July 01, 2016

new journal - American journal of Alzheimer’s disease and other dementias




June 2016; 31 (4)

Acetylcholinesterase Inhibitors for Delirium in Older Adults

Abstract

Objectives: The aim of this systematic review is to identify published randomized controlled trials (RCTs) that evaluated the use of acetylcholinesterase inhibitors for delirium in older adults (≥60 years).

Methods: A literature search was conducted of PubMed, MEDLINE, EMBASE, PsycINFO, and Cochrane collaboration databases for RCTs in any language that evaluated the use of acetylcholinesterase inhibitors for delirium in older adults (≥60 years). Also, bibliographic databases of the published articles were searched for additional studies.

Conclusion: Current evidence does not suggest efficacy of acetylcholinesterase inhibitors for the prevention or management of delirium in older adults.

 

Challenges With Manual-Based Multimodal Psychotherapy for People With Alzheimer’s Disease

A Case Study

Abstract

Earlier detection of dementia requires increased knowledge of how to help people in the early stages of dementia. However, few studies have focused on how psychotherapy should be adapted to improve the outcome of therapy for people with Alzheimer’s disease. The aims of the present study were to identify and to explore possible obstacles encountered during the use of manual-based psychotherapy for people with early-stage Alzheimer’s disease. The study found that individual adaptations to the treatment manual were necessary, particularly the modification of memory aids in order to adapt them to patients’ functional level and previous experience with modern technology. In addition, caregivers were essential for both treatment and homework completion, while reduced awareness constituted an obstacle for adherence to the manual.

 

Rapidly Versus Slowly Progressing Patients With Alzheimer’s Disease

Differences in Baseline Cognition

Abstract

Rate of progression of cognitive deficits is variable among patients with Alzheimer’s disease (AD). The purpose of the current study was to compare demographic characteristics and performance on neuropsychological measures at baseline evaluation between rapidly and slowly progressing patients. Participants were divided into 2 groups based on change in Alzheimer’s Disease Assessment Scale-Cognitive subscale score from baseline to 2-year follow-up, and baseline performance was compared between the groups. Participants were 55 rapidly progressing and 55 slowly progressing patients with probable AD who had a follow-up evaluation 21 to 27 months after the baseline evaluation. The groups differed in age and initial Clinical Dementia Rating. Performance differed significantly between the groups on Verbal Series Attention Test time, Logical Memory I, Visual Reproduction I, Block Design, and Controlled Oral Word Association Test. Differences were found between rapidly and slowly progressing patients on baseline neuropsychological testing

 

Neuropsychological and Neuroanatomical Correlates of the Social Norms Questionnaire in Frontotemporal Dementia Versus Alzheimer’s Disease

Abstract

Traditional neuropsychological batteries may not distinguish early behavioral variant frontotemporal dementia (bvFTD) from Alzheimer’s disease (AD) without the inclusion of a social behavioral measure. We compared 33 participants, 15 bvFTD, and 18 matched patients with early-onset AD (eAD), on the Social Norms Questionnaire (SNQ), neuropsychological tests and 3-dimensional T1-weighted magnetic resonance imaging (MRI). The analyses included correlations of SNQ results (total score, overendorsement or “overadhere” errors, and violations or “break” errors) with neuropsychological results and tensor-based morphometry regions of interest. Patients with BvFTD had significantly lower SNQ total scores and higher overadhere errors than patients with eAD. On neuropsychological measures, the SNQ total scores correlated significantly with semantic knowledge and the overadhere subscores with executive dysfunction. On MRI analysis, the break subscores significantly correlated with lower volume of lateral anterior temporal lobes (aTL). The results also suggest that endorsement of social norm violations corresponds to the role of the right aTL in social semantic knowledge.

 

Cerebral Glucose Metabolism Assessment in Rat Models of Alzheimer’s Disease

An 18F-FDG-PET Study

Abstract

Objective: This study was designed to detect the brain glucose metabolism in rat models of Alzheimer’s disease (AD) by the application of 18F-2-fluoro-deoxy-d-glucose positron emission tomography (18F-FDG-PET) and to provide new insights for the early detection of AD.

Methods: Forty Wistar rats were randomly divided into 2 groups. Fifteen sham-operated rats were used as a control group. The remaining rats as a premodel group were intracerebroventricularly injected with ibotenic acid and were intraperitoneally injected with d-galactose, of which 15 rats were included as the experimental group. The above-mentioned 2 groups were assigned to Y-maze test and underwent 18F-FDG-PET scanning. Positron emission tomography images were processed with SPM 2.0.

Conclusion: Our data indicate that the changed glucose metabolism in cerebral regions in 18F-FDG-PET imaging could be an important predictor for early AD.

 

 

Multisensory Stimulation as an Intervention Strategy for Elderly Patients With Severe Dementia

A Pilot Randomized Controlled Trial

Abstract

The objective of this study was to compare the effect of multisensory stimulation environment (MSSE) and one-to-one activity sessions in the symptomatology of elderly individuals with severe dementia. Thirty-two participants were randomly assigned to the following 3 groups: MSSE, activity, and control group. The MSSE and activity groups participated in two 30-minute weekly sessions over 16 weeks. Pre-, mid-, and posttrial; 8-week follow-up behavior; mood; cognitive status; and dementia severity were registered. Patients in the MSSE group demonstrated a significant improvement in the Neuropsychiatric Inventory and Bedford Alzheimer Nursing Severity Scale scores compared with the activity group. Both MSSE and activity groups showed an improvement during the intervention in the Cohen-Mansfield Agitation Inventory aggressive behavior factor and total score, with no significant differences between groups. The MSSE may have better effects on neuropsychiatric symptoms and dementia severity in comparison with one-to-one activity sessions in patients with severe dementia.

 

 

Deficits in Attention and Visual Processing but not Global Cognition Predict Simulated Driving Errors in Drivers Diagnosed With Mild Alzheimer’s Disease

Abstract

This study sought to predict driving performance of drivers with Alzheimer’s disease (AD) using measures of attention, visual processing, and global cognition. Simulated driving performance of individuals with mild AD (n = 20) was contrasted with performance of a group of healthy controls (n = 21). Performance on measures of global cognitive function and specific tests of attention and visual processing were examined in relation to simulated driving performance. Strong associations were observed between measures of attention, notably the Test of Everyday Attention (sustained attention; r = −.651, P = .002) and the Useful Field of View (r = .563, P = .010), and driving performance among drivers with mild AD. The Visual Object and Space Perception Test–object was significantly correlated with the occurrence of crashes (r = .652, P = .002). Tests of global cognition did not correlate with simulated driving outcomes. The results suggest that professionals exercise caution when extrapolating driving performance based on global cognitive indicators.

 

 

Knowledge and Attitudes in Alzheimer’s Disease in a Cohort of Older African Americans and Caucasians

Abstract

African American participation in Alzheimer’s disease (AD) research studies has been historically low. To determine whether older African Americans and Caucasians had different knowledge or attitudes related to AD, we administered the Alzheimer’s Disease Knowledge Scale (ADKS) to 67 older African Americans and 140 older caucasians in the greater Atlanta area as well as questions targeting locus of control over general health and AD risks. Older African Americans scored slightly lower on ADKS than older caucasians, with race only accounting for 1.57 (95% confidence interval [CI] 0.57-2.61, P < .001) points of difference in a multivariate model. Attitudes toward AD were also similar between the 2 groups but 1 (35.7%) in 3 adults reported control over general health but not AD risks. In addition to enhancing education content in outreach efforts, there is an urgent need to address the perception that future AD risks are beyond one’s own internal control.

 

 

Validation of Neuropsychological Tests to Screen for Dementia in Chinese Patients With Parkinson’s Disease

Abstract

To compare the accuracy of different neuropsychological tests and their combinations for deriving reliable cognitive indices for dementia diagnosis in Parkinson’s disease (PD). One hundred forty consecutive patients with PD were recruited and administrated an extensive battery of neuropsychological tests. Discriminant analysis and receiver–operator characteristic curve were used to evaluate their correct classifications and validity. Patients with PD having dementia (PDD; 23.5%) performed significantly worse in all tests than patients without dementia. Age of onset, disease duration, Hoehn-Yahr grade, Unified Parkinson’s Disease Rating Scale part III scores, and education were associated with dementia in patients with PD. Mini-Mental State Examination (MMSE), Montreal Cognitive Assessment, and Block Design (BD) showed better specificity and sensitivity when used alone, and combined use of MMSE and BD further increased the validity. Our results indicated that the accuracy of MMSE was better in dementia diagnosis of Chinese patients with PD, and combined use of MMSE and BD could further increase the validity of dementia diagnosis.

 

To receive the full text of any article please email nsw.library@alzheimers.org.au

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