Navigation Links
Stanford-led team validates, extends fMRI research on brain activity
Date:5/16/2010

STANFORD, Calif. Like a motorist who knows that the "check engine" light indicates something important but ill-defined is happening, neuroscientists have relied heavily on an incompletely understood technology called functional magnetic resonance imaging to show them what the brain is doing when people respond to different stimuli. The non-invasive technology offers a window into the physiology of human cognition and emotion, but without a satisfying explanation of how some common fMRI signals are produced the ability of researchers to draw conclusions has been limited.

Now a Stanford University-led team has solved the mystery, and in doing so has discovered a new way to make fMRI signals based on increased blood flow even more useful. Combined with optogenetics (a technology developed at Stanford that employs genes from microbes to allow neurons to be controlled with pulses of light), blood-flow fMRI can now be used to study the brain-wide impact of changes in neural circuitry, such as ones that may underlie many neurological and psychiatric diseases.

The team's research will appear May 16 in the online version of Nature.

A 'BOLD' finding

The study is the first to prove what neurologists could only hope was true: that fMRI signals based on elevated levels of oxygenated blood in specific parts of the brain are caused by an increase in the excitation of specific kinds of brain cells. For example, in the past researchers could only assume that when they showed subjects a picture of someone they knew, stronger fMRI signal in a part of the brain that possibly deals with face recognition was caused by the excitation of neurons, rather than some other factor.

These signal increases are measured using the blood oxygenation level-dependent, or BOLD, technique.

Because researchers have published more than 250,000 papers using or building upon the BOLD technique, clarifying its true meaning is very im
'/>"/>

Contact: David Orenstein
davidjo@stanford.edu
650-736-2245
Stanford University Medical Center
Source:Eurekalert

Page: 1 2 3

Related medicine news :

