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Updated: Jun 16, 2026
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Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
Published on: February 8, 2020
Circuit dynamics of binocular conflict in mouse primary visual cortex
Daniel P Montgomery1,2,3, Daniel A Bowen2,4, Jin Wu5
1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States.
Frontiers in Systems Neuroscience
|June 15, 2026
Summary
Different binocular disparities engage distinct neural circuits in the mouse visual cortex. Phase disparities decrease early neural firing, while orientation disparities increase later firing by suppressing specific interneurons.
Area of Science:
- Neuroscience
- Vision Science
- Computational Neuroscience
Background:
- Binocular vision integrates visual input from both eyes for unified perception.
- Interocular differences are crucial for depth perception (stereopsis) but can lead to diplopia or binocular rivalry when large.
- Neural mechanisms processing concordant versus conflicting binocular signals in early visual circuits are not fully understood.
Purpose of the Study:
- To investigate how distinct forms of binocular disparity engage local circuits in the mouse primary visual cortex (bV1).
- To differentiate the neural processing of interocular phase disparities versus orientation disparities.
Main Methods:
- Utilized visually evoked potentials (VEPs) to measure overall brain response.
- Employed unit recordings to capture individual neuron activity.
- Used 2-photon calcium imaging to visualize neural activity in specific cell types within bV1.
Main Results:
- Interocular phase disparities reduced VEP magnitude by decreasing early neuronal firing (40-80 ms).
- Orientation disparities also reduced VEP magnitude, but through increased neuronal firing later in the response (100-200 ms).
- Late firing increases during orientation disparity were observed in excitatory and fast-spiking inhibitory neurons, while somatostatin-positive interneurons were suppressed.
Conclusions:
- Phase disparities suppress bV1 responses via feedforward mechanisms.
- Orientation disparities prolong activity through suppression of somatostatin-positive interneurons.
- Revealed cell-type specific circuit mechanisms underlying different forms of binocular conflict and perceptual suppression.
