Navigation Links
Mesh-like network of arteries adjusts to restore blood flow to stroke-injured brain
Date:1/30/2009

surface of the brain have a mesh-like architecture," Kleinfeld said. "One consequence of that is that it operates like a grid system that redistributes "current flow as you need it."

"City traffic freezes a lot less than you would think because once a street gets bogged down, you can move over to another street," he said. "This seems to be what happens on the surface of the brain."

Flows through the surface vessels reversed and stalled, as previously observed, but those changes helped to redistribute blood to ensure a steady supply though vessels that penetrate into the brain.

Shih focused his measurements on small arteries, called arterioles, at the point where they dive into the brain to supply a discrete patch of the cortex, a juncture that is vulnerable to occlusions that can cause microstrokes this group's previous work has found.

"These are extremely important. A single penetrating arteriole will feed a column of tissue," Shih said. "These are bottlenecks in flow."

The penetrating vessels neither reversed nor stalled, even though many connected to loops and bridges in the vascular network that could have allowed that to happen. Even when the pressure dropped permanently as a result of stroke damage, wider lanes allowed the network to deliver red blood cells at the same rate.

"Diameter is the major determinant to how blood actually flows through vessels. Open up a blood vessel a little bit and you'll have a huge change in the amount of blood that goes through," Shih said. "Blood flow comes back, and it seems that these vessels are very resistant to the stroke. They function quite normally."


'/>"/>

Contact: Susan Brown
sdbrown@ucsd.edu
858-246-0161
University of California - San Diego
Source:Eurekalert  

Page: 1 2

Related medicine news :

1. New Report Teaches The Art Of Communicating With People Using Social Networks For Health & Wellness
2. Pitt receives $11 million from NIH to coordinate hepatitis B clinical research network
3. RediClinic Locations in Austin Added as Blue Cross and Blue Shield of Texas Network Providers
4. Cystinosis Research Network Unveils New Communication Strategy and Website
5. Weizmann Institute scientists create working artificial nerve networks
6. Emerson Network Power Introduces High Density AC-DC Adapters for Medical Applications
7. Grassroots Group Gets Travel Advantage Network Support
8. Emageon Signs Agreement with Integrated Health Network MultiCare
9. AVG Anti-Virus and Walling Data Streamline Network Security for National Medical Supply Company
10. Genworth Forges Strategic Relationship with National LTC Network
11. Annual SNM MI summit introduces the clinical trials network
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Mesh-like network of arteries adjusts to restore blood flow to stroke-injured brain
(Date:8/22/2014)... CA (PRWEB) August 22, 2014 Buying a ... an adult who is unsure about available coverage types by ... providing principal life insurance policy pricing to the public using ... use of this tool is free and is expected to ... available to the public throughout the U.S. The system is ...
(Date:8/22/2014)... The regional economy is about to ... on the grow again. The plant will invest ... to boost production of the popular Highlander midsize sport ... investment to $4 billion. This step allows Toyota to ... flexibility to adjust its product mix to meet changing ...
(Date:8/22/2014)... 2014 As the controversy surrounding ... in uterine surgeries continues to grow, Bernstein Liebhard ... decided to limit coverage of uterine morcellation. According ... Cross-Blue Shield of Massachusetts will no longer cover ... as of September 1, 2014. Other insurers in ...
(Date:8/22/2014)... Bcl-2-like protein 11 (BIM) deletion in advanced non-small ... progression free survival (PFS) in epidermal growth factor ... treated Asian patients. Also, BIM deletion independently predicts ... The BIM protein can activate the programmed cell ... cells. BIM deletion has been detected in 12.8% ...
(Date:8/22/2014)... Vegas, NV (PRWEB) August 22, 2014 ... by Dr. Sen and Dr. Samantha Pearson to help ... contacts, and avoid corrective vision surgery by instead improving ... Michaels, prompting an investigative review. , “There’s a ... of dollars in revenue each year—it’s because people just ...
Breaking Medicine News(10 mins):Health News:Principal Life Insurance Policies Now Quoted for Adults at Insurance Website Online 2Health News:Toyota Indiana Adding 300 Jobs to Build More Highlanders 2Health News:As Power Morcellator Controversy Grows, Bernstein Liebhard LLP Comments on Massachusetts Insurers’ Plans to Limit Coverage of Uterine Morcellation 2Health News:As Power Morcellator Controversy Grows, Bernstein Liebhard LLP Comments on Massachusetts Insurers’ Plans to Limit Coverage of Uterine Morcellation 3Health News:As Power Morcellator Controversy Grows, Bernstein Liebhard LLP Comments on Massachusetts Insurers’ Plans to Limit Coverage of Uterine Morcellation 4Health News:Deletion predicts survival in advanced non-small cell lung cancer 2Health News:Restore My Vision Today: Review Exposes Natural Eye Restoration Guide by Dr. Sen and Dr. Samantha Pearson 2
... a London based leading drug company, GlaxoSmithKline for having ... the U.S. Food and Drug Administration two years ago ... This became evident last November when The FDA identified ... ,The Public Citizen Group has registered a case ...
... It is always a good idea to regularly floss your ... whole process is cumbersome and a larger percentage of the ... in between the teeth and this leads to gum problems ... ,New research presented today at the American Dental Association's (ADA) ...
... diet and health is well recognized, however, it is ... particular dietary component and a specific health endpoint. This ... as most of them reach humans through the food ... determined the occurrence of various chemical contaminants of notable ...
... is important to exhibit feelings of sympathy or empathy for ... what happens in our brain as soon as // we ... show that the actions of the observer to a large ... that we understand the actions of another person, apparently, on ...
... in the October issue of the journal Pediatrics says that ... that of Cow's milk. , ,Dr. Ruth A. Lawrence ... her colleague Dr. William H. Bowen used rats to demonstrate ... faster than cow's milk. Baby mice did develop cavities and ...
... and extension of lifetime of men with prostate cancer. ... help the immune system recognize tumors. // “If these ... principle of a dendritic cell vaccine altering the natural ... of solid tumor oncology at the Dana-Farber Cancer Institute ...
Cached Medicine News:Health News:FDA Mislead On Asthma Drug By GlaxoSmithKline 2Health News:Athletes Are More Prone To Environmental Pollutants Due To Choice Of Diet 2Health News:Feelings Of Sympathy And Empathy Dictated by Personal Experience 2Health News:Feelings Of Sympathy And Empathy Dictated by Personal Experience 3
(Date:8/22/2014)... August 22, 2014 ... ) has announced the addition of the  ... to their offering.       (Logo: ... essential instrument for any modern science laboratory ... of materials. It can be broadly classified ...
(Date:8/22/2014)... FLINT, Mich. , Aug. 22, 2014 /PRNewswire/ ... been selected as one of two winners in ... by Specialty Pharmacy Solutions, LLC. The results of ... issue of Specialty Pharmacy News. ... their Diplomat University Education & Training program. Through ...
(Date:8/22/2014)... -- Research and Markets  has announced the addition ... & Technologies" report to their offering. ... or you wish to expand your product line, you,ll ... The authors know you want to make effective product ... generate improved revenues and take market share from your ...
Breaking Medicine Technology:Global Laboratory Electronic Balance Market 2014-2018: Key Vendors are A&D Company, Mettler-Toledo, Sartorius and Thermo Fisher 2Diplomat honored as a Top Innovator by Specialty Pharmacy News 2Global Stem Cell Research Products: Opportunities, Tools & Technologies - 2014 Report 2Global Stem Cell Research Products: Opportunities, Tools & Technologies - 2014 Report 3
An enzyme linked immunosorbent assay (ELISA) for the detection and quantitationof RF IgG isotype in human serum of patients with rheumatoid arthritis....
An enzyme linked immunosorbant assay (ELISA) for the detection and quantitation of Rheumatoid Factor (RF) of IgM isotype in human serum....
An enzyme linked immunoassay (ELISA) for the detection and semiquantitationof IgG and IgM antibodies to 2-GP1, as an aid in assessingthe risk of thrombosis in patients with Systemic Lupus Erythematos...
An enzyme linked immunoassay (ELISA) for the detection and semiquantitation of IgG, IgA or IgM anticardiolipin antibodies, as an aid in assessing the risk of thrombosis in individuals with Systemic L...
Medicine Products: