Modifiable lifestyle factors and cognitive reserve: A systematic review of current evidence

This systematic review aims to summarize cognitive reserve (CR) evaluation approaches and to examine the role of seven selected modifiable lifestyle factors (diet, smoking, alcohol consumption, physical activity, cognitive leisure activity, sleep, and meditation) in mitigating the impacts of age- or disease-related brain changes on cognition. Eighteen population-based English empirical studies were included. We summarize the study designs and identify three CR models that were broadly used in these studies, including a residual model assessing lifestyle factors in relation to unexplained variance in cognition after accounting for brain markers, a moderation model testing whether lifestyle factors moderate the relationship between brain status and cognition, and a controlling model examining the associations between lifestyle factors and cognition when controlling for brain measures. We also present the findings for the impact of each lifestyle factor. No studies examined diet, sleep, or meditation, and only two studies focused on smoking and alcohol consumption each. Overall, the studies suggest lifestyle activity factors (physical and cognitive leisure activities) may contribute to CR and attenuate the damaging impact of brain changes on cognition. Standardized measurements of lifestyle factors and CR are needed, and mechanisms underlying CR need to be further addressed as well.     

Memory related molecular signatures: The pivots for memory consolidation and Alzheimer's related memory decline

Age-related cognitive decline is the major cause of concern due to its 70% more incidence than dementia cases worldwide. Moreover, aging is also the major risk factor of Alzheimer's disease (AD), associated with progressive memory loss. Approx. 13 million people will have Alzheimer-related memory decline by 2050. Learning and memory is the fundamental process of brain functions. However, the mechanism for the same is still under investigation. Thus, it is critical to understand the process of memory consolidation in the brain and extrapolate its understanding to the memory decline mechanism. Research on learning and memory has identified several molecular signatures such as Protein kinase M zeta (PKMζ), Calcium/calmodulin-dependent protein kinase II (CaMKII), Brain-derived neurotrophic factor (BDNF), cAMP-response element binding protein (CREB) and Activity-regulated cytoskeleton-associated protein (Arc) crucial for the maintenance and stabilization of long-term memory in the brain. Interestingly, memory decline in AD has also been linked to the abnormality in expressing these memory-related molecular signatures. Hence, in the present consolidated review, we explored the role of these memory-related molecular signatures in long-term memory consolidation. Additionally, the effect of amyloid-beta toxicity on these molecular signatures is discussed in detail.     

广泛性焦虑障碍住院患者与健康对照者的认知功能比较研究

背景 广泛性焦虑障碍（GAD）是常见的慢性精神疾病，常伴有不同程度的认知功能损害，严重影响患者的生活质量及社会功能。 目的 比较GAD住院患者与健康对照者认知功能的差异。 方法 选取2018年8月至2020年1月在南方医科大学南方医院住院治疗的GAD患者为GAD组（n=30），同期通过广告在南方医科大学南方医院住院患者陪护人员中招募年龄、性别相匹配的健康志愿者为健康对照组（n=30）。使用汉密尔顿焦虑量表（HAMA）、汉密尔顿抑郁量表（HAMD）和Beck自杀意念量表中文版（BSI-CV）进行心理测评，采用精神运动警觉性任务（PVT）、Go/No-go联想任务、N-back任务分别评估认知功能的注意、抑制及工作记忆功能。比较两组一般情况、量表测评总分及认知功能差异，进一步采用多因素Logistic回归分析探究GAD住院患者和健康对照者的认知功能差异。 结果 GAD组HAMA、HAMD总分和最严重情况时BSI-CV总分及最严重情况时存在自杀意念者所占比例高于健康对照组（P<0.05）。N-back任务：GAD组1-back击中目标率（NBACK1a）、2-back击中目标率（NBACK2a）低于健康对照组，1-back击中目标的平均反应时（NBACK1b）长于健康对照组（P<0.05）。多因素Logistic回归分析结果显示，NBACK1a〔OR=0.946，95%CI（0.898，0.997），P=0.038〕、NBACK1b〔OR=1.007，95%CI（1.000，1.014），P=0.042〕是GAD的影响因素。 结论 与健康对照者相比，GAD住院患者的工作记忆较差，需要临床关注。     

Implementation of Nurse-Led Cognitive Screening During Medicare Annual Wellness Visits

Dementia is a serious and costly illness. Early identification of cognitive impairment provides opportunity for earlier intervention, and there is growing evidence suggesting that early intervention may help delay the onset of dementia. There is limited concensus and standardized recommendations for when and how cognitive screening should occur. This quality improvement project implemented a standardized nurse-led cognitive screening workflow during the Medicare annual wellness visit. Statistically significant differences were found between the baseline and implementation groups for Mini-Cog screening rates and referral for follow-up for further neurocognitive evaluation. A structured nurse-led workflow improved the cognitive screening process, providing opportunity for further evaluation and intervention.     

