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Comment: When journalists talk about science, they dumb it down and some of the things they say are imprecise and don't explain clearly enough the results. It is a very good study done by some world renown experts in the slow wave sleep. The link between slow wave sleep and memory consolidation is very well established by hundreds of studies. What was done here is to actually boost slow waves synchronization and efficiency using sounds that were locked to the brain waves of the subjects. The experimenters use the individual brain waves and created pulses of sound when a particular state of the slow waves was reached. During these states neurons fire or are silent and many important events are happening in the brain at these phases, like synapses are being pruned or reinforced to make memory stronger or weaker according to what the brain considers worthwhile to remember or discarded. The sample is small but the results are so good to make them still statistically significant. It needs to be validated by other groups but this how you do this type of study, first a pilot and then a larger group clinical study.

Comment: If you want to comment do the effort to read the paper. It is published in one of the best neuroscience journals. It is a small study but the results are statistically significant even with such small sample. It is just a pilot study and this is what you need to get fund for a more systematic clinical study. It was tested on young people but it could be very beneficial in an aging population where memory loss is a serious life impacting problem. It is not like previous studies involving sounds during sleep. The pink noise bursts were precisely synchronized to the brain waves. During slow wave sleep there are up and down states, when the neurons fire and are silent, the researcher synchronized precisely the pulses to either the up or down states of the slow waves. Only the up state seemed to increase memory and the result makes sense from a neuroscience point of view. Slow waves are implicated in many processes besides memory (metabolism, hormone regulation, aging) and boosting them through a simple and safe method as sound is a great breakthrough.