A nap can recalibrate homeostatic and associative synaptic plasticity in the human cortex https://www.sciencedirect.com/science/article/pii/S1053811926000418 Even a nap at lunchtime makes the brain ready to learn https://www.bluewin.ch/en/news/international/even-a-nap-at-lunchtime-makes-the-brain-ready-to-learn-3062038.html Restless sleep is more harmful to the brain than short sleep https://www.n-tv.de/wissen/Schlafqualitaet-bei-Senioren-Schlechte-Naechte-verschlechtern-geistige-Faehigkeiten-id30203262.html