Escape Latency
Time to locate and enter the escape hole
ConductVision · Behavioral Analysis
Barnes Maze
Track escape latency, search strategy, and head direction with automated analysis.
RodentSpatial MemoryAuto Export
ConductVision / Barnes Maze
Recording / Trial 3subject tracked
Escape Latency45.2s
Search StrategySerial
Primary Errors4
Key Parameters
Metrics automatically extracted by ConductVision.
Search Strategy
Random, serial, or direct path classification
Head Direction
Orientation relative to escape hole during exploration
Distance Traveled
Total path length per trial
Primary Errors
Visits to non-escape holes before first correct entry
Velocity
Movement speed across the maze surface
+ 11 more parameters trackedShow allHide
Primary Latency
Time to first visit to the target hole — spatial memory index
Reference Memory Errors
Visits to holes never baited across sessions
Working Memory Errors
Repeat visits to already-checked holes within a trial
Path Efficiency
Ratio of direct distance to actual distance traveled
Hole Exploration Pattern
Sequence and distribution of hole visits across the platform
Quadrant Time
Proportion of trial spent in target vs. non-target quadrants
Latency to First Move
Time from trial start to first movement away from center
Perseverative Errors
Repeated visits to a previously correct hole after reversal
Angular Deviation
Angle between initial heading and direct path to target hole
Freezing Episodes
Duration and frequency of immobility bouts on the platform
Strategy Transitions
Shift from random to serial to direct search across training days
What is the Barnes Maze?
The Barnes Maze is a dry-land spatial learning and memory test for rodents. Subjects are placed on an elevated circular platform with evenly spaced holes around the perimeter — only one leads to an escape box. The test leverages rodents' natural aversion to bright, open spaces to motivate escape behavior.
ConductVision automatically tracks the animal's position, classifies its search strategy (random, serial, or direct), and measures escape latency across training and probe trials. Heat maps and trajectory plots reveal search strategy evolution over training days.
Protocol Parameters
| Parameter | Description | Default |
|---|---|---|
| Platform Diameter | Diameter of the circular maze platform | 92 cm |
| Number of Holes | Total holes around the platform perimeter | 20 |
| Max Trial Duration | Maximum time allowed per trial before guided placement | 180 s |
| Trials per Day | Number of acquisition trials per session | 4 |
| Training Days | Number of acquisition days before probe trial | 4 |
| Probe Duration | Duration of probe trial with escape box removed | 90 s |
| Aversive Stimuli | Motivation source driving escape behavior | Light + buzzer |
| Target Zone Size | Number of holes defining the target zone (target + adjacent) | 3 holes |
| Light Intensity | Overhead illumination level on the platform | 800 lux |
| Start Chamber Duration | Time animal is held in opaque start cylinder before release | 10 s |
| Nose-Poke Criterion | Definition of a hole visit — head deflection below plane | Head deflection |
Interpreting Results
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Increased Escape Latency
Impaired spatial learning — common in Alzheimer's models (APP/PS1, 3xTg) and after hippocampal lesions.
↑
Elevated Primary Errors
Failure to form or retrieve spatial memory for the target hole location.
↓
Reduced Target Zone Time (Probe)
Weak spatial memory consolidation — animal does not preferentially search near the trained escape location.
↓
Shift from Direct to Random Strategy
Loss of hippocampal-dependent spatial strategy — may indicate neurodegeneration or drug-induced impairment.
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Increased Perseverative Errors
Cognitive inflexibility in reversal tasks — associated with prefrontal cortex dysfunction.
↑
Prolonged Freezing Episodes
Elevated anxiety or stress response on the open platform — may confound spatial memory assessment.
Research Applications
Neurodegenerative Disease
- Alzheimer's disease — spatial memory deficits without swimming stress confound
- Aging research — age-related memory decline in strains sensitive to water maze stress
- Traumatic brain injury — post-injury spatial learning with minimal motor demands
Hippocampal Function
- Hippocampal lesion studies — dorsal vs. ventral contribution to spatial navigation
- Pharmacological studies — NMDA receptor antagonists, cholinergic modulation
- Optogenetic/chemogenetic manipulation of place cells and grid cells
Genetic & Phenotyping
- High-throughput spatial memory phenotyping for mutant mouse panels
- Strain comparisons — C57BL/6 vs. 129 substrains vs. BALB/c
- Gene therapy and rescue experiments targeting spatial cognition
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