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)... 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:4/15/2016)...  A new partnership announced today will help ... in a fraction of the time it takes ... life insurance policies to consumers without requiring inconvenient ... Diagnostics, rapid testing (A1C, Cotinine and HIV) and ... weight, pulse, BMI, and activity data) available at ...
(Date:3/31/2016)... , March 31, 2016   ... ("LegacyXChange" or the "Company") LegacyXChange is excited ... of its soon to be launched online site for ... https://www.youtube.com/channel/UCyTLBzmZogV1y2D6bDkBX5g ) will also provide potential shareholders a ... DNA technology to an industry that is notorious for ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June 23, 2016  The Prostate Cancer Foundation (PCF) is ... treatments and faster cures for prostate cancer. Members of the Class of 2016 ... countries. Read More About the Class of 2016 PCF ... ... ...
(Date:6/23/2016)... ... June 23, 2016 , ... STACS DNA Inc., the sample tracking software ... State Crime Laboratory, has joined STACS DNA as a Field Application Specialist. , ... Tremblay, President and COO of STACS DNA. “In further expanding our capacity as a ...
(Date:6/23/2016)... June 23, 2016 ... 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 Published recently ... peer-reviewed journal from touchONCOLOGY, Andrew D Zelenetz ... of cancer care is placing an increasing burden ... expensive biologic therapies. With the patents on many ...
(Date:6/23/2016)... , ... June 23, 2016 , ... ... new line of intelligent tools designed, tuned and optimized exclusively for Okuma CNC ... in Chicago. The result of a collaboration among several companies with expertise in ...
Breaking Biology Technology: