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Using Looming Visual Stimuli to Evaluate Mouse Vision
Published on: June 13, 2019
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Attention separates sensory and motor signals in the mouse visual cortex
Mohammad Abdolrahmani1, Dmitry R Lyamzin1, Ryo Aoki1
1RIKEN Center for Brain Science, Wako-shi, Saitama 351-0198, Japan.
Cell Reports
|July 14, 2021
Summary
Neural networks in the brain integrate visual and motor signals for behavior. Sustained attention enhances these signals, improving visual discrimination and guiding actions.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Systems Neuroscience
Background:
- Visually guided behaviors rely on cortical networks processing visual input.
- Non-retinal inputs (motor, cognitive, attentional) also modulate these networks.
- Integration of coincident signals for reliable visual behaviors remains unclear.
Purpose of the Study:
- Investigate neural signal integration in the dorsal-parietal cortex during a visual discrimination task.
- Understand how visual and motor signals interact and are modulated by attention.
Main Methods:
- Recorded neural responses in the dorsal-parietal cortex of mice.
- Utilized a visual discrimination task involving visual stimuli and movements.
Main Results:
- Observed interaction between visual and motor signals via divisive normalization and response separation.
- Found that sustained attention amplifies visual and motor signals.
- Demonstrated increased signal discriminability in a low-dimensional neural activation space due to attention.
Conclusions:
- Dorsal-parietal networks employ computational principles for signal separation.
- These mechanisms enable reliable visually guided behaviors during environmental interactions.
- Attentional states play a crucial role in modulating neural signal integration.
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