Panlab Morris Water Maze System

Overview

The Panlab Morris Water Maze System is a rigorously engineered behavioral phenotyping platform designed for spatial learning and memory assessment in rodent models. Based on the classical Morris water maze paradigm—first established in 1981—it operates on the principle that rodents, when placed in an opaque water pool, will rapidly learn and remember the location of a submerged escape platform using distal visual cues. The system leverages ethologically valid aversion (mild thermal stress and water immersion) to motivate navigation without food or electric shock reinforcement, ensuring high translational relevance to hippocampal-dependent cognitive function. Its modular architecture integrates fluid dynamics, thermal regulation, and precise environmental control into a single cohesive unit, enabling reproducible acquisition, reversal, and probe trial protocols under standardized conditions compliant with GLP-aligned preclinical research frameworks.

Key Features

• Polypropylene circular pool (standard diameter: 120–180 cm, depth: 60 cm) with UV-stabilized, non-porous surface for consistent opacity and easy decontamination between trials.
• Integrated thermostatic control system maintaining water temperature within ±0.3 °C across the 22–32 °C operational range—critical for minimizing thermal stress-induced locomotor confounds and ensuring inter-session stability.
• Dual-platform configuration: Interchangeable acrylic platforms (Ø80 mm and Ø110 mm), both fully submersible and positionable at any coordinate via calibrated grid markings on the pool base.
• Automated liquid-level management: Electromechanical solenoid valve linked to a capacitive level sensor ensures repeatable fill volume (±2 mm tolerance) and eliminates manual calibration drift during multi-day testing.
• Low-noise, corrosion-resistant submersible pump (flow rate: ~15 L/min) with integrated filtration to maintain water clarity and prevent algae accumulation over extended use cycles.
• Dual independent fuse protection (main power + pump/thermostat circuit) meeting IEC 61000-4-5 surge immunity standards and supporting continuous 72-hour unattended operation.
• Four industrial-grade swivel casters with mechanical locking brakes—enabling safe relocation within vivarium corridors while preserving alignment integrity of external tracking camera mounts.

Sample Compatibility & Compliance

The system supports C57BL/6, BALB/c, Sprague-Dawley, and Wistar rats and mice across standard weight ranges (18–45 g for mice; 200–500 g for rats). Platform height is adjustable to ensure 1–2 cm submersion depth relative to animal snout height, minimizing swimming fatigue while preserving task validity. All materials comply with ISO 10993-5 (cytotoxicity) and EU Regulation (EC) No 1935/2004 for indirect food contact—ensuring biocompatibility during chronic exposure scenarios. The design adheres to NIH OLAW and AAALAC International guidelines for humane endpoint definition, including mandatory dry-warm recovery stations and real-time monitoring integration readiness.

Software & Data Management

The maze is compatible with Panlab’s SMART v3.0 video-tracking suite (sold separately), which supports automated latency-to-platform, path efficiency ratio, quadrant occupancy time, thigmotaxis index, and swim speed quantification. Data export conforms to CSV and HDF5 formats for downstream analysis in MATLAB, R, or Python-based neuroinformatics pipelines. Audit trails, user access logs, and electronic signature support align with FDA 21 CFR Part 11 requirements when deployed in regulated toxicology or CNS drug development studies.

Applications

• Evaluation of hippocampal lesion effects on spatial reference memory acquisition and retention.
• Pharmacological screening of NMDA receptor modulators, cholinesterase inhibitors, and neuroprotective agents in AD/PD models.
• Genetic phenotype characterization (e.g., APP/PS1, Tau P301L, BACE1-KO lines).
• Environmental enrichment or chronic stress intervention studies assessing cognitive resilience.
• Validation of functional MRI or electrophysiological correlates during active navigation tasks.

FAQ

Is the water maze compatible with third-party tracking systems such as EthoVision XT or ANY-maze?
Yes—Panlab provides standardized API documentation and hardware synchronization ports (TTL trigger input/output) for seamless integration with major commercial and open-source tracking platforms.
Can the system be adapted for non-rodent species, such as zebrafish or tree shrews?
Custom configurations—including scaled-down pools, alternative platform geometries, and modified lighting protocols—are available upon technical consultation and feasibility review.
What maintenance schedule is recommended for long-term reliability?
Monthly inspection of valve seals and pump impeller clearance; quarterly calibration of temperature and level sensors using NIST-traceable references; annual replacement of consumable gaskets and filter media.
Does Panlab offer validation documentation for IQ/OQ/PQ protocols?
Comprehensive URS, FAT/SAT reports, and GAMP 5-aligned validation templates are provided for GxP-regulated laboratories upon request and execution of appropriate service agreements.