Sleep Disorders

29 March 2012

Sleep disturbances hurt memory

Sleep disturbance negatively impacts the memory consolidation and enhancement that usually occurs with a good night's sleep.

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Sleep disturbance negatively impacts the memory consolidation and enhancement that usually occurs with a good night's sleep, according to a study published in the open access journal PLoS ONE.

It is becoming widely accepted that sleep is crucial for cementing long-term memory, so in this new study, the researchers went a step further to investigate whether these beneficial effects only arise after some minimum amount of continuous sleep.

The authors, led by Ina Djonlagic at Brigham and Women's Hospital in Boston, found that patients with sleep apnoea, which leads to sleep disturbances, showed significantly lower overnight improvement and plateau performance for a newly learned motor task than seen for the control group.

 Both groups had comparable initial learning performance during the training phase, suggesting that the overnight sleep disturbance was likely related to the subsequent poorer performance.

"Optimal overnight memory consolidation in humans requires a certain amount of sleep continuity independent of the total amount of sleep" conclude the authors. (EurekAlert, March 2012) 

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Dr Alison Bentley is a general practitioner who has consulted in sleep medicine and sleep disorders, in both adults and children of all ages, for almost 30 years. She also researches and publishes on a number of sleep-related topics both in formal research journals and lay publications including as editor of Sleep Matters, an educational newsletter on sleep disorders for doctors.

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