Memory and thinking in later life, and their decline.
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301 to 325 of 1,152Loss of expectation-related mechanisms in Alzheimer's disease makes analgesic therapies less effective.
Expectation/placebo-related mechanisms and specific effects of therapies show additive effects, such that a therapy is less effective if the placebo component is absent. So far, the placebo component has been disrupted experimentally by using covert administrations of treatments. Here, we show for the first time that disruption of expectation/placebo-related analgesic mechanisms may occur in a clinical condition, Alzheimer's disease (AD). In order to assess the placebo component of a therapy, we used the recently developed open-hidden paradigm. A local anesthetic was applied, either overtly or covertly, to the skin of AD patients to reduce burning pain after venipuncture. The placebo (psychological) component is represented by the difference between the analgesic effect after open (expected) and after hidden (unexpected) application. We correlated the placebo component with both cognitiv…
matched on Alzheimer Disease (mesh)
Nighttime insomnia treatment and education for Alzheimer's disease: a randomized, controlled trial.
Objectives: To evaluate whether a comprehensive sleep education program (Nighttime Insomnia Treatment and Education for Alzheimer's Disease (NITE-AD)) could improve sleep in dementia patients living at home with their family caregivers.
Design: A randomized, controlled trial.
Participants: Thirty-six community-dwelling patients with Alzheimer's disease (AD) and their family caregivers.
Intervention: All participants received written materials describing age- and dementia-related changes in sleep and standard principles of good sleep hygiene. Caregivers in active treatment (n=17) received specific recommendations about setting up and implementing a sleep hygiene program for the dementia patient and training in behavior management skills. Patients in active treatment were also instructed to walk daily and increase daytime light exposure with the use of a light box. Control subjects (n=19) …
matched on Alzheimer Disease (mesh)
Training community consultants to help family members improve dementia care: a randomized controlled trial.
Purpose: We investigated whether community consultants could be trained to teach family caregivers a systematic behavioral approach for reducing mood and behavior problems in persons with Alzheimer's disease.
Design and methods: This study consisted of a randomized controlled trial; we randomly assigned 95 family caregivers and care recipients with Alzheimer's disease to STAR-caregivers (STAR-C) or control groups. Masked interviewers conducted assessments at baseline, after treatment, and after 6 months. Consultants were master's-level health care professionals who were currently practicing in community settings serving older adults. We assessed the extent to which consultants were able to learn and adhere to the treatment protocol, and the relationship between adherence and measures of caregiver mood, burden, and care recipient mood and behavior.
Results: Community consultants were able…
matched on Alzheimer Disease (mesh)
Physical activity to improve cognition in older adults: can physical activity programs enriched with cognitive challenges enhance the effects? A systematic review and meta-analysis.
Background: Aging-related cognitive decline and cognitive impairment greatly impacts older adults' daily life. The worldwide ageing of the population and associated wave of dementia urgently calls for prevention strategies to reduce the risk of cognitive decline. Physical activity (PA) is known to improve cognitive function at older age through processes of neuroplasticity. Yet, emerging studies suggest that larger cognitive gains may be induced when PA interventions are combined with cognitive activity (CA). This meta-analysis evaluates these potential synergistic effects by comparing cognitive effects following combined PA + CA interventions to PA interventions (PA only), CA interventions (CA only) and control groups.
Methods: Pubmed, Embase, PsycInfo, CINAHL and Sportdiscus were searched for English peer-reviewed papers until April 2018. Data were extracted on cognition and factors po…
matched on cognitive decline (text), mild cognitive impairment (text)
Aarsland D, Bronnick K, Williams-Gray C, Weintraub D, Marder K, Kulisevsky J, Burn D, Barone P, Pagonabarraga J, Allcock L, Santangelo G, Foltynie T, Janvin C, Larsen JP, Barker RA, Emre M (2010)cohort or longitudinalMEDLINE-indexed journal, not yet read by usNeurology551 citations Mild cognitive impairment in Parkinson disease: a multicenter pooled analysis.
Background: In studies of mild cognitive impairment (MCI) in Parkinson disease (PD), patients without dementia have reported variable prevalences and profiles of MCI, likely to be due to methodologic differences between the studies.
Objective: The objective of this study was to determine frequency and the profile of MCI in a large, multicenter cohort of well-defined patients with PD using a standardized analytic method and a common definition of MCI.
Methods: A total of 1,346 patients with PD from 8 different cohorts were included. Standardized analysis of verbal memory, visuospatial, and attentional/executive abilities was performed. Subjects were classified as having MCI if their age- and education-corrected z score on one or more cognitive domains was at least 1.5 standard deviations below the mean of either control subjects or normative data.
Results: A total of 25.8% of subjects (95…
matched on Memory Disorders (mesh), cognitive decline (text), mild cognitive impairment (text)
Impact of caring for persons with Alzheimer's disease or dementia on caregivers' health outcomes: findings from a community based survey in Japan.
Background: This study assessed how family caregivers for patients with Alzheimer's disease (AD) or dementia in Japan differed from non-caregivers in characteristics and health outcomes (i.e., comorbidities, health-related quality of life [HRQoL], productivity, and resource use). Caregivers were hypothesized to experience significantly poorer outcomes than non-caregivers.
Methods: Data were combined from the 2012 and 2013 National Health and Wellness Survey in Japan (n = 60000). Caregivers for adult relatives with AD or dementia were compared with non-caregivers on: comorbidities (including Patient Health Questionnaire (PHQ-9) cutoff scores suggesting presence/absence of major depressive disorder (MDD)), Work Productivity and Activity Impairment (WPAI), SF-36v2-based HRQoL, and healthcare resource utilization. Sociodemographic characteristics, health characteristics and behaviors, and Ch…
matched on Alzheimer Disease (mesh), Dementia (keyword)
An aging, pathology burden, and glial senescence build-up hypothesis for late onset Alzheimer's disease.
Alzheimer's disease (AD) predominantly occurs as a late onset (LOAD) form involving neurodegeneration and cognitive decline with progressive memory loss. Risk factors that include aging promote accumulation of AD pathologies, such as amyloid-beta and tau aggregates, as well as inflammation and oxidative stress. Homeostatic glial states regulate and suppress pathology buildup; inflammatory states exacerbate pathology by releasing pro-inflammatory cytokines. Multiple stresses likely induce glial senescence, which could decrease supportive functions and reinforce inflammation. In this perspective, we hypothesize that aging first drives AD pathology burden, whereafter AD pathology putatively induces glial senescence in LOAD. We hypothesize that increasing glial senescence, particularly local senescent microglia accumulation, sustains and drives perpetuating buildup and spread of AD pathologi…
matched on Alzheimer Disease (mesh), cognitive decline (text), mild cognitive impairment (text), Amyloid beta-Peptides (mesh)
The relationship between frailty and social vulnerability: a systematic review.
Both frailty (reduced physiological reserve) and social vulnerability (scarcity of adequate social connections, support, or interaction) become more common as people age and are associated with adverse consequences. Analyses of the relationships between these constructs can be limited by the wide range of measures used to assess them. In this systematic review, we synthesised 130 observational studies assessing the association between frailty and social vulnerability, the bidirectional longitudinal relationships between constructs, and their joint associations with adverse health outcomes. Frailty, across assessment type, was associated with increased loneliness and social isolation, perceived inadequacy of social support, and reduced social participation. Each of these social vulnerability components was also associated with more rapid progression of frailty and lower odds of improvemen…
matched on Cognitive Dysfunction (mesh)
Meredith SJ, Cox NJ, Ibrahim K, Higson J, McNiff J, Mitchell S, Rutherford M, Wijayendran A, Shenkin SD, Kilgour AHM, Lim SER (2023)systematic reviewMEDLINE-indexed journal, not yet read by usAge and ageing148 citations Factors that influence older adults' participation in physical activity: a systematic review of qualitative studies.
Background: Despite the advantages of physical activity (PA), older adults are often insufficiently active to maximise health. Understanding factors that influence PA engagement will support well-designed interventions for older people. Our aim was to review the qualitative evidence exploring the factors affecting older adults' engagement in PA.
Methods: We searched six electronic databases for studies of community-dwelling older adults (≥70 years) including qualitative methods. We excluded studies of a single-disease group, individuals with cognitive impairment and care home residents. Methodological rigour was assessed with the Critical Appraisal Skills Programme, and framework synthesis was applied using the Capability Opportunity Motivation-Behaviour (COM-B) model, which hypothesises that behaviour is influenced by three factors: capability, opportunity and motivation.
Results: Twent…
matched on Cognitive Dysfunction (mesh)
The relationship between sleep disturbance and cognitive impairment in mood disorders: A systematic review.
Background: Cognitive impairment experienced by people with bipolar disorders (BD) or major depressive disorder (MDD) is associated with impaired psychosocial function and poorer quality of life. Sleep disturbance is another core symptom of mood disorders which may be associated with, and perhaps worsen, cognitive impairments. The aim of this systematic review was to critically assess the relationship between sleep disturbance and cognitive impairment in mood disorders.
Methods: In this systematic review, relevant studies were identified using electronic database searches of PsychINFO, MEDLINE, Embase and Web of Science.
Findings: Fourteen studies were included; eight investigated people with BD, five investigated people with MDD, and one included both people with MDD and people with BD. One study was an intervention for sleep disturbance and the remaining thirteen studies used either a …
matched on Cognitive Dysfunction (mesh)
A wandering mind is a forgetful mind: A systematic review on the influence of mind wandering on episodic memory encoding.
In the last two decades, mind wandering has received increased interest in the field of cognitive neuroscience. Despite the strong links between attention and memory, its effect on episodic memory encoding has only been recently investigated. To date, there is no systematic synthesis on this link. Following the PRISMA guidelines, a systematic review of the literature on mind wandering and episodic memory was conducted. Five online bibliographic databases (PsycNET, Pubmed, ScienceDirect, Web of Science and Taylor & Francis) were searched. Twenty-four studies were eligible for the current review and were compared based on their methodologies and results. Overall, stimulus-independent mind wandering appeared to be a reliable negative factor influencing the encoding of both words and audio-visual stimuli. However, a few studies pointed out a potential positive effect of stimulus-dependent mi…
matched on Memory Disorders (mesh)
The neuropsychiatric effects of vitamin C deficiency: a systematic review.
Background: Vitamin C deficiency may be more common than is generally assumed, and the association between vitamin C deficiency and adverse psychiatric effects has been known for centuries. This paper aims to systematically review the evidence base for the neuropsychiatric effects of vitamin C deficiency.
Methods: Relevant studies were identified via systematic literature review.
Results: Nine studies of vitamin C deficiency, including subjects both with and without the associated physical manifestations of scurvy, were included in this review. Vitamin C deficiency, including scurvy, has been linked to depression and cognitive impairment. No effect on affective or non-affective psychosis was identified.
Conclusions: Disparate measurement techniques for vitamin C, and differing definitions of vitamin C deficiency were apparent, complicating comparisons between studies. However, there is e…
matched on Cognitive Dysfunction (mesh)
How does childhood maltreatment influence ensuing cognitive functioning among people with the exposure of childhood maltreatment? A systematic review of prospective cohort studies.
Background: Childhood maltreatment is closely related to normal cognitive development and ensuing adverse mental health outcomes and cognitive dysfunction. Our current comprehensive systematic review examines the relationship between childhood maltreatment and cognitive functioning focusing only on prospective studies, which allow us to draw inferences about the temporal relationships among the constructs and make causal inferences.
Methods: The databases, EMBASE, HealthStar, PsychoInfo, Medline, and Cochrane Library, were searched using a systematic methodology to identify prospective studies published up to December, 2017 to explore the relationship between childhood maltreatment and cognitive functioning. Quality assessment of each study was rated using Newcastle-Ottawa-Scale (NOS).
Results: 10 articles with 11 studies were included evaluating cognitive development, memory, academic a…
matched on Cognitive Dysfunction (mesh)
Association between mental disorders, cognitive disturbances and vitamin D serum level: Current state.
Background & aims: Vitamin D deficiency has been identified as a global problem. Approximately 14% of the world population has inadequate vitamin D levels. This vitamin has been usually associated with bone disorders such as rickets, osteomalacia, and osteoporosis. However, these disorders present only a small part of all the disturbances which can be induced by its deficiency. Low serum vitamin D is associated with development of cardiovascular diseases, hypertension, neurodegenerative diseases, diabetes mellitus, metabolic syndrome and even cancer. This vitamin may be an important factor in the development of psychiatric illnesses, therefore clinicians should not leave this serious issue unresolved. The aim of this review is to describe the current data concerning the association between vitamin D serum levels, cognition and mental disorders.
Methods: We conducted a systematic bibliogr…
matched on Cognitive Dysfunction (mesh)
Cytokines and C-reactive protein alterations with respect to cognitive impairment in schizophrenia and bipolar disorder: A systematic review.
Background: The aim of this article was to perform a systematic review of studies investigating the association between peripheral levels of cytokines and C-reactive protein (CRP), cytokine gene polymorphisms and cognition in patients with schizophrenia and bipolar disorder (BD).
Methods: The following databases: PubMed, CINAHL Complete, Academic Search Complete, ERIC and Health Source: Nursing/Academic Edition databases were searched according to the PRISMA guidelines. We included studies that investigated the association between peripheral levels of CRP and cytokines, cytokine gene polymorphisms and cognitive performance in schizophrenia and/or BD patients. Subsequently, quality assessment of eligible publications was performed. Results were synthesized by discussing main findings around correlations between inflammatory markers and cognition.
Results: Most consistent results indicate …
matched on Cognitive Dysfunction (mesh)
Digital healthcare for dementia and cognitive impairment: A scoping review.
Background: Cognitive disorders, such as Alzheimer's disease, are a global health problem. Digital healthcare technology is an innovative management tool for delaying the progression of dementia and mild cognitive impairment. Thanks to digital technology, the possibility of safe and effective care for patients at home and in the community is increasing, even in situations that threaten the continuity of care, such as the COVID-19 pandemic. However, it is difficult to select appropriate technology and alternatives due to the lack of comprehensive reviews on the types and characteristics of digital technology for cognitive impairment, including their effects and limitations.
Objective: This study aims to identify the types of digital healthcare technology for dementia and mild cognitive impairment and comprehensively examine how its outcome measures were constructed in line with each techn…
matched on Cognitive Dysfunction (mesh), Dementia (keyword), cognitive decline (text), mild cognitive impairment (text)
Alzheimer's disease: history, ethics and medical humanities in the context of assisted suicide.
Introduction: Dementia diseases, especially Alzheimer's disease (AD), are of considerable importance in terms of social policy and health economics. Moreover, against the background of the current Karlsruhe judgement on the legalisation of assisted suicide, there are also questions to be asked about medical humanities in AD.
Methodology: Relevant literature on complementary forms of therapy and prognosis was included and discussed.
Results: Creative sociotherapeutic approaches (art, music, dance) and validating psychotherapeutic approaches show promise for suitability and efficiency in the treatment of dementia, but in some cases still need to be scientifically tested. Biomarker-based early diagnosis of dementia diseases is increasingly becoming a subject of debate against the background of the Karlsruhe ruling.
Discussion: Needs-oriented and resource-enhancing approaches can make a sign…
matched on Alzheimer Disease (mesh), Dementia (mesh)
Direct and indirect cost of managing alzheimer's disease and related dementias in the United States.
Introduction: Care of individuals with Alzheimer's Disease and Related Dementias (ADRD) poses special challenges. As the disease progresses, individuals with ADRD require increasing levels of medical care, caregiver support, and long-term care which can lead to substantial economic burden. Areas covered: In this expert review, we synthesized findings from studies of costs of ADRD in the United States that were published between January 2006 and February 2017, highlighted major sources of variation in costs, identified knowledge gaps and briefly outlined directions for future research and implications for policy and program planning. Expert commentary: A consistent finding of all studies comparing individuals with and without ADRD is that the average medical, non-medical, and indirect costs of individuals with ADRD are higher than those without ADRD, despite the differences in the methods…
matched on Alzheimer Disease (mesh), Dementia (mesh)
Kolanowski A, Boltz M, Galik E, Gitlin LN, Kales HC, Resnick B, Van Haitsma KS, Knehans A, Sutterlin JE, Sefcik JS, Liu W, Petrovsky DV, Massimo L, Gilmore-Bykovskyi A, MacAndrew M, Brewster G, Nalls V, Jao YL, Duffort N, Scerpella D (2017)reviewMEDLINE-indexed journal, not yet read by usNursing outlook101 citations Determinants of behavioral and psychological symptoms of dementia: A scoping review of the evidence.
Background: Behavioral and psychological symptoms of dementia (BPSD) are prevalent in people with neurodegenerative diseases.
Purpose: In this scoping review the Kales, Gitlin and Lykestos framework is used to answer the question: What high quality evidence exists for the patient, caregiver and environmental determinants of five specific BPSD: aggression, agitation, apathy, depression and psychosis?
Method: An a priori review protocol was developed; 692 of 6013 articles retrieved in the search were deemed eligible for review. Gough's Weight of Evidence Framework and the Cochrane Collaboration's tool for assessing risk of bias were used. The findings from 56 high quality/low bias articles are summarized.
Discussion: Each symptom had its own set of determinants, but many were common across several symptoms: neurodegeneration, type of dementia, severity of cognitive impairments, and declini…
matched on Alzheimer Disease (mesh), Dementia (mesh)
Llanque SM, Enriquez M (2012)reviewMEDLINE-indexed journal, not yet read by usAmerican journal of Alzheimer's disease and other dementias62 citations Interventions for Hispanic caregivers of patients with dementia: a review of the literature.
Background: The number of Hispanics/Latinos living with dementia in the United States is expected to rise from 200,000 to 1.3 million by 2050, which will result in large numbers of Hispanics/Latinos assuming the role of caregiver. The demands of caregiving can negatively impact caregivers' health. The purpose of this review was to identify intervention strategies that can help Hispanics/Latinos deal with the burden associated with providing care for older adults with dementia.
Methods: The authors critically reviewed and analyzed the literature for interventions and their relevance to these caregivers. The search engines and electronics databases of Google Scholar; Social Gerontology; Health Source: Nursing/Academic Edition; MEDLINE; PsycARTICLES; CINAHL; and PubMed, were used to locate articles published between 1999 and 2011.
Results: Ten intervention studies published between 2000 and…
matched on Alzheimer Disease (mesh), Dementia (mesh)
Strength training as a countermeasure to aging muscle and chronic disease.
Strength training (ST) has long been considered a promising intervention for reversing the loss of muscle function and the deterioration of muscle structure associated with advanced age but, until recently, the evidence was insufficient to support its role in the prevention or treatment of disease. In recent decades, there has been a long list of quality reviews examining the effects of ST on functional abilities and a few on risk factors for specific diseases, but none have provided a comprehensive assessment of ST as an intervention for a broad range of diseases. This review provides an overview of research addressing the effectiveness of ST as an intervention for the prevention or treatment of the adverse consequences of (i) aging muscle; (ii) the metabolic syndrome (MetS) and its components, i.e. insulin resistance, abdominal obesity, hyperlipidaemia and hypertension; (iii) fibromyal…
matched on Alzheimer Disease (mesh), Dementia (mesh)
Chan SW (2010)reviewMEDLINE-indexed journal, not yet read by usDementia and geriatric cognitive disorders104 citations Family caregiving in dementia: the Asian perspective of a global problem.
Background/aims: With an increasing life expectancy, the number of people suffering from dementia globally will rise to about 115.4 million by 2050. It is projected that in the 21st century, the majority of the world's older people will be living in Asia. This paper examines the global issues of family caregiving for older persons with dementia from an Asian perspective.
Methods: Literature review of published empirical studies from 1990 to October 2010.
Results: A full understanding of the specific way that culture could influence family caregivers' burdens may play an important part in the development of a holistic model for family-centered care. Well-designed psychoeducation interventions or multicomponent interventions could help in reducing caregivers' burden. With socio-economical and demographical changes, families need to be supported when taking on the caregiving role and be off…
matched on Alzheimer Disease (mesh), Dementia (mesh)
Carrión RE, Walder DJ, Auther AM, McLaughlin D, Zyla HO, Adelsheim S, Calkins R, Carter CS, McFarland B, Melton R, Niendam T, Ragland JD, Sale TG, Taylor SF, McFarlane WR, Cornblatt BA (2018)clinical trialMEDLINE-indexed journal, not yet read by usJournal of psychiatric research74 citations From the psychosis prodrome to the first-episode of psychosis: No evidence of a cognitive decline.
Cognitive deficits have an important role in the neurodevelopment of schizophrenia and other psychotic disorders. However, there is a continuing debate as to whether cognitive impairments in the psychosis prodrome are stable predictors of eventual psychosis or undergo a decline due to the onset of psychosis. In the present study, to determine how cognition changes as illness emerges, we examined baseline neurocognitive performance in a large sample of helping-seeking youth ranging in clinical state from low-risk for psychosis through individuals at clinical high-risk (CHR) for illness to early first-episode patients (EFEP). At baseline, the MATRICS Cognitive Consensus battery was administered to 322 individuals (205 CHRs, 28 EFEPs, and 89 help-seeking controls, HSC) that were part of the larger Early Detection, Intervention and Prevention of Psychosis Program study. CHR individuals were …
matched on Cognitive Dysfunction (mesh), cognitive decline (text)
Transcranial direct current stimulation in mild cognitive impairment: Behavioral effects and neural mechanisms.
Introduction: The long preclinical phase of Alzheimer's disease provides opportunities for potential disease-modifying interventions in prodromal stages such as mild cognitive impairment (MCI). Anodal transcranial direct current stimulation (anodal-tDCS), with its potential to enhance neuroplasticity, may allow improving cognition in MCI.
Methods: In a double-blind, cross-over, sham-controlled study, anodal-tDCS was administered to the left inferior frontal cortex during task-related and resting-state functional magnetic resonance imaging (fMRI) to assess its impact on cognition and brain functions in MCI.
Results: During sham stimulation, MCI patients produced fewer correct semantic-word-retrieval responses than matched healthy controls, which was associated with hyperactivity in bilateral prefrontal regions. Anodal-tDCS significantly improved performance to the level of controls, reduc…
matched on Cognitive Dysfunction (mesh), mild cognitive impairment (text)
Promoting Sleep Oscillations and Their Functional Coupling by Transcranial Stimulation Enhances Memory Consolidation in Mild Cognitive Impairment.
Alzheimer's disease (AD) not only involves loss of memory functions, but also prominent deterioration of sleep physiology, which is already evident at the stage of mild cognitive impairment (MCI). Cortical slow oscillations (SO; 0.5-1 Hz) and thalamocortical spindle activity (12-15 Hz) during sleep, and their temporal coordination, are considered critical for memory formation. We investigated the potential of slow oscillatory transcranial direct current stimulation (so-tDCS), applied during a daytime nap in a sleep-state-dependent manner, to modulate these activity patterns and sleep-related memory consolidation in nine male and seven female human patients with MCI. Stimulation significantly increased overall SO and spindle power, amplified spindle power during SO up-phases, and led to stronger synchronization between SO and spindle power fluctuations in EEG recordings. Moreover, visual …
matched on Cognitive Dysfunction (mesh), Memory Disorders (mesh), mild cognitive impairment (text)