Modification of the home environment for the reduction of injuries.
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Accident Prevention↗
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Results for “Environment Design”
Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.
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Home modifications to make older lives easier.
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Activities of Daily Living↗
Law as a tool to facilitate healthier lifestyles and prevent obesity.
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Adolescent↗
What is the prevalence of environmental hazards in the homes of dementia sufferers and are they associated with falls.
OBJECTIVES: To examine the frequency of environmental hazards in the homes and care environments of patients with dementia and their associations with falls. METHOD: Falls were prospectively assessed in 65 dementia patients using carer diaries, and the safety of the environment assessed by an occupational therapist using a home hazard checklist. RESULTS: Hazards were found in 20 (95%) of patients' own homes and 31 (74%) of residential or nursing home environments (care environments). Patients' homes had a mean of 5.4 hazards compared to a mean of 1.8 hazards in care environments, with two or more hazards in 90% of patients' homes and 52% of care environments. Common hazards included low chairs, an absence of grab rails (toilet area), toilets too low and a missing second banister on the stairs. There was no significant association between the number of hazards and the number of falls, although 13 (10%) falls could be attributed to a specific hazard. CONCLUSION: Rigorous assessment of the patient's environment revealed multiple rectifiable risks that were contributory to a significant minority of falls.
Accidental Falls↗
Environmental enrichment slows disease progression in R6/2 Huntington's disease mice.
Huntington's disease is a genetic disorder that causes motor dysfunction, personality changes, dementia, and premature death. There is currently no effective therapy. Several transgenic models of Huntington's disease are available, the most widely used of which is the R6/2 mouse, because of its rapid disease progression. Environmental enrichment alters gene expression in the normal mouse brain, and modulates the course of several neurological disorders. Environmentally enriched mice may actually mimic human disease more accurately. We found that even limited environmental enrichment slows decline in RotaRod performance in R6/2 mice, despite rapid disease progression, whereas in normal littermates, maximal enrichment was required to induce a marked improvement in behavioral tests. Enrichment also delayed the loss of peristriatal cerebral volume in R6/2 brains. These results could provide the basis for a rational approach to ameliorate the effects of Huntington's disease.
Animals↗
Competitive Hebbian learning and the hippocampal place cell system: modeling the interaction of visual and path integration cues.
The hippocampus has long been thought essential for implementing a cognitive map of the environment. However, almost 30 years since place cells were found in rodent hippocampal field CA1, it is still unclear how such an allocentric representation arises from an ego-centrically perceived world. By means of a competitive Hebbian learning rule responsible for coding visual and path integration cues, our model is able to explain the diversity of place cell responses observed in a large set of electrophysiological experiments with a single fixed set of parameters. Experiments included changes observed in place fields due to exploration of a new environment, darkness, retrosplenial cortex inactivation, and removal, rotation, and permutation of landmarks. To code for visual cues for each landmark, we defined two perceptual schemas representing landmark bearing and distance information over a linear array of cells. The information conveyed by the perceptual schemas is further processed through a network of adaptive layers which ultimately modulate the resulting activity of our simulated place cells. In path integration terms, our system is able to dynamically remap a bump of activity coding for the displacement of the animal in relation to an environmental anchor. We hypothesize that path integration information is computed in the rodent posterior parietal cortex and conveyed to the hippocampus where, together with visual information, it modulates place cell activity. The resulting network yields a more direct treatment of partial remapping of place fields than other models. In so doing, it makes new predictions regarding the nature of the interaction between visual and path integration cues during new learning and when the system is challenged with environmental changes.
Animals↗
Environmental enrichment and voluntary exercise massively increase neurogenesis in the adult hippocampus via dissociable pathways.
