The Impact of Motor Activity and Inactivity on the Brain: Implications for the Prevention and Treatment of Nervous- System Disorders

ABSTRACT— Since Donald Hebb's pioneering observations in the 1940s, much research has focused on the effects of variations in physical activity and environmental complexity on behavioral performance and brain structure. Beneficial effects on brain health have been linked to physical fitness, skilled training, and exposure to complex environments, though in rodents these effects may be negated by sudden changes in social structure. Such manipulations can alleviate the deficits associated with several nervous-system disorders and aging. But how increased activity produces its beneficial effects is still not fully understood. How does unskilled physical activity (e.g., repetitive exercise) compare to training in skilled activities or exposure to complex environments? In injury states, is task-specific training a better rehabilitative strategy than general exercise? How do changes in motor activity affect specific brain regions, and can the intensity and timing of therapeutic movement be adjusted to produce optimal outcomes? Are the beneficial effects of motor enrichment banked over periods of inactivity and can they be called upon with booster training to treat a later neurological disorder? Are there circumstances in which increased activity is harmful? Enrichment of physical activity shows promise as an easy and healthful means for improving or restoring brain function, and questions like these are now being investigated so that the full potential of increased activity may be harnessed.     

Multilingual assessment of early child development: Analyses from repeated observations of children in Kenya

In many low‐ and middle‐income countries, young children learn a mother tongue or indigenous language at home before entering the formal education system where they will need to understand and speak a country's official language(s). Thus, assessments of children before school age, conducted in a nation's official language, may not fully reflect a child's development, underscoring the importance of test translation and adaptation. To examine differences in vocabulary development by language of assessment, we adapted and validated instruments to measure developmental outcomes, including expressive and receptive vocabulary. We assessed 505 2‐to‐6‐year‐old children in rural communities in Western Kenya with comparable vocabulary tests in three languages: Luo (the local language or mother tongue), Swahili, and English (official languages) at two time points, 5–6 weeks apart, between September 2015 and October 2016. Younger children responded to the expressive vocabulary measure exclusively in Luo (44%–59% of 2‐to‐4‐year‐olds) much more frequently than did older children (20%–21% of 5‐to‐6‐year‐olds). Baseline receptive vocabulary scores in Luo (β = 0.26, SE = 0.05, p < 0.001) and Swahili (β = 0.10, SE = 0.05, p = 0.032) were strongly associated with receptive vocabulary in English at follow‐up, even after controlling for English vocabulary at baseline. Parental Luo literacy at baseline (β = 0.11, SE = 0.05, p = 0.045) was associated with child English vocabulary at follow‐up, while parental English literacy at baseline was not. Our findings suggest that multilingual testing is essential to understanding the developmental environment and cognitive growth of multilingual children.     

Assessing human reorientation ability inside virtual reality environments: the effects of retention interval and landmark characteristics

The purpose of the present study was to assess the navigational behaviour of adult humans following a disorientation procedure that perturbed their egocentric frame of reference. The assessment was carried out in a virtual reality (VR) environment by manipulating the disorientation procedure, the retention interval, the relative positions of target and landmark. The results of experiment I demonstrated that adding a physical rotation to a virtual disorientation procedure did not yield an additional decrease in searching performance. The results of experiment II showed that shortening the delay between study and test phase decreased the errors more markedly for geometric than landmark ones. An orientation specificity effect due to the manipulation of the relative position between target and landmark was discussed across the experiments. In conclusion, VR seemed to be a valuable method for studying human reorientation. Moreover, the virtual experimental setting involved here promoted knowledge of the relationship between working memory and spatial reorientation paradigm.     

A factor analysis for identifying people with disabilities’ mobility issues in built environments

Neighborhood built environments (BE) have been recognized as an important aspect that can, directly and indirectly, impact people with disabilities’ mobility. While many efforts have been made to improve the quality of BE, people with disabilities still perceive inequality in BE. The objective of this study is to identify the factors influencing people with disabilities’ attitudes toward BE that can facilitate or suppress their mobility, using exploratory factor analysis. This study specifically focuses on people with physical disabilities and people with visual impairments living in Austin, TX and Houston, TX metropolitan areas in USA. Data was gathered through an online survey. This study identified three factors from the sample: 1) barrier-free BE; 2) BE supporting safe travel; and 3) walkable BE. In addition, the factors were compared according to the respondents’ demographic information, such as income level, disability type, and private car use availability in households. Regarding income level, low-income individuals with disabilities perceived BE more negatively than their counterparts did. As for private car availability, people with disabilities who have no car in their households had a more negative perception of BE. However, no differences were found in the attitudes across disability types. This study contributes to understanding what BE factors are important for people with disabilities. The findings suggest the importance of establishing more targeted and prioritized strategies, considering people with disabilities’ neighborhoods and individual characteristics, for the improvement of their mobility.     

Stepping Into a Map: Initial Heading Direction Influences Spatial Memory Flexibility

Learning a novel environment involves integrating first‐person perceptual and motoric experiences with developing knowledge about the overall structure of the surroundings. The present experiments provide insights into the parallel development of these egocentric and allocentric memories by intentionally conflicting body‐ and world‐centered frames of reference during learning, and measuring outcomes via online and offline measures. Results of two experiments demonstrate faster learning and increased memory flexibility following route perspective reading (Experiment 1) and virtual navigation (Experiment 2) when participants begin exploring the environment on a northward (vs. any other direction) allocentric heading. We suggest that learning advantages due to aligning body‐centered (left/right/forward/back) with world‐centered (NSEW) reference frames are indicative of three features of spatial memory development and representation. First, memories for egocentric and allocentric information develop in parallel during novel environment learning. Second, cognitive maps have a preferred orientation relative to world‐centered coordinates. Finally, this preferred orientation corresponds to traditional orientation of physical maps (i.e., north is upward), suggesting strong associations between daily perceptual and motor experiences and the manner in which we preferentially represent spatial knowledge.     

恢复性环境研究:理论、方法与进展

近十年来,"恢复性环境"成为环境心理学研究的热点。目前,从恢复结果的角度,注意恢复理论和心理进化理论认为,恢复性环境是指有助于人们更好地从心理疲劳以及和压力相伴随的消极情绪、生理反应中恢复过来的环境。对该环境的研究主要采用量表法和实验法,研究结果涉及恢复结果、影响恢复的因素、恢复和偏好的关系、恢复性环境的眼动特征以及临床应用。今后应该更侧重对恢复性环境理论和研究设计的进一步完善、量表的效度验证,并加强研究成果的具体应用。     

Women's Mental Health Issues

No abstract available for this article.     

Entropy,Visual Diversity,and Preference

The author reports relationships between subjective impressions of visual diversity or pleasure with statistical entropies of stimuli. The stimuli were 34 rows of houses that varied in color, scale, and shape, or in shape and articulation. Entropies ranged from 0.0 to 5.6 bits. Fifty-seven participants rated the stimuli on scales of pleasant/unpleasant and uniform/diverse. The relationship between rated diversity and entropy was strong and linear. The relationship between rated pleasure and entropy was either linear or asymptotic, but no evidence was found for an inverted U relationship.     

Mental Health and Personality Functioning of Naval Specialists Working in Extreme Environments

This study aimed to describe the mental health profile of South African Navy specialists working in extreme environments and to investigate the incidence of expressed psychopathology among them. The authors used the Minnesota Multiphasic Personality Inventory (MMPI)-2 to describe major patterns of psychopathology and abnormal personality functioning in a sample of 161 divers and 152 submariners and compared them with a sample of 139 general Navy employees. Navy divers and submariners displayed desirable mental health profiles, although occupational-specific markers of atypical behavior patterns were found, such as slightly elevated scores on the Hypomania scale among divers and on the Responsibility scale among submariners. There was a strong expression of masculine gender role identification among divers and submariners and the general Navy. In the cases in which atypical behavior dynamics occurred, it could be interpreted as adaptive rather than psychopathological in the specific context of the operational environment in which those individuals operated. Practically, this study provides contemporary MMPI-2 profiles and the accompanying occupational-related normative deviations for South African divers and submariners, possibly allowing for more accurate interpretation of profiles from these groups, resulting in enhanced mental health monitoring in these environments.     

FORGIVENESS,COMMEMORATION, AND RESTORATIVE JUSTICE: THE ROLE OF MORAL EMOTIONS

Abstract: Forgiveness of wrongdoing in response to public apology and amends making seems, on the face of it, to leave little room for the continued commemoration of wrongdoing. This rests on a misunderstanding of forgiveness, however, and we can explain why there need be no incompatibility between them. To do this, I emphasize the role of what I call nonangry negative moral emotions in constituting memories of wrongdoing. Memories so constituted can persist after forgiveness and have important moral functions, and commemorations can elicit these emotions to preserve memories of this sort. Moreover, commemorations can be a restorative justice practice that promotes reconciliation, but only on condition that the memories they preserve are constituted by nonangry negative, not retributive, emotions.