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8-Arm Radial Maze
Central hub with eight equally spaced arms and removable food wells
Standard spatial working-memory configuration for baited-arm, win-shift, delay, and reference-memory protocols.
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Radial Arm Maze
$2,190.00 - $2,690.00
Eight-arm radial maze for assessing spatial working memory and reference memory in mice and rats through food-motivated foraging tasks.
Key Specifications
| 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 |
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Louise Corscadden
PhD, Neuroscience
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
8-arm radial configuration with 34cm central platform
Provides optimal spatial working memory challenge requiring tracking of multiple locations while maintaining manageable complexity for rodent subjects
Species-specific dimensions (5cm vs 10cm arm width)
Accommodates both mouse and rat testing with appropriate scaling for natural locomotion and spatial navigation behaviors
Optional guillotine door system
Enables precise temporal control over arm access for forced-choice protocols and prevention of premature entries during setup
Modular goal box system (9cm x 9cm x 10cm)
Standardizes food reward delivery location and facilitates consistent baiting procedures while containing reward presentation
Optional 6-arm configuration variant
Reduces task complexity for subjects with severe cognitive impairment or developmental studies requiring simplified spatial demands
Light cue integration option
Supports cue-guided navigation protocols and studies investigating the interaction between spatial and non-spatial memory systems
Elevated platform compatibility
Eliminates thigmotactic behavior and corner-seeking strategies that can confound spatial memory assessment in ground-level testing
Plus maze and Y-maze insert compatibility
Enables multiple behavioral paradigms within single apparatus setup for comprehensive spatial cognition assessment batteries
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 kg
Dimensions
- L: 65.0 mm
- W: 36.0 mm
- H: 27.0 mm
| 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.
Neuroscience
Evaluating spatial working memory deficits in transgenic mouse models of Alzheimer's disease and other neurodegenerative conditions by measuring arm re-entry errors and completion times.
Behavioral Pharmacology
Testing the cognitive effects of novel therapeutic compounds by comparing spatial memory performance before and after drug administration in established dosing protocols.
Learning and Memory
Investigating the neural mechanisms underlying spatial memory formation and retrieval by recording behavioral performance alongside electrophysiological or optogenetic manipulations.
Aging Research
Characterizing age-related decline in spatial cognition by comparing young and aged rodents on working memory accuracy and foraging strategy efficiency.
Neurodegeneration
Documenting progressive cognitive impairment in animal models of Huntington's disease, Parkinson's disease, and traumatic brain injury through longitudinal RAM testing.
Toxicology
Assessing neurotoxic effects of environmental contaminants or industrial chemicals on hippocampal function through spatial memory performance metrics.
Practical Tips
Calibration
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.
Maintenance
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.
Best Practices
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.
Best Practices
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.
Data Quality
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.
Troubleshooting
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.
Safety
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.
Best Practices
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
Assemble Maze Structure
Position the central platform and attach all eight arms ensuring secure connections and proper arm spacing. Verify all joints are stable and walls are properly aligned.
Install Optional Components
Mount guillotine doors at arm entrances if included, and position goal boxes at arm termini for food reward delivery. Test door operation for smooth opening and closing.
Position in Testing Room
Place maze in room center with consistent extramaze cues (posters, furniture, lighting) that will serve as spatial landmarks. Ensure adequate clearance around maze perimeter.
Establish Food Reward Protocol
Prepare appropriate food rewards (45mg pellets for rats, 20mg for mice) and establish baiting procedure for consistent reward placement at arm ends.
Conduct Habituation Session
Allow subjects to explore unbaited maze for 10-15 minutes to reduce neophobia and establish baseline exploration patterns before beginning formal testing.
Implement Testing Protocol
Begin with all eight arms baited and record arm entries, errors, and completion times according to established behavioral scoring criteria.
Maintain Consistent Conditions
Clean maze between subjects with appropriate disinfectant to eliminate odor cues while maintaining consistent environmental conditions throughout testing sessions.
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
NIH Guide for the Care and Use of Laboratory AnimalsCommonly used in behavioral research facilities subject to institutional animal care protocols and environmental enrichment requirements.
ARRIVE GuidelinesSupports standardized reporting of spatial cognition studies with consistent methodology descriptions and outcome measures.
Good Laboratory Practice (GLP)Employed in toxicology and pharmaceutical research environments requiring standardized behavioral assessment protocols and data integrity.
References
Background reading relevant to this product:
1.Herbert Schwegler et al. (1990) “Hippocampal mossy fibers and radial-maze learning in the mouse: A correlation with spatial working memory but not with non-spatial reference memory” Neuroscience doi:10.1016/0306-4522(90)90139-u
2.Jennifer Alamed et al. (2006) “Two-day radial-arm water maze learning and memory task; robust resolution of amyloid-related memory deficits in transgenic mice” Nature Protocols doi:10.1038/nprot.2006.275
3.Charles V. Vorhees et al. (2006) “Morris water maze: procedures for assessing spatial and related forms of learning and memory” Nature Protocols doi:10.1038/nprot.2006.116
4.Rudi D'Hooge et al. (2001) “Applications of the Morris water maze in the study of learning and memory” Brain Research Reviews doi:10.1016/s0165-0173(01)00067-4
Q
What is the Radial Arm Maze?
A
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.
Q
How does the Radial Arm Maze work?
A
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.
Q
What research applications use the Radial Arm Maze?
A
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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Upgrade Options
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The complete Radial Arm Maze workflow
Track arm entries
Automate arm entries, repeat entries, latency, path order, and baited-arm performance from overhead video.
ConductVision Radial Arm Maze ->Run protocol
Habituation, food restriction, baiting schedules, delay variants, and working-memory error definitions.
ConductMaze Radial Arm Maze Protocol ->Calculate errors
Free tool for working-memory errors, reference-memory errors, repeat entries, and percent-correct summaries.
Radial Arm Maze Error Calculator ->Configuration considerations
Common Radial Arm Maze setup decisions
Use these notes to scope species, cohort, tracking, and automation needs. Only verified product or support routes are linked from this section.
BuyableMouse scale
Mouse Radial Arm Maze
Scaled arm width and hub diameter for mouse cohorts
Smaller layout for mouse spatial working-memory studies where body size and turning radius affect arm choice.
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View options ->SpecialtyAutomated
Radial Maze With Gates
Optional guillotine doors, sensor logic, and camera tracking
Useful when delay periods, forced-choice phases, or high-throughput scoring require automated arm access.
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Configure tracking ->§ 1
Introduction
The Radial Arm Maze measures spatial working memory by asking animals to remember which arms they have already visited within a trial. Olton and Samuelson introduced the task to separate efficient place-based search from repeat-entry errors, making it a core assay for hippocampal and prefrontal memory systems. 1
The same apparatus can test working memory, reference memory, win-shift behavior, delayed choice, and baited-arm discrimination. That flexibility makes arm geometry, automation options, error definitions, and control rules important for interpreting repeat entries as memory failures rather than strategy or motivation effects. 1
Food motivation, odor trails, arm preference, lighting, and motor speed all change radial-arm performance. A strong protocol records entry order, latency, unvisited arms, repeat visits, and baited versus unbaited errors so the commercial apparatus supports publishable methods. 1
§ 2
Methods
2.1 Procedure
Baited-arm acquisition with entry-order scoring, memory-error classification, and optional delay probes.
Pre-test setup
- 1.Food motivation — Set the feeding schedule and reward type before training. Keep body-weight and welfare limits consistent with the approved protocol.
- 2.Maze calibration — Clean arms, verify all food wells are reachable, and confirm the central hub and arm entrances are visible to the camera.
- 3.Baiting plan — Define whether every arm is baited, only a subset is baited, or a forced-choice phase precedes free choice.
- 4.Cue control — Keep room cues stable and rotate baiting or maze orientation only when the protocol intentionally tests cue dependence.
Trial sequence
- 1.Place subject in hub — Start each trial from the central hub with all assigned arms available unless a forced-choice design is being used.
- 2.Record first entries — Score an arm when the subject crosses the entry threshold with all four paws or the protocol-defined body criterion.1
- 3.Classify repeat entries — Mark a working-memory error when the subject re-enters an arm that was already visited during the same trial.
- 4.Classify baited-arm errors — In partially baited designs, mark reference-memory errors when the subject enters an arm that is never baited in the learned rule.
