Morris Water Maze Release Device
Standardized release device for Morris water maze testing that eliminates extraneous cues during animal placement and provides consistent trial initiation timing.
| chambers | two chambers (top and bottom) |
| floor_features | perforations |
| lid | removable top lid |
| buoyancy_design | controlled buoyancy and water inflow |
| submersion_time | 45 to 50 seconds |
| mounting | fits onto vertical rod of water maze |
The Morris Water Maze Release Device provides standardized animal placement and release for spatial learning assessments in the Morris water maze paradigm. This opaque acrylic cylinder eliminates potential extraneous cues during animal transport from housing to the maze starting position, ensuring consistent experimental conditions across trials.
The device features a two-chamber design with perforated floor and removable lid, engineered for controlled buoyancy and automatic submersion after 45-50 seconds. The unit mounts securely onto the vertical rod of standard water maze apparatus, allowing researchers to exit the testing area before animal release, thereby minimizing experimenter-induced behavioral artifacts during spatial memory testing.
How It Works
The release device operates through controlled buoyancy mechanics to provide timed animal release. The opaque cylinder contains the subject during transport, eliminating visual cues that could influence pre-trial behavior or spatial orientation. Once positioned on the maze's central mounting rod, the device's perforated floor allows controlled water inflow.
The two-chamber design creates predictable submersion timing of 45-50 seconds, during which the experimenter can exit the testing area. As water enters through floor perforations, the device gradually submerges, automatically releasing the animal at the water surface level. This mechanism ensures consistent trial initiation timing while removing human presence as a potential behavioral influence during the critical initial orientation phase of spatial learning assessment.
Features & Benefits
chambers
- two chambers (top and bottom)
floor_features
- perforations
lid
- removable top lid
buoyancy_design
- controlled buoyancy and water inflow
submersion_time
- 45 to 50 seconds
mounting
- fits onto vertical rod of water maze
Behavioral Construct
- Spatial Learning
- Spatial Memory
- Place Learning
- Navigation
- Hippocampal Function
Automation Level
- semi-automated
Material
- Acrylic
- opaque cylinder
Display Type
- None
Research Domain
- Aging Research
- Behavioral Pharmacology
- Learning and Memory
- Neurodegeneration
- Neuroscience
Species
- Mouse
- Rat
Weight
- 21.0 kg
Dimensions
- L: 43.2 mm
- W: 38.0 mm
- H: 27.9 mm
Comparison Guide
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Release Timing Control | Automated 45-50 second submersion timing | Manual release timing varies by experimenter | Eliminates human timing variability and ensures consistent trial initiation across all experimental sessions. |
| Visual Cue Elimination | Opaque acrylic construction | Clear containers or direct placement methods | Prevents spatial pre-orientation that could confound learning assessment during initial trial phases. |
| Species-Specific Design | Mouse (10 cm) and rat (15 cm) diameter options | One-size containers often too large or small | Provides optimal containment and stress reduction for different rodent species during transport and release. |
| Experimenter Presence Control | 45-50 second delay allows complete area exit | Immediate release requires researcher presence | Eliminates experimenter as potential behavioral influence during critical spatial orientation period. |
| Equipment Quantity | Pack of 2 devices included | Single unit purchases common | Enables simultaneous protocols or provides backup equipment for continuous experimental schedules. |
This release device provides automated timing control and visual cue elimination through opaque construction, with species-specific sizing for optimal animal containment. The two-chamber design with controlled buoyancy offers consistent performance across extended experimental protocols.
Practical Tips
Test submersion timing weekly with empty devices to verify consistent 45-50 second performance.
Why: Environmental factors like temperature changes can affect buoyancy characteristics over time.
Clean perforated floors thoroughly after each session to prevent algae or debris accumulation.
Why: Blocked perforations alter water inflow rates and compromise release timing consistency.
Maintain consistent handling duration from cage to device placement across all animals.
Why: Standardized pre-trial procedures minimize stress-related variables that could affect spatial learning performance.
Exit the testing area completely before device submersion begins to eliminate human presence cues.
Why: Researcher proximity during release can influence animal behavior and spatial orientation strategies.
If release timing becomes inconsistent, inspect chamber integrity and perforation condition.
Why: Cracks or damaged perforations can alter buoyancy mechanics and affect predictable submersion patterns.
Record actual release timing for each trial to identify any protocol deviations.
Why: Documentation of timing variations helps identify equipment issues and ensures data interpretation accuracy.
Monitor animal swimming ability before implementing the release protocol, especially with aged or treated subjects.
Why: Some experimental conditions may affect motor function and require protocol modifications for animal welfare.
Setup Guide
What’s in the Box
- 2 release device units (species-specific sizing)
- Opaque cylinder chambers with removable lids
- Perforated floor inserts
- Central rod mounting hardware
- User operation manual
- Protocol guidance documentation (typical)
Warranty
ConductScience provides a standard 1-year manufacturer warranty covering materials and workmanship defects, with technical support for setup and operational guidance throughout the warranty period.
Compliance
References
Background reading relevant to this product:
How does the device ensure consistent release timing across experimental sessions?
The controlled buoyancy design with perforated floor provides predictable water inflow rates, resulting in consistent 45-50 second submersion timing regardless of individual animal weight variations within species ranges.
Can the release device be used with modified Morris water maze protocols?
Yes, the device is compatible with standard central rod mounting systems and can accommodate various maze sizes and water temperatures commonly used in spatial learning protocols.
What maintenance is required for optimal device performance?
Regular cleaning of perforated floors to prevent blockage, periodic inspection of buoyancy function, and replacement of any damaged chamber components to maintain consistent submersion timing.
How does the opaque design affect animal behavior compared to transparent containers?
The opaque construction eliminates visual spatial cues during transport and positioning, reducing pre-trial orientation bias and ensuring animals begin trials without prior environmental reference information.
Is the device compatible with video tracking systems?
The automatic release mechanism allows for seamless integration with standard video tracking protocols, as the device submerges completely without interfering with overhead camera positioning.
What factors could affect the 45-50 second release timing?
Water temperature, perforation blockage, or damage to chamber integrity could alter submersion rates; regular maintenance and pre-session function checks ensure consistent timing.
Can the device accommodate juvenile or aged animals with different mobility requirements?
The gentle submersion release is suitable for animals across age ranges, though researchers should verify that subjects can swim adequately before implementing the protocol.
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