A research team in Freiburg led by the neuropsychologists Prof. Dr Monika Schönauer and Dr Nora Roüast has discovered in a new study that auditory stimuli during sleep can also have undesirable consequences.
When random sounds are played during, it impaired deep sleep and alters the transmission of slow brain waves. Slow brain waves play a vital role in memory formation as they promote the exchange of information between different areas in the brain. Thus randomly played sounds during sleep hinders new memory consolidation.
“Our findings show that randomly played sounds can disrupt important processes during sleep. For memory formation, it is not only crucial that slow brain waves occur, but also how they propagate throughout the brain. It is precisely this propagation that is impaired by the sounds.”
Dr Nora Roüast , Neuropsychologist
The randomly played sounds did not shorten the total duration of sleep, but they tended to alter the composition of sleep, the participants had less time in deep sleep stage and more in lighter sleep stages. It was observed that there was less frequent occurrence of slow brain and even it only reached fewer brain regions. This alteration in the spread of slow brain waves caused poor memory retention.
These observations through light into the fact that, even sounds that have no melody or verbal content can have influence and disrupt sleep physiology which eventually affects the complex processes underlying memory formation.
Have you ever noticed any difference in recollecting memories after a poor quality sleep?
Yes, I’ve noticed that after a poor night’s sleep it’s much harder to concentrate and recall things. I learned the previous day. It’s fascinating that even random sounds not just loud noise can affect deep sleep and memory consolidation. This really highlights how important good sleep quality is for learning and brain health.
This is really interesting. We often focus on getting enough hours of sleep, but the quality of sleep seems just as important. It explains why even after a full night’s sleep, we sometimes struggle to concentrate or remember things.
Certainly! As someone active in research , I really feel the impact even with a slight Hum or oise can disrupt sleep ,and it really affects how well my mind retains information for the next day .
