Neural synchrony and white matter variations in the human brain — Relation between evoked gamma frequency and corpus callosum morphology

Zaehle, Tino; Herrmann, Christoph S.

doi:10.1016/j.ijpsycho.2010.06.029

Cited by 25 publications

(19 citation statements)

References 71 publications

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“…Demonstrating that long-range corticocortical functional connectivity correlates with corpus callosum pathways further helps establish the validity of the approach of linking DTI and EEG to understand brain functional architecture. Indeed, this finding is consistent with recent reports linking visual stimulus-evoked gamma oscillations to corpus callosum integrity (Zaehle and Herrmann, 2011), and also resting-state EEG connectivity (Teipel et al, 2009). Because this analysis was based on synchronization degree difference between error and correct trials, this result does not simply reflect stable trait differences in connectivity, but rather specific increases in functional coupling resulting from errors.…”

Section: White Matter Connectivity Network Supporting Error Processingsupporting

confidence: 90%

Error-related medial frontal theta activity predicts cingulate-related structural connectivity

2011

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Studies on electrophysiological signatures of error processing have focused on the medial frontal cortex, although widespread neuroanatomical networks support error/action monitoring. Here, electrophysiological responses to errors were combined with structural white matter diffusion tensor imaging (DTI) to investigate the long-range anatomical networks that support error processing. The approach taken here was to link individual differences in error-related EEG responses to individual differences in white matter connectional anatomy. Twenty subjects performed a speeded instructed choice task (a variant of the Simon task) designed to elicit response errors, and also underwent DTI scanning in a separate session. In the EEG data, significantly enhanced theta (4-8 Hz) oscillations were observed over medial frontal electrodes (centered on FCz) during response errors. Mid-frontal scalp sites (likely reflecting medial frontal cortex activity) also functioned as a strong "hub" for information flow, measured through theta-band phase synchronization degree. Next, a dipole source of the error-related theta-band activity was localized for each subject, accounting for approximately 80% of the topographical variance. Correlating individual differences in medial frontal theta dynamics with white matter tracts linking these dipole sources to the rest of the brain revealed that subjects with stronger error-related theta also had stronger white matter connectivity with the ventral striatum and inferior frontal gyrus. Further, subjects in whom medial frontal regions acted as a stronger synchronization "hub" had stronger connectivity between the dipole source location and the corpus callosum and dorsomedial prefrontal white matter pathways. These findings provide novel evidence for the role of widespread fronto-striatal networks in monitoring actions and signaling behavioral errors.

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Section: White Matter Connectivity Network Supporting Error Processingsupporting

confidence: 90%

Error-related medial frontal theta activity predicts cingulate-related structural connectivity

2011

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“…Furthermore, combining measures of oscillatory activity and functional and structural fMRI [244,245] will further elucidate the relationship between reductions in grey and white matter and impairments in oscillatory activity.…”

Section: Conclusion and Future Researchmentioning

confidence: 99%

Exploring intermediate phenotypes with EEG: Working memory dysfunction in schizophrenia

Haenschel

Linden

2011

Behavioural Brain Research

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“…Kaiser et al, 2008;Lenz et al, 2008), substantiating the high involvement in cognition and behavior . Arising from their intra-individual stability, but variation across individuals (Fründ et al, 2007), they have been suggested a human trait variable (Zaehle et al, 2009) and are related to individual brain structure (Zaehle and Herrmann, 2011). Thus, a relationship between altered GBRs and pathological brain states involving impairments in these processes could be expected (Başar and Güntekin, 2008;Herrmann and Demiralp, 2005;.…”

Section: Introductionmentioning

confidence: 99%

Altered evoked gamma-band responses as a neurophysiological marker of schizophrenia?

Lenz

Fischer

Schadow

et al. 2011

International Journal of Psychophysiology

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Neural synchrony and white matter variations in the human brain — Relation between evoked gamma frequency and corpus callosum morphology

Cited by 25 publications

References 71 publications

Error-related medial frontal theta activity predicts cingulate-related structural connectivity

Error-related medial frontal theta activity predicts cingulate-related structural connectivity

Exploring intermediate phenotypes with EEG: Working memory dysfunction in schizophrenia

Altered evoked gamma-band responses as a neurophysiological marker of schizophrenia?

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