| Records |
| Author |
Titulaer, M.; Spoelstra, K.; Lange, C.Y.M.J.G.; Visser, M.E. |
| Title |
Activity patterns during food provisioning are affected by artificial light in free living great tits (Parus major) |
Type |
Journal Article |
| Year |
2012 |
Publication  |
PloS one |
Abbreviated Journal |
PLoS One |
| Volume |
7 |
Issue |
5 |
Pages |
e37377 |
| Keywords |
Animals; Appetitive Behavior/*physiology; Feeding Behavior/*physiology; Female; Light/*adverse effects; Male; Nesting Behavior/*physiology; Netherlands; Passeriformes/*physiology; Photoperiod; Sex Factors |
| Abstract |
Artificial light may have severe ecological consequences but there is limited experimental work to assess these consequences. We carried out an experimental study on a wild population of great tits (Parus major) to assess the impact of light pollution on daily activity patterns during the chick provisioning period. Pairs that were provided with a small light outside their nest box did not alter the onset, cessation or duration of their working day. There was however a clear effect of artificial light on the feeding rate in the second half of the nestling period: when provided with artificial light females increased their feeding rate when the nestlings were between 9 and 16 days old. Artificial light is hypothesised to have affected the perceived photoperiod of either the parents or the offspring which in turn led to increased parental care. This may have negative fitness consequences for the parents, and light pollution may thus create an ecological trap for breeding birds. |
| Address |
Department of Animal Ecology, Netherlands Institute of Ecology, Wageningen, The Netherlands |
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Thesis |
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Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1932-6203 |
ISBN |
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| Notes |
PMID:22624023; PMCID:PMC3356403 |
Approved |
no |
| Call Number |
LoNNe @ kagoburian @ |
Serial |
840 |
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| Author |
Thorn, L.; Hucklebridge, F.; Esgate, A.; Evans, P.; Clow, A. |
| Title |
The effect of dawn simulation on the cortisol response to awakening in healthy participants |
Type |
Journal Article |
| Year |
2004 |
Publication |
Psychoneuroendocrinology |
Abbreviated Journal |
Psychoneuroendocrinology |
| Volume |
29 |
Issue |
7 |
Pages |
925-930 |
| Keywords |
Human Health; Adult; Affect/*physiology/radiation effects; Arousal/*physiology/radiation effects; Circadian Rhythm/*physiology; Female; Humans; Hydrocortisone/analysis/*physiology/radiation effects; *Light; Male; Middle Aged; Reference Values; Saliva/chemistry; Wakefulness/*physiology/radiation effects |
| Abstract |
Bright light exposure after awakening has been shown to elevate cortisol levels in healthy participants. The present study examined the effect of dawn simulation (a treatment for seasonal affective disorder) on the cortisol response to awakening and mood. Twelve healthy participants were supplied with a dawn simulator (The Natural Alarm Clock, Outside In, Cambridge Ltd), a bedside light that increases in intensity prior to awakening to approximately 250 lux over 30 mins when an audible alarm sounds. A counterbalanced study was performed on 4 consecutive normal weekdays, two of which were control days (no dawn simulation) and two experimental (dawn simulation). Saliva samples were taken immediately on awakening then at 15, 30 and 45 minutes post awakening on all 4 study-days. Total cortisol production during the first 45 mins after awakening was found to be significantly higher in the experimental condition than in the control condition. Participants also reported greater arousal in the experimental condition and there was a trend for an association between increased arousal and increased cortisol secretory activity under dawn simulation. This study provides supportive evidence for the role of light and the suprachiasmatic nucleus in the awakening cortisol response. |
| Address |
Department of Psychology, University of Westminster, 309 Regent Street, London W1R 8AL, UK |
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Thesis |
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Place of Publication |
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| Language |
English |
Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0306-4530 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
PMID:15177708 |
Approved |
no |
| Call Number |
LoNNe @ kagoburian @ |
Serial |
824 |
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| Author |
Knutsson, A.; Alfredsson, L.; Karlsson, B.; Akerstedt, T.; Fransson, E.I.; Westerholm, P.; Westerlund, H. |
| Title |
Breast cancer among shift workers: results of the WOLF longitudinal cohort study |
Type |
Journal Article |
| Year |
2013 |
Publication |
Scandinavian Journal of Work, Environment & Health |
Abbreviated Journal |
Scand J Work Environ Health |
| Volume |
39 |
Issue |
2 |
Pages |
170-177 |
| Keywords |
Adult; Aged; Breast Neoplasms/*epidemiology/etiology; Circadian Rhythm; Female; Humans; Incidence; Longitudinal Studies; Middle Aged; Proportional Hazards Models; Risk Assessment; Sweden/epidemiology; *Work Schedule Tolerance; oncogenesis |
| Abstract |
OBJECTIVE: The aim of this study was to investigate whether shift work (with or without night work) is associated with increased risk of breast cancer. METHODS: The population consisted of 4036 women. Data were obtained from WOLF (Work, Lipids, and Fibrinogen), a longitudinal cohort study. Information about baseline characteristics was based on questionnaire responses and medical examination. Cancer incidence from baseline to follow-up was obtained from the national cancer registry. Two exposure groups were identified: shift work with and without night work. The group with day work only was used as the reference group in the analysis. Cox regression analysis was used to calculate relative risk. RESULTS: In total, 94 women developed breast cancer during follow-up. The average follow-up time was 12.4 years. The hazard ratio for breast cancer was 1.23 [95% confidence interval (95% CI) 0.70-2.17] for shifts without night work and 2.02 (95% CI 1.03-3.95) for shifts with night work. When including only women <60 years of age, the risk estimates were 1.18 (95% CI 0.67-2.07) for shifts without night work, and 2.15 (95% CI 1.10-4.21) for shifts with night work. CONCLUSIONS: Our results indicate an increased risk for breast cancer among women who work shifts that includes night work. |
| Address |
Department of Health Sciences, Mid Sweden University, Sundsvall. Sweden. Anders.Knutsson@miun.se |
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Place of Publication |
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English |
Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0355-3140 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
PMID:23007867 |
Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
154 |
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| Author |
Chang, A.-M.; Scheer, F.A.J.L.; Czeisler, C.A.; Aeschbach, D. |
| Title |
Direct effects of light on alertness, vigilance, and the waking electroencephalogram in humans depend on prior light history |
Type |
Journal Article |
| Year |
2013 |
Publication |
Sleep |
Abbreviated Journal |
Sleep |
| Volume |
36 |
Issue |
8 |
Pages |
1239-1246 |
| Keywords |
Arousal/*radiation effects; Attention/radiation effects; Cross-Over Studies; *Electroencephalography; Female; Humans; *Light; Male; Melatonin/blood/physiology; Psychomotor Performance/radiation effects; Reaction Time; Wakefulness/*radiation effects; Young Adult; Light history; alertness and performance; light exposure |
| Abstract |
STUDY OBJECTIVES: Light can induce an acute alerting response in humans; however, it is unknown whether the magnitude of this response is simply a function of the absolute illuminance of the light itself, or whether it depends on illuminance history preceding the stimulus. Here, we compared the effects of illuminance history on the alerting response to a subsequent light stimulus. DESIGN: A randomized, crossover design was used to compare the effect of two illuminance histories (1 lux vs. 90 lux) on the alerting response to a 6.5-h 90-lux light stimulus during the biological night. SETTING: Intensive Physiologic Monitoring Unit, Brigham and Women's Hospital, Boston, MA. PARTICIPANTS: Fourteen healthy young adults (6 F; 23.5 +/- 2.9 years). INTERVENTIONS: Participants were administered two 6.5-h light exposures (LE) of 90 lux during the biological night. For 3 days prior to each LE, participants were exposed to either 1 lux or 90 lux during the wake episode. MEASUREMENTS AND RESULTS: The alerting response to light was assessed using subjective sleepiness ratings, lapses of attention, and reaction times as measured with an auditory psychomotor vigilance task, as well as power density in the delta/theta range of the waking EEG. The alerting response to light was greater and lasted longer when the LE followed exposure to 1 lux compared to 90 lux light. CONCLUSION: The magnitude and duration of the alerting effect of light at night depends on the illuminance history and appears to be subject to sensitization and adaptation. |
| Address |
Division of Sleep Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA. amchang@rics.bwh.harvard.edu |
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Thesis |
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Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0161-8105 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
PMID:23904684; PMCID:PMC3700721 |
Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
145 |
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| Author |
Kessel, L.; Siganos, G.; Jorgensen, T.; Larsen, M. |
| Title |
Sleep disturbances are related to decreased transmission of blue light to the retina caused by lens yellowing |
Type |
Journal Article |
| Year |
2011 |
Publication |
Sleep |
Abbreviated Journal |
Sleep |
| Volume |
34 |
Issue |
9 |
Pages |
1215-1219 |
| Keywords |
Adult; Age Factors; Aging/*pathology/physiology; Circadian Rhythm/physiology; Cross-Sectional Studies; Female; Fluorometry; Humans; Lens, Crystalline/*pathology/physiopathology; *Light; Male; Middle Aged; Retina/*physiopathology; Risk Factors; *Scattering, Radiation; Sleep Disorders/*etiology; Circadian rhythm; cataract; melanopsin; sleep; blue light |
| Abstract |
STUDY OBJECTIVES: Sleep pattern and circadian rhythms are regulated via the retinohypothalamic tract in response to stimulation of a subset of retinal ganglion cells, predominantly by blue light (450-490 nm). With age, the transmission of blue light to the retina is reduced because of the aging process of the human lens, and this may impair the photoentrainment of circadian rhythm leading to sleep disorders. The aim of the study was to examine the association between lens aging and sleep disorders. DESIGN: Cross-sectional population based study. SETTING: The study was performed at the Research Center for Prevention and Health, Glostrup Hospital, Denmark and at the Department of Ophthalmology, Herlev Hospital, Denmark. PARTICIPANTS: An age- and sex-stratified sample of 970 persons aged 30 to 60 years of age drawn from a sample randomly selected from the background population. INTERVENTIONS: Not applicable. MEASUREMENTS AND RESULTS: Sleep disturbances were evaluated by a combination of questionnaire and the use of prescription sleeping medication. Lens aging (transmission and yellowing) was measured objectively by lens autofluorometry. The risk of sleep disturbances was significantly increased when the transmission of blue light to the retina was low, even after correction for the effect of age and other confounding factors such as smoking habits, diabetes mellitus, gender, and the risk of ischemic heart disease (P < 0.0001). CONCLUSIONS: Filtration of blue light by the aging lens was significantly associated with an increased risk of sleep disturbances. We propose that this is a result of disturbance of photoentrainment of circadian rhythms. |
| Address |
Department of Ophthalmology, Glostrup Hospital, University of Copenhagen, Denmark. line.kessel@dadlnet.dk |
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Thesis |
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Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0161-8105 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
PMID:21886359; PMCID:PMC3157663 |
Approved |
no |
| Call Number |
IDA @ john @ |
Serial |
344 |
| Permanent link to this record |
