{"id":4833,"date":"2024-09-04T12:48:58","date_gmt":"2024-09-04T11:48:58","guid":{"rendered":"https:\/\/blogs.imperial.ac.uk\/imperial-medicine\/?p=4833"},"modified":"2024-11-05T11:21:27","modified_gmt":"2024-11-05T11:21:27","slug":"cognitive-health-insights","status":"publish","type":"post","link":"https:\/\/blogs.imperial.ac.uk\/imperial-medicine\/2024\/09\/04\/cognitive-health-insights\/","title":{"rendered":"Embracing sleep for cognitive health: Insights from our recent study"},"content":{"rendered":"<figure id=\"attachment_4834\" aria-describedby=\"caption-attachment-4834\" style=\"width: 2100px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" width=\"2100\" height=\"1420\" class=\"wp-image-4834 size-full\" src=\"https:\/\/blogs.imperial.ac.uk\/imperial-medicine\/files\/2024\/08\/Screenshot-2024-08-28-at-12.30.41.png\" alt=\"\" \/><figcaption id=\"caption-attachment-4834\" class=\"wp-caption-text\">Dr Raha West presenting her findings in South Korea<\/figcaption><\/figure>\n<p><strong>Are you a morning \u2018lark\u2019 or a night \u2018owl and how is this linked to brain performance? To mark Sleeptember, Dr Raha West from the Department of Surgery and Cancer explores her recent research on over 26,000 people which found those who are naturally more active in the evening scored better on intelligence, reasoning and memory tests.<\/strong><\/p>\n<hr \/>\n<p><span data-contrast=\"none\">As we slip towards Sleeptember, a month dedicated to raising awareness about the importance of sleep, it\u2019s the perfect time to reflect on the findings of our recent study published in the\u202f<\/span><a href=\"https:\/\/bmjpublichealth.bmj.com\/content\/2\/1\/e001000\"><span data-contrast=\"none\">BMJ Public Health<\/span><\/a><span data-contrast=\"none\">. Our analysis delves into how sleep duration, chronotype (whether you\u2019re a morning person or an evening person), and various health and lifestyle factors influence cognitive performance in older adults.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">The Motivation Behind Our Study<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">The importance of sleep in maintaining overall health, particularly brain health, has always intrigued me. The idea that our daily sleep patterns, including how long and when we sleep, could significantly impact our cognitive abilities led me to explore this further. <\/span><span data-contrast=\"none\">Previous<\/span><a href=\"http:\/\/ research\"><span data-contrast=\"none\"> research<\/span><\/a><span data-contrast=\"none\"> has shown that poor sleep quality and duration are linked to various health issues. Still, the specific influence of chronotypes on cognition, especially in older adults, remains under-explored.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">Methodology and Participant Selection<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Our study utilised data from the UK Biobank, which includes a comprehensive set of health information from over half a million participants aged 40 and above. We focused on 26,820 individuals who completed detailed sleep and cognitive assessments. Participants were divided into two cohorts based on the cognitive tests they completed, ensuring a robust data analysis.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">Key Findings: Sleep Duration and Cognitive Performance<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">We discovered that sleeping 7-9 hours per night is optimal for cognitive health. Both shorter and longer sleep durations were associated with poorer cognitive performance. This finding emphasise the importance of maintaining adequate sleep duration to support brain function.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><span data-contrast=\"auto\">\u00a0\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559740&quot;:480}\"><br \/>\n<\/span><\/p>\n<p><!--more--><\/p>\n<p><b><span data-contrast=\"none\">Chronotype and Cognitive Function<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Our study revealed that individuals with evening or intermediate chronotypes performed better on cognitive tests than those who identified as morning types. Interestingly, this trend contrasts with previous findings in younger populations where \u2018morningness\u2019 was often associated with better cognitive outcomes. This suggests that the relationship between chronotype and cognitive performance may evolve with age, possibly due to changes in circadian rhythms (the b<\/span><span data-contrast=\"auto\">ody&#8217;s natural 24-hour cycle that controls when you feel awake and when you feel sleep) <\/span><span data-contrast=\"none\">and brain aging.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">Surprising Elements and Broader Implications<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">One surprising aspect was the lack of a significant relationship between sleep quality and cognitive performance in our study, contrary to some previous research. This might indicate that specific aspects of insomnia, such as severity and chronicity, need more detailed consideration.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">For the average person, the main takeaway is that understanding and working with your natural sleep tendencies can be beneficial, but the most critical factor is ensuring you get the right amount of quality sleep. This balance is essential for maintaining optimal brain health and cognitive function.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">What\u2019s Next?<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Future research should focus on understanding the biological mechanisms behind these findings. Longitudinal studies are needed to explore how changes in sleep patterns over time affect cognitive health. Additionally, more diverse populations should be included to enhance the generalisability of our results.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">Practical Advice<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">For those concerned about their sleep patterns, the key takeaway is to prioritise adequate and consistent sleep. Rather than trying to drastically change your chronotype, focus on getting 7-9 hours of good-quality sleep per night. Tailor your activities to suit your natural rhythms to optimise cognitive function throughout the day.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">As we continue our research, we hope to develop more personalised recommendations that can help individuals maintain their cognitive health through better sleep practices.\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n<p><strong>Media coverage of the study<br \/>\n<\/strong><\/p>\n<p>Raha&#8217;s study garnered widespread coverage in both the UK and the US, with Raha participating in numerous interviews, including those with BBC World Service News, Bloomberg, and the Evening Standard Science and Tech Daily podcast.<\/p>\n<p>1. <a href=\"https:\/\/www.theguardian.com\/science\/article\/2024\/jul\/11\/night-owls-cognitive-function-superior-to-early-risers-study-suggests\">The Guardian article<\/a><\/p>\n<p>2. <a href=\"https:\/\/www.thetimes.com\/life-style\/celebrity\/article\/would-you-join-the-cult-5am-club-they-have-3682lkxcn\">The Times article<\/a><a id=\"menurc5o\" class=\"fui-Link ___1rxvrpe f2hkw1w f3rmtva f1ewtqcl fyind8e f1k6fduh f1w7gpdv fk6fouc fjoy568 figsok6 f1hu3pq6 f11qmguv f19f4twv f1tyq0we f1g0x7ka fhxju0i f1qch9an f1cnd47f fqv5qza f1vmzxwi f1o700av f13mvf36 f1cmlufx f9n3di6 f1ids18y f1tx3yz7 f1deo86v f1eh06m1 f1iescvh fhgqx19 f1olyrje f1p93eir f1nev41a f1h8hb77 f1lqvz6u f10aw75t fsle3fq f17ae5zn\" title=\"https:\/\/www.theguardian.com\/science\/article\/2024\/jul\/11\/night-owls-cognitive-function-superior-to-early-risers-study-suggests\" href=\"https:\/\/www.theguardian.com\/science\/article\/2024\/jul\/11\/night-owls-cognitive-function-superior-to-early-risers-study-suggests\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Link https:\/\/www.theguardian.com\/science\/article\/2024\/jul\/11\/night-owls-cognitive-function-superior-to-early-risers-study-suggests\"><\/a><\/p>\n<p><b><span data-contrast=\"none\">About the Author<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:40}\">\u00a0<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" class=\"aligncenter wp-image-4836 size-thumbnail\" src=\"https:\/\/blogs.imperial.ac.uk\/imperial-medicine\/files\/2024\/08\/Screenshot-2024-08-28-at-16.36.58-150x150.png\" alt=\"\" \/><\/p>\n<p><b><span data-contrast=\"none\">Dr Raha West\u202fis an NIHR Doctoral Research Fellow at Imperial College London, Department of Surgery &amp; Cancer,<\/span><\/b><span data-contrast=\"none\"> under the guidance of Professor Daqing Ma. With a background in Anaesthetics, Pain Medicine, and Intensive Care, Dr. West has led numerous research projects, including studies on the feasibility of perioperative intravenous lidocaine on colorectal cancer, various COVID-19 trials and an international collaboration with South Korea looking at sleep and cognitive function. She has received several awards for her research contributions, including the CEO Outstanding Research Contribution Award in 2020 (Buckinghamshire Healthcare Trust) and Winner of the Outstanding Principal Investigator Research Award in September 2020 (NIHR Thames Valley and South Midlands Clinical Research Network). Her professional journey includes significant roles such as Clinical Lead for the NIHR CRN Thames Valley and South Midlands Research Fellowship and Anaesthetic Research Lead at Buckinghamshire NHS Trust.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:true,&quot;134233118&quot;:true}\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Are you a morning \u2018lark\u2019 or a night \u2018owl and how is this linked to brain performance? To mark Sleeptember, Dr Raha West from the Department of Surgery and Cancer explores her recent research on over 26,000 people which found those who are naturally more active in the evening scored better on intelligence, reasoning and [&hellip;]<\/p>\n","protected":false},"author":1844,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[745],"tags":[306291,306283,306290],"class_list":["post-4833","post","type-post","status-publish","format-standard","hentry","category-department-of-surgery-and-cancer","tag-chronotype","tag-cognitive-health","tag-sleep"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Embracing sleep for cognitive health: Insights from our recent study - 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