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Yakoub Y, Gonzalez-Ortiz F, Ashton NJ, Déry C, Strikwerda-Brown C, St-Onge F, Ourry V, Schöll M, Geddes MR, Ducharme S, Montembeault M, Rosa-Neto P, Soucy JP, Breitner JCS, Zetterberg H, Blennow K, Poirier J, Villeneuve S. Plasma p-tau217 predicts cognitive impairments up to ten years before onset in normal older adults. medRxiv 2024:2024.05.09.24307120. [PMID: 38766113 PMCID: PMC11100946 DOI: 10.1101/2024.05.09.24307120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Importance Positron emission tomography (PET) biomarkers are the gold standard for detection of Alzheimer amyloid and tau in vivo . Such imaging can identify cognitively unimpaired (CU) individuals who will subsequently develop cognitive impartment (CI). Plasma biomarkers would be more practical than PET or even cerebrospinal fluid (CSF) assays in clinical settings. Objective Assess the prognostic accuracy of plasma p-tau217 in comparison to CSF and PET biomarkers for predicting the clinical progression from CU to CI. Design In a cohort of elderly at high risk of developing Alzheimer's dementia (AD), we measured the proportion of CU individuals who developed CI, as predicted by Aβ (A+) and/or tau (T+) biomarker assessment from plasma, CSF, and PET. Results from each method were compared with (A-T-) reference individuals. Data were analyzed from June 2023 to April 2024. Setting Longitudinal observational cohort. Participants Some 228 participants from the PREVENT-AD cohort were CU at the time of biomarker assessment and had 1 - 10 years of follow-up. Plasma was available from 215 participants, CSF from 159, and amyloid- and tau-PET from 155. Ninety-three participants had assessment using all three methods (main group of interest). Progression to CI was determined by clinical consensus among physicians and neuropsychologists who were blind to plasma, CSF, PET, and MRI findings, as well as APOE genotype. Exposures Plasma Aβ 42/40 was measured using IP-MS; CSF Aβ 42/40 using Lumipulse; plasma and CSF p-tau217 using UGOT assay. Aβ-PET employed the 18 F-NAV4694 ligand, and tau-PET used 18 F-flortaucipir. Main Outcome Prognostic accuracy of plasma, CSF, and PET biomarkers for predicting the development of CI in CU individuals. Results Cox proportional hazard models indicated a greater progression rate in all A+T+ groups compared to A-T-groups (HR = 6.61 [95% CI = 2.06 - 21.17] for plasma, 3.62 [1.49 - 8.81] for CSF and 9.24 [2.34 - 36.43] for PET). The A-T+ groups were small, but also characterized with individuals who developed CI. Plasma biomarkers identified about five times more T+ than PET. Conclusion and relevance Plasma p-tau217 assessment is a practical method for identification of persons who will develop cognitive impairment up to 10 years later. Key Points Question: Can plasma p-tau217 serve as a prognostic indicator for identifying cognitively unimpaired (CU) individuals at risk of developing cognitive impairments (CI)?Findings: In a longitudinal cohort of CU individuals with a family history of sporadic AD, almost all individuals with abnormal plasma p-tau217 concentrations developed CI within 10 years, regardless of plasma amyloid levels. Similar findings were obtained with CSF p-tau217 and tau-PET. Fluid p-tau217 biomarkers had the main advantage over PET of identifying five times more participants with elevated tau.Meaning: Elevated plasma p-tau217 levels in CU individuals strongly indicate future clinical progression.
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Walker CS, Li L, Baracchini G, Tremblay-Mercier J, Spreng RN, Geddes MR. Neurobehavioral mechanisms influencing the association between generativity, the desire to promote well-being of younger generations, and purpose in life in older adults at risk for Alzheimer's disease. J Gerontol B Psychol Sci Soc Sci 2024:gbae060. [PMID: 38623965 DOI: 10.1093/geronb/gbae060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Indexed: 04/17/2024] Open
Abstract
OBJECTIVES Generativity, the desire and action to improve the well-being of younger generations, is associated with purpose in life among older adults. However, the neurobehavioral factors supporting the relationship between generativity and purpose in life remain unknown. This study aims to identify the functional neuroanatomy of generativity and mechanisms linking generativity with purpose in life in at-risk older adults. METHODS Fifty-eight older adults (mean age = 70.8, SD = 5.03, 45 females) with a family history of Alzheimer's disease (AD) were recruited from the PREVENT-AD cohort. Participants underwent brain imaging and completed questionnaires assessing generativity, social support, and purpose in life. Mediation models examined whether social support mediated the association between generativity and purpose in life. Seed-to-voxel analyses investigated the association between generativity and resting-state functional connectivity (rsFC) to the ventromedial prefrontal cortex (vmPFC) and ventral striatum (VS), and whether this rsFC moderated the relationship between generativity and purpose in life. RESULTS Affectionate social support mediated the association between generative desire and purpose in life. Generative desire was associated with rsFC between VS and precuneus, and, vmPFC and right dorsolateral prefrontal cortex (rdlPFC). The vmPFC-rdlPFC rsFC moderated the association between generative desire and purpose in life. DISCUSSION These findings provide insight into how the brain supports complex social behavior and, separately, purpose in life in at-risk aging. Affectionate social support may be a putative target process to enhance purpose in life in older adults. This knowledge contributes to future developments of personalized interventions that promote healthy aging.
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Affiliation(s)
- Caitlin S Walker
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Linda Li
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Canada
| | - Giulia Baracchini
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Centre for Studies in the Prevention of Alzheimer's Disease, Douglas Mental Health Institute, McGill University, Montreal, Quebec, Canada
| | - Jennifer Tremblay-Mercier
- Centre for Studies in the Prevention of Alzheimer's Disease, Douglas Mental Health Institute, McGill University, Montreal, Quebec, Canada
| | - R Nathan Spreng
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Centre for Studies in the Prevention of Alzheimer's Disease, Douglas Mental Health Institute, McGill University, Montreal, Quebec, Canada
| | - Maiya R Geddes
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Centre for Studies in the Prevention of Alzheimer's Disease, Douglas Mental Health Institute, McGill University, Montreal, Quebec, Canada
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Noriega de la Colina A, Morris TP, Kramer AF, Kaushal N, Geddes MR. Your move: A precision medicine framework for physical activity in aging. NPJ Aging 2024; 10:16. [PMID: 38413658 PMCID: PMC10899613 DOI: 10.1038/s41514-024-00141-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 01/31/2024] [Indexed: 02/29/2024]
Affiliation(s)
- Adrián Noriega de la Colina
- The Montreal Neurological Institute-Hospital, McGill University, 3801 Rue University, Montréal, QC, Canada.
- Department of Neurology and Neurosurgery, Faculty of Medicine and Human Sciences, McGill University, 3801 Rue University, Montréal, QC, Canada.
| | - Timothy P Morris
- Department of Physical Therapy, Movement and Rehabilitation Sciences, Northeastern University, Boston, USA
| | - Arthur F Kramer
- Center for Cognitive and Brain Health, Northeastern University, Boston, USA
| | - Navin Kaushal
- School of Health & Human Sciences, Indiana University, Indiana, USA
| | - Maiya R Geddes
- The Montreal Neurological Institute-Hospital, McGill University, 3801 Rue University, Montréal, QC, Canada
- Department of Neurology and Neurosurgery, Faculty of Medicine and Human Sciences, McGill University, 3801 Rue University, Montréal, QC, Canada
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Ai M, Morris TP, Noriega de la Colina A, Thovinakere N, Tremblay-Mercier J, Villeneuve S, H Hillman C, Kramer AF, Geddes MR. Midlife physical activity engagement is associated with later-life brain health. Neurobiol Aging 2024; 134:146-159. [PMID: 38091752 DOI: 10.1016/j.neurobiolaging.2023.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 11/02/2023] [Accepted: 11/06/2023] [Indexed: 01/02/2024]
Abstract
The relationship between midlife physical activity (PA), and cognition and brain health in later life is poorly understood with conflicting results from previous research. Investigating the contribution of midlife PA to later-life cognition and brain health in high-risk populations will propel the development of health guidance for those most in need. The current study examined the association between midlife PA engagement and later-life cognition, grey matter characteristics and resting-state functional connectivity in older individuals at high-risk for Alzheimer's disease. The association between midlife PA and later-life cognitive function was not significant but was moderated by later-life PA. Meanwhile, greater midlife moderate-to-vigorous PA was associated with greater grey matter surface area in the left middle frontal gyrus. Moreover, greater midlife total PA was associated with diminished functional connectivity between bilateral middle frontal gyri and middle cingulum, supplementary motor areas, and greater functional connectivity between bilateral hippocampi and right cerebellum, Crus II. These results indicate the potentially independent contribution of midlife PA to later-life brain health.
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Affiliation(s)
- Meishan Ai
- Department of Psychology, Northeastern University, Boston, MA 02115, USA.
| | - Timothy P Morris
- Department of Physical Therapy, Movement and Rehabilitation Sciences, Northeastern University, Boston, MA 02115, USA
| | - Adrián Noriega de la Colina
- Department of Neurology and Neurosurgery, Faculty of Medicine, McGill University, Montreal, Quebec H3G 2M1, Canada
| | | | - Jennifer Tremblay-Mercier
- STOP-AD CENTRE, Centre for Studies on Prevention of Alzheimer's Disease, Montreal, Quebec H4H 1R3, Canada; Douglas Mental Health University Institute Research Centre, Affiliated with McGill University, Montreal, Quebec H4H 1R3, Canada
| | - Sylvia Villeneuve
- STOP-AD CENTRE, Centre for Studies on Prevention of Alzheimer's Disease, Montreal, Quebec H4H 1R3, Canada; Douglas Mental Health University Institute Research Centre, Affiliated with McGill University, Montreal, Quebec H4H 1R3, Canada; Department of Psychiatry, McGill University, Montreal, Quebec H3A 1A1, Canada
| | - Charles H Hillman
- Department of Psychology, Northeastern University, Boston, MA 02115, USA; Department of Physical Therapy, Movement and Rehabilitation Sciences, Northeastern University, Boston, MA 02115, USA
| | - Arthur F Kramer
- Department of Psychology, Northeastern University, Boston, MA 02115, USA; Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana Champaign, Urbana-Champaign, IL 61801, USA
| | - Maiya R Geddes
- Department of Neurology and Neurosurgery, Faculty of Medicine, McGill University, Montreal, Quebec H3G 2M1, Canada; Montreal Neurological Institute, Montreal, Quebec H3A 2B4, Canada; STOP-AD CENTRE, Centre for Studies on Prevention of Alzheimer's Disease, Montreal, Quebec H4H 1R3, Canada
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Walker CS, Li L, Baracchini G, Tremblay-Mercier J, Spreng RN, Geddes MR. The influence of generativity on purpose in life is mediated by social support and moderated by prefrontal functional connectivity in at-risk older adults. bioRxiv 2023:2023.02.26.530089. [PMID: 36909532 PMCID: PMC10002691 DOI: 10.1101/2023.02.26.530089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Objectives Generativity, the desire and action to improve the well-being of younger generations, is positively associated with purpose in life among older adults. However, the neural basis of generativity and the neurobehavioral factors supporting the relationship between generativity and purpose in life remain unknown. This study aims to identify the functional neuroanatomy of generativity and mechanisms linking generativity with purpose in life in at-risk older adults. Methods Fifty-eight cognitively healthy older adults (mean age = 70.78, 45 females) with a family history of Alzheimer's disease were recruited from the PREVENT-AD aging cohort. Participants underwent brain imaging and completed questionnaires assessing generativity, social support, and purpose in life. Mediation models examined whether social support mediated the association between generativity and purpose in life. Seed-to-voxel analyses investigated the association between resting-state functional connectivity (rsFC) to the ventromedial prefrontal cortex (vmPFC) and ventral striatum (VS) and whether this rsFC moderated the relationship between generativity and purpose in life. Results Affectionate social support mediated the association between generative desire and purpose in life. Generative desire was associated with rsFC between VS and precuneus and vmPFC and right dorsolateral prefrontal cortex (rdlPFC). The vmPFC-rdlPFC connectivity moderated the association between generative desire and purpose in life. Discussion These findings provide insight into how the brain supports social behavior and, separately, purpose in life in at-risk aging. Affectionate social support may be a putative target process to enhance purpose and life in older adults. This knowledge contributes to future developments of personalized interventions that promote healthy aging.
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Affiliation(s)
- Caitlin S. Walker
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Linda Li
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Canada
| | - Giulia Baracchini
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Research Centre of the Douglas Mental Health Institute, Montreal, Quebec, Canada
| | - Jennifer Tremblay-Mercier
- Centre for Studies in the Prevention of Alzheimer’s Disease, Douglas Mental Health Institute, McGill University, Montreal, Quebec, Canada
- Research Centre of the Douglas Mental Health Institute, Montreal, Quebec, Canada
| | - R. Nathan Spreng
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Centre for Studies in the Prevention of Alzheimer’s Disease, Douglas Mental Health Institute, McGill University, Montreal, Quebec, Canada
- Research Centre of the Douglas Mental Health Institute, Montreal, Quebec, Canada
- McConnell Brain Imaging Centre (BIC), MNI, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | | | - Maiya R. Geddes
- Department of Neurology and Neurosurgery, Montreal Neurological Institute (MNI), Faculty of Medicine, McGill University, Montreal, Quebec, Canada
- Centre for Studies in the Prevention of Alzheimer’s Disease, Douglas Mental Health Institute, McGill University, Montreal, Quebec, Canada
- Research Centre of the Douglas Mental Health Institute, Montreal, Quebec, Canada
- McGill University Research Centre for Studies in Aging, McGill University, Montreal, Quebec, Canada
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Ai M, Morris TP, Zhang J, de la Colina AN, Tremblay-Mercier J, Villeneuve S, Whitfield-Gabrieli S, Kramer AF, Geddes MR. Resting-state MRI functional connectivity as a neural correlate of multidomain lifestyle adherence in older adults at risk for Alzheimer's disease. Sci Rep 2023; 13:7487. [PMID: 37160915 PMCID: PMC10170147 DOI: 10.1038/s41598-023-32714-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 03/30/2023] [Indexed: 05/11/2023] Open
Abstract
Prior research has demonstrated the importance of a healthy lifestyle to protect brain health and diminish dementia risk in later life. While a multidomain lifestyle provides an ecological perspective to voluntary engagement, its association with brain health is still under-investigated. Therefore, understanding the neural mechanisms underlying multidomain lifestyle engagement, particularly in older adults at risk for Alzheimer's disease (AD), gives valuable insights into providing lifestyle advice and intervention for those in need. The current study included 139 healthy older adults with familial risk for AD from the Prevent-AD longitudinal aging cohort. Self-reported exercise engagement, cognitive activity engagement, healthy diet adherence, and social activity engagement were included to examine potential phenotypes of an individual's lifestyle adherence. Two adherence profiles were discovered using data-driven clustering methodology [i.e., Adherence to healthy lifestyle (AL) group and Non-adherence to healthy lifestyle group]. Resting-state functional connectivity matrices and grey matter brain features obtained from magnetic resonance imaging were used to classify the two groups using a support vector machine (SVM). The SVM classifier was 75% accurate in separating groups. The features that show consistently high importance to the classification model were functional connectivity mainly between nodes located in different prior-defined functional networks. Most nodes were located in the default mode network, dorsal attention network, and visual network. Our results provide preliminary evidence of neurobiological characteristics underlying multidomain healthy lifestyle choices.
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Affiliation(s)
- Meishan Ai
- Department of Psychology, Northeastern University, Boston, MA, USA.
| | - Timothy P Morris
- Department of Physical Therapy, Movement and Rehabilitation Sciences, Northeastern University, Boston, MA, USA
| | - Jiahe Zhang
- Department of Psychology, Northeastern University, Boston, MA, USA
| | | | - Jennifer Tremblay-Mercier
- STOP-AD Centre, Centre for Studies on Prevention of Alzheimer's Disease, Montreal, QC, Canada
- Douglas Mental Health University Institute Research Centre, Affiliated with, McGill University, Montreal, QC, Canada
| | - Sylvia Villeneuve
- STOP-AD Centre, Centre for Studies on Prevention of Alzheimer's Disease, Montreal, QC, Canada
- Douglas Mental Health University Institute Research Centre, Affiliated with, McGill University, Montreal, QC, Canada
- Department of Psychiatry, McGill University, Montreal, QC, Canada
| | | | - Arthur F Kramer
- Department of Psychology, Northeastern University, Boston, MA, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana Champaign, Urbana-Champaign, IL, USA
| | - Maiya R Geddes
- Department of Neurology and Neurosurgery, Faculty of Medicine, McGill University, Montreal, QC, Canada
- STOP-AD Centre, Centre for Studies on Prevention of Alzheimer's Disease, Montreal, QC, Canada
- Montreal Neurological Institute, Montreal, QC, Canada
