Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Brain Injuries Tied to Trouble Sleeping

25.05.2010
People with brain injuries may produce low amounts of melatonin, which affects their sleep, according to a study published in the May 25, 2010, print issue of Neurology®, the medical journal of the American Academy of Neurology.

For the study, 23 people who had a severe traumatic brain injury an average of 14 months earlier and 23 healthy people of the same age spent two nights in a sleep laboratory.

“We’ve known that people often have problems with sleep after a brain injury, but we haven’t known much about the exact causes of these problems,” said study author Shantha Rajaratnam, PhD, of Monash University in Victoria, Australia.

The healthy people produced more melatonin than the people with brain injuries in the evening hours, when melatonin levels are supposed to rise to signal sleep. Melatonin is a hormone that regulates biological rhythms, including sleep.

“These results suggest that the brain injury may disrupt the brain structures that regulate sleep, including the production of melatonin,” Rajaratnam said. “Future studies should examine whether taking supplemental melatonin can improve sleep in people with brain injuries.”

The people with brain injuries had other differences in their sleep patterns. They spent less of their time in bed actually asleep than the healthy participants did, or a “sleep efficiency” percentage of 82 compared to 90 for the healthy group. They also spent more time awake after initially falling asleep, or an average of 62 minutes per night compared to 27 minutes for the healthy group.

In addition, the people with brain injuries spent more time in non-REM sleep, in a stage of sleep called slow-wake sleep or deep sleep. Those with brain injuries spent an average of 24 percent of their time in slow-wake sleep, compared to 20 percent of the time for healthy participants.

Those with brain injuries also had more symptoms of anxiety and depression. However, the researchers calculated the results to control for the anxiety and depression symptoms and still found differences in sleep patterns.

The study was supported by the Australian National Health and Medical Research Council.

The American Academy of Neurology, an association of more than 22,000 neurologists and neuroscience professionals, is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as multiple sclerosis, restless legs syndrome, Alzheimer’s disease, narcolepsy and stroke.

For more information about the American Academy of Neurology, visit http://www.aan.com

Rachel L. Seroka | American Academy of Neurology
Further information:
http://www.aan.com

More articles from Studies and Analyses:

nachricht A sudden drop in outdoor temperature increases the risk of respiratory infections
11.01.2017 | University of Gothenburg

nachricht Urbanization to convert 300,000 km2 of prime croplands
27.12.2016 | Mercator Research Institute on Global Commons and Climate Change (MCC) gGmbH

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: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>