High‐Intensity Environmental Light in Dementia: Effect on Sleep and Activity

Sloane, Philip D.; Williams, Christianna S.; Mitchell, C. Madeline; Preisser, John S.; Wood, Wendy; Barrick, Ann Louise; Hickman, Susan E.; Gill, Karminder S.; Connell, Bettye Rose; Edinger, Jack D.; Zimmerman, Sheryl

doi:10.1111/j.1532-5415.2007.01358.x

Cited by 155 publications

(130 citation statements)

References 32 publications

Supporting

Mentioning

116

Contrasting

Unclassified

Order By: Relevance

“…Figueiro et al [47,48], van Someren et al [45], Sloane et al [52] and Riemersma-van der Lek [53], demonstrated that light of the right spectrum and of sufficient amount applied at the proper circadian time can positively impact sleep efficiency and sleep consolidation in older adults, including those with AD. The present results are also consistent with the knowledge that the circadian system is maximally sensitive to short wavelength radiation (blue light) and minimally sensitive to long wavelength radiation (yellow and red).…”

Section: Discussionmentioning

confidence: 99%

Developing Architectural Lighting Designs to Improve Sleep in Older Adults

Figueiro¹,

Saldo²,

Rea³

et al. 2008

TOSLPJ

View full text Add to dashboard Cite

This paper discusses a proposed 24-hr lighting scheme for older adults that can positively impact the aging visual, circadian and perceptual systems. New lighting was installed in eight private rooms in an assisted living facility. Measurements of residents' sleep quality and circadian rest-activity patterns were obtained, before and after the new lighting was installed. Consistent with predictions based upon previous research, the subjects who completed the study showed an improvement in sleep quality and rest/activity rhythms under the new 24-hr lighting scheme. In addition, all study participants reported a strong preference for the 24-hr lighting. The new lighting not only provides older adults with good lighting for performing their routine visual tasks, but also promotes high circadian light stimulation during the day and low circadian light stimulation at night. Although not studied here, but also discussed as part of the 24-hr lighting scheme, is the impact of a previously studied, novel night-light system that provides older adults with enhanced perceptual cues for nighttime navigation within the room. The new 24-hr lighting scheme appears to have important practical implications for improving the quality of life for seniors and will hopefully be adopted by architects, lighting specifiers and engineers.

show abstract

Section: Discussionmentioning

confidence: 99%

Developing Architectural Lighting Designs to Improve Sleep in Older Adults

Figueiro¹,

Saldo²,

Rea³

et al. 2008

TOSLPJ

View full text Add to dashboard Cite

show abstract

“…Therefore, it is suggested that to obtain more beneficial effects, light must be turned on no earlier than the autumn equinox, and turned off not later than the spring equinox [48]. To minimize the potential bias from differences in daylight exposure, some authors recommended equally distributing treatment and placebo conditions across seasons [56, 64]. Another relevant aspect is the setting in which the light intervention is delivered and the modality of light exposure.…”

Section: Discussionmentioning

confidence: 99%

Effects of Light Treatment on Sleep, Cognition, Mood, and Behavior in Alzheimer’s Disease: A Systematic Review

Mitolo

Tonon

Morgia

et al. 2018

Dement Geriatr Cogn Disord

View full text Add to dashboard Cite

Background: Bright light treatment is a therapeutic intervention mainly used to treat sleep and circadian disturbances in Alzheimer’s disease (AD) patients. Recently, a handful of studies also focused on the effect on cognition and behavior. Conflicting findings are reported in the literature, and no definite conclusions have been drawn about its specific therapeutic effect. Summary: The aim of this review is to provide a critical evaluation of available evidence in this field, highlighting the specific characteristics of effective bright light treatment. Eligible studies were required to assess at least one of the following outcome measures: sleep, cognition, mood, and/or behavior (e.g., depression, agitation). A total of 32 articles were included in this systematic review and identified as research intervention studies about light treatment in AD. The quality of the papers was evaluated based on the US Preventive Service Task Force guidelines. Key Messages: Overall, the current literature suggests that the effects of light treatment in AD patients are mixed and may be influenced by several factors, but with a general trend toward a positive effect. Bright light seems to be a promising intervention treatment without significant adverse effects; therefore, further well-designed randomized controlled trials are needed taking into account the highlighted recommendations.

show abstract

“…Sloane et al [69] showed a statistically significant improvement in nighttime sleep with morning or all-day light (>2500 lux at the cornea), with greater improvement among persons with severe dementia. The authors claim that the effect size was greater than has been reported using prescription sleep medicines in long-term care populations.…”

Section: Review Figueiromentioning

confidence: 99%

Light, Sleep and Circadian Rhythms in Older Adults With Alzheimer’s Disease and Related Dementias

Figueiro

2017

Neurodegener. Dis. Manag.

View full text Add to dashboard Cite

Alzheimer's disease and related dementias (ADRD) can cause sleep and behavioral problems that are problematic for ADRD patients and their family caregivers. Light therapy has shown promise as a nonpharmacological treatment, and preliminary studies demonstrate that timed light exposure can consolidate and improve nighttime sleep efficiency, increase daytime wakefulness and reduce evening agitation without the adverse effects of pharmacological solutions. Compliance with light treatment and the accurate measurement of light exposures during treatment, however, have presented barriers for the adoption of light therapy for ADRD. Recent research showing that the circadian system is maximally sensitive to short-wavelength light opens the way for the potential application of lower, more-targeted light intensities to maximize compliance and individualize light dose/timing in therapeutic settings.

show abstract

High‐Intensity Environmental Light in Dementia: Effect on Sleep and Activity

Abstract: Bright light appears to have a modest but measurable effect on sleep in this population, and ambient light may be preferable to stationary devices such as light boxes.

Cited by 155 publications

References 32 publications

Developing Architectural Lighting Designs to Improve Sleep in Older Adults

Developing Architectural Lighting Designs to Improve Sleep in Older Adults

Effects of Light Treatment on Sleep, Cognition, Mood, and Behavior in Alzheimer’s Disease: A Systematic Review

Light, Sleep and Circadian Rhythms in Older Adults With Alzheimer’s Disease and Related Dementias

Contact Info

Product

Resources

About