Nature's clocks and human mood: The circadian system modulates reward motivation
Journal article
Murray, Greg, Nicholas, Christian, Kleiman, Jan, Dwyer, Robyn, Carrington, Melinda, Allen, Nicholas and Trinder, John. (2009). Nature's clocks and human mood: The circadian system modulates reward motivation. Emotion (online version). 9(5), pp. 705 - 716. https://doi.org/10.1037/a0017080
Authors | Murray, Greg, Nicholas, Christian, Kleiman, Jan, Dwyer, Robyn, Carrington, Melinda, Allen, Nicholas and Trinder, John |
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Abstract | Existing literature on reward motivation pays scant attention to the fact that reward potential of the environment varies dramatically with the light/dark cycle. Evolution, by contrast, treats this fact very seriously: In all species, the circadian system is adapted to optimize the daily rhythm of environmental engagement. We used 3 standard protocols to demonstrate that human reward motivation, as measured in the dynamics of positive affect (PA), is modulated endogenously by the circadian clock. Under naturalistic conditions, 13.0% of PA variance was explained by a 24-hr sinusoid. In a constant routine protocol, 25.0% of PA variance was explained by the unmasked circadian rhythm in core body temperature (CBT). A forced desynchrony study showed PA to align with CBT in exhibiting circadian periodicity independent of a 28-hr sleep/wake cycle. It is concluded that the circadian system modulates reward activation, and implications for models of normal and abnormal mood are discussed. |
Year | 2009 |
Journal | Emotion (online version) |
Journal citation | 9 (5), pp. 705 - 716 |
ISSN | 1931-1516 |
Digital Object Identifier (DOI) | https://doi.org/10.1037/a0017080 |
Page range | 705 - 716 |
Publisher's version | File Access Level Controlled |
https://acuresearchbank.acu.edu.au/item/88590/nature-s-clocks-and-human-mood-the-circadian-system-modulates-reward-motivation
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