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Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
Published on: July 31, 2019
Temporal activation patterns of lateralized cognitive and task control processes in the human brain.
René Gobbelé1, Kathrin Lamberty, Klaas E Stephan
1Department of Neurology, University Hospital Aachen, RWTH Aachen, Germany. rgobbele@ukaachen.de
Brain Research
|March 21, 2008
Summary
Brain activity lateralization for visual processing depends on task demands. This study used event-related potentials (ERPs) to reveal the temporal dynamics of these lateralized cognitive processes.
Area of Science:
- Cognitive Neuroscience
- Electrophysiology
- Neuroimaging
Background:
- Previous fMRI research indicated task-dependent lateralization of brain activity in visual processing.
- Letter decisions activated the left hemisphere, while visuospatial decisions activated the right hemisphere.
Purpose of the Study:
- To explore the temporal dynamics of lateralized brain activity during visual processing.
- To investigate the relationship between task control and lateralized cognitive processes.
Main Methods:
- Multichannel event-related potentials (ERPs) were recorded using identical stimuli from a prior fMRI study.
- Current source density reconstruction (CDR) and source deconvolution were employed for ERP analysis.
Main Results:
- Letter decisions showed enhanced activity in Broca's area (200-250 ms).
- Visuospatial decisions revealed activity in the right posterior parietal cortex (PPC) (175-200 ms and 250-275 ms).
- The anterior cingulate cortex (ACC) showed early (125-150 ms) and late (400-425 ms) activation.
Conclusions:
- Electrophysiological data support task-dependent lateralization of cognitive processes, independent of stimulus properties.
- ERPs provide insights into the temporal dynamics of lateralized processing and cognitive control.
- Early differential activation of Broca's area and PPC, alongside ACC involvement, highlights their roles in specific processing and cognitive control.
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