1. SEO-Peace.com Extends The March Special SEO Special Offers And Revise Many Services
2. Diversinet Extends Reach of Mobile Healthcare Information With New Product Release Targeting Healthcare Organizations
3. Global Medical Staffing Extends Locum Tenens Physician Placement to the Middle East
4. Kardea Nutrition Adds V.P. Sales, Extends Distribution Network
5. McLaren Software Extends the Reach of Asset Document Management Processes
6. Swisslog Extends Materials Transport Product Family for Hospitals by Entering Autonomous Mobile Robot Market with SpeciMinder and RoboCourier
7. ALFA Extends Helping Hand to Haiti
8. Vaccine approach extends life of metastatic prostate cancer patients
9. SecureWorks Extends PCI Approved Scanning Vendor Solutions
10. Angelica Extends Helping Hand to Haitian Hospital
11. Service Corporation International Extends Offer for Keystone North America Inc.
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... Europe Well Intervention Market report defines and segments the well ... The well intervention services market in Europe is estimated to ... by 2018, at a CAGR of 7% from 2013 to ... Intervention Market report, to get an idea of the in-depth ... in the Europe well intervention market, and is supported by ...
(Date:7/11/2014)... News) -- In people with sex addiction, pornography affects ... seen in drug addicts as they consume drugs, a ... brain activity between patients who have compulsive sexual behavior ... addicts," study author Dr. Valerie Voon, of the University ... release. Voon,s research involved 19 men with sex ...
(Date:7/11/2014)... The report “Probiotics Market by Products (Functional ... (Regular, Therapeutic, Preventive Health Care) & Ingredients (Lactobacilli, ... 2019 ” defines and segments the global probiotics ... market value of probiotic products and ingredients. The ... for the global market with an analysis of ...
(Date:7/11/2014)... 2014 Biostimulants are widely applied in ... and ornamentals. These also help turf and ornamentals in ... roots. Turf, ornamentals, and flowers appear healthy and strong ... has increased from the last few years. The most ... is Europe, with around 40% share in 2013, and ...
(Date:7/11/2014)... 2014) Obese and overweight firefighters are not ... providers, according to new research from The University ... , National guidelines state that health care professionals ... maintaining a healthy weight. Firefighters have high rates ... cause of line-of-duty deaths in firefighters. This study ...
Breaking Medicine News(10 mins):Health News:Europe Well Intervention Services Market is Expected to Reach $3.4 Billion by 2018 - New Report by MicroMarket Monitor 2Health News:Europe Well Intervention Services Market is Expected to Reach $3.4 Billion by 2018 - New Report by MicroMarket Monitor 3Health News:Brains of Sex Addicts May Be Wired Like Those of Drug Addicts, Study Finds 2Health News:Probiotic Ingredient Market worth $1,732.8 Million by 2019 - A Report by MarketsandMarkets 2Health News:Probiotic Ingredient Market worth $1,732.8 Million by 2019 - A Report by MarketsandMarkets 3Health News:Probiotic Ingredient Market worth $1,732.8 Million by 2019 - A Report by MarketsandMarkets 4Health News:Probiotic Ingredient Market worth $1,732.8 Million by 2019 - A Report by MarketsandMarkets 5Health News:Biostimulants Market in Turf and Ornamentals is Expected to Reach $ 3.8 Billion by 2018 - New Report by MicroMarket Monitor 2Health News:Biostimulants Market in Turf and Ornamentals is Expected to Reach $ 3.8 Billion by 2018 - New Report by MicroMarket Monitor 3
... innovative approach to treating neonatal feeding problems at Nationwide ... feed orally to be discharged earlier and without feeding ... According to American Academy of Pediatrics guidelines, in ... hospital, they must establish safe oral feeding methods. The ...
... This press release is available in German . ... the biggest risk factors for the development of gastric cancer, the ... biologists from the University of Zurich have now identified a mechanism ... gastric mucosa and sets them up for malignant transformation. Gastric ...
... -- Doctors have been prescribing codeine for postpartum pain management ... to breastfeed while taking the opioid. But the death ... many health care providers questioning the safety of the drug ... risks, some doctors have begun the practice of prescribing oxycodone ...
... HealthDay Reporter , MONDAY, Sept. 5 (HealthDay News) -- Living ... as much as 80 percent, researchers from the U.S. National ... diet, exercise, smoking and drinking have an impact on whether ... each individual factor affects the risk had been unclear. ...
... 6 (HealthDay News) -- There,s no link between menopause ... a study that challenges a long-held medical belief that ... menopause. Aging alone, not the hormonal impact of ... women, according to the Johns Hopkins researchers. The ...
... Sept. 6 (HealthDay News) -- Some children, especially those ... the hospital, a new study finds. Acetaminophen, albuterol ... hospitalized children, the researchers said. They also found an ... of drugs given to children. On the first ...
Cached Medicine News:Health News:Neonatal and infant feeding disorders program saves infants from lifetime of feeding tubes 2Health News:Stomach bacterium damages human DNA 2Health News:Mother's postpartum oxycodone use: No safer for breastfed infants than codeine 2Health News:Healthy Living Can Cut Chances of Developing Diabetes 2Health News:Aging, Not Menopause, Raises Women's Heart Risks, Study Finds 2Health News:Hospitalized Kids May Receive Up to 35 Meds a Week 2
(Date:7/11/2014)... 11, 2014 On Thursday, ... 0.52%, the Dow Jones Industrial Average finished the day 0.42% ... down 0.41%. The losses were broad based as eight out ... 500 Health Care Sector Index ended the day at 711.88, ... last one month. Investor-Edge has initiated coverage on the following ...
(Date:7/11/2014)... 11, 2014 Research and Markets ( ... "Immunoprotein Diagnostic Testing Market - Forecasts to ... of 6% and is expected to be valued ... offering. http://photos.prnewswire.com/prnh/20130307/600769 ... has been segmented according to immunoprotein types which ...
(Date:7/11/2014)... , July 11, 2014 ... visitors to Safety & Health Expo 2014 ... the move to London ... management attending exhibition.     ... http://photos.prnewswire.com/prnh/20140711/696892-a )      ...
Breaking Medicine Technology:Health 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 4Immunoprotein Diagnostic Testing Market - Forecasts to 2019: Expected to grow at the highest CAGR of 6% and is expected to be valued at USD 4,943.0 million 2UK's Flagship Health & Safety Event Has Successful Inaugural Year in London 2UK's Flagship Health & Safety Event Has Successful Inaugural Year in London 3UK's Flagship Health & Safety Event Has Successful Inaugural Year in London 4
... Beta 200 ophthalmoscope, ... glare-free direct ophthalmoscope. Heine's ... patent #4,963,014) along with ... construction, make the Beta ...
... optics. The separation of illumination and observation ... system avoids corneal and iris reflex (Gullstrand-principle). ... the whole of the illuminated section of ... Conventional ophthalmoscopes often let you see only ...
... Beta 200S is the first ... combination of patented aspherical optics ... range of corrective lenses from ... single diopter steps. A perfectly-focused ...
With the unique automatic focus system, Autofoc 2 remains the instrument of choice for direct ophthalmoscopy. Includes XHL halogen bulb....
Medicine Products: