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Behavioral Modulation and Molecular Definition of Wide-Field Vertical Cells in the Mouse Superior Colliculus
Xena J Relota1, Alexander Ford2, Elise L Savier3,4
1Molecular and Integrative Physiology Department, University of Michigan, Ann Arbor, Michigan 48109.
Summary
Wide-field vertical cells (WFV) in the superior colliculus (SC) respond to specific visual stimuli. Locomotion modulates looming stimulus responses, suggesting integrated sensory processing in visual behavior.
Area of Science:
- Neuroscience
- Visual processing
- Cellular biology
Background:
- The superior colliculus (SC) is a midbrain visual center involved in behavior.
- Wide-field vertical cells (WFV) are a conserved cell type within the SC.
- Understanding WFV function is crucial for comprehending visual information processing.
Purpose of the Study:
- To investigate the connectivity, visual responses, and locomotion modulation of WFV in mice.
- To clarify the molecular definition of WFV and reconcile existing data.
- To explore the role of WFV in visual behavior.
Main Methods:
- Viral strategies to trace WFV inputs and outputs.
- In vivo two-photon imaging to record WFV visual responses.
- Analysis of WFV responses to various visual stimuli and locomotion.
Main Results:
- WFV show preference for looming stimuli, small moving spots, and upward-moving visual stimuli.
- Locomotion significantly modulates WFV responses specifically to looming stimuli.
- Several WFV inputs were identified as potential modulators of these responses.
Conclusions:
- WFV integrate information from multiple brain regions.
- WFV activity is modulated by locomotion, impacting visual behavior.
- This study refines the understanding of WFV cell types and their role in visual processing.
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