Subscribe to our free daily newsletters
. Earth Science News .




Subscribe to our free daily newsletters



DISASTER MANAGEMENT
Witnesses to trauma can develop irrational fears
by Brooks Hays
Washington (UPI) May 25, 2017


The human brain learns not only through direct experience, but also by observing. Witnesses to others' pain can learn to be weary or fearful of the cause of distress.

But such learning experience can also fuel irrational or debilitating fears. New research suggests the brain's endogenous opioid system can help people learn the proper lessons. The system, however, doesn't always work.

"Some people are over-sensitive to this form of social learning," Jan Haaker, an associated researcher at Karolinska Institute's Department of Clinical Neuroscience in Sweden, said in a news release. "Our study shows that the endogenous opioid system affects how sensitive we are and may explain why some people develop post-traumatic stress disorder, PTSD, merely by observing others who are experiencing traumatic events."

For example, people with over-sensitive endogenous opioid systems might become anxious in the wake of a terror attack, even if they weren't present or near the attack.

To test the role of the endogenous opioid system, researchers used drugs to the block the opioid system in the brains of 22 healthy subjects. Another 21 subjects were given a placebo pill.

Each group of study participants were made to watch a video of people being subjected to electrical shocks.

Previous research has showed surprise to trigger the brain's catalogue of fear. If a person isn't surprised, the brain won't update its log of fears. By blocking the subjects' opioid systems, researchers ensured each participant would remain surprised even though they knew the video subject was about to be shocked.

As a result, the brain continued to update its reservoir of fearful memories.

"When the people participating in the experiment were themselves subjected to threatening stimuli that they had previously associated with other people's pain, they perspired more and displayed more fear than those who had been given a placebo," said lead researcher Andreas Olsson, senior lecturer at Karolinska Institutute. "This enhanced learning was even visible three days after the social learning episode."

The researchers published their analysis of the endogenous opioid system in journal Nature Communications.

DISASTER MANAGEMENT
Brazil president backtracks on troop deployment after riots
Brasilia (AFP) May 25, 2017
Brazil's President Michel Temer called troops off the streets of the capital Thursday, backtracking after deploying them to guard government buildings following riots by protesters demanding his resignation. Critics interpreted the troop deployment as a sign of desperation by a president fighting for his political life after a corruption scandal reached his doorstep. A decree published o ... read more

Related Links
Bringing Order To A World Of Disasters
A world of storm and tempest
When the Earth Quakes


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

DISASTER MANAGEMENT
UN braces for up to 200,000 Iraqis to flee Mosul

Why civilian deaths in Iraq and Syria are increasing

Airbus Foundation and Airbus BizLab seek innovative concepts for humanitarian challenges

Witnesses to trauma can develop irrational fears

DISASTER MANAGEMENT
One-dimensional crystals for low-temperature thermoelectric cooling

New theory predicts wetted area of droplets colliding with flat surface

Physicists discover mechanism behind granular capillary effect

Collecting real-time data for material microstructural evolution during radiation exposure

DISASTER MANAGEMENT
Researchers untangle causes of differences in East Coast sea level rise

LA lawns use 70 billion gallons of water a year

Great Barrier Reef bleaching worse than first thought

How X-rays helped to solve mystery of floating rocks

DISASTER MANAGEMENT
Methane seeping from Arctic seabed may have an upside

NASA's Arctic Ecosystem Science Flights Begin

Elevation could help explain why Antarctica is warming slower than Arctic

China says no mining planned in Antarctica

DISASTER MANAGEMENT
In China, maggots finish plates, and food waste

Bordeaux pins hopes for ravaged vineyards on June bloom

Bordeaux pins hopes for ravaged vineyards on June bloom

Helping plants pump iron

DISASTER MANAGEMENT
Study explains severity of 9.2 magnitude Sumatra earthquake

Sri Lanka deploys thousands of troops as flood toll climbs to 169

Expect above-average Atlantic hurricane season, US forecasters say

Sri Lanka deploys more troops as flood toll climbs to 180

DISASTER MANAGEMENT
Biafra's military veterans: no regrets, 50 years on

Africa, so close yet so far from G7 summit

Rwanda to control presidential candidates' social media use

Nigeria seizes illegal arms shipment

DISASTER MANAGEMENT
New hypothesis about the origin of humankind suggests oldest hominin lived in Europe

Portions of human skeletal structure were established millions of years earlier than previously thought,

Study reveals architecture of the 'second brain,' the enteric nervous system

'Moral enhancement' technologies are neither feasible nor wise




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement