Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Rapid Eye Movement (REM) Study Shows Brain Functions Same Way Awake Or Asleep

30.10.2008
Johns Hopkins researchers have found strong evidence supporting the view that the sleeping mind functions the same as the waking mind — a discovery that could significantly alter basic understanding of the normal and abnormal brain.

The evidence comes from a study, to appear online this month in the journal Human Brain Mapping, of 11 healthy male and female participants whose rapid eye movements (REM) in “dream” sleep were timed using a video camera. The REM tracking was accompanied by special MRI images designed to visualize brain activity.

Results revealed activity in areas of the brain that control sight, hearing, smell, touch, balance and body movements.

“This is the first time we have been able to detect brain activity associated with REM in areas that control senses other than sight,” says lead researcher Charles Hong, M.D., Ph.D., assistant professor in the Department of Psychiatry and Behavioral Sciences at Johns Hopkins University School of Medicine. “After comparing our data to other studies on awake people, we learned that our findings lend great support to the view that the waking brain functions in a similar way.”

Hong says this method may allow simultaneous examination of major brain systems that are activated when REMs occur and are reported to be abnormal in some psychiatric diseases.

In addition, Hong says, their method may be useful in people with Alzheimer’s disease or schizophrenia and even infants. In awake studies, it’s required that subjects follow instructions and perform tasks to stimulate brain activity — tasks that these groups might have difficulty completing.

Their method may also be useful in people with movement disorders like Parkinson’s disease.

“Head movements can create false data in MRI studies,” says Hong, “while conveniently, REM sleep greatly reduces muscle tone, thus head movements.”

Finally, Hong says that in order to obtain reliable results from awake participants it would require studying multiple subjects.

“In contrast, only six minutes of MRI data from a single participant in our REM study produced robust results,” says Hong.

He added that the ability to draw results from a single person permits researchers to compare results with other data that is specific to an individual.

“We can also analyze changes over time within a single person with a psychiatric disease. Our method may make a powerful tool to study the development of the brain starting from birth,” he says.

Other researchers from Johns Hopkins University School of Medicine include James C. Harris, Godfrey D. Pearlson, Jin-Suh Kim and Vince D. Calhoun of the Department of Psychiatry and Behavioral Sciences; Xavier Golay, Joseph S. Gillen, Peter C. M. van Zijl and James J. Pekar of the Department of Radiology and F. M. Kirby of the Research Center for Functional Brain Imaging, Kennedy Krieger Institute; Daniel J. Simmonds of the Department of Developmental Cognitive Neurology and David S. Zee of the Department of Neurology. James H. Fallon of the Department of Anatomy and Neurobiology, University of California, Irvine also contributed to this study.

Eric Vohr | Newswise Science News
Further information:
http://www.jhmi.edu

More articles from Studies and Analyses:

nachricht Rutgers-led innovation could spur faster, cheaper, nano-based manufacturing
14.02.2018 | Rutgers University

nachricht New study from the University of Halle: How climate change alters plant growth
12.01.2018 | Martin-Luther-Universität Halle-Wittenberg

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

Im Focus: Hybrid optics bring color imaging using ultrathin metalenses into focus

For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.

But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...

Im Focus: Stem cell divisions in the adult brain seen for the first time

Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.

The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...

Im Focus: Interference as a new method for cooling quantum devices

Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters

Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Researchers invent tiny, light-powered wires to modulate brain's electrical signals

21.02.2018 | Life Sciences

The “Holy Grail” of peptide chemistry: Making peptide active agents available orally

21.02.2018 | Life Sciences

Atomic structure of ultrasound material not what anyone expected

21.02.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>