Things went surprisingly different for them. Brain circuits had not adapted well overnight: the siren of the brain continued to sound the next morning.
And while the nocturnal exposure to the odor helped people with restful REM sleep adapt, the same exposure only made things worse for people with restless REM sleep. During sleep, 'memory traces' of experiences from the past day are spontaneously played back, like a movie.
Among all remnants of the day, a specific memory trace can be activated by presenting the same odor as the one that was present during the experience while awake. Meanwhile, memory traces are adjusted during sleep: some connections between brain cells are strengthened, others are weakened.
Restless REM sleep disturbs these nocturnal adjustments, which are essential for recovery and adaptation to distress. The findings were published on 11 July in the leading journal Current Biology. The finding can be of great importance for about two-thirds of all people with a mental disorder, as both restless REM sleep and a hyperactive amygdala are the hallmarks of post-traumatic stress disorder PTSD , anxiety disorders, depression and insomnia. People with PTSD carry their traumatic experience to the next day: people with an anxiety disorder take their greatest fear with them, people with depression their despair, and people with chronic insomnia their tension.
Authors Rick Wassing, Frans Schalkwijk and Eus van Someren predict that treatment of restless REM sleep could transdiagnostically help to process emotional memories overnight and give them a better place in the brain. Reference : Park, J.
Intravascular innate immune cells reprogrammed via intravenous nanoparticles to promote functional recovery after spinal cord injury. Proceedings of the National Academy of Sciences, Note: material may have been edited for length and content. For further information, please contact the cited source.
Experts frequently tout the value of a good night's sleep.
However, a new study casts doubt on the value of sleep time suggesting that women who experience night sweats are more vulnerable to cognitive dysfunction as their sleep duration increases. Results showed that aggregation of TDP is not harmful but actually protects cells, changing our understanding of ALS and opening the door to radically new therapeutic approaches.
Researchers have discovered that the spreading of seizures through the brain can be suppressed depending on the amount of pressure within the brain, an important discovery that may revolutionize the treatment of drug-resistant epilepsy. How To Guide. I Understand. Read Time:.
Pressure Within the Brain May Regulate Seizure Activity, New Avenue for Treatment News Researchers have discovered that the spreading of seizures through the brain can be suppressed depending on the amount of pressure within the brain, an important discovery that may revolutionize the treatment of drug-resistant epilepsy. You are here: Book reviews. The neuroscience of sleep and dreams. Ibadete Fetahu.
Emotion profiles in the dreams of men and women. The amygdala responded much less, especially in those who had had a lot of restful REM sleep and where meanwhile exposed to the specific odor. Something frightening or unpleasant does not go unnoticed. Crick, F. Sleep inspires insight.
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