Spontaneous Alternation (%)
Percentage of consecutive triads visiting all three arms
ConductVision · Behavioral Analysis
Automated Y-Maze
Automated spontaneous alternation tracking for spatial working memory.
RodentWorking MemoryAuto Export
ConductVision / Automated Y-Maze
Recording / Trial 3subject tracked
Novel Arm Time42%
Alternation71%
Total Entries18
Key Parameters
Metrics automatically extracted by ConductVision.
Total Arm Entries
Number of arm visits reflecting locomotor activity
Novel Arm Time
Duration in the previously blocked arm during retention
Novel Arm Entries
Number of entries into the previously blocked arm
Arm Dwell Time
Duration per arm revealing spatial preferences
Distance Traveled
Cumulative path length through all arms
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Same Arm Returns
Consecutive re-entries into the same arm
Alternation Triplets
Count of overlapping triads meeting alternation criteria
First Arm Choice
Which arm is entered first — novel vs familiar
Arm Preference
Visit proportion per arm detecting spatial bias
Velocity
Mean movement speed across maze arms
What is the Automated Y-Maze?
The Automated Y-Maze evaluates spatial working memory by allowing a rodent to freely explore three symmetrical arms. Healthy animals exhibit spontaneous alternation — preferring to visit a new arm on each choice — reflecting intact hippocampal-prefrontal working memory circuits.
ConductVision provides fully automated arm entry detection via optical sensors operating below 10 dB for stress-free testing. The software calculates alternation percentage, total entries, and sequential choice patterns in real time.
Protocol Parameters
| Parameter | Description | Default |
|---|---|---|
| Arm Length | Length of each arm | 35 cm (mouse) / 50 cm (rat) |
| Arm Width | Width of each arm | 5 cm (mouse) / 10 cm (rat) |
| Wall Height | Opaque arm walls | 12 cm (mouse) / 20 cm (rat) |
| Arm Angle | Angle between arms | 120° |
| Sensor Type | Automated arm entry detection | IR beam array (< 10 dB) |
| Test Duration | Spontaneous alternation session | 5–8 min |
| Novel Arm Delay | Retention interval for two-trial protocol | 1–4 h |
| Arm Entry Definition | Sensor trigger criterion | Full body in arm |
| Minimum Entries | Required entries for valid alternation | ≥ 10 |
| Light Intensity | Overhead illumination | 200–300 lux |
| Cleaning | Maze cleaning between subjects | 70% ethanol |
Interpreting Results
↓
Decreased Alternation %
Spatial working memory deficit — below chance (50%) seen in Alzheimer's models (APP/PS1) and after scopolamine treatment.
↓
Reduced Novel Arm Time
Impaired spatial recognition — failure to preferentially explore the previously blocked arm indicates memory consolidation deficit.
↑
Elevated Same Arm Returns
Perseveration — repeated entries without alternation suggest prefrontal dysfunction or spatial working memory failure.
↓
Reduced Total Entries
Hypolocomotion confound — fewer entries reduce statistical power; minimum 10 entries required for valid alternation scoring.
↑
Increased Velocity
Hyperlocomotion — may indicate psychostimulant effect or anxiety-driven movement rather than cognitive engagement.
↓
Impaired First Arm Choice
Failed novelty detection — in two-trial protocol, failure to choose the novel arm first indicates recognition memory deficit.
Research Applications
Cognitive Screening
- High-throughput memory screening — sensor-based detection eliminates manual scoring variability
- Scopolamine challenge — automated working memory impairment and rescue protocols
- Age-related decline — longitudinal alternation tracking with minimal handling stress
Neurodegeneration
- Alzheimer's models — early alternation deficits before spatial navigation impairment
- Tauopathy — progressive working memory decline in PS19 tau transgenic mice
- Drug efficacy — donepezil, memantine, and novel therapeutic rescue of alternation deficit
Spatial Novelty & Memory
- Two-trial novel arm — hippocampus-dependent spatial recognition memory
- Delay-dependent forgetting — retention interval manipulation (1 h vs 4 h vs 24 h)
- Strain phenotyping — baseline alternation profiles across inbred mouse panels
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