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Ai M, Morris TP, Thovinakere N, de la Colina AN, Tremblay‐Mercier J, Villeneuve S, Kramer A, Geddes MR. Midlife and current physical activity is associated with functional brain connectivity in older age. Alzheimers Dement 2022. [DOI: 10.1002/alz.068304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | | | - Jennifer Tremblay‐Mercier
- Centre for Studies on Prevention of Alzheimer’s Disease (StoP‐AD Centre), Douglas Hospital Research Centre Montreal QC Canada
| | - Sylvia Villeneuve
- Centre for Studies on Prevention of Alzheimer’s disease (StoP‐AD Centre), Douglas Mental Health Institute Montreal QC Canada
- Department of Psychiatry, McGill University Montreal QC Canada
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Noonan MP, Geddes MR, Mars RB, Fellows LK. Characterization of structural and functional network organization after focal prefrontal lesions in humans in proof of principle study. Brain Struct Funct 2022; 227:3027-3041. [PMID: 36207644 DOI: 10.1007/s00429-022-02570-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 09/05/2022] [Indexed: 12/01/2022]
Abstract
Lesion research classically maps behavioral effects of focal damage to the directly injured brain region. However, such damage can also have distant effects that can be assessed with modern imaging methods. Furthermore, the combination and comparison of imaging methods in a lesion model may shed light on the biological basis of structural and functional networks in the healthy brain. We characterized network organization assessed with multiple MRI imaging modalities in 13 patients with chronic focal damage affecting either superior or inferior frontal gyrus (SFG, IFG) and 18 demographically matched healthy Controls. We first defined structural and functional network parameters in Controls and then investigated grey matter (GM) and white matter (WM) differences between patients and Controls. Finally, we examined the differences in functional coupling to large-scale resting state networks (RSNs). The results suggest lesions are associated with widespread within-network GM loss at distal sites, yet leave WM and RSNs relatively preserved. Lesions to either prefrontal region also had a similar relative level of impact on structural and functional networks. The findings provide initial evidence for causal contributions of specific prefrontal regions to brain networks in humans that will ultimately help to refine models of the human brain.
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Affiliation(s)
- Maryann P Noonan
- Department of Experimental Psychology, University of Oxford, Anna Watts Building, Radcliffe Observatory Quarter, Woodstock Rd, Oxford, OX2 6HG, UK.
| | - Maiya R Geddes
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Canada.,Brigham and Women's Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA, 02115, USA
| | - Rogier B Mars
- Centre for Functional MRI of the Brain (FMRIB), Wellcome Centre for Integrative Neuroimaging, Nuffield Department of Clinical Neurosciences, University of Oxford, John Radcliffe Hospital, Oxford, OX3 9DU, UK.,Donders Institute for Brain, Cognition and Behaviour, Radboud University Njmegen, Nijmegen, The Netherlands
| | - Lesley K Fellows
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Canada
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Geddes MR, O'Connell ME, Fisk JD, Gauthier S, Camicioli R, Ismail Z. Remote cognitive and behavioral assessment: Report of the Alzheimer Society of Canada Task Force on dementia care best practices for COVID-19. Alzheimers Dement (Amst) 2020; 12:e12111. [PMID: 32999916 PMCID: PMC7507991 DOI: 10.1002/dad2.12111] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 08/26/2020] [Indexed: 01/27/2023]
Abstract
INTRODUCTION Despite the urgent need for remote neurobehavioral assessment of individuals with cognitive impairment, guidance is lacking. Our goal is to provide a multi-dimensional framework for remotely assessing cognitive, functional, behavioral, and physical aspects of people with cognitive impairment, along with ethical and technical considerations. METHODS Literature review on remote cognitive assessment and multidisciplinary expert opinion from behavioral neurologists, neuropsychiatrists, neuropsychologists, and geriatricians was integrated under the auspices of the Alzheimer Society of Canada Task Force on Dementia Care Best Practices for COVID-19. Telephone and video approaches to assessments were considered. RESULTS Remote assessment is shown to be acceptable to patients and caregivers. Informed consent, informant history, and attention to privacy and autonomy are paramount. A range of screening and domain-specific instruments are available for telephone or video assessment of cognition, function, and behavior. Some neuropsychological tests administered by videoconferencing show good agreement with in-person assessment but still lack validation and norms. Aspects of the remote dementia-focused neurological examination can be performed reliably. DISCUSSION Despite challenges, current literature and practice support implementation of telemedicine assessments for patients with cognitive impairment. Convergence of data across the clinical interview, reliable and brief remote cognitive tests, and remote neurological exam increase confidence in clinical interpretation and diagnosis.
