Evidence suggests that people who frequently have bad dreams in middle age may be able toFaster
Most people have bad dreams from time to time, but about 5% of adults do.Nightmares are dreams that are unpleasant enough to wake them up — at least once a week. Stress, anxiety and sleep deprivation are all potential triggers, but previous studies of people with Parkinson's disease have also linked frequent disturbing dreams to faster rates of cognitive decline and an increased risk of developing dementia in the future.
To find out if this is true for healthy adults, Dr. Abidemi Otaiku of the University of Birmingham turned to data from three previous studies that looked at people's sleep quality and then followed them for years, assessing their brain health as well as other outcomes. Among them are more than 600 middle-aged adults (from35 to 64 years) and 2,600 people aged 79 yearsand older.
Their data was analyzed usingstatistical software. The goal is to find out whether those who had more disturbing dreams experience cognitive decline and a diagnosis of dementia.
A study published in eClinicalMedicine found that middle-aged people who had bad dreams at least once a week were four times more likely to suffer fromcognitive decline over the next decade than those who rarely had nightmares. Among older participants, those who frequently reported disturbing dreams were twice as likely to have dementia in later years.
Otaiku's working hypothesis is thatneurodegeneration in the right frontal lobe of the brain makes it difficult to control emotions during sleep, which in turn leads to nightmares. “We know that neurodegenerative conditions such as Parkinson's disease and Alzheimer's disease often begin many years before diagnosis . Nightmares may be one of the earliest signs,” the scientist concludes.
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