Brain hothubs and dark functional networks: correlation analysis between amplitude and connectivity for Broca's aphasia.

ABSTRACT: Source localization and functional brain network modeling are methods of identifying critical regions during cognitive tasks. The first activity estimates the relative differences of the signal amplitudes in regions of interest (ROI) and the second activity measures the statistical dependence among signal fluctuations. We hypothesized that the source amplitude-functional connectivity relationship decouples or reverses in persons having brain impairments. Five Broca's aphasics with five matched cognitively healthy controls underwent overt picture-naming magnetoencephalography scans. The gamma-band (30-45 Hz) phase-locking values were calculated as connections among the ROIs. We calculated the partial correlation coefficients between the amplitudes and network measures and detected four node

SUBMITTER: Lin F 

PROVIDER: S-EPMC7533062 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature