Influence of White and Gray Matter Connections on Endogenous Human Cortical Oscillations.

ABSTRACT: Brain oscillations reflect changes in electrical potentials summated across neuronal populations. Low- and high-frequency rhythms have different modulation patterns. Slower rhythms are spatially broad, while faster rhythms are more local. From this observation, we hypothesized that low- and high-frequency oscillations reflect white- and gray-matter communications, respectively, and synchronization between low-frequency phase with high-frequency amplitude represents a mechanism enabling distributed brain-networks to coordinate local processing. Testing this common understanding, we selectively disrupted white or gray matter connections to human cortex while recording surface field potentials. Counter to our original hypotheses, we found that cortex consists of independent oscillatory-units

SUBMITTER: Hawasli AH 

PROVIDER: S-EPMC4923146 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature