People with PTSD may have trouble suppressing memories—good and bad

paris friday roundup photo videosixteenbynine
Credit: New York Times

One question the researchers want to explore through the lens of the [November 13, 2015] Paris attacks is why some people who experience trauma develop PTSD, while others do not.

The researchers designed a behavioral experiment in which the volunteers memorized word-image pairs, to the point where, upon seeing one of the words on a screen, the participants would automatically think of the associated image. The researchers then had the participants lie down in an fMRI machine and try to avoid recalling some of the images they’d just been trained to think of: if a cue word appeared in red, they were to try to prevent the associated image from entering their awareness, or to push it out of their thoughts if it did so.

Related article:  More than a brain relay station: Thalamus could be key to higher level thinking

The researchers found that participants differed in the amount of connectivity between certain brain regions—specifically, between inhibitory control regions of the prefrontal cortex and structures involved in memory such as the hippocampus. People with PTSD showed much weaker connections between these regions than did people without the disorder. “It seems that vulnerable individuals have a problem with control,” says [neuroscientist Karen] Ersche, who wrote a perspective article that accompanied the study but was not involved in the research. “What I really liked about this paper is it says it’s not the severity of the trauma that leads to PTSD; it’s the ability to control it. And that is key.”

Read the or—iginal post

Outbreak
Outbreak Daily Digest
Biotech Facts & Fallacies
Talking Biotech
Genetics Unzipped
can you boost your immune system to prevent coronavirus spread x

Video: How to boost your immune system to guard against COVID and other illnesses

Scientists have recently developed ways to measure your immune age. Fortunately, it turns out your immune age can go down ...
mag insects image superjumbo v

Disaster interrupted: Which farming system better preserves insect populations: Organic or conventional?

A three-year run of fragmentary Armageddon-like studies had primed the journalism pumps and settled the media framing about the future ...
dead bee desolate city

Are we facing an ‘Insect Apocalypse’ caused by ‘intensive, industrial’ farming and agricultural chemicals? The media say yes; Science says ‘no’

The media call it the “Insect Apocalypse”. In the past three years, the phrase has become an accepted truth of ...
globalmethanebudget globalcarbonproject cropped x

Infographic: Cows cause climate change? Agriculture scientist says ‘belching bovines’ get too much blame

A recent interview by Caroline Stocks, a UK journalist who writes about food, agriculture and the environment, of air quality ...
organic hillside sweet corn x

Organic v conventional using GMOs: Which is the more sustainable farming?

Many consumers spend more for organic food to avoid genetically modified products in part because they believe that “industrial agriculture” ...
benjamin franklin x

Are most GMO safety studies funded by industry?

The assertion that biotech companies do the research and the government just signs off on it is false ...
gmo corn field x

Do GMO Bt (insect-resistant) crops pose a threat to human health or the environment?

Bt is a bacterium found organically in the soil. It is extremely effective in repelling or killing target insects but ...
favicon

Environmental Working Group: EWG challenges safety of GMOs, food pesticide residues

Known by some as the "Environmental Worrying Group," EWG lobbies for tighter GMO legislation and famously puts out annual "dirty dozen" list of fruits and ...
m hansen

Michael Hansen: Architect of Consumers Union ongoing anti-GMO campaign

Michael K. Hansen (born 1956) is thought by critics to be the prime mover behind the ongoing campaign against agricultural biotechnology at Consumer Reports. He is an ...
News on human & agricultural genetics and biotechnology delivered to your inbox.
Optional. Mail on special occasions.
Send this to a friend