Bright environmental light ameliorates deficient subjective 'liking' in insomnia: an experience sampling study

Bart H.W. Te Lindert; Jacob Itzhacki; Wisse P. van der Meijden; Morten L. Kringelbach; Jorge Mendoza; Eus J.W. Van Someren

doi:10.1093/sleep/zsy022

Bright environmental light ameliorates deficient subjective 'liking' in insomnia: an experience sampling study

Bart H.W. Te Lindert, Jacob Itzhacki, Wisse P. van der Meijden, Morten L. Kringelbach, Jorge Mendoza, Eus J.W. Van Someren

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Abstract

Study Objectives: Altered comfort sensing and reduced gray matter volume in the orbitofrontal cortex of the brain in people suffering from insomnia disorder (ID) suggest compromised processes of motivation and hedonia. The experience sampling (ES) method was used to evaluate whether, in naturalistic conditions, people with ID differ from those without sleep complaints with respect to subjective Wanting and Liking, two major dimensions of the reward system. Since light affects brain circuits involved in affect and reward, ES was combined with ambulatory monitoring of light intensity fluctuations to evaluate their effect on subjective Wanting and Liking. Methods: Participants with ID (n = 17, 12 females, 56.8 ± 6.5 mean ± standard deviation years of age) and matched controls without sleep complaints (n = 18, 12 females, 57.0 ± 8.6 years of age) were probed by a smartphone alarm to log their subjective Wanting, Liking, and mood nine times a day for 7 days. Using an ambulatory light recorder, light intensity exposure was sampled simultaneously and averaged over the intervals between subsequent ES alarms. Mixed-effect models were used to evaluate how ID and varying light intensity affected subjective assessments. Results: The results indicated significantly lower subjective Liking and Wanting in people suffering from ID, particularly at low environmental light intensity. Conclusions: Wanting and Liking, rather than more commonly used mood adjectives, showed an increased sensitivity to detect deficient hedonic and reward processing in insomnia during everyday life. Deficient Liking may in part be rescued by exposure to bright environmental light.

Original language	English
Article number	zsy022
Pages (from-to)	1-13
Number of pages	13
Journal	Sleep
Volume	41
Issue number	4
Early online date	7 Feb 2018
DOIs	https://doi.org/10.1093/sleep/zsy022
Publication status	Published - Apr 2018

Funding

The authors would like to thank Jessica Bruijel, Jeske Hendriks, Jesminne Castricum, and Liz Vink (Netherlands Institute for Neuroscience) for their help with recruitment and assessment. This work was supported by Project NeuroSIPE 10738, of the Dutch Technology Foundation STW, which is part of the Netherlands Organization for Scientific Research (NWO) and partly funded by the Ministry of Economic Affairs, Agriculture and Innovation. This work was also supported by Light, Cognition, Behaviour and Health (LCBH) project 058-14-001 of the National Inititiative Brain and Cognition (NIBC) of the Netherlands Organisation for Scientific Research, The Hague, The Netherlands. This project was moreover funded with support from the NeuroTime Erasmus+: Erasmus Mundus programme, grant: 520124-1-2011-1-FR-ERA and by the European Research Council (ERC-ADG-2014–671084 INSOMNIA), both of the European Commission. This publication reflects the views only of the authors, and the Commission cannot be held responsible for any use that may be made of the information contained therein. This work was supported by Project NeuroSIPE 10738, of the Dutch Technology Foundation STW, which is part of the Netherlands Organization for Scientific Research (NWO) and partly funded by the Ministry of Economic Affairs, Agriculture and Innovation. This work was also supported by Light, Cognition, Behaviour and Health (LCBH) project 058-14-001 of the National Inititiative Brain and Cognition (NIBC) of the Netherlands Organisation for Scientific Research, The Hague, The Netherlands. This project was moreover funded with support from the NeuroTime Erasmus+: Erasmus Mundus programme, grant: 520124-1-2011-1-FR-ERA and by the European Research Council (ERC-ADG-2014–671084 INSOMNIA), both of the European Commission. This publication reflects the views only of the authors, and the Commission cannot be held responsible for any use that may be made of the information contained therein.

Funders	Funder number
Commission
National Inititiative Brain and Cognition
Horizon 2020 Framework Programme	671084, 737634
European Commission
European Research Council	ERC-ADG-2014–671084 INSOMNIA
Nederlandse Organisatie voor Wetenschappelijk Onderzoek	520124-1-2011-1-FR-ERA
Stichting voor de Technische Wetenschappen
Ministerie van Economische Zaken, Landbouw en Innovatie	058-14-001
Nederlands Herseninstituut	10738

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Bright environmental light ameliorates deficient subjective ‘liking’ in insomniaFinal published version, 501 KBLicence: Article 25fa Dutch Copyright Act

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title = "Bright environmental light ameliorates deficient subjective 'liking' in insomnia: an experience sampling study",

abstract = "Study Objectives: Altered comfort sensing and reduced gray matter volume in the orbitofrontal cortex of the brain in people suffering from insomnia disorder (ID) suggest compromised processes of motivation and hedonia. The experience sampling (ES) method was used to evaluate whether, in naturalistic conditions, people with ID differ from those without sleep complaints with respect to subjective Wanting and Liking, two major dimensions of the reward system. Since light affects brain circuits involved in affect and reward, ES was combined with ambulatory monitoring of light intensity fluctuations to evaluate their effect on subjective Wanting and Liking. Methods: Participants with ID (n = 17, 12 females, 56.8 ± 6.5 mean ± standard deviation years of age) and matched controls without sleep complaints (n = 18, 12 females, 57.0 ± 8.6 years of age) were probed by a smartphone alarm to log their subjective Wanting, Liking, and mood nine times a day for 7 days. Using an ambulatory light recorder, light intensity exposure was sampled simultaneously and averaged over the intervals between subsequent ES alarms. Mixed-effect models were used to evaluate how ID and varying light intensity affected subjective assessments. Results: The results indicated significantly lower subjective Liking and Wanting in people suffering from ID, particularly at low environmental light intensity. Conclusions: Wanting and Liking, rather than more commonly used mood adjectives, showed an increased sensitivity to detect deficient hedonic and reward processing in insomnia during everyday life. Deficient Liking may in part be rescued by exposure to bright environmental light.",

author = "{Te Lindert}, {Bart H.W.} and Jacob Itzhacki and {van der Meijden}, {Wisse P.} and Kringelbach, {Morten L.} and Jorge Mendoza and {Van Someren}, {Eus J.W.}",

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AU - Kringelbach, Morten L.

AU - Mendoza, Jorge

AU - Van Someren, Eus J.W.

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Bright environmental light ameliorates deficient subjective 'liking' in insomnia: an experience sampling study

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