Study expands the science on the link between sleep and dementia CNNOne Stage of Sleep Seems to Be Critical in Reducing Dementia Risk ScienceAlertPoor sleep can age your brain by 3 years; study reveals alarming link between sleep problems and brain age Hindustan TimesFind yourself canceling mid-week plans more? Here's why it could be early sign of DEMENTIA Daily MailExcessive daytime sleepiness can lead to dementia, study indicates MSN