University of Groningen
Grasping light
Lok, Renske
DOI:
10.33612/diss.173352710
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Publication date:
2021
Link to publication in University of Groningen/UMCG research database
Citation for published version (APA):
Lok, R. (2021). Grasping light: Mental and physiological responses to illumination. University of Groningen.
https://doi.org/10.33612/diss.173352710
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1. One hour of bright light exposure during the day does not increase subjective alertness or mental performance in well rested individuals (Chapter 3).
2. Prolonged intervals (6 hours) of bright light exposure during the day can significantly improve mental performance, even though this may not be perceived as such (Chapter 5).
3. After a night of too little sleep, bright light can induce feelings of alertness (Chapter 5, Discussion).
4. To stimulate consolidated sleep, it may be better to replace the soporific effects of a melatonin pill by increased light exposure during the preceding day (Chapter 4 & 7).
5. Light can affect human thermoregulation (Chapter 4, 6 & Discussion).
6. Changes in body temperature are not causally related to changes in subjective alertness, even though they often occur in parallel (Chapter 4, 6 & Discussion).
7. For winning Olympic gold, the phase of the circadian clock can be critical (Chapter 8).
8. There is significantly more to human light perception than seeing. 9. Circadian rhythm research may require that the investigator acts
against her own circadian system.
10. Time of day should be taken into account in every experiment, within or outside the field of Chronobiology.
