高原运动对认知功能的影响

高原地区低压低氧的环境特点,会给机体生理功能带来挑战,对认知表现产生影响。有氧运动能够增加神经可塑性,改善认知功能,但能否适用于高原环境,受认知任务类型、海拔高度、运动强度和暴露类型等因素的调节。目前用于解释高原运动影响认知表现涉及的因素包括:脑氧合、神经营养因子、氧化应激与神经免疫。未来研究应关注不同运动类型和运动强度对高原移、世居人群的影响,并采用神经生理手段进一步探究高原运动对认知功能的影响机制,为开具“高原运动处方”提供依据。     

有氧运动对记忆的影响及其神经生物学机制

有氧运动是氧气充足时运用大型肌肉群进行有节奏的持续运动。有氧运动可以加快工作记忆任务中的反应速度; 在记忆编码前和记忆巩固阶段进行高强度有氧运动有助于提升情景记忆; 高强度有氧运动可以促进内隐记忆。有氧运动可以促进神经营养因子的产生, 引起长时程增强, 激活海马等与记忆相关的脑区并促进神经元再生。未来可探究有氧运动开始和持续时间的影响、有氧运动强度和认知参与的影响、有氧运动对不同年龄性别群体的影响以及脑源性神经营养因子的中介作用, 从而深入揭示有氧运动对记忆的影响及其神经生物学机制。     

不同强度短时有氧运动对执行功能的影响

探讨短时有氧运动对执行功能的影响是否与运动强度和性别有关, 为从运动强度和性别角度选择合理的有氧运动干预方案改善执行功能提供基础。研究采用混合设计, 选取30名大学生(男女人数各半), 使用功率自行车实施30分钟的不同强度有氧运动, 使用Flanker任务、2-back任务和数字More-odd shifting任务分别测查被试基线、小强度短时有氧运动、中强度短时有氧运动和大强度短时有氧运动后执行功能的抑制、刷新和转换三个子功能的变化, 结果表明：不同强度的短时有氧运动对执行功能产生选择性的积极影响, 且不随性别变化而改变。     

重复经颅磁刺激对轻度认知障碍的干预效果

轻度认知障碍(mild cognitive impairment, MCI)是介于正常认知老化和老年痴呆的中间状态, 目前尚无有效的药物治疗方案。重复经颅磁刺激(repetitive transcranial magnetic stimulation, rTMS)可通过诱导突触可塑性的改变来改善大脑的认知功能。对rTMS干预MCI认知功能的有效性及神经机制进行分析。未来研究应优化定位手段, 延长对干预效果的随访评估, 考察不同刺激参数和刺激靶区对干预有效性的影响, 以及结合脑成像技术来探索rTMS的干预机制。     

志愿服务对老年人认知功能的改善及神经心理机制

突破传统认知干预将老年人作为被帮助对象,本研究将志愿服务作为一种干预手段,考察老年人作为提供帮助的主体,助人过程中涉及的认知活动、身体活动、社会活动反过来对其自身认知功能的影响及作用机制。研究将采用随机对照实验、功能磁共振成像和数据建模技术,从冷热双系统的角度系统探讨志愿服务干预老年人认知功能的神经心理机制,并构建预测模型,探索不同老年人参与志愿服务改善认知功能的适配模式。研究围绕志愿服务干预老年人认知功能的科学性展开,在发挥老年人主观能动性的同时增加干预的可持续性,为保护老年人认知功能提供一种基于现实设定的干预方式。     

恐音症的临床心理特征及其神经机制

恐音症是一种特殊的情绪性心理障碍,会导致患者对某些日常声音产生负面情绪、生理唤醒和异常行为,并严重影响其身心发展和社会适应。恐音症与强迫症等心身疾病存在症状上的重叠,但其在脑岛、眶额皮层、运动皮层上却表现出神经特征的独特性。进一步的脑成像显示,恐音症在视听皮层、边缘系统、自主神经系统、脑岛、运动皮层间存在异常功能连接。强烈世界理论和过度镜像模型为恐音症在注意系统、感知系统、情绪系统、感知-动作联结系统等异常方面提供了其临床心理及神经机制的解释。在此基础上,通过区分单通道干预和跨通道干预方案,从修正认知、重塑神经活跃程度、改善脑区间功能连接等角度,为完善和建构恐音症治疗方案提供新思路。     

手势认知功能研究的新视角：“空间化”手势假设

人类在说话或思考的时候常常伴随着手势。手势是在认知加工或交流过程中自动产生的,具有表征性,同时,手势能够影响人类的认知加工。尽管研究者对手势的概念界定各有侧重,但普遍认为手势不同于直接行动,具有认知功能。手势认知功能的代表性理论模型有词汇索引模型、信息打包假设、表象保持理论、语义特殊性假设和嵌入/延展观。根据手势认知功能研究中主要自变量的不同,可以把手势认知功能分成三种不同的研究范式,即允许-限制手势的研究范式、侧重手势模式改变的研究范式、侧重情境改变的研究范式。今后值得关注的研究方向除了深入探讨手势认知功能的神经机制、加强对手势认知功能的干预研究外,提出了建立更具解释力的手势认知功能的理论模型——"空间化"手势假设。     

智商常态人群的智力个体差异研究述评

智力功能个体差异星正态分布有不同观点：g因素决定特殊能力分化程度差异论、因素搭配差异论;单一认知机能、认知机能系统中的一个或者几个认知机能缺陷影响智力功能差异论;认知发展理论的要素功能大小和要素关联关系强弱、结构差异论;文化活动结构差异和遗传进化的神经效率差异论;神经活动特性水平和神经活动区域效率差异、人格中介情景任务和人     

手势认知功能研究的新视角：“空间化”手势假设

人类在说话或思考的时候常常伴随着手势。手势是在认知加工或交流过程中自动产生的, 具有表征性, 同时, 手势能够影响人类的认知加工。尽管研究者对手势的概念界定各有侧重, 但普遍认为手势不同于直接行动, 具有认知功能。手势认知功能的代表性理论模型有词汇索引模型、信息打包假设、表象保持理论、语义特殊性假设和嵌入/延展观。根据手势认知功能研究中主要自变量的不同, 可以把手势认知功能分成三种不同的研究范式, 即允许-限制手势的研究范式、侧重手势模式改变的研究范式、侧重情境改变的研究范式。今后值得关注的研究方向除了深入探讨手势认知功能的神经机制、加强对手势认知功能的干预研究外, 提出了建立更具解释力的手势认知功能的理论模型——“空间化”手势假设。     

急性应激影响工作记忆的生理心理机制

急性应激是机体面对外界环境变化所产生的一系列生理和心理反应, 对认知加工, 尤其是核心的工作记忆能力产生深远影响, 然而以往的研究存在大量不一致的结果。从应激诱发方式、工作记忆加工子成分、个体差异等三个方面系统阐释应激影响工作记忆的生理心理机制, 并结合认知神经机制的框架, 可以更好地理解以往的结果。未来研究应综合考虑应激诱发、认知任务和响应个体等方面的差异对应激带来的影响, 并关注急性应激负面影响的干预与调控。     

Electroencephalographic evidence for improved visual working memory performance during standing and exercise

While a substantial body of research has investigated the effects of aerobic exercise on cognitive performance, few have monitored exercise‐concurrent cognitive processes via electroencephalography and fewer still using an event‐related potential (ERP) approach. As such, little is known regarding how the temporal dynamics of cognitive processing are influenced during aerobic activity. Here, we aimed to elucidate the influence of aerobic exercise on the temporal dynamics of concurrent visual working memory (VWM) performance. Participants performed a VWM retro‐cue task at rest and during aerobic exercise across two postural modalities: seated (using a stationary bicycle) and standing upright (using a treadmill). Three consecutive phases of the VWM processing pipeline were assessed by means of lateralized ERPs: access of VWM representations, response selection, and response execution. Aerobic exercise and upright posture were found to have significant effects on VWM performance, facilitating processing speed in the retro‐cue task. This facilitation arose primarily at an intermediary stage between the phases of accessing VWM representations and response selection. Our findings hold implications not only for understanding the influence of aerobic activity on VWM, but also for contemporary models of VWM that are built exclusively on data recorded during stationary, seated conditions.     

Effects of acute bouts of exercise on cognition

A review was conducted of studies that assessed the effects of acute bouts of physical activity on adults' cognitive performance. Three groups of studies were constituted on the basis of the type of exercise protocol employed. Each group was then evaluated in terms of information-processing theory. It was concluded that submaximal aerobic exercise performed for periods up to 60 min facilitate specific aspects of information processing; however, extended exercise that leads to dehydration compromises both information processing and memory functions. The selective effects of exercise on cognitive performance are explained in terms of Sanders' [Acta Psychol. 53 (1983) 61] cognitive-energetic model.     

Neuropsychological and neurophysiological effects of strengthening exercise for early dementia: A pilot study

ABSTRACT

Research demonstrates a positive effect of aerobic exercise on cognitive functioning in older adults. Unfortunately, aerobic exercise is often contraindicated for older adults due to cardiovascular and functional limitations. Low-intensity strengthening exercise may offer a practical alternative, but the neuropsychological benefits and potential neurophysiological mechanisms are less well understood. The current study evaluated the effects of a 10-week strengthening exercise intervention on cognitive functioning and EEG in a sample of 13 older adults with early dementia, and 9 normative controls. Results revealed beneficial effects of strengthening exercise on verbal memory coupled with frontal beta and delta power asymmetries and N200 amplitude asymmetry. Results point to increased cognitive efficiency following 10 weeks of strengthening exercise. The findings suggest it is feasible to conduct a strengthening intervention with early dementia patients, and to gather neuropsychological and neurophysiological data to evaluate outcomes. Strengthening exercise may serve as a useful alternative to aerobic exercise.     

Decline in executive control during acute bouts of exercise as a function of exercise intensity and fitness level

Studies on the effects of acute bouts of cardiovascular exercise on cognitive performances show contradictory findings due to methodological differences (e.g., exercise intensity, cognitive function assessed, participants’ aerobic fitness level, etc.). The present study assessed the acute effect of exercise intensity on cognition while controlling for key methodological confounds. Thirty-seven participants (M_age = 23. 8 years; SD = 2.6) completed a computerized modified-Stroop task (involving denomination, inhibition and switching conditions) while pedalling at 40%, 60% and 80% of their peak power output (PPO). Results showed that in the switching condition of the task, error rates increased as a function of exercise intensity (from 60% to 80% of PPO) in all participants and that lower fit individuals showed increased reaction time variability. This suggests that acute bouts of cardiovascular exercise can momentarily alter executive control and increase performance instability in lower fit individuals.     

Effect of acute aerobic exercise on cognitive performance: Role of cardiovascular fitness

ObjectivesTo determine whether fitness and cognitive task type moderate the relationship between acute exercise and cognition.MethodsThirty-six healthy college-aged adults completed a maximal graded exercise test and were categorized as low, moderate, or high in cardiovascular fitness. Participants then performed the Stroop Test prior to and after an acute bout of cycling exercise that consisted of a 5-min warm-up, 20 min of exercise at moderate intensity (65% VO_2max), and a 5-min cool-down.ResultsIndividuals of all fitness levels improved in cognitive performance following exercise. With regards to fitness, while no differences were observed on the congruent condition as a function of fitness, high fit individuals showed the longest response time on the Stroop incongruent condition.ConclusionThe beneficial relationship between performance of an acute bout of exercise and cognitive performance were observed for both cognitive task types and for participants of all fitness levels. However, a curvilinear relationship was observed between fitness and cognitive task type performance such that participants who were moderately fit performed the best on the incongruent trials, implying that maintaining fitness at a moderate level is associated with better executive function.     

才思泉涌“举步”间：体育运动对创造性思维的影响

创造性思维是运用独特且新颖的观点解决问题的思维形式,发散与聚合思维是两种常见的类型。体育运动对发散与聚合思维具有不同的影响,且受到运动强度、方式、时长以及个体差异等因素的调节。目前解释体育运动如何影响创造性思维的理论有情绪假说、执行功能假说与身心隐喻理论。未来的研究需要在进一步重视研究规范性的基础上,加强神经科学研究并拓宽群体覆盖面,关注体育运动与创造性成就的关系,为开具创造性思维运动处方提供有力的科学支持。     

Protective effect of aerobic fitness on the detrimental influence of exhaustive exercise on information processing capacity

Although aerobic fitness has been thought to protect against the detrimental cognitive effects following exhaustive exercise, available evidence from studies using traditional mean behavioral measures remain somewhat equivocal.PurposeThis study aimed to reconcile this discrepancy by using a novel theory-driven diagnostic tool, the Systems Factorial Technology (SFT).MethodsSixty-six healthy young adults aged from 18 to 30 years old with different levels of aerobic fitness (n = 33 for the higher-fit and lower-fit groups) completed a go/nogo version of redundant-target task before and after a graded exercise test (GXT) until exhaustion. SFT was used to calculate the resilience capacity, which reflects the information processing capacity underlying inhibitory control.ResultsFollowing the GXT, both higher-fit and lower-fit groups showed faster responses while leaving accuracy unchanged as compared to the performance at the pretest. On the other hand, the resilience capacity decreased for the lower-fit group but was maintained for the higher-fit group.ConclusionThe present findings suggest that aerobic fitness may modulate the individual difference in decisional mechanism following exhaustive exercise. In sum, this study offers an alternative mechanistic explanation regarding cognitive individual differences in response to exhaustive exercise and provides novel insights into the significance of maintaining a state of high physical fitness for those who need to perform cognitively challenging tasks under physically stressful conditions (e.g., elite athletes).     

Improving aerobic capacity in healthy older adults does not necessarily lead to improved cognitive performance

The effects of aerobic exercise training in a sample of 85 older adults were investigated. Ss were assigned randomly to either an aerobic exercise group, a nonaerobic exercise (yoga) group, or a waiting-list control group. Following 16 weeks of the group-specific protocol, all of the older Ss received 16 weeks of aerobic exercise training. The older adults demonstrated a significant increase in aerobic capacity (cardiorespiratory fitness). Performance on reaction-time tests of attention and memory retrieval was slower for the older adults than for a comparison group of 24 young adults, and there was no improvement in the older adults' performance on these tests as a function of aerobic exercise training. Results suggest that exercise-related changes in older adults' cognitive performance are due either to extended periods of training or to cohort differences between physically active and sedentary individuals.