Revealing Whole-Brain Causality Networks During Guided Visual Searching.

ABSTRACT: In our daily lives, we use eye movements to actively sample visual information from our environment ("active vision"). However, little is known about how the underlying mechanisms are affected by goal-directed behavior. In a study of 31 participants, magnetoencephalography was combined with eye-tracking technology to investigate how interregional interactions in the brain change when engaged in two distinct forms of active vision: freely viewing natural images or performing a guided visual search. Regions of interest with significant fixation-related evoked activity (FRA) were identified with spatiotemporal cluster permutation testing. Using generalized partial directed coherence, we show that, in response to fixation onset, a bilateral cluster consisting of four regions (posterior insula,

SUBMITTER: Kiefer CM 

PROVIDER: S-EPMC8894880 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature