Twenty healthy adults took part in an experiment in a sleep laboratory over two days. On one day, they slept between 1 p.m. and 2 p.m. On the other day, they stayed awake.
On average, the participants slept for 43 minutes. On both days, researchers measured their brain activity using electrodes and magnetic stimulation.
What happens in the brain?
The study, published in NeuroImage, sought to determine whether a short nap can help the brain absorb new knowledge.
Throughout the day, the brain receives a large number of sensory impressions. Nerve cells constantly send signals to one another.
Also read: Study finds four key risk factors present in most first heart attacks
When we learn something new, the connections between cells change. This is known as synaptic plasticity.
According to the report, the results showed that participants had a greater ability to store new information after sleeping.
A nap can therefore make the brain more prepared for learning.
Not for everyone
Sleep expert Simen Berg Saksvik from NTNU and St. Olavs Hospital believes, according to Forskning.no, that the study may help explain why daytime sleep has previously shown positive effects.
Also read: Symptoms that may indicate reduced heart function
However, he emphasizes that nighttime sleep is more important than a nap during the day.
The recommended length of an afternoon nap is usually no more than 20 minutes, which is shorter than in the experiment.
People with sleep problems or mental health disorders should avoid sleeping during the day, as it can make it more difficult to fall asleep in the evening.
Sources: Forskning.no, and NeuroImage.
Also read: Why sleep problems become more common after 60
Also read: Oral cancer may begin with minor, overlooked symptoms