Specific age-correlated activation of top hierarchical motor control areas during gait-like plantar stimulation: An fMRI study.

A better understanding of gait disorders that are associated with aging is crucial to prevent adverse outcomes. The functional study of gait remains a thorny issue due to technical constraints inherent to neuroimaging procedures, as most of them require to stay supine and motionless. Using an MRI-compatible system of boots reproducing gait-like plantar stimulation, we investigated the correlation between age and brain fMRI activation during simulated gait in healthy adults. Sixty-seven right-handed healthy volunteers aged between 20 and 77 years old (49.2 ± 18.0 years; 35 women) were recruited. Two paradigms were assessed consecutively: (a) gait-like plantar stimulation and (b) chaotic and not gait-related plantar stimulation. Resulting statistical parametric maps were analyzed with a multiple-factor regression that included age and a threshold determined by Monte-Carlo simulation to fulfill a family-wise error rate correction of p < .05. In the first paradigm, there was an age-correlated activation of the right pallidum, thalamus and putamen. The second paradigm showed an age-correlated deactivation of both primary visual areas (V1). The subtraction between results of the first and second paradigms showed age-correlated activation of the right presupplementary motor area (Brodmann Area [BA] 6) and right mid-dorsolateral prefrontal cortex (BA9-10). Our results show age-correlated activity in areas that have been associated with the control of gait, highlighting the relevance of this simulation model for functional gait study. The specific progressive activation of top hierarchical control areas in simulated gait and advancing age corroborate a progressive loss of automation in healthy older adults.

Older adults with SARS-CoV-2 infection: Utility of the clinical frailty scale to predict mortality.

The objective of this study was to identify predictive factors of mortality in older adults with coronavirus disease 2019 (COVID-19), including the level of clinical frailty by using the clinical frailty scale (CFS). We analyzed medical records of all patients aged of 75 and older with a confirmed diagnosis of COVID-19 hospitalized in our Hospital between March 3 and April 25, 2020. Standardized variables were prospectively collected, and standardized care were provided to all patients. One hundred and eighty-six patients were included (mean 85.3 ± 5.78 year). The all cause 30-day mortality was 30% (56/186). At admission, dead patients were more dyspneic (57% vs. 38%, p = .014), had more often an oxygen saturation less than 94% (70% vs. 47%, p < .01) and had more often a heart rate faster than 90/min (70% vs. 42%, p < .001). Mortality increased in parallel with CFS score (p = .051) (20 deaths (36%) in 7-9 category). In multivariate analysis, CFS score (odds ratio [OR] = 1.49; confidence interval [CI] 95%, 1.01-2.19; p = .046), age (OR = 1.15; CI 95%, 1.01-1.31; p = .034), and dyspnea (OR = 5.37; CI 95%, 1.33-21.68; p = .018) were associated with all-cause 30-day mortality. It is necessary to integrate the assessment of frailty to determine care management plan of older patients with COVID-19, rather than the only restrictive criterion of age.

REview of potentially inappropriate MEDIcation pr[e]scribing in Seniors (REMEDI[e]S): French implicit and explicit criteria.

PURPOSE: To establish a consensus on both explicit and implicit criteria in order to identify potentially inappropriate prescribing (PIP) in French older people aged 75 years and over or 65 years and over with multimorbidity. METHODS: Fifteen experts in geriatrics, general practice, pharmacy, and clinical pharmacology were involved in a two-round Delphi survey to assess preliminary explicit and implicit criteria based on an extensive literature review and up-to-date evidence data. Experts were asked to rate their level of agreement using a 5-level Likert scale for inclusion of criteria and also for rationale and therapeutic alternatives. A consensus was considered as reached if at least 75% of the experts rated criteria as "strongly agreed" or "agreed." RESULTS: The new tool included a seven-step algorithm (implicit criteria) encompassing the three main domains that define PIP (i.e. overprescribing, underprescribing, and misprescribing) and 104 explicit criteria. Explicit criteria were divided into 6 tables related to inappropriate drug duplications (n = 7 criteria), omissions of medications and/or medication associations (n = 16), medications with an unfavourable benefit/risk ratio and/or a questionable efficacy (n = 39), medications with an unsuitable dose (n = 4) or duration (n = 6), drug-disease (n = 13), and drug-drug interactions (n = 19). CONCLUSION: The REMEDI[e]S tool (REview of potentially inappropriate MEDIcation pr[e]scribing in Seniors) is an original mixed tool, adapted to French medical practices, aimed at preventing PIP both at the individual level in clinical practice and the population level in large-scale studies. Therefore, its use could contribute to an improvement in healthcare professionals' prescribing practices and safer care in older adults.

COVID-19 outbreak: organisation of a geriatric assessment and coordination unit. A French example.

Older people are particularly affected by the COVID-19 outbreak because of their vulnerability as well as the complexity of health organisations, particularly in the often-compartmentalised interactions between community, hospital and nursing home actors. In this endemic situation, with massive flows of patients requiring holistic management including specific and intensive care, the appropriate assessment of each patient's level of care and the organisation of specific networks is essential. To that end, we propose here a territorial organisation of health care, favouring communication between all actors. This organisation of care is based on three key points: To use the basis of territorial organisation of health by facilitating the link between hospital settings and geriatric sectors at the regional level.To connect private, medico-social and hospital actors through a dedicated centralised unit for evaluation, geriatric coordination of care and decision support. A geriatrician coordinates this multidisciplinary unit. It includes an emergency room doctor, a supervisor from the medical regulation centre (Centre 15), an infectious disease physician, a medical hygienist and a palliative care specialist.To organise an ad hoc follow-up channel, including the necessary resources for the different levels of care required, according to the resources of the territorial network, and the creation of a specific COVID geriatric palliative care service. This organisation meets the urgent health needs of all stakeholders, facilitating its deployment and allows the sustainable implementation of a coordinated geriatric management dynamic between the stakeholders on the territory.

Tools for the Assessment of Risk-Taking Behavior in Older Adults with Mild Dementia: A Cross-Sectional Clinical Study.

Diseases such as Alzheimer's cause an alteration of cognitive functions, which can lead to increased daily risk-taking in older adults living at home. The assessment of decision-making abilities is primarily based on clinicians' global analysis. Usual neuropsychological tests such as the MoCA (Montreal Cognitive Assessment) cover most of the cognitive domains and include mental flexibility tasks. Specific behavioral tasks for risk-taking, such as the Balloon Analogue Risk Task (BART) or the Iowa Gambling Task (IGT), have been developed to assess risk-taking behavior, particularly in the field of addictology. Our cross-sectional study aims to determine whether the MoCA global cognitive assessment could be used as a substitute for behavioral tasks in the assessment of risky behavior. In the current study, 24 patients (age: 82.1 ± 5.9) diagnosed with mild dementia completed the cognitive assessment (MoCA and executive function assessment) and two behavioral risk-taking tasks (BART, simplified version of the IGT). Results revealed no relationship between scores obtained in the MoCA and behavioral decision-making tasks. However, the two tasks assessing risk-taking behavior resulted in concordant risk profiles. In addition, patients with a high risk-taking behavior profile on the BART had better Trail Making Test (TMT) scores and thus retained mental flexibility. These findings suggest that MoCA scores are not representative of risk-taking behavioral inclinations. Thus, additional clinical tests should be used to assess risk-taking behavior in geriatric settings. Executive function measures, such as the TMT, and behavioral laboratory measures, such as the BART, are recommended for this purpose.

Proactive and Ongoing Analysis and Management of Ethical Concerns in the Development, Evaluation, and Implementation of Smart Homes for Older Adults With Frailty.

Successful adoption and sustained use of smart home technology can support the aging in place of older adults with frailty. However, the expansion of this technology has been limited, particularly by a lack of ethical considerations surrounding its application. This can ultimately prevent older adults and members of their support ecosystems from benefiting from the technology. This paper has 2 aims in the effort to facilitate adoption and sustained use: to assert that proactive and ongoing analysis and management of ethical concerns are crucial to the successful development, evaluation, and implementation of smart homes for older adults with frailty and to present recommendations to create a framework, resources, and tools to manage ethical concerns with the collaboration of older adults; members of their support ecosystems; and the research, technical development, clinical, and industry communities. To support our assertion, we reviewed intersecting concepts from bioethics, specifically principlism and ethics of care, and from technology ethics that are salient to smart homes in the management of frailty in older adults. We focused on 6 conceptual domains that can lead to ethical tensions and of which proper analysis is essential: privacy and security, individual and relational autonomy, informed consent and supported decision-making, social inclusion and isolation, stigma and discrimination, and equity of access. To facilitate the proactive and ongoing analysis and management of ethical concerns, we recommended collaboration to develop a framework with 4 proposed elements: a set of conceptual domains as discussed in this paper, along with a tool consisting of reflective questions to guide ethical deliberation throughout the project phases; resources comprising strategies and guidance for the planning and reporting of ethical analysis throughout the project phases; training resources to support leadership, literacy, and competency in project teams for the analysis and management of ethical concerns; and training resources for older adults with frailty, their support ecosystems, and the public to support their awareness and participation in teams and ethical analysis processes. Older adults with frailty require nuanced consideration when incorporating technology into their care because of their complex health and social status and vulnerability. Smart homes may have a greater likelihood of accommodating users and their contexts with committed and comprehensive analysis, anticipation, and management of ethical concerns that reflect the unique circumstances of these users. Smart home technology may then achieve its desired individual, societal, and economic outcomes and serve as a solution to support health; well-being; and responsible, high-quality care.

[Willingness to age in place and anosognosia of risks in Alzheimer's disease]. / Volonté de rester à domicile et anosognosie des risques associés à la maladie neurodégénérative de type Alzheimer.

Alzheimer's disease leads to an alteration of decision-making abilities which may increase risk-taking behaviours, particularly associated anosognosia. Anticipating the progression of the disease raises a number of questions, particularly in relation to aging in place. Our qualitative study aimed to identify the arguments used by older patients with Alzheimer's disease when choosing a place to age. The study included 22 older adults, living at home, and diagnosed as mild dementia. The patients' arguments in favour of ageing in place were based mainly on the preservation of internal security, through the familiarity of places and relations as well as the maintenance of their independence and their lifestyle habits, allowing stability in their daily lives. Despite the identification of memory loss, the associated risks were minimized or hidden from the reflection on the choice of the place to age.

[Causes of medication administration errors in elderly people: a systematic review]. / Causes des erreurs médicamenteuses à l'administration chez la personne âgée : une revue de la littérature.

The elderly are particularly vulnerable to medication administration errors (MAE). To prevent these errors, it is crucial to identify and understand their causes. A review of the literature using the PRISMA method was conducted. Of 2,798 articles, 15 were included in the literature review. The causes identified were divided into 4 categories: patient-related, direct drug-related, healthcare professional-related, and organizational, teamwork, and environmental causes. It was found that the causes were many and varied (n = 56). These were mostly related to physical and cognitive disorders of the patient. Few studies of causes based on empirical data were conducted on this specific subject. The majority of studies were conducted in a health care facility and institution. Therefore, this study cannot provide a comprehensive review of all the risk factors for MAE, especially in the elderly who are capable of administering their medication on their own. To study this topic, a complementary literature review on the causes of non-adherence in the elderly would be necessary.

How do geriatricians evaluate decision-making ability for older adults with cognitive impairment? Results from an European survey.

CONTEXT: The assessment of decision-making ability of older adults with cognitive impairment is a complex challenge that geriatricians often face in relation to risk-taking situations (driving, aging in place, financial decisions, etc.). However, there are no clear and consensual practice guidelines. An overview of current practices and needs seemed necessary. METHODS: We co-created and conducted an online survey to describe practice and knowledge, among European geriatricians. The survey was structured in 3 parts: a description of the professional's practice regarding cognitive impairment, a specific questionnaire about everyday risky decision-making evaluation and an investigation of the clinician's knowledge about relevant ethical and legal recommendations. Each part consisted of both multiple choice and open questions, analyzed through descriptive statistics and qualitative analysis methods. RESULTS: Based on the responses of 123 geriatricians across Europe, our survey showed that clinical interview is the cornerstone of geriatric assessment of decision-making ability of patients with mild to moderate dementia. When faced with risk-taking dilemma situations, geriatricians tend to favor a context of safety above autonomy, but they can support risky decision-making if it is consistent with the patient's previous lifestyle, depending on the degree of risk to self and others, on the decision-making ability assessed, and if there is some form of shared decision-making. CONCLUSION: Assessing decision-making ability is challenging for geriatricians, who in our study relied more on their clinical interview and global cognitive tests than more in-depth evaluations. Supporting independent decision-making, when associated with risk-taking, requires better detection and anticipation shared with the patient environment.

Adaptations of the balloon analog risk task for neuroimaging settings: a systematic review.

Introduction: The Balloon Analog Risk Task (BART), a computerized behavioral paradigm, is one of the most common tools used to assess the risk-taking propensity of an individual. Since its initial behavioral version, the BART has been adapted to neuroimaging technique to explore brain networks of risk-taking behavior. However, while there are a variety of paradigms adapted to neuroimaging to date, no consensus has been reached on the best paradigm with the appropriate parameters to study the brain during risk-taking assessed by the BART. In this review of the literature, we aimed to identify the most appropriate BART parameters to adapt the initial paradigm to neuroimaging and increase the reliability of this tool. Methods: A systematic review focused on the BART versions adapted to neuroimaging was performed in accordance with PRISMA guidelines. Results: A total of 105 articles with 6,879 subjects identified from the PubMed database met the inclusion criteria. The BART was adapted in four neuroimaging techniques, mostly in functional magnetic resonance imaging or electroencephalography settings. Discussion: First, to adapt the BART to neuroimaging, a delay was included between each trial, the total number of inflations was reduced between 12 and 30 pumps, and the number of trials was increased between 80 and 100 balloons, enabling us to respect the recording constraints of neuroimaging. Second, explicit feedback about the balloon burst limited the decisions under ambiguity associated with the first trials. Third, employing an outcome index that provides more informative measures than the standard average pump score, along with a model incorporating an exponential monotonic increase in explosion probability and a maximum explosion probability between 50 and 75%, can yield a reliable estimation of risk profile. Additionally, enhancing participant motivation can be achieved by increasing the reward in line with the risk level and implementing payment based on their performance in the BART. Although there is no universal adaptation of the BART to neuroimaging, and depending on the objectives of a study, an adjustment of parameters optimizes its evaluation and clinical utility in assessing risk-taking.

Is research on 'smart living environments' based on unobtrusive technologies for older adults going in circles? Evidence from an umbrella review.

CONTEXT AND AIMS: To enable ageing in place, innovative and integrative technologies such as smart living environments may be part of the solution. Despite extensive published literature reviews on this topic, the effectiveness of smart living environments in supporting ageing in place, and in particular involving unobtrusive technologies, remains unclear. The main objective of our umbrella review was to synthesize evidence on this topic. METHODS: According to the PRIOR process, we included reviews from multiple databases that focused on unobtrusive technologies used to analyze and share information about older adults' behaviors and assessed the effectiveness of unobtrusive technologies to support ageing in place. Selection, extraction and quality appraisal were done independently by two reviewers. RESULTS: By synthesizing 17 published reviews that covered 191 distinct primary studies, we found that smart living environments based on unobtrusive technologies had low to moderate effectiveness to support older adults to age in place. Effectiveness appears to be strongest in the recognition of activities of daily living. The results must, however, be interpreted in light of the low overall level of evidence, i.e., low methodological value of the primary studies and poor methodological quality of the literature reviews. Most reviews concluded that unobtrusive technologies are not mature enough for widespread adoption. CONCLUSION: There is a necessity to support primary studies that can move beyond the proof-of-concept or pilot stages and expand scientific knowledge significantly on the topic. There is also an urgent need to publish high quality literature reviews to better support policy makers and funding agencies in the field of smart living environments.

Errorless learning in cognitive rehabilitation of Alzheimer's disease and primary progressive aphasia / L'apprentissage sans erreur : un principe efficace d'intervention dans la maladie d'Alzheimer et dans l'aphasie primaire progressive

Alzheimer's disease (AD) and primary progressive aphasia (PPA) are age-related neurodegenerative diseases characterized by a slowly progressive cognitive decline that significantly impacts functional autonomy. Cognitive interventions remain one of the most useful management perspectives to help patients compensate for their cognitive and functional deficits in everyday life. Errorless learning represents a set of principles and methods aimed at eliminating or minimizing errors in a learning context, which was initially applied to patients with an amnesic syndrome. In this article, we examine the effectiveness of this learning principle in the context of AD and PPA. Based on current data from the literature, errorless learning appears to be useful in (re)learning new information or procedural skills in AD and APP, such as relearning names or certain independent activities of daily living. In addition, the benefits of errorless learning are maintained at follow-up. There are, however, discrepancies in the results between studies which could reflect differences in the learning methods employed and in the parameters of the interventions. In conclusion, such interventions should primarily target learning that is useful for patients and that allows them to preserve their autonomy longer and improve their quality of life.

L'intervention cognitive demeure une des perspectives de prise en charge les plus utiles, dès la phase précoce, pour aider les patients atteints de trouble neurocognitif majeur à compenser leurs déficits cognitifs et maintenir leur indépendance fonctionnelle dans la vie quotidienne. L'apprentissage sans erreur représente un ensemble de principes et de techniques visant à éliminer ou réduire au maximum les erreurs commises dans un contexte d'apprentissage ou de réapprentissage. Dans cet article, nous examinons l'efficacité de ce principe d'apprentissage dans le contexte de la démence de type Alzheimer et de l'aphasie primaire progressive. Sur la base des données actuelles, l'apprentissage sans erreur se révèle être efficace pour (ré)apprendre de nouvelles informations ou habiletés procédurales. Dans certains cas, les gains de l'apprentissage sans erreur perdurent à long terme et ce principe d'apprentissage pourrait permettre d'augmenter la motivation et de réduire la frustration liée à l'échec et aux déficits. Il existe néanmoins des divergences dans les résultats entre les études qui pourraient refléter des différences dans les paramètres des interventions. En conclusion, ces interventions devraient cibler des apprentissages qui ont une utilité pour les patients et qui leur permettent de préserver leur indépendance plus longtemps et ainsi améliorer leur qualité de vie.

Effectiveness of smart living environments to support older adults to age in place in their community: an umbrella review protocol.

INTRODUCTION: Frailty is a vulnerable condition exposing older adults to incidental adverse health events that negatively impact their quality of life and increase health and social costs. Digital solutions may play a key role in addressing this global problem and in particular, smart living environments. Smart living environments involve a notion of measurement or collection of data via several sensors, capturing the person's behaviours in the home or the person's health status over a long period of time. It thus has great potential for home support for older adults. The objective of this umbrella review will be: (1) to document the effectiveness of smart living environments to support ageing in place for frail older adults and (2) among the reviews assessing the effectiveness of smart living environment, to gather evidence on what factors and strategies were identified as influencing the implementation process. METHODS AND ANALYSIS: We will include systematic and scoping reviews of both quantitative and qualitative primary studies with or without meta-analysis focusing on assessing the effectiveness of interventions through smart living environments to support older adults in the community to age in place. The literature search will be done through the following biomedical, technological and sociological citation databases: MEDLINE, Embase, CINAHL, Web of Science and PsycINFO, and quality assessment of the reviews will be done thought AMSTAR2 checklist. The analysis of the results will be presented in narrative form. ETHICS AND DISSEMINATION: Our review will rely exclusively on published data from secondary sources and will thus not involve any interactions with human subjects. The results will be presented at international conferences and publications. PROSPERO REGISTRATION NUMBER: CRD42021249849.

