White Matter Microstructure within the Superior Longitudinal Fasciculus Modulates the Degree of Response Conflict Indexed by N2 in Healthy Adults.

White Matter Microstructure within the Superior Longitudinal Fasciculus Modulates the Degree of Response Conflict Indexed by N2 in Healthy Adults. Brain Res. 2017 Sep 12;: Authors: Gao S, Liu P, Guo J, Zhu Y, Liu P, Sun J, Yang X, Qin W Abstract Response conflict can be induced by priming multiple responses competing for control of action in trials. The N2 is one functionally-related cognitive control index for response conflict. And yet the underlying whiter matter neural substrates of inter-individual difference in conflict N2 remain unclear. So the aim of present study was to address the white matter microstructure of the N2 responsible for conflict by directly relating the amplitude cost of the event-related potential (ERP) N2 component to diffusion tensor imaging (DTI) indices in healthy subjects. Thirty healthy subjects underwent DTI scanning and electrophysiology recording during a modified Flanker task. N2 was a stimulus-locked negative ERP component. Fractional anisotropy (FA) was calculated based on DTI measures and was assumed to reflect the integrity of myelinate fiber bundles. Therefore, we tested the relationship between N2 amplitude and FA in brain white matter. Results showed that FA, an index for white matter characteristics, in the right superior longitudinal fasciculus (SLF) was significantly positively associated with N2 amplitude cost. The N2 amplitude cost also predicted response time (RT) cost in the Flanker ta...
Source: Brain Research - Category: Neurology Authors: Tags: Brain Res Source Type: research
More News: Brain | Neurology | PET Scan | Study