Sleep Patterns in the Healthy Aged: Relationship With Intellectual Function

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Abstract
The sleep patterns of elderly subjects were found to differ from young adult levels with considerable interindividual variability in the older age group. When sleep variables were compared with the individual changes in intellectual function as measured across the 7th through 10th decades of life, a positive correlation was found between time spent in REM sleep and several longitudinal measures of mental functioning. It is suggested that some other factor, perhaps the biological changes occurring in the aging brain, underlies the changes observed here. It is also suggested that sleep changes may be a factor influencing the process of neurobiological aging and senescence.

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