Navigation Links
Multiple thought channels may help brain avoid traffic jams
Date:5/6/2012

Brain networks may avoid traffic jams at their busiest intersections by communicating on different frequencies, researchers at Washington University School of Medicine in St. Louis, the University Medical Center at Hamburg-Eppendorf and the University of Tbingen have learned.

"Many neurological and psychiatric conditions are likely to involve problems with signaling in brain networks," says co-author Maurizio Corbetta, MD, the Norman J. Stupp Professor of Neurology at Washington University. "Examining the temporal structure of brain activity from this perspective may be especially helpful in understanding psychiatric conditions like depression and schizophrenia, where structural markers are scarce."

The research will be published May 6 in Nature Neuroscience.

Scientists usually study brain networks areas of the brain that regularly work together using magnetic resonance imaging, which tracks blood flow. They assume that an increase in blood flow to part of the brain indicates increased activity in the brain cells of that region.

"Magnetic resonance imaging is a useful tool, but it does have limitations," Corbetta says. "It only allows us to track brain cell activity indirectly, and it is unable to track activity that occurs at frequencies greater than 0.1 hertz, or once every 10 seconds. We know that some signals in the brain can cycle as high as 500 hertz, or 500 times per second."

For the new study, conducted at the University Medical Center at Hamburg-Eppendorf, the researchers used a technique called magnetoencephalography (MEG) to analyze brain activity in 43 healthy volunteers. MEG detects very small changes in magnetic fields in the brain that are caused by many cells being active at once. It can detect these signals at rates up to 100 hertz.

"We found that different brain networks ticked at different frequencies, like clocks ticking at different speeds," says lead author Joerg Hipp, PhD, of the University Medical Center at Hamburg-Eppendorf and the University of Tbingen, both in Germany.

For example, networks that included the hippocampus, a brain area critical for memory formation, tended to be active at frequencies around 5 hertz. Networks constituting areas involved in the senses and movement were active between 32 hertz and 45 hertz. Many other brain networks were active at frequencies between eight and 32 hertz. These "time-dependent" networks resemble different airline route maps, overlapping but each ticking at a different rate.

"There have been a number of fMRI studies of depression and schizophrenia showing 'spatial' changes in the organization of brain networks," Corbettta says. "MEG studies provide a window into a much richer 'temporal' structure. In the future, this might offer new diagnostic tests or ways to monitor the efficacy of interventions in these debilitating mental conditions."


'/>"/>

Contact: Diane Duke Williams
williamsdia@wustl.edu
314-286-0111
Washington University School of Medicine
Source:Eurekalert

Related medicine news :

1. Low-dose whole-body CT finds disease missed on standard imaging for patients with multiple myeloma
2. Kessler Foundation scientist awarded $554,000 for multiple sclerosis employment research
3. Fish Oil Supplements Wont Help in Multiple Sclerosis: Study
4. Experimental Pill for Multiple Sclerosis Shows Promise
5. Scientists uncover multiple faces of deadly breast cancer
6. Study shows colorectal cancer screening rates high in patients with multiple health problems
7. Experimental Pill May Ease Multiple Sclerosis Disability
8. HIV/AIDS vaccine shows long-term protection against multiple exposures in non-human primates
9. Hyperactivity in brain may explain multiple symptoms of depression
10. Young children exposed to anesthesia multiple times show elevated rates of ADHD
11. A single therapy slows multiple cancers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... , ... Pixel Film Studios Released ProSlice Levels, a Media Slicing Effect ... a whole new perspective by using the title layers in ProSlice Levels to ... ProSlice Levels contains over 30 Different presets to choose from. FCPX users ...
(Date:6/26/2016)... (PRWEB) , ... June 26, 2016 , ... ... fertility once they have been diagnosed with endometriosis. These women need a treatment ... also require a comprehensive approach that can help for preservation of fertility and ...
(Date:6/25/2016)... ... ... The temporary closing of Bruton Memorial Library on June 21 due to a possible lice ... overlooked aspect of head lice: the parasite’s ability to live away from a human host, ... a necessary one in the event that lice have simply gotten out of control. , ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... As a ... Magna Cum Laude and his M.D from the David Geffen School of Medicine at ... returned to Los Angeles to complete his fellowship in hematology/oncology at the UCLA-Olive View-Cedars ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the benefits of moderation, ... the latter, setting the bar too high can result in disappointment, perhaps even self-loathing. ... toward their goal. , Research from PsychTests.com reveals that behind the ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 2016 According to a new ... Pen Needles, Safety Pen Needles), Needle Length (4mm, 5mm, ... Mode of Purchase (Retail, Non-Retail) - Trends & Global ... the market for the forecast period of 2016 to ... Billion by 2021 from USD 1.65 Billion in 2016, ...
(Date:6/24/2016)... Belgium , June 24, 2016 ... the appointment of Dr. Edward Futcher ... Non-Executive Director, effective June 23, 2016.Dr. Futcher was ... Nominations and Governance Committees.  As a non-executive member ... independent expertise and strategic counsel to VolitionRx in ...
(Date:6/23/2016)... 23, 2016  MedSource announced today that it ... software solution of choice.  This latest decision demonstrates ... to their clients by offering a state-of-the-art electronic ... establishes nowEDC as the EDC platform of choice ... clients.  "nowEDC has long been a preferred EDC ...
Breaking Medicine Technology: