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The Brain’s Reward System in Health and Disease

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Circadian Clock in Brain Health and Disease

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 1344))

Abstract

Rhythmic gene expression is found throughout the central nervous system. This harmonized regulation can be dependent on- and independent of- the master regulator of biological clocks, the suprachiasmatic nucleus (SCN). Substantial oscillatory activity in the brain’s reward system is regulated by dopamine. While light serves as a primary time-giver (zeitgeber) of physiological clocks and synchronizes biological rhythms in 24-h cycles, nonphotic stimuli have a profound influence over circadian biology. Indeed, reward-related activities (e.g., feeding, exercise, sex, substance use, and social interactions), which lead to an elevated level of dopamine, alters rhythms in the SCN and the brain’s reward system. In this chapter, we will discuss the influence of the dopaminergic reward pathways on circadian system and the implication of this interplay on human health.

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Correspondence to Emiliana Borrelli .

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Lewis, R.G., Florio, E., Punzo, D., Borrelli, E. (2021). The Brain’s Reward System in Health and Disease. In: Engmann, O., Brancaccio, M. (eds) Circadian Clock in Brain Health and Disease. Advances in Experimental Medicine and Biology, vol 1344. Springer, Cham. https://doi.org/10.1007/978-3-030-81147-1_4

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