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Older adults who are excessively sleepy during the day or have significant sleep issues are at higher risk for a pre-dementia condition called motoric cognitive risk syndrome (MCR), according to a ...
National Geographic Magazine has reported that the demands of work, social activities, and the availability of 24-hour home entertainment and Internet access have caused people to sleep less now than in premodern times. [205] USA Today reported in 2007 that most adults in the USA get about an hour less than the average sleep time 40 years ago ...
Furthermore, the older adults' performances in free recall involved temporal contiguity to a lesser extent than for younger people, indicating that associations regarding contiguity become weaker with age. [19] Several reasons have been speculated as to why older adults use less effective encoding and retrieval strategies as they age.
This isn’t the first time that better sleep has been linked with a lower risk of dementia: A study published in October even found that people with sleep apnea are more likely to develop dementia.
Sleep deprivation is also implicated in impaired ability to retrieve stored long-term memories. When an aversive stimulus was included in a trial (i.e., a blowdryer blasting hot air and noise at a mouse), mice that were sleep deprived were less anxious on subsequent trials. This suggests they had not retrieved all of the memory related to the ...
Infants and young children need much more sleep than adults and older adults. Among individuals of the same age group, sleep needs are influenced by medical, environmental, behavioral factors, per ...
One-third of adults in the United States report that they usually get less than the recommended amount of sleep, according to the U.S. Centers for Disease Control.
After going through stages of REM-sleep, people with depression report feeling better, in a study done by Cartwright et al. [40] Conversely, a theory proposed by Revonsuo [41] states that when people experience negative emotions or negative events, when they sleep the REM-sleep replays such events, which is known as rehearsal. [39]