Radial Arm Maze
Eight-arm radial maze for assessing spatial working memory and reference memory in mice and rats through food-motivated foraging tasks.
| maze_configuration | 8 arms (6 arm variant available) |
| central_platform_width | 34 cm |
| goal_box_dimensions_mouse | 9cm x 9cm x 10cm |
| goal_box_dimensions_rat | 9cm x 9cm x 10cm |
| goal_box_cost | $250 |
| light_cues_cost | $150 |
The Radial Arm Maze (RAM) is a standardized behavioral apparatus designed for assessing spatial working memory and reference memory in rodents. The traditional eight-arm configuration presents subjects with a central platform from which eight arms radiate outward, each potentially containing food rewards at the distal end. Animals must utilize spatial working memory to track previously visited arms and avoid re-entries while foraging efficiently.
The maze relies on the subject's ability to encode spatial relationships between arms using extramaze and intramaze cues present in the testing environment. This paradigm has proven particularly valuable for investigating hippocampal-dependent spatial memory processes and has been extensively validated in studies of neurodegenerative disease models, brain injury, and pharmacological interventions affecting cognition.
How It Works
The Radial Arm Maze exploits the natural foraging behavior of rodents while requiring spatial working memory to achieve optimal performance. In the standard protocol, each of the eight arms is baited with food reward at the distal end. The subject begins from the central platform and must visit each arm once to collect all rewards while avoiding re-entries to previously visited arms.
Successful performance requires encoding the spatial location of each arm relative to extramaze visual cues (room landmarks, experimenter position) and potentially intramaze cues (texture, odor, local visual markers). Working memory errors occur when subjects re-enter previously visited arms within the same trial, while reference memory errors occur when subjects consistently enter never-baited arms across multiple sessions in partial-baiting protocols.
The task engages the hippocampal formation for spatial mapping and working memory, while prefrontal cortical areas contribute to strategic planning and error monitoring. Performance metrics include total errors, working memory errors, reference memory errors, trial completion time, and foraging strategy analysis.
Features & Benefits
maze_configuration
- 8 arms (6 arm variant available)
central_platform_width
- 34 cm
goal_box_dimensions_mouse
- 9cm x 9cm x 10cm
goal_box_dimensions_rat
- 9cm x 9cm x 10cm
goal_box_cost
- $250
light_cues_cost
- $150
6_arm_maze_cost_mouse
- $1690
6_arm_maze_cost_rat
- $1790
waterproofing_cost
- $400
plus_maze_insert_cost
- $500
y_maze_insert_cost
- $350
elevated_stand_cost
- $500
primary_use
- spatial learning and memory testing
food_reward_system
- food rewards at arm ends
Behavioral Construct
- spatial working memory
- spatial reference memory
- foraging behavior
- spatial navigation
- hippocampal function
Automation Level
- manual
Research Domain
- Aging Research
- Behavioral Pharmacology
- Learning and Memory
- Neurodegeneration
- Neuroscience
- Toxicology
Species
- Mouse
- Rat
Weight
- 6.06 lbs
Dimensions
- L: 65.0 in
- W: 36.0 in
- H: 27.0 in
Comparison Guide
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Arm Configuration | Standard 8-arm design with optional 6-arm variant | Fixed configurations typically offer fewer customization options | Allows researchers to match task complexity to subject cognitive capacity and experimental requirements |
| Species Compatibility | Dedicated mouse (5cm width) and rat (10cm width) configurations | Single-size designs may compromise performance for one species | Optimizes arm dimensions for natural locomotion patterns and spatial scaling appropriate for each species |
| Central Platform Size | 34cm diameter central platform | Smaller platforms may limit movement flexibility | Provides adequate space for natural orientation behaviors and decision-making processes during arm selection |
| Modular Components | Optional guillotine doors, goal boxes, light cues, and maze inserts | Basic models often lack protocol customization options | Enables multiple behavioral paradigms and experimental protocols within a single apparatus investment |
| Wall Height Design | Species-specific heights (10cm mice, 20cm rats) | Uniform wall heights may be inappropriate for species differences | Prevents escape while maintaining visual access to extramaze cues essential for spatial navigation |
This radial arm maze system offers comprehensive spatial memory assessment capabilities through species-optimized dimensions, modular protocol components, and standardized construction suitable for multi-paradigm behavioral studies. The eight-arm configuration with optional six-arm variant provides flexibility for different cognitive capacity requirements while maintaining established protocol compatibility.
Practical Tips
Verify arm alignment using a protractor to ensure 45-degree spacing between arms, and measure arm lengths to confirm species-appropriate dimensions.
Why: Consistent spatial geometry ensures reliable spatial encoding and prevents systematic biases in arm selection patterns.
Inspect and tighten all connection joints monthly, checking for warping or damage that could affect structural integrity.
Why: Maze movement during testing can disrupt spatial cue relationships and compromise data validity.
Establish a standardized room setup with fixed extramaze cues and document their positions for consistent replication across sessions.
Why: Spatial memory performance depends critically on stable environmental landmarks for accurate navigation.
Record ambient lighting conditions and time of day for each session to control for circadian effects on cognitive performance.
Why: Both lighting levels and circadian phase can significantly influence spatial learning and memory consolidation processes.
Define clear criteria for arm entry (e.g., all four paws past the threshold) and train observers to consistent scoring standards.
Why: Standardized entry criteria prevent scoring variability that can obscure treatment effects and reduce statistical power.
If subjects show persistent side biases, rotate the maze orientation randomly across trials or block maze access until proper baiting is complete.
Why: Side preferences can mask spatial memory deficits and lead to ceiling or floor effects in performance measures.
Ensure maze height is appropriate for the testing surface to prevent injury from falls, especially when using elevated platform configurations.
Why: Subject injury can compromise both animal welfare and experimental validity through stress-related performance changes.
Allow 15-20 minute intervals between subjects for thorough cleaning and to prevent residual arousal or stress effects from affecting subsequent animals.
Why: Adequate inter-subject intervals prevent carry-over effects and ensure each animal begins testing under equivalent conditions.
Setup Guide
What’s in the Box
- Central platform (34cm diameter)
- Eight radial arms with walls (species-specific dimensions)
- Assembly hardware and connectors
- Setup and protocol manual
- Calibration measurement tools (typical)
Warranty
ConductScience provides a one-year manufacturer warranty covering defects in materials and workmanship, with technical support available for protocol optimization and troubleshooting.
Compliance
References
Background reading relevant to this product:
What is the Radial Arm Maze?
The Radial Arm Maze is a behavioral apparatus with multiple arms (typically 8) radiating from a central platform, used to assess spatial reference and working memory in rodents through food-reward paradigms.
How does the Radial Arm Maze work?
Food rewards are placed at the end of selected arms. Rodents must remember which arms contain rewards (reference memory) and which arms they have already visited (working memory). Errors of both types are quantified across trials.
What research applications use the Radial Arm Maze?
The Radial Arm Maze dissociates reference from working memory, making it valuable in Alzheimer's research, cholinergic system studies, and assessment of hippocampal and prefrontal cortex function.
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