Differential recruitment of brain networks during visuospatial and color processing: Evidence from ERP microstates

Antonova, Ingrida; Bänninger, Anja; Dierks, Thomas; Griskova-Bulanova, I; König, Thomas; Kohler, Axel (2015). Differential recruitment of brain networks during visuospatial and color processing: Evidence from ERP microstates. Neuroscience, 305, pp. 128-138. Elsevier 10.1016/j.neuroscience.2015.07.078

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Recent functional magnetic resonance imaging (fMRI) studies consistently revealed contributions of fronto-parietal and related networks to the execution of a visuospatial judgment task, the so-called "Clock Task". However, due to the low temporal resolution of fMRI, the exact cortical dynamics and timing of processing during task performance could not be resolved until now. In order to clarify the detailed cortical activity and temporal dynamics, 14 healthy subjects performed an established version of the "Clock Task", which comprises a visuospatial task (angle discrimination) and a control task (color discrimination) with the same stimulus material, in an electroencephalography (EEG) experiment. Based on the time-resolved analysis of network activations (microstate analysis), differences in timing between the angle compared to the color discrimination task were found after sensory processing in a time window starting around 200ms. Significant differences between the two tasks were observed in an analysis window from 192ms to 776ms. We divided this window in two parts: an early phase - from 192ms to ∼440ms, and a late phase - from ∼440ms to 776ms. For both tasks, the order of network activations and the types of networks were the same, but, in each phase, activations for the two conditions were dominated by differing network states with divergent temporal dynamics. Our results provide an important basis for the assessment of deviations in processing dynamics during visuospatial tasks in clinical populations.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Psychiatric Neurophysiology (discontinued)
04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy

Graduate School:

Graduate School for Health Sciences (GHS)

UniBE Contributor:

Antonova, Ingrida; Bänninger, Anja; Dierks, Thomas; König, Thomas and Kohler, Axel

Subjects:

500 Science
600 Technology > 610 Medicine & health

ISSN:

0306-4522

Publisher:

Elsevier

Language:

English

Submitter:

Thomas König

Date Deposited:

30 Sep 2015 15:02

Last Modified:

09 Sep 2017 22:25

Publisher DOI:

10.1016/j.neuroscience.2015.07.078

PubMed ID:

26241335

Uncontrolled Keywords:

microstate analysis; visuospatial judgment; EEG; ERP; parietal cortex; frontal cortex

BORIS DOI:

10.7892/boris.72077

URI:

https://boris.unibe.ch/id/eprint/72077

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