认知重构干预对急性心肌梗死介入手术患者不良情绪及疾病感知的影响

目的探讨认知重构干预对急性心肌梗死(AMI)介入手术患者不良情绪及疾病感知的影响。方法72例AMI介入手术患者随机分为两组各36例,对照组给予常规护理干预,研究组在对照组基础上给予认知重构干预,比较两组的不良情绪、疾病感知以及治疗依从性。结果干预后,研究组的HAMA、HAMD评分均低于对照组,疾病感知各项评分均高于对照组(P<0.05)。研究组的治疗依从性为94.44%,高于对照组的75.00%(P<0.05)。结论认知重构干预对急性心肌梗死介入手术患者的不良情绪及疾病感知均有积极的影响,可提升患者的治疗依从性。     

卒中后认知障碍与软脑膜侧支循环的代偿程度及静脉溶栓治疗的相关性分析

目的：比较急性缺血性卒中患者卒中后认知障碍的发生与软脑膜侧支循环的代偿程度及是否接受静脉溶栓治疗的相关性。方法：前瞻性收集2019年1月至2021年3月在石河子市人民医院住院的急性前循环脑梗死患者161例，获取患者入院时人口学资料，包括是否溶栓、性别、合并症等；通过蒙特利尔认知评估量表（Montreal cognitive assessment,MoCA）评分、简易精神状态检查量表（mini mental state examination,MMSE）评分评估患者认知功能；入院时美国国立卫生院卒中量表（National Institute of Health Stroke Scale,NIHSS）评分获取患者神经功能缺损症状；通过Blessed行为量表（Blessed behavior scale,BBS）评分评估患者的日常生活能力；通过区域软脑膜评分（regional leptomeningeal collateral score,rLMC）获取患者软脑膜侧支循环；根据卒中后6个月是否合并认知障碍分为认知障碍组和非认知障碍组，采用logistic多因素回归方法进行统计比较，分析2组患...     

端粒长度与认知障碍及其中药治疗的研究现况

认知障碍是指记忆、语言、理解和判断等一个或多个方面的功能障碍,包括轻度认知障碍和各种类型的痴呆症。痴呆症是认知障碍最严重的表现,是一种导致患者日常生活、社会交往和工作能力发生显著变化的综合征。阿尔茨海默病(AD)是最常见的痴呆症类型,其次是血管性痴呆(VD)和其他神经退行性痴呆[1]。已知年龄与认知功能的退化密切相关。     

Social cognitive correlates of device-measured and self-reported physical activity in Black and White individuals with multiple sclerosis

BackgroundThere is increasing research interest regarding physical activity behavior among persons with multiple sclerosis (MS), yet there is little known about physical activity and its correlates in Black persons with MS.ObjectiveThis cross-sectional study assessed associations among social cognitive theory (SCT) variables and device-measured and self-reported physical activity in samples of Black and White persons with MS.MethodsParticipants included 67 Black and 141 White persons with MS who wore an ActiGraph accelerometer on a belt around the waist measuring moderate-to-vigorous physical activity (MVPA) for seven days and completed a battery of questionnaires. Questionnaires included demographic and clinical characteristics, leisure-time exercise, exercise self-efficacy, overcoming barriers self-efficacy, function, social support, exercise outcome expectations, and goal setting and planning.ResultsBlack participants with MS engaged in significantly less MVPA, but not sedentary behavior or light physical activity, than the White participants with MS. Black participants further had significantly lower levels of exercise self-efficacy and outcome expectations than the White sample. All SCT correlates were significantly correlated with self-reported physical activity, but only exercise and barriers self-efficacy, perceived function, and exercise goal setting were associated with device-measured MVPA. The difference in physical activity between Black and White participants with MS was accounted for by differences in exercise self-efficacy and outcome expectations.ConclusionsResearchers should consider developing behavioral interventions that target exercise self-efficacy and outcome expectations as SCT variables for increasing physical activity in Black persons with MS.     

我国老年人认知水平变化轨迹及其分化

目的 探究影响我国老年人认知水平的变化趋势，分离出年龄、队列效应。方法 基于CLHLS（2002—2018）多重队列追踪数据，以Stata16.0软件为工具，运用分层生长曲线模型进行统计分析。结果 本研究发现，个体行为生活方式、社会经济地位、性别、慢性病数量对认知水平均具有统计学意义；年龄、队列对认知水平的变化具有独立效应；随着年龄的增长，我国老年人认知水平下降，认知水平的城乡、性别差异明显；较年轻出生队列的老年人认知水平较好，认知水平的城乡差异随着队列的年轻化而变大，性别差异在较年轻队列有略微缩小的趋势。结论 影响认知水平因素复杂，认知障碍会增加医疗成本及照护负担，因此需准确把握老年认知水平的变化规律与作用路径，从而为卫生服务、养老保障、长期医疗照护的资源配置提供科学依据。