Environmental enrichment (EE) and voluntary exercise (VEx) have consistently been shown to increase adult hippocampal neurogenesis and improve spatial learning ability. Although it appears that these two manipulations are equivalent in this regard, evidence exists that EE and VEx affect different phases of the neurogenic process in distinct ways. We review the data suggesting that EE increases the likelihood of survival of new cells, whereas VEx increases the level of proliferation of progenitor cells. We then outline the factors that may mediate these relationships. Finally, we provide a model showing that VEx leads to the convergence of key somatic and cerebral factors in the dentate gyrus (DG) to induce cell proliferation. Although insufficient evidence exists to provide a similar model for EE, we suggest that EE-induced cell survival in the DG involves cortical restructuring as a means of promoting survival. We conclude that EE and VEx lead to an increase in overall hippocampal neurogenesis via dissociable pathways, and should therefore, be considered distinct interventions with regard to hippocampal plasticity and associated behaviors.
Animals↗
Managing problem behaviors associated with dementia.
The older adult with dementia who exhibits problem behaviors is likely to be experiencing physical or psychological distress. Both can negatively affect the health, rehabilitation, and quality of life for the older adult. Managing problem behaviors can challenge the skills of the most experienced nurse. Being able to identify the origins of these behaviors can help caregivers respond in a way that will achieve behavioral management and preserve the dignity of the older adult. This article presents some practical measures to assist nurses with minimizing the negative effects of dementia-associated problem behaviors in older adults.
Aged↗
Maintaining your focus in focus groups: avoiding common mistakes.
Focus groups are used frequently in nursing research as a method for collecting qualitative data. However, due to inadequate planning or execution, the results can be of poor quality or even worthless. A well-defined purpose, carefully planned environment, and well trained personnel are discussed as the cornerstones to focus group success. This article sets the stage with a description of a well conducted focus group, then provides examples and a critique of less-than-effective groups. Focus groups can be powerful and effective when their use is appropriate to the study purpose, the environment is non-judgmental and welcoming, and the personnel are skilled.
Education↗
Changes in accessibility and usability in housing: an exploration of the housing adaptation process.
The purpose of a housing adaptation is to enhance daily activities and to improve housing accessibility and usability by removing physical barriers in the home. The aim of this study was to investigate longitudinal changes in housing accessibility among clients receiving grants for housing adaptations. Baseline assessments were administered one month before the housing adaptation, with the first follow-up after two to three months, and the second follow-up after eight to nine months. The Housing Enabler and the Usability in My Home instruments were used to collect data from 131 consecutively enrolled clients living in general housing. Accessibility and usability improved significantly, the number of physical environmental barriers decreased and dependence on mobility devices increased, but at different times along the process. The results indicate the complexity of the housing adaptation process and the need to consider person-environment interactions over time. The methodology seems useful for quality development of assessment, intervention and evaluation processes in housing adaptations performed by occupational therapists.
Activities of Daily Living↗
A pilot study of the activity patterns of five elderly persons after a housing adaptation.
The importance of an accessible home environment for occupational performance has been emphasized in occupational therapy, but knowledge about how accessibility can affect a person's activity patterns is limited. The purpose of this study was to describe the activity patterns of five elderly persons aged between 70 and 84 years and their views about accessibility and usability of their homes before and after a housing adaptation. Two different questionnaires, 'Accessibility in My Home' and the 'Occupational Questionnaire' were used for data collection. Adaptations in the home included: removing thresholds, installing new taps in the bathroom and kitchen and broadening doorways. After the adaptations the five participants reported that they increased their outside activities, reduced naps during the day and slept better at night. The results showed that the participants performed more and new activities when their home environment had become accessible. Activities performed were also perceived as more important after the housing adaptation. There is a need to replicate the study with a larger sample. Further research is needed on the impact of home adaptations on the activity patterns of elderly people.
Acclimatization↗
Evaluation of flushing of a high-selenium backwater channel in the Colorado River.
Concern has been raised that selenium contamination may be adversely affecting endangered fish in the upper Colorado River basin. The objective of the study was to determine if operation of a water control structure (opened in December 1996) that allowed the Colorado River to flow through a channel area at Walter Walker State Wildlife Area (WWSWA) would reduce selenium and other inorganic elements in water, sediment, aquatic invertebrates, and forage fish. Endangered Colorado pikeminnow were collected and muscle plug samples taken for selenium analysis. Selenium concentrations in filtered water were 21.0 microg/L in 1995, 23.5 microg/L in 1996, 2.1 microg/L in 1997, and 2.1 microg/L in 1998. Selenium concentrations in sediment cores and sediment traps were 8.5 microg/g in 1995, 8.2 microg/g in 1996, 4.8 microg/g in 1997, and 1.1 microg/g in 1998. Selenium concentrations in aquatic invertebrates were 27.4 microg/g in 1996, 15.5 microg/g in 1997, and 4.9 microg/g in 1998. Selenium concentrations in forage fish were 27.2 microg/g in 1996, 20.2 microg/g in 1997, and 8.6 microg/g in 1998. Selenium concentrations in muscle plugs of Colorado pikeminnow were 9.8 microg/g in 1995, 9.5 microg/g in 1996, 9.0 microg/g in 1997, and 10.3 microg/g in 1998. Although selenium concentrations in water, sediment, aquatic invertebrates, and forage fish decreased substantially after operation of the water control structure, a corresponding change in Colorado pikeminnow did not seem to occur. Selenium concentrations in muscle plugs decreased with increasing fish total length and weight, did not change between repeat sampling in the same year or recapture in subsequent years, and seemed to be most closely associated with the mean monthly river flow for the March-July period.
Animals↗
Indirect carbon reduction by residential vegetation and planting strategies in Chicago, USA.
Concern about climate change has evoked interest in the potential for urban vegetation to help reduce the levels of atmospheric carbon. This study applied computer simulations to try to quantify the modifying effects of existing vegetation on the indirect reduction of atmospheric carbon for two residential neighborhoods in north-west Chicago. The effects of shading, evapotranspiration, and windspeed reduction were considered and were found to have decreased carbon emissions by 3.2 to 3.9% per year for building types in study block 1 where tree cover was 33%, and -0.2 to 3.8% in block 2 where tree cover was 11%. This resulted in a total annual reduction of carbon emission averaging 158.7 (+/- 12.8) kg per residence in block 1 and 18.1 (+/- 5.4) kg per residence in block 2. Windspeed reduction greatly contributed to the decrease of carbon emission. However, shading increased annual carbon emission from the combined change in heating and cooling energy use due to many trees in the wrong locations, which increase heating energy use during the winter. The increase of carbon emission from shading is somewhat specific to Chicago, due in part to the large amount of clean, nuclear-generated cooling energy and the long heating season. In Chicago, heating energy is required for about eight months from October to May and cooling energy is used for the remaining 4 months from June to September. If fossil fuels had been the primary source for cooling energy and the heating season had been shorter, the shading effects on the reduction of carbon emission would be greater. Planting of large trees close to the west wall of buildings, dense planting on the north, and avoidance of planting on the south are recommended to maximize indirect carbon reduction by residential vegetation, in Chicago and other mid and high-latitude cities with long heating seasons.
Air Pollutants↗
Farmers' involvement in landscape activities: an analysis of the relationship between farm location, farm characteristics and landscape changes in two study areas in Jutland, Denmark.
Farmers are important agents in rural landscape management as they modify landscape elements to suit their needs. The purpose of this study is to investigate if patterns of landscape activities undertaken by farmers are related to certain farm characteristics and if landscape activities vary from one location to another. With this purpose, we investigated the differences between the level of farmers' involvement in landscape activities in two study areas in central Jutland, Denmark. Particular attention was given to the analysis of the type and extent of landscape activities and their relationship with farm characteristics. In both study areas, landscape activities leading to a more extensive type of land use predominate. However, a multivariate analysis implemented on the set of landscape activity data reveals significant differences between the two study areas. Hedgerow planting and removal is more common in Sønder Omme, while pond digging and cultivation of permanent grass lands are characteristic activities in Gadbjerg-Givskud. Moreover, the proportion of farmers involved and the area affected by different landscape activities is larger in Sønder Omme than in Gadbjerg-Givskud. The farms of the two areas are different in terms of production type, size and socio-economic characteristics. These characteristics represent significant relationships with landscape activities. However, they are not sufficient to explain the differences between landscape activities undertaken in the two areas. The differences are caused by unique cultural and biophysical environment, which influence and modify the relationship between farm characteristics and landscape activities in a distinct manner for each study area.
Adult↗
Direct measurement of sun protection in primary schools.
BACKGROUND: "Kidskin" is an intervention study involving children at 33 primary schools in Perth, Western Australia. This study includes measurement of changes in implementation of schools' sun protection policies. This paper reports on measurement of observable aspects of sun protection. METHODS: Hat use was assessed from videos of children in the playground. Shade use was measured using UVR-sensitive polysulfone badges worn by a random sample of children. Shade provision was measured from aerial photographs of the schools. Principals were surveyed about school policies and practices. RESULTS: Eighty-seven percent of children wore a hat during lunch time at school, although only 14% wore the most protective styles of hats. The mean proportion of ambient UVR exposure received by Year 1 children was 15.5%; children spent less time in the sun on sunnier days. On average, 14.5% of the playground was shaded; this was not associated with children's sun exposure. Correlations between these results and the principals' estimates were poor. CONCLUSIONS: Children should be encouraged to wear more protective styles of hats and to avoid sun exposure, even on less sunny days during spring and summer. Principals' estimates of shade provision and children's sun protection behavior at school are of little value.
Analysis of Variance↗
Socioeconomic status differences in recreational physical activity levels and real and perceived access to a supportive physical environment.
BACKGROUND: Spatial access to recreational facilities and perceptions of the neighborhood environment and physical activity levels were examined by the socioeconomic status of area of residence (SES). METHODS: A cross-sectional survey of adults (18-59 years) (n = 1,803) stratified by SES using a geographic-based index was conducted. RESULTS: Respondents in low SES areas had superior spatial access to many recreational facilities, but were less likely to use them compared with those living in high SES areas. They were more likely to perceive that they had access to sidewalks and shops, but also perceived that their neighborhood was busier with traffic, less attractive, and less supportive of walking. After adjustment, respondents living in low SES areas were 36% less likely to undertake vigorous activity. While they were more likely to walk for transport, this was not statistically significant (OR, 1.27; 95% CI, 0.98-1.64), nor were other SES differences in walking for recreation and walking as recommended. Modifiable environmental factors were associated with walking and vigorous activity, especially perceived access to sidewalks and neighborhood attractiveness. Spatial access to attractive, public open space was associated with walking. CONCLUSIONS: Creating supportive environments--particularly sidewalks in attractive neighborhoods--has the potential to increase walking and vigorous activity.
Adolescent↗
Time-of-flight Laue fiber diffraction studies of perdeuterated DNA.
The diffractometer SXD at the Rutherford Appleton Laboratory ISIS pulsed neutron source has been used to record high resolution time-of-flight Laue fiber diffraction data from DNA. These experiments, which are the first of their kind, were undertaken using fibers of DNA in the A conformation and prepared using deuterated DNA in order to minimise incoherent background scattering. These studies complement previous experiments on instrument D19 at the Institut Laue Langevin using monochromatic neutrons. Sample preparation involved drawing large numbers of these deuterated DNA fibers and mounting them in a parallel array. The strategy of data collection is discussed in terms of camera design, sample environment and data collection. The methods used to correct the recorded time-of-flight data and map it into the final reciprocal space fiber diffraction dataset are also discussed. Difference Fourier maps showing the distribution of water around A-DNA calculated on the basis of these data are compared with results obtained using data recorded from hydrogenated A-DNA on D19. Since the methods used for sample preparation, data collection and data processing are fundamentally different for the monochromatic and Laue techniques, the results of these experiments also afford a valuable opportunity to independently test the data reduction and analysis techniques used in the two methods.
Crystallography↗
Embryogenesis in 100 per cent O 2 at reduced pressure.
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Aerobiosis↗