The Unexpected Influence of Napping on the Brain Revealed 0 12

Even a short nap helps the brain recover and better absorb new information. This conclusion was reached by researchers from the University of Geneva and the Freiburg University Medical Center. The results of the study were published in the journal NeuroImage.

The scientists showed that about 40–50 minutes of daytime sleep is enough to reduce the overload of neural connections that accumulates during an active day. During wakefulness, the connections between nerve cells gradually strengthen, which is important for learning, but over time this leads to saturation and a decrease in the ability to perceive new information. Sleep initiates a process of a kind of 'synaptic cleansing,' freeing up the brain's resources.

The experiment involved 20 healthy young adults who either napped or stayed awake on different days. Using electroencephalography and transcranial magnetic stimulation, the researchers assessed the flexibility and readiness of neural networks for learning. After a nap, the participants' brains showed a lower overall level of activity in connections, but a higher ability to form new ones, indicating a restorative effect.

According to the authors, the data explain why people often find it easier to concentrate and learn after a short nap. This effect can be particularly beneficial under high mental load—during studying, work, sports, or professions where attention and accuracy are important. The researchers emphasize that this refers specifically to short naps, not a replacement for full nighttime rest.