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Extracting Visual Evoked Potentials from EEG Data Recorded During fMRI-guided Transcranial Magnetic Stimulation
Published on: May 12, 2014
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A frontosensory circuit for visual context processing is synchronous in the theta/alpha band
Georgia Bastos1,2, Jacob T Holmes1, Jordan M Ross1,3
1Neuroscience Institute, Georgia State University, Petit Science Center, 100 Piedmont Ave, Atlanta, GA 30303.
Biorxiv : the Preprint Server for Biology
|March 3, 2023
Summary
Detecting visual oddballs relies on brain synchrony. The anterior cingulate area (ACa) and primary visual cortex (V1) coordinate via theta/alpha waves, modulating specific interneurons for context processing.
Area of Science:
- Neuroscience
- Visual Cortex Research
- Neural Circuitry
Background:
- Visual context processing relies on detecting deviations from regular patterns.
- Deviance detection in the primary visual cortex (V1) involves local inhibition and top-down modulation.
- Understanding the spatiotemporal interaction of neural circuits is crucial for visual context processing.
Approach:
- Used local field potential recordings in mice (anterior cingulate area [ACa] and V1) during a visual oddball paradigm.
- Employed two-photon imaging in V1 to observe neuronal activity, including pyramidal neurons and specific interneurons (VIPs, SSTs).
- Utilized optogenetics and chemogenetics to manipulate ACa-V1 pathway activity and assess its impact on V1 neural dynamics.
Key Points:
- Interregional synchrony between ACa and V1 peaked in the theta/alpha band (6-12 Hz) during deviance detection.
- Pyramidal neurons in V1 showed deviance detection, while VIP interneurons increased activity and SST interneurons decreased activity.
- Targeted optogenetic stimulation of ACa-V1 inputs mimicked natural deviance detection dynamics.
- Inhibiting VIP interneurons disrupted ACa-V1 synchrony and impaired deviance detection.
Conclusions:
- Identified theta/alpha band synchrony between ACa and V1 as a key mechanism for visual deviance detection.
- Demonstrated the differential roles of V1 interneurons (VIPs and SSTs) in processing contextual visual information.
- Highlighted the importance of top-down modulation via the ACa-V1 pathway, involving specific interneuron circuits, for effective visual context processing.
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