Graph illustrating data from a study on how sleep fragmentation affects sleep quality. More fragmented sleep reduced the amount of time spent in deep sleep,with less time in Stage 3 sleep,and Stage 4 sleep eliminated altogether | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Shockey, Gwen |
Taille de l’image : | 3744 px × 3000 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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