Y-Maze Test in Zebrafish
Scientific Overview
The Y-Maze is a spatial working memory assay derived from rodent paradigms developed in the 1950s–1960s. In zebrafish, it measures spontaneous alternation behavior and spatial exploration patterns.
1. Historical Background
Adapted to zebrafish in the early 2000s.
Key references:
- Cognato et al., 2012 — DOI: 10.1016/j.bbr.2012.03.006
- Aoki et al., 2015 — DOI: 10.1038/srep13322
2. Neurobiological Basis
- Dorsal pallium (hippocampal homologue)
- Dopaminergic modulation
- Glutamatergic plasticity
- Cholinergic signaling
3. Objectives
- Working memory
- Cognitive flexibility
- Spatial discrimination
- Stress-induced cognitive deficits
4. Standardized Methodology
Apparatus
- Three identical arms (25 × 8 cm)
- 120° angle configuration
- Opaque walls
Protocol
- Single 8-minute trial
- Free exploration
Parameters
- Spontaneous alternation %
- Number of entries
- Arm sequence patterns
- Latency
5. Statistical Analysis
- Alternation calculation:
% Alternation = (Actual alternations / Possible alternations) × 100 - ANOVA
- Mixed-effects modeling
6. Applications
- Alzheimer-like models
- Chronic stress models
- Heavy metal neurotoxicity
- Cognitive drug screening
7. Limitations
- Locomotor confounding
- Lighting sensitivity
- Stress variability
8. OECD Context
Potential cognitive endpoint within Developmental Neurotoxicity (DNT) frameworks.
Complementary to TG 236 and TG 210.
9. References
- Cognato et al., 2012. DOI: 10.1016/j.bbr.2012.03.006
- Aoki et al., 2015. DOI: 10.1038/srep13322