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Topic : High levels of stress linked to poorer memory and smaller brains, study suggests
Adults with high levels of the body’s main stress hormone are more likely to have impaired memory and smaller brains than those with lower levels, according to a new study. The results, published in the medical journal of the American Academy of Neurology, suggest stress negatively affects memory and thinking skills. Levels of cortisol, a hormone which helps the body respond to stress, were measured in 2,231 people with an average age of 49 over nearly a decade. Read more Third of Britons have felt suicidal because of stress Participants were asked to take a psychological exam and assessments for memory and cognitive skills at the beginning of the study and were tested again eight years later. Researchers took a blood sample from each participant to measure cortisol levels in the blood, which were then used to separate people into low, middle and high-level groups. The results showed people with high levels of cortisol had lower scores on tests for memory and thinking skills than those with normal levels. Nearly all of the participants (2,018) were also given an MRI brain scan to measure brain volume. Researchers found the average “total cerebral brain volume” was lower in high-level participants compared to those with normal levels of cortisol. Read more HERE. ...
27/10/2018 @ 10:14 PM
(by The_Independant)
HEALTH NEWS
Topic : Alcohol 'hijacks' the brain to impair memory and cause long-lasting cravings, study suggests
A single molecular change could help explain why a few glasses of wine can impair your memory for days and why alcoholics are liable to relapse after decades of abstinence, scientists have said. US neuroscientists using fruit flies to understand the chemical levers that alcohol pulls in the brain have found a new way it changes regions linked to positive experiences and cravings. While flies have just 100,000 neurons to the 100 billion in humans they share some core features, and one of the shared areas disrupted by alcohol is key to the way animals learn to chase rewarding experiences. This could help explain why the harms of alcohol, from hangovers to more serious issues associated with addiction, are discounted by addicts, researchers from Brown University researchers said. Read more HERE. ...
27/10/2018 @ 10:08 PM
(by The_Independant)
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