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:1/12/2017)... PORTLAND, Oregon and PUNE, India , January 12, 2017 ... Technology Market: Opportunities and Forecasts, 2015 - 2022," projects that the global biometric technology ... CAGR of 19.4% from 2016 to 2022. Continue Reading ... ... ...
(Date:1/6/2017)... 2017  Delta ID Inc., a leader in consumer-grade ... automotive at CES® 2017. Delta ID has collaborated with ... the use of iris scanning as a secure, reliable ... in a car, and as a way to elevate ... Delta ID and Gentex will demonstrate (booth #7326 ...
(Date:12/22/2016)... 22, 2016 SuperCom (NASDAQ:   ... for the e-Government, Public Safety, HealthCare, and Finance sectors announced today ... been selected to implement and deploy a community-based supportive services program ... California , further expanding its presence in the state. ... This new program, which ...
Breaking Biology News(10 mins):
(Date:1/21/2017)... ... ... Nipro Corporation (Osaka, Japan) and Transonic Systems Inc. (New York, USA) announced ... and sales rights for all non-OEM Transonic products in Japan. As partners for more ... Nipro - Transonic JV is a natural next step to advance best practices and ...
(Date:1/21/2017)... Interpace Diagnostics Group, Inc. (NASDAQ: IDXG)("Interpace" ... useful molecular diagnostic tests and pathology services, today ... purchase agreement with three  institutional investors to purchase ... in a registered direct offering.  In a concurrent ... to the same investors warrants to purchase 855,000 ...
(Date:1/21/2017)... Aratana Therapeutics, Inc. (NASDAQ: PETX ... development and commercialization of innovative biopharmaceutical products for companion ... North America 2016. ... on the FDA approval of three innovative therapeutics in ... (capromorelin oral solution) and NOCITA ® (bupivacaine liposome ...
(Date:1/20/2017)... ... January 20, 2017 , ... The two newest companies to join the ... Vironika, a spin out from The Wistar Institute, and Sanguis, launched by a trio ... Market Street. , Vironika is developing a treatment for a chronic viral infection ...
Breaking Biology Technology: