Morris Water Radial Tread
Shallow-water cognitive testing apparatus that assesses spatial learning and memory in rodents without swimming stress, featuring 9 escape holes and temperature-controlled aversive conditions.
Louise Corscadden, PhD
Neuroscience · ConductScience
Ask Louise about Morris Water Radial Tread fit, setup, configuration, or quote prep.
Already working with us? Sign in to connect this with My Scientist.
The Morris Water Radial Tread (RWT) Maze provides an alternative to traditional forced-swim paradigms for assessing spatial cognition and memory in rodents. This apparatus addresses methodological limitations of conventional water maze testing by maintaining shallow water depth (1 inch) while creating aversive conditions through temperature control (12-14°C) that motivate escape behavior without imposing swimming stress. The system features nine strategically positioned holes at 1.5 inches above the floor level, with eight serving as decoy exits (1 inch deep) and one angled safety box providing genuine escape.
The maze incorporates five distinct visual cues to support spatial navigation assessment and includes a 90-degree bent passageway design for the true exit. Available in 4, 5, and 6-foot diameter configurations, the apparatus accommodates both mice and rats across various experimental protocols. The system supports standard acquisition periods of 4 days with 3 trials per day, 180-second trial durations, and probe trials on days 5 and 12, with compatibility for Noldus Ethovision XT tracking systems for automated behavioral analysis.
How It Works
The Radial Water Tread Maze operates on the principle of escape motivation through aversive shallow water conditions rather than forced swimming. Animals navigate in 1-inch deep water maintained at 12-14°C, which provides sufficient discomfort to motivate escape behavior while allowing normal locomotion. The shallow depth eliminates the confounding effects of swimming ability, motor fatigue, and stress-induced behavioral alterations that can compromise cognitive assessment in traditional water mazes.
Spatial navigation relies on the animal's ability to form cognitive maps using five distinct visual cues positioned around the apparatus. Eight decoy exits provide 1-inch deep false escape opportunities that result in 5-second timeouts, while the single genuine safety box allows 60-second reward periods. The 90-degree bent passageway design prevents direct visual access to the safety box, requiring animals to rely on spatial memory and navigation strategies rather than simple visual guidance.
Behavioral assessment follows standardized protocols with 4-day acquisition periods comprising 3 daily trials of 180-second duration. Probe trials on days 5 and 12 evaluate memory retention by measuring search patterns and latency to locate the safety box. The system integrates with automated tracking software to quantify path efficiency, search strategies, and cognitive flexibility across testing sessions.
Features & Benefits
Feet tub
- 4 Feet
- 5 Feet
- 6 Feet
tub_size_options
- 4 Feet, 5 Feet, 6 Feet
number_of_holes
- 9
hole_elevation
- 1.5 inches above floor
decoy_exits
- 8
safety_boxes
- 1
decoy_exit_depth
- 1 inch
visual_cues
- 5 distinct images
water_depth
- 1 inch
trial_duration
- 180 seconds
safety_box_reward_time
- 60 seconds
decoy_exit_timeout
- 5 seconds
acquisition_period
- 4 days
trials_per_day
- 3
probe_trial_days
- Day 5 and Day 12
exit_angle
- 90 degrees bent passageway
Behavioral Construct
- Spatial Learning
- Spatial Memory
- Reference Memory
- Working Memory
- Cognitive Flexibility
- Navigation Strategy
Automation Level
- semi-automated
Temperature Range
- 12 to 14 degrees Celsius
Species
- Mouse
- Rat
Research Domain
- Aging Research
- Anxiety and Depression
- Behavioral Pharmacology
- Learning and Memory
- Neurodegeneration
- Neuroscience
Compatible Tracking Software
- ConductVision
Weight
- 21.0 kg
Dimensions
- L: 43.2 mm
- W: 38.0 mm
- H: 27.9 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Water Depth | 1 inch shallow water depth | Traditional water mazes require 12-18 inch depths for forced swimming | Eliminates swimming stress and motor fatigue confounds while maintaining escape motivation for pure cognitive assessment. |
| Exit Configuration | 9 total holes with 8 decoy exits and 1 safety box | Standard mazes typically offer single hidden platform or simple choice points | Provides multiple choice spatial learning paradigm that better assesses reference memory formation and spatial strategy development. |
| Temperature Control Range | 12-14°C controlled temperature | Room temperature water or limited temperature control options | Ensures consistent aversive stimulus across trials and laboratories for standardized cognitive assessment protocols. |
| Size Options | 4, 5, and 6-foot diameter configurations | Fixed diameter designs with limited size flexibility | Accommodates different species requirements and allows spatial complexity adjustment for various experimental protocols. |
| Visual Cue System | 5 distinct visual images for spatial reference | Basic geometric shapes or limited cue options | Supports robust cognitive map formation through diverse visual landmarks for enhanced spatial navigation assessment. |
| Safety Box Design | 90-degree bent passageway with 60-second reward time | Direct access escape platforms or simple exit holes | Prevents direct visual guidance to exit location, requiring spatial memory development rather than simple visual following behaviors. |
The Morris Water Radial Tread Maze provides shallow-water cognitive assessment with reduced swimming stress compared to traditional paradigms, featuring multi-choice spatial learning design with temperature-controlled aversive conditions and flexible sizing for different species requirements.
Practical Tips
Verify water temperature reaches 12-14°C before each testing session and maintain consistent temperature throughout all trials.
Why: Temperature consistency ensures standardized aversive conditions across all animals and prevents habituation effects that could compromise escape motivation.
Clean and disinfect the maze thoroughly between animal cohorts, paying special attention to the safety box area where animals spend reward time.
Why: Prevents cross-contamination and eliminates odor cues that could influence spatial navigation through non-cognitive sensory guidance.
Position visual cues at consistent heights around the room and avoid moving them during the acquisition period.
Why: Stable visual landmarks are essential for cognitive map formation and spatial reference memory development throughout the learning protocol.
If animals show persistent thigmotaxis (wall-following behavior), reduce lighting intensity or adjust visual cue prominence to encourage exploration.
Why: Excessive thigmotaxis can interfere with spatial learning assessment by preventing animals from sampling the full maze environment.
Monitor tracking system accuracy by verifying proper detection of hole entries and safety box access in preliminary test runs.
Why: Accurate automated tracking is critical for measuring latency, path efficiency, and spatial search strategies that define cognitive performance metrics.
Maintain water depth at exactly 1 inch to ensure animals can walk normally while experiencing sufficient discomfort for escape motivation.
Why: Proper depth prevents drowning risk while maintaining the shallow-water paradigm benefits over traditional forced-swimming protocols.
Allow 2-3 minutes between trials for the same animal to prevent fatigue effects and maintain consistent motivation across testing sessions.
Why: Adequate inter-trial intervals ensure each trial represents optimal cognitive performance rather than confounded results from stress or fatigue accumulation.
Test decoy exit timeout functionality before experimental sessions to ensure 5-second delays are properly enforced by tracking software.
Why: Accurate timeout enforcement is essential for the negative feedback learning component that drives spatial strategy refinement over trials.
Setup Guide
What’s in the Box
- Morris Water Radial Tread maze tub (selected diameter)
- Eight decoy exit hole covers
- Safety box with angled passageway
- Five distinct visual cue images
- Installation hardware and mounting brackets
- Protocol guide with standard testing parameters
- User manual with setup and maintenance instructions
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support for setup, calibration, and operational guidance.
Compliance
How does the shallow water paradigm compare to traditional Morris Water Maze testing for cognitive assessment?
The 1-inch water depth eliminates swimming stress and motor fatigue confounds while maintaining escape motivation through temperature control at 12-14°C. This approach reduces stress-induced behavioral artifacts and allows assessment of pure cognitive function without swimming ability as a confounding variable.
What tracking systems are compatible with the radial tread maze for automated analysis?
The system is compatible with Noldus Ethovision XT tracking software and can accommodate other video tracking systems capable of defining circular maze boundaries and multiple zone regions for automated behavioral analysis.
How should the visual cues be positioned for optimal spatial navigation assessment?
The five distinct visual cues should be mounted at consistent heights around the room perimeter to provide stable spatial reference points. Cue placement should remain constant throughout testing to support reliable cognitive map formation and reference memory assessment.
What maintenance is required for consistent temperature control during testing?
Water temperature should be monitored continuously and maintained at 12-14°C using appropriate chilling systems or the optional heated chamber accessory. Regular temperature verification ensures consistent aversive conditions across all trials and testing sessions.
How do the decoy exits function in the spatial learning paradigm?
Eight decoy exits provide 1-inch deep false escape opportunities that result in 5-second timeouts before animals can continue searching. This design reinforces spatial learning by providing negative feedback for incorrect location choices while maintaining search motivation.
What are the standard protocol parameters for acquisition and probe trials?
Standard protocols include 4-day acquisition with 3 trials per day at 180-second duration, followed by probe trials on days 5 and 12. Safety box reward time is 60 seconds, with 5-second timeouts for decoy exit entries to assess memory retention and spatial strategy development.
Which tub size should be selected for different species and experimental designs?
The 4-foot diameter accommodates mouse studies, while 5 and 6-foot diameters are suitable for rat research or when increased spatial complexity is required. Larger diameters provide greater spatial resolution for tracking fine navigation behaviors and search patterns.
How does the bent passageway design affect spatial navigation assessment?
The 90-degree bent safety box passageway prevents direct visual access to the escape location, requiring animals to develop spatial memory and navigation strategies rather than relying on simple visual guidance to locate the true exit.
Have a question about this product?
Accessories
Enhance your setup with compatible accessories
Frequently Bought Together