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Affiliation(s)
- Maiya R. Geddes
- Department of Neurology and NeurosurgeryMontreal Neurological InstituteMcGill UniversityMontrealCanada
- McGill Center for Studies in AgingMcGill UniversityVerdunCanada
- Departments of Psychiatry and NeurologyBrigham and Women's HospitalHarvard Medical SchoolBostonUSA
| | - Megan E. O'Connell
- Department of PsychologyUniversity of SaskatchewanSaskatoonCanada
- Canadian Center for Health & Safety in AgricultureMedicineUniversity of SaskatchewanSaskatoonCanada
| | - John D. Fisk
- Department of PsychiatryDalhousie UniversityHalifaxCanada
- Department of Psychology and NeuroscienceDalhousie UniversityHalifaxCanada
- Department of MedicineDalhousie UniversityHalifaxCanada
| | - Serge Gauthier
- McGill Center for Studies in AgingMcGill UniversityVerdunCanada
| | - Richard Camicioli
- Neuroscience and Mental Health Institute and Department of MedicineDivision of NeurologyUniversity of AlbertaEdmontonCanada
| | - Zahinoor Ismail
- Departments of Psychiatry, Clinical Neurosciences, and Community Health SciencesCumming School of MedicineUniversity of CalgaryCalgaryAlbertaCanada
- Hotchkiss Brain InstituteO'Brien Institute for Public HealthUniversity of CalgaryCalgaryAlbertaCanada
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Wang D, Belden A, Hanser SB, Geddes MR, Loui P. Resting-State Connectivity of Auditory and Reward Systems in Alzheimer's Disease and Mild Cognitive Impairment. Front Hum Neurosci 2020; 14:280. [PMID: 32765244 PMCID: PMC7380265 DOI: 10.3389/fnhum.2020.00280] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/22/2020] [Indexed: 12/16/2022] Open
Abstract
Music-based interventions (MBI) have become increasingly widely adopted for dementia and related disorders. Previous research shows that music engages reward-related regions through functional connectivity with the auditory system, but evidence for the effectiveness of MBI is mixed in older adults with mild cognitive impairment (MCI) and Alzheimer’s disease (AD). This underscores the need for a unified mechanistic understanding to motivate MBIs. The main objective of the present study is to characterize the intrinsic connectivity of the auditory and reward systems in healthy aging individuals with MCI, and those with AD. Using resting-state fMRI data from the Alzheimer’s Database Neuroimaging Initiative, we tested resting-state functional connectivity within and between auditory and reward systems in older adults with MCI, AD, and age-matched healthy controls (N = 105). Seed-based correlations were assessed from regions of interest (ROIs) in the auditory network (i.e., anterior superior temporal gyrus, posterior superior temporal gyrus, Heschl’s Gyrus), and the reward network (i.e., nucleus accumbens, caudate, putamen, and orbitofrontal cortex). AD individuals were lower in both within-network and between-network functional connectivity in the auditory network and reward networks compared to MCI and controls. Furthermore, graph theory analyses showed that the MCI group had higher clustering and local efficiency than both AD and control groups, whereas AD individuals had lower betweenness centrality than MCI and control groups. Together, the auditory and reward systems show preserved within- and between-network connectivity in MCI individuals relative to AD. These results motivate future music-based interventions in individuals with MCI due to the preservation of functional connectivity within and between auditory and reward networks at that initial stage of neurodegeneration.
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Affiliation(s)
- Diana Wang
- Harvard College, Harvard University, Cambridge, MA, United States
| | - Alexander Belden
- Music, Imaging, and Neural Dynamics Laboratory (MIND), Northeastern University, Boston, MA, United States
| | | | - Maiya R Geddes
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Psyche Loui
- Department of Music, Northeastern University, Boston, MA, United States
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Arnold Anteraper S, Guell X, Whitfield-Gabrieli S, Triantafyllou C, Mattfeld AT, Gabrieli JD, Geddes MR. Resting-State Functional Connectivity of the Subthalamic Nucleus to Limbic, Associative, and Motor Networks. Brain Connect 2018; 8:22-32. [DOI: 10.1089/brain.2017.0535] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Sheeba Arnold Anteraper
- A.A. Martinos Imaging Center, McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, Massachusetts
- Alan and Lorraine Bressler Clinical and Research Program for Autism Spectrum Disorder, Massachusetts General Hospital, Boston, Massachusetts
| | - Xavier Guell
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts
- Cognitive Neuroscience Research Unit (URNC), Department of Psychiatry and Forensic Medicine, Universitat Autonoma de Barcelona, Barcelona, Spain
| | - Susan Whitfield-Gabrieli
- A.A. Martinos Imaging Center, McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, Massachusetts
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Christina Triantafyllou
- Department of Radiology, A.A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts
| | - Aaron T. Mattfeld
- Department of Psychology, Florida International University, Miami, Florida
| | - John D. Gabrieli
- A.A. Martinos Imaging Center, McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, Massachusetts
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Maiya R. Geddes
- A.A. Martinos Imaging Center, McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, Massachusetts
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts
- Division of Cognitive and Behavioral Neurology, Brigham and Women's Hospital, Harvard University, Boston, Massachusetts
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Geddes MR, Mattfeld AT, Angeles CDL, Keshavan A, Gabrieli JD. Human aging reduces the neurobehavioral influence of motivation on episodic memory. Neuroimage 2017; 171:296-310. [PMID: 29274503 DOI: 10.1016/j.neuroimage.2017.12.053] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 12/17/2017] [Accepted: 12/18/2017] [Indexed: 11/25/2022] Open
Abstract
The neural circuitry mediating the influence of motivation on long-term declarative or episodic memory formation is delineated in young adults, but its status is unknown in healthy aging. We examined the effect of reward and punishment anticipation on intentional declarative memory formation for words using an event-related functional magnetic resonance imaging (fMRI) monetary incentive encoding task in twenty-one younger and nineteen older adults. At 24-hour memory retrieval testing, younger adults were significantly more likely to remember words associated with motivational cues than neutral cues. Motivational enhancement of memory in younger adults occurred only for recollection ("remember" responses) and not for familiarity ("familiar" responses). Older adults had overall diminished memory and did not show memory gains in association with motivational cues. Memory encoding associated with monetary rewards or punishments activated motivational (substantia nigra/ventral tegmental area) and memory-related (hippocampus) brain regions in younger, but not older, adults during the target word periods. In contrast, older and younger adults showed similar activation of these brain regions during the anticipatory motivational cue interval. In a separate monetary incentive delay task that did not require learning, we found evidence for relatively preserved striatal reward anticipation in older adults. This supports a potential dissociation between incidental and intentional motivational processes in healthy aging. The finding that motivation to obtain rewards and avoid punishments had reduced behavioral and neural influence on intentional episodic memory formation in older compared to younger adults is relevant to life-span theories of cognitive aging including the dopaminergic vulnerability hypothesis.
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Affiliation(s)
- Maiya R Geddes
- Department of Brain and Cognitive Sciences and McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge; and Brigham and Women's Hospital, Division of Cognitive and Behavioral Neurology, Harvard University, Boston, MA
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Geddes MR, Tsuchida A, Ashley V, Swick D, Fellows LK. Material-specific interference control is dissociable and lateralized in human prefrontal cortex. Neuropsychologia 2014; 64:310-9. [DOI: 10.1016/j.neuropsychologia.2014.09.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 09/04/2014] [Accepted: 09/09/2014] [Indexed: 12/30/2022]
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Abstract
Minocycline is a semisynthetic tetracycline that causes a spectrum of autoimmune adverse reactions. We report a previously healthy patient who developed a panniculitis and histopathologically proven dermatomyositis during treatment with minocycline for acne vulgaris. Her signs and symptoms resolved completely upon cessation of minocycline. This case illustrates a novel adverse effect of a widely prescribed medication.
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Affiliation(s)
- Maiya R Geddes
- Department of Neurology, McGill University, Room L7-313, 1650 Cedar Avenue, Montreal, Quebec, H3G 1A4 Canada
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Geddes MR. A break near SLITRK1: A breakthrough in Tourette syndrome. Clin Genet 2006; 69:206-8. [PMID: 16542384 DOI: 10.1111/j.1399-0004.2006.0583c.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M R Geddes
- University of British Columbia, Vancouver, BC, Canada
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