Both Too-Long and Too-Short Sleep Tied to Memory Changes in New Research

Long-term population studies show a non-linear link between sleep hours and memory, as global debate focuses on sleep as a pillar.

Groups sleeping too few or too many hours showed relatively lower cognitive scores.

Doctors note that uninterrupted sleep quality matters as much as quantity, with sleep apnea a key companion of decline.

Extrapolating population findings to individuals requires controlling confounders, yet the general direction is now clear.