Osorio, Ricardo S.
https://orcid.org/0000-0002-2735-9609
Mayo Clinic
Nathan Kline Institute for Psychiatric Research
Citations 2
Characterizing circadian rest–activity rhythm patterns across Alzheimer's disease continuum in Down syndrome
Giménez, Sandra , Vaqué-Alcázar, Lídia, Clos, Susana, Benejam, Bessy, Carmona-Iragui, Maria, Maure‐Blesa, Lucía, Videla, Laura, Zhu, Nuole , Altuna, Miren, Arranz, Javier, Barroeta, Isabel , Rodríguez-Baz, Íñigo, Bueno, Ana, Fernandez, Susana, Pertierra, Lucía , Alcolea, Daniel, Miller, Bruce, Ruiz, Joaquin, Wu, Hau-Tieng, Lleó, Alberto, Osorio, Ricardo S, Blessing, Esther M, Fortea, Juan, Vaqué‐Alcázar, Lídia , Clos, S. , Benejam, Bessy , Carmona‐Iragui, María , Videla, Laura , Altuna, Miren , Arranz, Javier , Rodríguez‐Baz, Íñigo , Bejanin, Alexandre , Fernández, Susana , Soriano, Laura del Hoyo , Alcolea, Daniel , Miller, Bruce L , Grinberg, Lea T. , Lisgaras, Christos Panagiotis , Lleó, Alberto , Osorio, Ricardo S. , Fortea, Juan
Alzheimer's & Dementia | April 30, 2026 | Volume: 22 | Issue: 5 | Pages: No page available
Abstract INTRODUCTION Sleep and circadian rest–activity rhythm (RAR) disruption may bidirectionally relate to Alzheimer's disease (AD). Down syndrome (DS), the most common genetic cause of AD, presents sleep disorders, yet RAR patterns across the DS‐associated AD continuum remain uncharacterized. METHODS We analyzed 7‐day wrist actigraphy in 140 adults with DS (108 asymptomatic; 32 AD dementia) and 41 unimpaired controls. General linear models, adjusted for age, sex, sleep efficiency, and obstructive sleep apnea (OSA) severity, tested group differences, with interaction terms included to evaluate group‐specific associations. RESULTS DS showed lower relative amplitude and higher nocturnal activity, already in asymptomatic individuals. Rhythm strength declined further with AD progression, while regularity and phase timing remained preserved until dementia. Findings were independent of sleep duration and OSA. DISCUSSION Adults with DS showed early RAR disturbance that progressed across the AD continuum, paralleling sporadic AD. Circadian RAR features may be scalable biomarkers of AD progression.
A conceptual framework for research on subjective cognitive decline in preclinical Alzheimer's disease
Jessen, Frank , Amariglio, Rebecca E. , Breteler, Monique M.B. , Ceccaldi, Mathieu , Chételat, Gaël , Dubois, Bruno , Dufouil, Carole , Ellis, Kathryn A. , Flier, Wiesje M. van der , Glodzik, Lidia , Harten, Argonde C. van , Leon, Mony J. de , McHugh, Pauline, Mielke, Michelle M. , Molinuevo, José Luís , Mosconi, Lisa , Osorio, Ricardo S. , Perrotin, Audrey , Petersen, Ronald C. , Rabin, Laura A., Rami, Lorena , Reisberg, Barry , Sachdev, Perminder S. , Sayette, Vincent de La , Saykin, Andrew J. , Scheltens, Philip , Shulman, Melanie , Slavin, Melissa J., Stewart, Robert , Uspenskaya, Olga, Vellas, Bruno , Visser, Pieter Jelle , Wagner, Michael , Group, Subjective Cognitive Decline Initiative (SCD‐I) Working, Boxtel, Martin P.J. van , Rentz, Dorene M. , Sperling, Reisa Anne , Stewart, Robert , Group, Subjective Cognitive Decline Initiative (SCD‐I) Working, Mielke, Michelle M , Saykin, Andrew J , Sachdev, Perminder S , van der Flier, Wiesje M , Scheltens, Philip , Molinuevo, José Luis
Alzheimer's & Dementia | May 3, 2014 | Volume: 10 | Issue: 6 | Pages: 844-852
Abstract There is increasing evidence that subjective cognitive decline (SCD) in individuals with unimpaired performance on cognitive tests may represent the first symptomatic manifestation of Alzheimer's disease (AD). The research on SCD in early AD, however, is limited by the absence of common standards. The working group of the Subjective Cognitive Decline Initiative (SCD‐I) addressed this deficiency by reaching consensus on terminology and on a conceptual framework for research on SCD in AD. In this publication, research criteria for SCD in pre‐mild cognitive impairment (MCI) are presented. In addition, a list of core features proposed for reporting in SCD studies is provided, which will enable comparability of research across different settings. Finally, a set of features is presented, which in accordance with current knowledge, increases the likelihood of the presence of preclinical AD in individuals with SCD. This list is referred to as SCD plus .