Brain signatures indexing variation in internal processing during perceptual decision-making.

ABSTRACT: Brain activity is highly variable during a task. Discovering, characterizing, and linking variability in brain activity to internal processes has primarily relied on experimental manipulations. However, changes in internal processing could arise from many factors independent of experimental conditions. Here we utilize a data-driven clustering method based on modularity-maximation to identify consistent spatial-temporal EEG activity patterns across individual trials. Subjects (N = 25) performed a motion discrimination task with six interleaved levels of coherence. Clustering identified two discrete subtypes of trials with different patterns of activity. Surprisingly, Subtype 1 occurred more frequently in trials with lower motion coherence but was associated with faster response times. Compu

SUBMITTER: Nakuci J 

PROVIDER: S-EPMC10505979 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature