Time-of-day differences and short-term stability of the neural response to monetary reward: a pilot study.

ABSTRACT: Human and animal studies indicate that reward function is modulated by the circadian clock that governs our daily sleep/wake rhythm. For example, a robust circadian rhythm exists in positive affect, which is lower in the morning hours and peaks in the afternoon. A handful of functional neuroimaging studies suggest that systematic diurnal variation exists in brain activity related to other functions, but no published human studies have examined daily variation in the neural processing of reward. In the present study, we attempt to advance this literature by using functional neuroimaging methods to examine time-of-day changes in the responsivity of the reward circuit. Using a within-person design and a functional magnetic resonance imaging (fMRI) monetary reward task, we compared morning and

SUBMITTER: Hasler BP 

PROVIDER: S-EPMC4157087 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature