefit from stem cell transplants
7. Blueberry and green tea containing supplement protects against stroke damage
8. Scientists ask whether microscaffolding can help stem cells rebuild brain after stroke damage
9. Can micro-scaffolding help stem cells rebuild the brain after stroke?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2016)... SAN FRANCISCO and BANGALORE, India ... part of EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... service provider, today announced a global partnership that ... convenient way to use mobile banking and payment services. ... Mobility is a key innovation area for financial services, but ...
(Date:4/28/2016)... First quarter 2016:   , ... the first quarter of 2015 The gross margin was ... 18.8) and the operating margin was 40% (-13) Earnings ... flow from operations was SEK 249.9 M (21.2) , ... SEK 7,000-8,500 M. The operating margin for 2016 is ...
(Date:4/26/2016)... BANGALORE, India and LONDON ... Infosys Finacle, part of EdgeVerve Systems, a ... ), and Onegini today announced a partnership to ... banking solutions.      (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ... banks to provide their customers enhanced security to ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... , ... April 29, 2016 , ... ... personalized pain medicine, is excited to announce the launch of the Proove ... health studies, volunteerism, and education to promote the use of personalized medicine for ...
(Date:4/29/2016)... Marietta, GA (PRWEB) , ... April 29, 2016 ... ... marketer of medical devices used in spinal surgical procedures, today announced the completion ... an enhanced value proposition for current and future customers and partners. Kohlberg ...
(Date:4/29/2016)... New York , April 29, 2016 /PRNewswire/ ... report published by Transparency Market Research "Separation Systems ... Size, Share, Growth, Trends, and Forecast 2015 - ... was valued at US$ 10,665.5 Mn in 2014 ... of 6.8% from 2015 to 2023 to reach ...
(Date:4/29/2016)... ... April 29, 2016 , ... During ... transform technology into a viable company, CereScan’s CEO, John Kelley, joined other Denver ... recognized leader and mentor in the Denver area business community, shared his top ...
Breaking Biology Technology: