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Cross-Modal Multivariate Pattern Analysis

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Published on: November 9, 2011

Top-down input modulates visual context processing through an interneuron-specific circuit.

Georgia Bastos¹, Jacob T Holmes², Jordan M Ross³

¹Neuroscience Institute, Georgia State University, Petit Science Center, 100 Piedmont Ave, Atlanta, GA 30303, USA; Center for Neuroinflammation and Cardiometabolic Diseases, Georgia State University, Petit Science Center, 100 Piedmont Ave, Atlanta, GA 30303, USA.

|September 14, 2023

Summary

This summary is machine-generated.

The anterior cingulate area (ACa) and primary visual cortex (V1) interact via theta/alpha band synchrony to detect visual context deviations. This process involves specific interneuron pathways in V1, crucial for processing unexpected visual stimuli.

Keywords:

CP: Neuroscience cortex interneurons mismatch negativity oscillations predictive coding schizophrenia

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Area of Science:

Neuroscience
Visual Processing
Cognitive Neuroscience

Background:

Deviance detection in the primary visual cortex (V1) enhances responses to unexpected visual stimuli.
This process relies on local inhibition within V1 and top-down input from the anterior cingulate area (ACa).

Purpose of the Study:

To investigate the interaction mechanisms between the ACa and V1 in supporting visual deviance detection.
To elucidate the temporal dynamics and specific interneuron roles in top-down modulation of V1.

Main Methods:

Local field potential recordings in mice during an oddball paradigm.
Two-photon imaging in V1 to observe neuronal activity.
Optogenetic and chemogenetic manipulation of ACa-V1 inputs and V1 interneurons (VIP and SST).

Main Results:

ACa-V1 synchrony was observed in the theta/alpha frequency band (≈10 Hz) during deviance detection.
Pyramidal neurons were primarily involved in deviance detection, while VIP interneurons increased and SST interneurons decreased activity with redundant stimuli.
Optogenetic stimulation at 10 Hz mimicked these interneuron dynamics; inhibiting VIP interneurons disrupted synchrony and deviance detection.

Conclusions:

Top-down modulation from ACa to V1 occurs with specific temporal dynamics (≈10 Hz synchrony).
Vasoactive intestinal peptide (VIP)-positive interneurons play a critical role in mediating this top-down control.
These findings reveal interneuron-specific mechanisms underlying visual context processing and deviance detection.