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Deep Sleep’s Protective Role in Warding Off Alzheimer’s Memory Decline

New research indicates that deep sleep, also known as non-REM slow-wave sleep, could protect against memory loss in older adults burdened with Alzheimer's disease.

  • Editor Staff
  • June 6, 2023
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New research indicates that deep sleep, also known as non-REM slow-wave sleep, could protect against memory loss in older adults burdened with Alzheimer’s disease. The study found that deep sleep acts as a cognitive reserve factor, which increases resilience against the beta-amyloid protein associated with memory loss in dementia. 

Key Points: 

  1. The study was designed to investigate why some individuals with high levels of Alzheimer’s disease pathology experience significant memory problems, while others with the same level of pathology do not. The concept of cognitive reserve, specifically the role of deep sleep, was explored as a possible explanation.
  2. The study involved 62 cognitively normal older adults, half of whom had high levels of beta-amyloid (an Alzheimer’s disease indicator). Participants underwent scans to measure their beta-amyloid levels, had their sleep patterns monitored, and completed a memory test.
  3. The research revealed that individuals with high levels of beta-amyloid who also had better quality deep sleep performed better on the memory test compared to those with the same level of deposits but poorer sleep quality.
  4. Deep sleep was found to act as a protective factor, counteracting the negative effects of beta-amyloid on memory. The researchers believe that deep sleep may be a key factor in cognitive reserve and improving sleep quality could potentially mitigate the impact of Alzheimer’s disease on memory.
  5. Limitations of the study include the lack of establishing causality between sleep and memory, the possibility of other factors influencing sleep-dependent cognitive reserve, and the generalizability of the findings to the broader elderly population or those with Alzheimer’s disease. Future research may explore sleep as a cognitive reserve factor and interventions to boost sleep.

Source: https://www.psypost.org/2023/06/deep-sleep-emerges-as-potential-shield-against-alzheimers-memory-decline-164243 

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