Home Today's Paper Most Popular Video Gallery Photo Gallery
Subscription Blog Signin Register
Logo
Monday, December 11, 2017 10:11:28 AM
Follow Us On: Facebook Twitter Twitter Twitter Twitter

Old memories coupled with stress increases PTSD risk

photo by

By
14th-Aug-2017       
Comments
Share your thought
Post a comment »
Read all () »

Life Desk :
Individuals tend to perceive danger even in harmless circumstances, when older memories are coupled with stress, reveals a new study published in the Proceedings of the National Academy of Sciences.
Recognizing threats is an essential function of the human mind - think "fight or flight" one that is aided by past negative experiences.
'Coupling old memories with a stressful event can make individuals perceive danger in harmless situations.'
The findings by researchers from Dell Medical School at The University of Texas at Austin, New York University and McGill University shed light on fear generalization, a core component of anxiety and stress-related disorders.
"The human mind uses cues to danger learned over time for self-defense, but certain circumstances can cause people to misidentify those cues," said Joseph Dunsmoor, lead study author and assistant professor of psychiatry at Dell Med.
"Our research reveals that stress levels and the amount of time since an adverse event promote this type of overgeneralization."
Dunsmoor conducted the research as a postdoc in the lab of Elizabeth Phelps, professor of psychology and neural science at New York University (NYU). Ross Otto, assistant professor of psychology at McGill University, also worked on the study as a postdoc at NYU.
Post-Traumatic Stress Disorder (PTSD) which affects about 8 million adults every year-is one disorder characterized by the inability to discriminate threat from safety. Fear is triggered by harmless stimuli such as a car backfiring because they serve as reminders of trauma.
By understanding how the mind identifies and responds to such triggers, scientists can develop better treatments for mental illnesses and disorders.
"These findings provide important laboratory data that helps explain why PTSD symptoms are often exacerbated during times of stress, and how repeated stress and trauma in the battlefield may lead to increased risk for PTSD," said Suzannah Creech, an associate professor of psychiatry at Dell Medical School, who was not involved in the study, but has spent her career working with veterans recovering from trauma.
"The research may help improve PTSD treatment outcomes for veterans in part by helping us understand how we may be able to prevent it in the first place," she said.
In the study, the researchers tested the effects of stress and time on a person's ability to correctly identify a cue associated with a negative outcome. Study participants heard two tones with one followed by a shock, set by the participant at the level of "highly annoying but not painful."
Then, researchers played tones in the range of the two frequencies and gauged participants' expectations of shock by self-report and data on skin responses that indicate emotional arousal.
When testing the range of tones, half of the participants were methodically primed to have higher cortisol levels through an arm ice bath, and half received a control arm bath with room temperature water.
Researchers performed the test on two groups. One group took the shock expectancy test immediately after the initial shock. The second group took the test 24 hours after the initial shock. Both groups underwent the stress/control priming activity just before the shock expectancy test.
When tested immediately after the initial shock, stress level did not significantly affect the participants fear of shock and accuracy in identifying the associated tone. However, when tested 24 hours later, stress level did heighten participants' fear response and negatively impacted their ability to identify the tone associated with shock.
The group tested 24 hours later without raised cortisol levels only had slightly heightened fear responses and retained the ability to identify the associated tone.
"The effects of stress and memory on how humans generalize fear is largely unexamined," Dunsmoor said. "This study provides new data that will help us care for people with disordered patterns of fear and worry."

Source: Eurekalert

Tariff
Add Rate

News Archive

Inside The New Nation

International »

Chinese billionaire-in-exile wants regime change in Beijing


AFP, New York :Billionaire Guo Wengui, who is seeking asylum in the United States after accusing officials in his native China of corruption, wants "a change of the regime" in Beijing and the introduction of democracy in the world's most populous country."I want to try and to have rule of ...

Editorial »

Aman harvest has no effect on rice market


PASSING the Aman harvest, rice price has not come down as government leaders earlier said and rather gone up to the dismay of the common people all over the country. Though farmers are happy with higher price; although they have suffered production loss at many places due to late receding ...

Cricket »

Players of Comilla Victorians celebrating after dismissal of Chris Gayle of Rangpur Riders during the Qualifier-2 match of the AKS Bangladesh Premier League (BPL) Twenty20 Cricket between Comilla Victorians and Rangpur Riders at the Sher-e-Bangla National Cricket Stadium in the city's Mirpur on Sunday.


Sports »

Members of Rongdhanu RDS, the runners-up of the Hedayet Hossain Memorial Night Cricket Tournament pose for a photo session at Bangladesh Ground in Old Dhaka recently.


Entertainment »

Gauhar makes to sexiest Asian list for fourth consecutive time


For the fourth consecutive year, Bollywood actress and model Gauhar Khan has been voted to the top 10 list of ‘50 Sexiest Asian Women list’ in the world. It is an annual UK poll, which has been released in London recently. The actress, who is known for her choice of ...

City »

Convenor of Nagorik Oikya Mahmudur Rahman Manna speaking at a discussion organised by 'Mayer Dak, a social organisation at the Jatiya Press Club on Sunday with a call to bring back forced disappeared people to their mothers' laps.


International »

Ex-Fox news anchor Huddy claims Trump kissed her


Huff Post :A former Fox News anchorwoman who accused Bill O'Reilly of sexually harassing her in 2011 is now claiming that Donald Trump kissed her on the lips in an elevator.Juliet Huddy said Thursday morning on the "Mornin!!! With Bill Schulz" podcast (which has a paywall) that it happened around ...

Editorial »

Dust pollution takes toll in cities’ air


PRESENCE of dust and pollution in the air of our cities has reached alarming levels. It's happening mainly due to chaotic construction works, poor management and protracted traffic jams. According to Air Quality Index Report of the Department of Environment's (DoE) "Clean Air and Sustainable Project" earlier this month, air ...

Sports »

Chanchal emerges unbeaten champion in Blitz Chess Championship


BSS, Dhaka  :Chanchal Kumar Ghosh emerged as unbeaten champion in the Blitz Chess Championship with 6.5 points after the 7th round game on Friday at E Commerce Club hall room in Uttara. Five players finished in second to sixth position with 5.5 points after the tie breaking system. They are ...

Sports »

First-place Nao Kodaira (center) of Japan stands with second-place Lee Sang-hwa (left) of South Korea and third-place Arisa Go (right) of Japan after the women's 500 meters at a World Cup speedskating event Friday in Kearns, Utah.


Entertainment »

Akshay to back out of Gulshan Kumar's biopic?


 Akshay Kumar, who has films like Padman and 2.0 lined up for 2018, has created a stir after rumors of him stepping out of the film titled Mogul came to the forefront. Mogul is a biopic on the creator of T-series, Gulshan Kumar. According to the rumors, Akshay Kumar and ...

City »

BNP Secretary General Mirza Fakhrul Islam Alamgir, among others, at a discussion organised on the occasion of 10th founding anniversary of Bangladesh Kalyan Party at the Jatiya Press Club on Saturday.


Editorial »

Mysterious theft of fertiliser from Govt depots


DESPITE fertile land loss, inclement weather and depleting irrigation water, Bangladesh's agriculture keeps contributing a fifth of the GDP each year. Along with other factors, government's policy support in the form of fertiliser subsidy plays a big part here. But misappropriation of the key agro input such as fertiliser by ...

City »

`National Committee for the Implementation of Prime Minister`s Approved Gazetted Salaries` formed a human chain in front of the Jatiya Press Club on Friday to meet its demands.


.

Entertainment »

Are Virat and Anushka getting hitched?


Over the past few days, there are some reports doing the rounds that ace cricketer Virat Kohli and Bollywood starlet Anushka Sharma are getting married. According to these reports, both these love-birds will tie the knot in Italy.  The manager of Anushka has already slammed these reports by saying these ...

 
Items that you save may be read at any time on your computer, iPad, iPhone or Android devices.
 
Are you new to our website? Do you have already an account at our website?
Create An Account Log in here
Email this news to a friend or like someone
Email:
Write a comment to this news