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Session Schedule

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0:00:00
Introduction

0:02:37
Chronotype differences in motivation and dopamine binding capacity across the day
Leonie Balter (Netherlands)

0:20:22
The impact of insufficient sleep on dietary choices and physical activity behaviours
Sean Drummond (Australia)

0:40:54
The role of sleep and sleepiness for social behaviour
Tina Sundelin (Sweden)

1:02:53
Sleepiness as motivation: A mechanism for how insufficient sleep and other stressors drive behavior to safeguard recovery
John Axelsson (Sweden)

Summary

Behavior is at the heart of all aspects of life, from the smallest choice to how we interact successfully with other individuals in society. While our behavior is fundamental for our health and wellbeing, we know surprisingly little of how sleep and circadian factors shape it. The symposium will present novel findings of how sleep and circadian factors influences our motivation and behavior, including physical and social activities as well as food intake in both the lab and the real world. The speakers will also present data showing that dopamine-related processes and sleepiness are likely mechanisms driving these changes.
PhD. Leonie Balter will discuss how individual differences, particularly chronotype, shape diurnal variations in motivation and dopamine-related processes. This talk will highlight the broader implications of these variations for behavior and well-being.
Prof. Sean Drummond will present new, unpublished data examining how one week of at-home sleep restriction (5-6 hours TIB/night), relative to healthy sleep duration (8-9 hours TIB) impacts 24-hour dietary choices and physical activity. These data reveal the relationship between sleep restriction and food intake in real-life settings may be different than the typical findings from well-controlled lab studies.
Associate Prof. Tina Sundelin will present work on how sleep and sleepiness may affect one’s motivation to be social, but the relationship between motivation and behavior is not always clear cut. This talk will dig deeper into social behavior following sleep loss, including whether sleepiness also predicts one’s perceptions of social experiences.
Prof. Axelsson will present recent data, also unpublished, showing that sleepiness can be seen as a motivational state that drives a wide range of behavior. In this way sleepiness helps organize behaviors toward the specific goal of assuring sufficient sleep and recovery, in competition with other needs and incentives. He will also present a theoretical framework where sleepiness and its behavioral consequences are likely to improve our understanding of several disease mechanisms.
The speakers will present data from laboratory experiments (Sundelin and Axelsson), and large scale field studies (Sundelin and Balter), report clinical symptoms (Balter), findings from real world interventions (Drummond), and present a novel theoretical framework for how sleep influences behavior (Axelsson). The speakers represent both sexes, are in different stages of their careers (early career researchers to very established professors), and represent research from two continents (Europe and Australia).