Le repérage et le diagnostic de l'état confusionnel aigu chez les personnes âgées : quels outils rapides ?

Résumé L'état confusionnel aigu (ECA) est fréquent chez les patients âgés hospitalisés induisant de graves conséquences cliniques. Malgré sa prévalence élevée, l'ECA est souvent sous-diagnostiqué. Un repérage précoce de l'ECA permettrait une prise en charge optimisée, et une diminution de l'incidence des complications. Pour cela, la validation d'outils formalisés et simples d'utilisation est nécessaire.L'objectif de cette revue narrative était de décrire les performances et l'intérêt des outils de repérage de l'ECA les plus fréquemment utilisés en pratique clinique et en recherche, dont ceux ayant une durée de passation rapide (durée inférieure à 3 minutes).Cette revue a permis d'identifier quatre outils, fréquemment utilisés, et validés sur le plan international (CAM, DRS-R-98, DOSS, MDAS), dont trois disposent d'une version française. Les temps de passation de ces outils varient entre 5 et 30 minutes. Bien qu'ils aient un niveau de preuve plus limité, d'autres outils ayant une durée de passation plus rapide, comme la 4AT, la 3D-CAM et l'UB-CAM, semblent prometteurs, notamment en raison d'excellentes performances diagnostiques. De prochaines études devront être menées afin de valider ces outils en langue française, et de mieux préciser leur utilisation et leur impact en pratique clinique. Abstract Delirium is very common in hospitalized older patients and associated with serious clinical outcomes, notably increased risk of functional decline and death. Despite its high prevalence in the hospital setting, delirium is still underdiagnosed. A better identification would allow an early management and a reduction of its complications. To achieve this, the validation of formalized, easy-to-use and quick tools for the identification of delirium and their implementation in our clinical practice are necessary.The objective of this narrative review is to describe the available tools for delirium identification most commonly used in clinical practice and in research, followed by those that are quick to very quick to complete (i.e., less than 3 minutes).This review identified 4 tools frequently used internationally (CAM, DRS-R-98, DOSS, MDAS). Their completion time varies from 5 to 30 minutes. Rapid or very rapid tools exist, with very good diagnostic performance. Among them, the 4AT, the 3D-CAM and the UB-CAM seem particularly promising. These last tools seem interesting for a large-scale implementation at the national level, but a validation in French remains to be done.

Fractures reduction with osteoporotic treatments in patients over 75-year-old: A systematic review and meta-analysis.

Background: Osteoporosis consists in the reduction of bone mineral density and increased risk of fracture. Age is a risk factor for osteoporosis. Although many treatments are available for osteoporosis, there is limited data regarding their efficacy in older people. Objective: To evaluate the efficacy of osteoporosis treatments in patients over 75 years old. Methods: We reviewed all published studies in MEDLINE, Cochrane and EMBASE including patients over 75 years old, treated by osteoporosis drugs, and focused on vertebral fractures or hip fractures. Results: We identified 4,393 records for review; 4,216 were excluded after title/abstract review. After full text review, 19 records were included in the systematic review. Most studies showed a reduction in vertebral fracture with osteoporosis treatments, but non-significant results were observed for hip fractures. Meta-analysis of 10 studies showed that lack of treatment was significantly associated with an increased risk of vertebral fractures at one (OR = 3.67; 95%CI = 2.50-5.38) and 3 years (OR = 2.19; 95%CI = 1.44-3.34), and for hip fractures at one (OR = 2.14; 95%CI = 1.09-4.22) and 3 years (OR = 1.31, 95%CI = 1.12-1.53). Conclusion: A reduction in the risk of vertebral fractures with osteoporosis treatments was observed in most of the studies included and meta-analysis showed that lack of treatment was significantly associated with an increased risk of vertebral fractures. Concerning hip fractures, majority of included studies did not show a significant reduction in the occurrence of hip fractures with osteoporotic treatments, but meta-analysis showed an increased risk of hip fractures without osteoporotic treatment. However, most of the data derived from post hoc and preplanned analyses or observational studies.

Neural Activation in Risky Decision-Making Tasks in Healthy Older Adults: A Meta-Analysis of fMRI Data.

Decision making is a complex cognitive phenomenon commonly used in everyday life. Studies have shown differences in behavioral strategies in risky decision-making tasks over the course of aging. The development of functional neuroimaging has gradually allowed the exploration of the neurofunctional bases of these behaviors. The purpose of our study was to carry out a meta-analysis on the neural networks underlying risky decision making in healthy older adults. Following the PRISMA guidelines, we systematically searched for fMRI studies of decision making in older adults using risky decision-making tasks. To perform the quantitative meta-analysis, we used the revised version of the activation likelihood estimation (ALE) algorithm. A total of 620 references were selected for initial screening. Among these, five studies with a total of 98 cognitively normal older participants (mean age: 69.5 years) were included. The meta-analysis yielded two clusters. Main activations were found in the right insula, bilateral dorsolateral prefrontal cortex (dlPFC) and left orbitofrontal cortex (OFC). Despite the limited number of studies included, our meta-analysis highlights the crucial involvement of circuits associated with both emotion regulation and the decision to act. However, in contrast to the literature on young adults, our results indicate a different pattern of hemispheric lateralization in older participants. These activations can be used as a minimum pattern of activation in the risky decision-making tasks of healthy older subjects.

Added value of functional neuroimaging to assess decision-making capacity of older adults with neurocognitive disorders: protocol for a prospective, monocentric, single-arm study (IMAGISION).

INTRODUCTION: Assessment of decision-making capacity (DMC) is essential in daily life as well as for defining a person-centred care plan. Nevertheless, in ageing, especially if signs of dementia appear, it becomes difficult to assess decision-making ability and raises ethical questions. Currently, the assessment of DMC is based on the clinician's evaluation, completed by neuropsychological tests. Functional MRI (fMRI) could bring added value to the diagnosis of DMC in difficult situations. METHODS AND ANALYSIS: IMAGISION is a prospective, monocentric, single-arm study evaluating fMRI compared with clinical assessment of DMC. The study will begin during Fall 2021 and should be completed by Spring 2023. Participants will be recruited from a memory clinic where they will come for an assessment of their cognitive abilities due to decision-making needs to support ageing in place. They will be older people over 70 years of age, living at home, presenting with a diagnosis of mild dementia, and no exclusion criteria of MRI. They will be clinically assessed by a geriatrician on their DMC, based on the neuropsychological tests usually performed. Participants will then perform a behavioural task in fMRI (Balloon Analogue Risk Task) to analyse the activation areas. Additional semistructured interviews will be conducted to explore real life implications. The main analysis will study concordance/discordance between the clinical classification and the activation of fMRI regions of interest. Reclassification as 'capable', based on fMRI, of patients for whom clinical diagnosis is 'questionable' will be considered as a diagnostic gain. ETHICS AND DISSEMINATION: IMAGISION has been authorised by a research ethics board (Comité de Protection des Personnes, Bordeaux, II) in France, in accordance with French legislation on interventional biomedical research, under the reference IDRCB number 2019-A00863-54, since 30 September 2020. Participants will sign an informed consent form. The results of the study will be presented in international peer-reviewed scientific journals, international scientific conferences and public lectures. TRIAL REGISTRATION NUMBER: NCT03931148.

How does decisional capacity evolve with normal cognitive aging: systematic review of the literature.

PURPOSE: Aging is associated with increased needs related to complex decisions, particularly in medical and social issues. However, the complexity of decision-making involves many neurological functions and structures which are potentially altered by cognitive aging. METHODOLOGY: A systematic review was conducted in accordance with PRISMA guidelines to examine changes in decision-making occurring in normal cognitive aging. The keywords "decision making" and "normal aging" were used to find the clinical studies and literature reviews focused on these changes. RESULTS: A total of 97 articles were considered in the review, and ultimately 40 articles were selected, including 30 studies and 10 literature reviews. The data from these studies were of uneven quality and too disparate to allow meta-analysis according to PRISMA criteria. Nevertheless, a key result of the analysis is the decrease of processing speed with aging. In ambiguous decision-making situations, the alteration of the ventromedial system is associated with changes in motivation profiles. These changes can be compensated by experience. However, difficulties arise for older adults in the case of one-off decisions, which are very common in the medical or medico-social domains. CONCLUSIONS: Cognitive aging is associated with a slowdown in processing speed of decision-making, especially in ambiguous situations. However, decision-making processes which are based on experience and cases in which sufficient time is available are less affected by aging. These results highlight the relativity of decision-making capacities in cognitive aging.

Investigation of opposition to diagnostic or therapeutic procedures in older people hospitalized in acute geriatric services: the OPTAH pilot study protocol.

BACKGROUND: Shared decision-making is a process that involves collaborative discussions between a patient and a care team to ensure informed healthcare decisions. This process becomes more complex when the older person's decision-making capacities are affected. In these situations, surrogate decision-making processes are used to define a person-centered care plan. Despite these processes, the implementation of the care plan defined in the best interest of the patient may nevertheless be rejected by the patient, particularly in cases of neurocognitive disorders or delirium. This concept of opposition and/or refusal is frequently used in research. This is not yet well understood in the medical literature, and there is a lack of consensus on its definition. We, therefore, explored this concept by defining opposition to diagnostic or therapeutic proposals. METHOD: Our pilot study protocol is based on a mixed methodology (epidemiological and qualitative research) to quantify this phenomenon, validate the proposed definition, and explore its core elements. Opposition and refusal of care will be quantified, and semi-structured interviews will be conducted with patients, their relatives, and referring carers. Multidisciplinary meetings that will be associated with these situations will also be observed and analyzed. Methodological approaches that can be used to explore opposition and refusal of care in a scientific, reproducible framework are presented. This methodology considers the specificities of the geriatric, polypathological population with neurocognitive disorders. DISCUSSION: Opposition and refusal of care are key concepts in clinical research on ethics, particularly in the geriatric field. These concepts are frequently mentioned in studies involving older patients but have not been specifically defined or studied. This study would undoubtedly lead to greater awareness among professional caregivers and relatives of the significance of such opposition, and more respectful interactions in these complex hospitalization cases. TRIAL REGISTRATION: ClinicalTrial.gov, NCT03373838 . Registered on 14 December 2017.

[Is opposition to care in elderly people with cognitive impairment may be considered as a refusal of care?] / Est-ce que l'opposition aux soins manifestée par une personne âgée présentant des troubles neurocognitifs constitue un refus de soin ?

Care or treatment refusal in sick people is a right recognized by law. However, this right is questioned in subjects with cognitive disorders because it is not clear if opposition or refusal to treatment is underpinned by a behavioral disorder, a lack of understanding of the care or treatment, or a refusal to continue living a life heavily impacted by the disease and reflecting a demand for autonomy. Analysis of the literature and our personal experience show that oppositional behaviors in these patients, often described as troublemakers, should be closely analyzed to understand their motivations, and to be attentive to the freedom of choice of the patients, even if their motivations are ambivalent, even contradictory. A major risk for the carers of patients with cognitive disorders is to make decisions ignoring the freedom of choice of the patient, which should be included in the guide lines to improve geriatric care with respect for vulnerable people.