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Ambient Bright Light In Dementia: Effects On Behaviour and Circadian Rhythmicity

机译：老年痴呆症的环境明亮光：对行为和昼夜节律的影响

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摘要

Behavioural and psychological symptoms, such as nocturnal restlessness and wandering, are seen in 90% of patients with dementia at some point in their course. Non-pharmacologic interventions, such as high-intensity lighting, can play an important role in managing these behavioural and psychological symptoms by impacting both the visual and the circadian system. In order to assess the effects of prolonged exposure to high-intensity light (about 1800 lx horizontal on table level) on behaviour and circadian rhythmicity of institutionalised older adults with dementia, ceiling-mounted luminaires emitting bluish (6500 K) and yellowish (2700 K) light were installed in an intervention group that was compared to a control group of traditional dim lighting equipment. The study was performed from May to August 2006. Effects of the lighting intervention were assessed by the Dutch Behaviour Observation Scale for Intramural Psychogeriatrics (GIP), and tympanic temperature measurements. In the bluish light scenario, a significant improvement in restless behaviour was observed in the intervention group, as well as a significant increase in the range of tympanic temperature. These effects were not found in the yellowish light scenario. Further evidence is found that high-intensity bluish light may play a role in managing restless behaviour and improving circadian rhythmicity in institutionalised older adults with dementia.
机译：90％的痴呆症患者在病程中的某个时间点会出现行为和心理症状，例如夜间躁动和徘徊。非药物干预措施（例如高强度照明）可以通过影响视觉和昼夜节律系统，在管理这些行为和心理症状方面发挥重要作用。为了评估长时间暴露于高强度光（水平水平约1800 lx）对痴呆的制度化老年人的行为和昼夜节律的影响，吊顶安装的灯具发出蓝光（6500 K）和发黄光（2700 K） ）光安装在干预组中，与传统的昏暗照明设备对照组相比。该研究于2006年5月至2006年8月进行。照明干预的效果通过《荷兰行为观察量表（GIP）和鼓膜温度测量》进行了评估。在微光的情况下，干预组的躁动行为明显改善，鼓膜温度范围也明显增加。在淡黄色场景中未发现这些影响。进一步的证据表明，高强度的蓝光可能在管理失智的老年痴呆症患者的不安行为和改善昼夜节律方面起作用。

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