Phasor diagrams clock oscillatory hemodynamic switching between overt speech production and micro resting states.

ABSTRACT: This study investigates the intricate interplay between the task-positive network and the default mode network (DMN) during transitions between overt language tasks and brief resting periods. While previous research suggests that these networks are not invariably anticorrelated, the precise timing of transitions has remained elusive. We employed rapid phase-encoded fMRI to decode brain dynamics with ultimate precision, capturing these transitions in real time. By utilizing phasor diagrams to represent the oscillatory activities, we examined the amplitudes and phases of hemodynamic fluctuations within the language network and DMN. Our findings align with existing empirical and theoretical perspectives on DMN functions and cognitive task performance, affirming the validity of our approach. W

SUBMITTER: Huang RS 

PROVIDER: S-EPMC12324318 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature