Navigation Links
Star-Shaped Brain Cells Make Scans Possible
Date:6/19/2008

Astrocytes called missing link between neurons, blood vessels, researchers say

THURSDAY, June 19 (HealthDay News) -- Star-shaped brain cells called astrocytes play a key role in allowing experts to see the many reds, oranges, yellows and blues on brain scans, according to a report by researchers at the Massachusetts Institute of Technology.

Astrocytes, previously thought of as minor players in brain activity, receive signals directly from neurons and provide their own neuron-like responses to directly regulate blood flow. The colors seen on functional magnetic resonance imaging (fMRI) and positron emission tomography (PET), which provide neuroscientists with a map of the brain at work, represent blood flow and volume responding to neural activity.

"Why blood flow is linked to neuronal activity has been a mystery," study co-author Mriganka Sur, head of the department of brain and cognitive sciences at MIT, said in a prepared statement. "Previously, people have argued that the fMRI signal reports local field potentials or waves of incoming electrical activity, but neurons do not connect directly to blood vessels. A causal link between neuronal activity and blood flow has never been shown."

This finding, published in the June 20 issue of Science, shows astrocytes to be the missing link between neurons and blood vessels, he said.

Astrocytes are a common type of glia, one of the two main cell types in the brain. Neurons in the brain are outnumbered nine to one by glia. Astrocytes -- the most common type of glia -- extend their branching tendrils both around synapses -- through which neurons communicate -- and along blood vessels, the researchers said.

Contrary to previous thought, the new report finds that astrocytes influence complex neuronal computations such as the duration and selectivity of brain cell responses to stimuli. Since their chemical signals had rendered them invisible to
'/>"/>

Copyright©2008 ScoutNews,LLC.
All rights reserved

Page: 1 2

Related medicine news :

1. Neuroscientists show insulin receptor signaling regulates structure of brain circuits
2. Brain Activity May Predict Schizophrenia Behavior
3. Wavelets crunch through doctors day long struggle to diagnose brain tumors
4. Lou Gehrigs protein found throughout brain, suggesting effects beyond motor neurons
5. Complex changes in the brains vascular system occur after menopause
6. Gay Men, Straight Women Have Similar Brains
7. Developing unique brain maps to assist surgery and research
8. Estrogen therapy helps or hurts the brain depending on reproductive status
9. UPDATE: Defense Health Board Traumatic Brain Injury Family Caregivers Panel
10. Boosting Brain Protein Quickly Cut Excessive Drinking
11. New research shows how aging brain brings a healthy dose of perspective
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/12/2014)... July 12, 2014 Sean Francis, owner of the ... special challenges to his clients. He’s also known for his support ... found a way to combine the two and is excited to ... for the Boys and Girls Club. , The funds are the ... on June 23rd. Francis sent out emails and asked his clients ...
(Date:7/12/2014)... 12, 2014 Using and carrying around ... two inventors from Ashland, Va., decided that there needed ... inspired us to conceive of our design," he said. ... KIDNEY KOVER, which provides an inconspicuous way to use ... as well as promotes comfort and peace of mind. ...
(Date:7/12/2014)... With prom shopping reaching its final days, VogueQueen.com, a ... showcase its new and trendy apparels. Recently, the company ... its online shop. Additionally, it is now providing huge ... According to the company’s sales manager, the promotion will ... , He says, “Now, worldwide clients can order cheap ...
(Date:7/12/2014)... Wright & Schulte LLC has filed a ... subsidiary of Johnson & Johnson, on behalf of an Ohio ... a metal-on-metal DePuy Pinnacle hip replacement and had to undergo ... implant. The DePuy hip lawsuit was filed July 7, 2014, ... No. 3:14-cv-2427) where DePuy Pinnacle Hip lawsuit litigation is ...
(Date:7/12/2014)... 12, 2014 Doylestown Hospital recently conducted ... of men’s health questions. Paddock tackles topics including ... why women live longer than men, and testosterone replacement ... Made Simple featured on Doylestown Hospital’s website, Dr. ... at any age. If you notice pain, bulging, or ...
Breaking Medicine News(10 mins):Health News:Kawartha Lakes Fit Body Boot Camp’s Successful Fat Loss Challenge Results in $2,000 to Boys and Girls Club 2Health News:Kawartha Lakes Fit Body Boot Camp’s Successful Fat Loss Challenge Results in $2,000 to Boys and Girls Club 3Health News:VogueQueen.com Updates Its Summer Collection With New And Trendy Evening Dresses 2Health News:DePuy Pinnacle Hip Lawsuit Filed By Wright & Schulte LLC On Behalf of Ohio Man Who Required Revision Surgery Purportedly From Defective Hip Implant 2Health News:DePuy Pinnacle Hip Lawsuit Filed By Wright & Schulte LLC On Behalf of Ohio Man Who Required Revision Surgery Purportedly From Defective Hip Implant 3Health News:DePuy Pinnacle Hip Lawsuit Filed By Wright & Schulte LLC On Behalf of Ohio Man Who Required Revision Surgery Purportedly From Defective Hip Implant 4Health News:DePuy Pinnacle Hip Lawsuit Filed By Wright & Schulte LLC On Behalf of Ohio Man Who Required Revision Surgery Purportedly From Defective Hip Implant 5Health News:Ivyland Medical Center’s Dr. Brad Paddock Offers Tips for Men’s Health 2
... of scientists, led by H. Lundbeck A/S and King,s ... research academic-industry collaboration projects to find new methods for ... Novel Methods leading to New Medications in Depression ... top scientists from academic institutions with a wide range ...
... onPoint ... to announce that Joe Baffone, an 18-year oncology executive with Sanofi-Aventis has joined onPoint ... ... full service healthcare data solutions and reimbursement analytics firm, is proud to announce that ...
... , ... TBT Payment Acceptance Solutions offers merchant services across the southeast such as credit ... and loyalty cards. ,Whether you are a merchant in need of a payment ... with an established and trusted company, www.tbtpas.com allows for convenient access ...
... ... company CTW, Inc. of Mississippi and Massachusetts-based medical device manufacturer Tegra Medical to join ... ... private equity firm based in Boston, MA, is pleased to announce its majority investment ...
... , INDIANAPOLIS , Jan. ... solutions, has announced the completion of its $8 million ... Menlo Park, California .  The funding will allow Orbis ... and, in turn, help alleviate the nation,s wide-spread nursing shortages. ...
... , PORT-AU-PRINCE, Haiti , Jan. 19 , ... death toll likely well over 100,000 3 million people displaced or ... quake: 4 to 4.5 million) , Conditions in ... the quake are now scattered across 243 different locations in Port-au-Prince ...
Cached Medicine News:Health News:Largest academic-industry collaboration for drug discovery in depression and schizophrenia launched 2Health News:Largest academic-industry collaboration for drug discovery in depression and schizophrenia launched 3Health News:Oncology Industry Veteran, Joe Baffone, Joins onPoint Oncology, LLC. 2Health News:TBT Payment Acceptance Solutions Announces Launch of Redesigned “User-Friendly” Website, www.tbtpas.com 2Health News:Riverside Partners Announces Acquisition of CTW, Inc. and Partnership with Tegra Medical 2Health News:Riverside Partners Announces Acquisition of CTW, Inc. and Partnership with Tegra Medical 3Health News:Riverside Partners Announces Acquisition of CTW, Inc. and Partnership with Tegra Medical 4Health News:Orbis Education Secures $8.0 Million in Funding for Expanding Online Nursing Education Platform 2Health News:Orbis Education Secures $8.0 Million in Funding for Expanding Online Nursing Education Platform 3Health News:Orbis Education Secures $8.0 Million in Funding for Expanding Online Nursing Education Platform 4Health News:World Vision Situation Update: More Aid Reaching Many Survivors, but Conditions Remain Dire 2Health News:World Vision Situation Update: More Aid Reaching Many Survivors, but Conditions Remain Dire 3
(Date:7/11/2014)... July 11, 2014 Patient engagement has ... consequently, organizations are turning to an assortment of ... As part of this evolving approach to patient ... communicate and engage patients throughout their experiences with ... empowerment. By mapping the patient journey and employing ...
(Date:7/11/2014)... July 11, 2014 According ... by Composition of Material, Application (Healthcare, Homeland security, ... Product (Personal Instrument, Hand-Held Instruments, Fixed, and Installed ... to 2013 - 2020", published by MarketsandMarkets, the Scintillator Market ... 5.62% from 2014 to 2020, and reach $479.16 ...
(Date:7/11/2014)... -- On Thursday, July 10, 2014, ... Jones Industrial Average finished the day 0.42% lower at 16,915.07, ... losses were broad based as eight out of ten sectors ... Sector Index ended the day at 711.88, down 0.02%, while ... Investor-Edge has initiated coverage on the following equities: Covidien PLC ...
Breaking Medicine Technology:New Study Uses Six-Step Patient Journey as Framework for Consumer-Focused Marketing Opportunities 2Scintillator Market will be worth $479.16 Million by 2020 2Scintillator Market will be worth $479.16 Million by 2020 3Scintillator Market will be worth $479.16 Million by 2020 4Health Care Equipment Equities Movers and Shakers -- Research on Covidien, Baxter, DexCom, and Boston Scientific 2Health Care Equipment Equities Movers and Shakers -- Research on Covidien, Baxter, DexCom, and Boston Scientific 3Health Care Equipment Equities Movers and Shakers -- Research on Covidien, Baxter, DexCom, and Boston Scientific 4
... Inc. today announced that data from a Phase 1/2 study, ... Proceedings of the National Academy of Sciences, demonstrate the ... action human growth hormone, compared to therapy with native hormone. ... treated with ARX201, which was generated with Ambrx,s ReCODE™ technology. ...
... Korea, May 25, 2011 New findings presented from ... program showed that the safety profile of STELARA and ... time in adults with moderate to severe plaque psoriasis ... reported findings from an analysis of four placebo-controlled Phase ...
Cached Medicine Technology:Proceedings of the National Academy of Sciences Report Superiority of Human Growth Hormone Generated with Ambrx Technology 2New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 2New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 3New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 4New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 5New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 6New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 7New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 8New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 9New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 10New Four Year STELARA® Data Show Consistent Safety Profile Over Time in Patients With Moderate to Severe Plaque Psoriasis 11
... ARUP Laboratories is a national reference ... laboratory research and development. ARUP offers an ... unique medical tests in clinical and anatomic ... ARUP Laboratories' clients include more than half ...
... is a national reference laboratory and a ... development. ARUP offers an extensive test menu ... in clinical and anatomic pathology. Owned by ... include more than half of the nation's ...
... national reference laboratory and a worldwide leader ... offers an extensive test menu of highly ... and anatomic pathology. Owned by the University ... than half of the nation's university teaching ...
... reference laboratory and a worldwide leader in ... an extensive test menu of highly complex ... anatomic pathology. Owned by the University of ... half of the nation's university teaching hospitals ...
Medicine Products: