Poster C29, Sunday, March 26, 5:00 – 7:00 pm, Pacific Concourse
Resting-state temporal dynamics and mind-wandering frequency during reading
Erik Erwin Jahner1,2, Xiao-Fei Yang1, Mary Helen Immordino-Yang1; 1USC, 2University of California Riverside
The frequency of unintended mind-wandering during reading varies between individuals; several brain networks identified during rest have previously been associated with this phenomenon. An assumption behind resting-state analysis is that neural cooperation between regions is reflected through temporal synchrony of BOLD activation, however these networks may be an emergent property of sequential activity patterns (Mitra & Raichle, 2016). By applying a cross-covariance function to BOLD activity patterns across regions, one can capture some of these temporal dynamics. Resulting “projection maps” representing average latency of a region may reveal group differences not discoverable by traditional resting-state analysis (Mitra, Snyder, Constantino, and Raichle, 2015). In the present study this lag-analysis was conducted on the resting-state scans of 31 adolescents who subsequently read a narrative presented on 17 slides, between which participants were probed for mind-wandering frequency. Correlations between mind-wandering frequency and lag-map projections were then evaluated. Results of this exploratory analysis suggest that the latency of regions implicated in internal thought, reading, and voice awareness correlate with mind-wandering frequency: individuals who mind-wandered more frequently showed an increased latency of the precuneus (p<.01, r=.43, uncorrected), a region implicated in the regulation of internal thought, and the posterior insula (p<.005, r=.50, uncorrected), a region implicated in bodily awareness; increased latency in traditional reading regions of visual-word-form area (p<.005, r=.51, uncorrected) and Broca’s area (p<.005, r=.50, uncorrected); and negative latency at the middle temporal sulcus implicated in voice perception (p<.005, r=-.51, uncorrected). These results suggest temporal dynamics during resting-state may be predictive of mind-wandering frequency.
Topic Area: EMOTION & SOCIAL: Other