Cognitive Reserve and Sleep's Impact on Older Adults | Aging-US



October 11, 2023

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  • Aging-US published this trending research paper on September 28, 2023, in Volume 15, Issue 18, entitled, “Effect of cognitive reserve on the association between slow wave sleep and cognition in community-dwelling older adults" by researchers from the Normandie University, UNICAEN, INSERM, U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), Institut Blood and Brain @ Caen-Normandie, Cyceron, France; Normandie University, UNICAEN, PSL Université, EPHE, INSERM, U1077, CHU de Caen, GIP Cyceron, NIMH, Caen, France; Neuropsychology and Functional Imaging Research Group (UR2NF), Centre for Research in Cognition and Neurosciences (CRCN), UNI - ULB Neuroscience Institute, Bruxelles 1050, Belgium; University of Liege, GIGA CRC Vivo Imaging, Liege, Belgium; University of Liege, Psychology and Neuroscience of Cognition, Liege, Belgium; Division of Psychiatry, University College London, London, United Kingdom; Département de Recherche Clinique, CHU de Caen, Caen, France; Service de Neurologie, CHU de Caen, Caen, France DOI - Corresponding author - Géraldine Rauchs - Abstract Sleep, especially slow wave sleep (SWS), is essential for cognitive functioning and is reduced in aging. The impact of sleep quality on cognition is variable, especially in aging. Cognitive reserve (CR) may be an important modulator of these effects. We aimed at investigating this question to better identify individuals in whom sleep disturbances might have greater behavioral consequences. Polysomnography and neuropsychological assessments were performed in 135 cognitively intact older adults (mean age ± SD: 69.4 ± 3.8y) from the Age-Well randomized controlled trial (baseline data). Two measures of cognitive engagement throughout life were used as CR proxies. Linear regression analyses were performed between the proportion of SWS, and executive function and episodic memory composite scores. Then, interaction analyses between SWS and CR proxies on cognition were conducted to assess the possible impact of CR on these links. SWS was positively associated with episodic memory, but not with executive function. CR proxies modulated the associations between SWS and both executive and episodic memory performance. Specifically, individuals with higher CR were able to maintain cognitive performance despite low amounts of SWS. This study provides the first evidence that CR may protect against the deleterious effects of age-related sleep changes on cognition. Sign up for free Altmetric alerts about this article - Subscribe for free publication alerts from Aging - Keywords - aging, sleep, cognitive reserve, cognition About Aging-US Launched in 2009, Aging-US publishes papers of general interest and biological significance in all fields of aging research and age-related diseases, including cancer—and now, with a special focus on COVID-19 vulnerability as an age-dependent syndrome. Topics in Aging-US go beyond traditional gerontology, including, but not limited to, cellular and molecular biology, human age-related diseases, pathology in model organisms, signal transduction pathways (e.g., p53, sirtuins, and PI-3K/AKT/mTOR, among others), and approaches to modulating these signaling pathways. Please visit our website at​​ and connect with us: SoundCloud - Facebook - X - Instagram - YouTube - LinkedIn - Pinterest - Media Contact 18009220957 MEDIA@IMPACTJOURNALS.COM


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