Virtual fMRI brown bag: November 5, 2021

Please join us for a talk given by Csaba Orban, a postdoctoral fellow at the National University of Singapore.

Time: 10:00am-11:00am

Place: Zoom - https://dartmouth.zoom.us/j/95714289393?pwd=a3g0Y0xRam83TUZiWW50UUp3S3RGUT09

Time of day effects in resting state fMRI

Abstract: Diurnal rhythms are an integral part of our physiology, yet neuroimaging studies rarely consider the potential effects of time of day. In this talk I will present evidence from our recent study exploring time of day associated variation in resting brain activity. In contrast to previous work on this topic, which has mostly relied on longitudinal designs with small samples, here we leveraged the wide variation in scan times in the Human Connectome Project dataset to examine the effects of time of day on resting state fMRI across hundreds of participants. As I will show, we observed robust time of day associated changes in several measures of resting brain activity that were similar in magnitude to typically reported brain–behavioural correlations in the literature. I will also discuss putative mechanisms and some potential implications for the field.