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Video-oculography in Mice
Published on: July 19, 2012
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Interocular velocity cues elicit vergence eye movements in mice
Veronica Choi1,2,3, Nicholas J Priebe2,3
1Center for Perceptual Systems, The University of Texas, Austin, Texas.
Journal of Neurophysiology
|July 31, 2020
Summary
Mice exhibit vergence eye movements, essential for depth perception, primarily driven by interocular motion cues, not spatial disparity. These movements are robust even when visual cortex pathways are altered.
Area of Science:
- Neuroscience
- Vision Science
- Comparative Biology
Background:
- Vergence eye movements enable 3D object tracking in primates by integrating binocular visual input.
- The capacity for vergence eye movements in mice and the underlying neural mechanisms remain largely unexplored.
Purpose of the Study:
- To investigate whether mice exhibit vergence eye movements.
- To identify the visual cues that elicit vergence eye movements in mice.
- To determine the neural substrates supporting mouse vergence eye movements.
Main Methods:
- Mice were presented with stereoscopic stimuli designed to evoke vergence.
- Eye movements were precisely measured to quantify vergence responses.
- Visual cortex manipulations and developmental binocularity disruptions were employed to assess neural contributions.
Main Results:
- Mice demonstrated vergence eye movements, albeit with low gain.
- Interocular motion was identified as the primary driver, while spatial disparity cues were ineffective.
- Vergence responses persisted despite visual cortex silencing and altered binocular development.
Conclusions:
- Mice possess vergence eye movements, indicating a conserved mechanism for depth perception.
- Motion comparison, rather than spatial disparity, is the key signal for mouse vergence.
- The observed robustness suggests subcortical or alternative cortical pathways mediate mouse vergence.
