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Looming visual stimulation
Simulates expanding overhead shadow threats — eliciting innate fear and defensive responses.
Instinctive Behavior
Mouse Looming Innate Fear System
Visual Stimulus · Defense Assessment
Designed specifically for innate fear responses in mice — precise detection and quantification of escape, freezing, and other innate fear behaviors under looming visual stimulation. Automatically analyzes freezing, locomotion speed, trajectories, and more — supporting research on neural circuits of innate fear, sensory information processing, and defensive decision-making. Important value in behavioral phenotyping for anxiety disorder and PTSD models.
Looming
Visual stimulus
AI
Behavior ID
Freeze
Freeze quant
Innate Fear Stimulating
Features
Looming paradigm at the core — converting innate defensive responses into reproducible, quantifiable behavioral readouts.
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Multi-metric automatic analysis
Simultaneous quantification of freezing, escape, speed, and trajectories — key defense dimensions.
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Neural circuit mechanism research
High temporal-resolution behavior data combinable with electrophysiology and calcium imaging for fear circuit parsing.
Visual Stimulus
Standardized looming stimulus parameters — comparable, reproducible defensive responses across experiments and batches.
Expanding shadow stimulus
Top-down expanding circular/elliptical shadow simulating approaching predator.
Stimulus timing control
Configurable onset, duration, and inter-stimulus interval — habituation and repeated-elicitation paradigms.
Intensity gradient adjustment
Adjust expansion speed and contrast — study threat intensity effects on defense strategy.
Behavior-stimulus synchronization
Precise alignment of stimulus events and behavioral responses — latency and phase-locked analysis.
Safe-zone control design
Shelter/no-shelter control conditions — parsing escape direction and shelter-seeking.
Stimulus log export
Full log of each looming event — joint replay with behavior traces.
Defense Assessment
Precise identification of looming-evoked freezing, escape, and innate defense — multi-dimensional quantitative metrics.
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Freezing behavior analysis
Automatic detection of freeze episode onset/offset, duration, proportion, and bout frequency.
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Escape response detection
Detects oriented escape, acceleration, and shelter approach after stimulation.
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Locomotion speed & trajectory
Full-session speed curves and spatial trajectories — pre/post-threat locomotion changes.
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Defensive decision metrics
Freeze-escape switch latency, response-type ratios, and other decision-related readouts.
Applications
Supporting innate fear neuroscience, sensory processing, and anxiety/PTSD disease model assessment.
Innate fear neural circuits
Behavioral phenotypes for visual threat pathways and colliculo-amygdalar circuit validation.
Sensory information processing
Study looming visual encoding, integration, and transformation to motor output.
Anxiety disorder models
Quantify abnormal defense and habituation deficits in anxiety model mice under threat.
PTSD & trauma stress
Assess freeze/escape pattern changes in trauma-stress models under repeated looming.
Specifications
Standard hardware/software solution for mouse looming innate fear experiments.
SubjectsMice · innate fear behavior
ParadigmLooming visual · expanding shadow
MetricsFreezing · escape · speed · trajectory · decision latency
ResearchNeural circuits · sensory processing · anxiety/PTSD models
DeploymentOn-site install · paradigm training · analysis support
Book Looming Innate Fear System Demo
Contact us for looming stimulus setup, defense behavior metrics, and experiment design.