{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,14]],"date-time":"2026-05-14T07:09:14Z","timestamp":1778742554658,"version":"3.51.4"},"reference-count":53,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2025,10,7]],"date-time":"2025-10-07T00:00:00Z","timestamp":1759795200000},"content-version":"vor","delay-in-days":6,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,10,1]],"date-time":"2025-10-01T00:00:00Z","timestamp":1759276800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Brain and Behavior"],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Dysfunction of brain resting\u2010state functional networks has been widely reported in sleep disorders, but their causal relationships remain controversial.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To investigate causal relationships between 191 resting\u2010state functional magnetic resonance imaging (rsfMRI) phenotypes and eight sleep disorders using bidirectional two\u2010sample Mendelian randomization (MR), with multivariable MR (MVMR) adjusting for addictive behaviors.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Genome\u2010wide association study (GWAS) data from UK Biobank and FinnGen were analyzed. Instrumental variables (IVs) were selected adhering to MR assumptions. Causal estimates were primarily derived via inverse\u2010variance weighted (IVW), with sensitivity analyses using MR\u2010Egger, weighted median, weighted mode, simple mode, and MR Pleiotropy Residual Sum and Outlier (MR\u2010PRESSO).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>We found increased functional connectivity within the salience and default mode networks in insular, cingulate, and frontal regions\u200b\u200b (OR = 0.94, 95% CI: 0.92\u20130.97, pFDR = 0.042) was causally associated with a 6% reduced risk of daytime napping. For obstructive sleep apnea (OSA), \u200b\u200belevated functional connectivity within the default mode and central executive networks localized to precuneus\/occipital regions\u200b\u200b (OR = 1.16, 95% CI: 1.08\u20131.25, pFDR = 0.042) and \u200b\u200belevated functional connectivity within the default mode and central executive networks localized to parietal\/temporal regions\u200b\u200b (OR = 1.18, 95% CI: 1.09\u20131.27, pFDR = 0.016) having a causal effect, associated with a 16% and 18% elevated risk of OSA respectively. MVMR analysis revealed that coffee intake did not confound associations between rsfMRI phenotypes and sleep disorders, while smoking, alcohol consumption, tea intake, and cannabis use may act as confounding factors affecting these links.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This study provides robust evidence for causal associations between specific rsfMRI phenotype signatures and sleep disorders. It highlights brain functional networks as potential targets for non\u2010invasive interventions, particularly within the context of addictive behaviors.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/brb3.70870","type":"journal-article","created":{"date-parts":[[2025,10,8]],"date-time":"2025-10-08T06:36:16Z","timestamp":1759905376000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Causal Relationship Between Brain Functional Networks and Sleep Disorders: A Mendelian Randomization Study"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-4643-3264","authenticated-orcid":false,"given":"Wenting","family":"Lin","sequence":"first","affiliation":[{"name":"School of Rehabilitation and Health Preservation Chengdu University of Traditional Chinese Medicine  Chengdu Sichuan 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