- 5.End trial — End after all baited rewards are retrieved, a maximum duration is reached, or a maximum entry count is reached.
Critical methodological constraints
- Odor control. Clean arms and food wells consistently. Odor trails can turn a spatial-memory task into a scent-following task.
- Arm bias. Report persistent arm preference or side bias. A low error count can still be non-spatial if the animal uses a fixed route.
- Motivation. Low reward seeking, satiety, stress, or strain-specific feeding behavior can mimic memory impairment.
- Definition consistency. Working-memory and reference-memory errors must be defined before data collection because different labs score repeats and baited-arm rules differently.3
2.2 Measurement & Analysis
Core radial-arm endpoints for memory, strategy, and motivation checks.
Working-Memory Errors
Within-trial memory
Repeat entries into arms already visited during the same trial.1
Reference-Memory Errors
Rule memory
Entries into arms that are never baited in a partially baited design.
Percent Correct
Performance summary
Correct first choices divided by total choices, usually reported with trial duration and reward retrieval.
Latency To First Choice
Motivation and initiation
Time from placement in the hub to the first arm entry.
Entry Sequence
Search strategy
Ordered arm choices used to identify chaining, clockwise patterns, alternation, or spatial cue use.
+ Additional metrics: arms visited before first repeat, rewards retrieved, omission errors, hub dwell time, arm dwell time, trial duration, and route entropy.
2.3 working-memory error rate (analysis)
A compact within-trial error index for baited-arm spatial memory.
2.4 sample-size planning
Estimate the N per group needed to detect a literature-anchored effect at the endpoint you plan to report. Override the defaults with your own pilot numbers.
§ 3
Results
Aggregate publication data, sample apparatus output, and recent findings from the live PubMed feed.
3.1 Publication trends
PubMed volume and co-occurring behavioral methods for radial-arm memory studies.
3.2 Sample apparatus output
Representative output from an eight-arm baited spatial working-memory trial.
3.3 Recent findings (live PubMed feed)
- May 2026PMID: 42118457
STAT6-Mediated SOCS2 Alleviates Cognitive Impairments and Neuronal Damage in Alzheimer's Disease Rat Models.
Liu Y, Peng L, Li M, et al. Mol Neurobiol. 2026.
Rat AD model evaluated with 8-arm radial maze working-memory and reference-memory error scoring. Methods relevance: pre-specified error taxonomy, latency, and reward-retrieval reporting alongside hippocampal endpoints.
Disease modelWorking memoryAging - May 2026PMID: 42068626
Memory and mood-enhancing neuroprotective effects of photoactivated gold nanoparticles in a rat animal model.
Postu PA, Ionita R, Pricop DA, et al. Biomater Adv. 2026.
Radial-arm error rate paired with anxiety-like tests as part of a multi-paradigm cognitive battery. Methods relevance: cross-paradigm batteries and motivation controls reported with memory endpoints.
Cross-paradigm batteryNeuroprotectionWorking memory - Apr 2026PMID: 41856004
Metabolic insights into the 3xTg-AD Alzheimer model mice: hypothalamic-pituitary-thyroid axis and beyond.
Szabó A, Farkas S, Kádár A, et al. Psychoneuroendocrinology. 2026.
Transgenic 3xTg-AD cohorts assessed with radial-arm working-memory errors. Methods relevance: transgenic-model behavioral phenotyping and age-matched control reporting.
Transgenic modelWorking memoryAging - May 2026Source note
Radial arm maze methods continue to emphasize error taxonomy and strategy-aware scoring.
Static methods note aligned with Olton and Samuelson (1976), Dudchenko (2004), and radial-arm error-taxonomy literature.
Review radial-arm studies for pre-specified working-memory errors, reference-memory errors, reward retrieval, latency, and strategy patterns before interpreting group differences.
Methods overviewReproducibility
§ 4
Discussion
Limitations of the paradigm, methodological caveats, and current directions.
4.1 Common confounds
Variables that shift Radial Arm Maze results independent of anxiety state.
Food motivation
Reduced reward seeking or satiety increases omissions and latency without proving a memory deficit.
Odor trails
Reward odor, cleaning differences, and previous path scent can drive choices unless arm cleaning is consistent.
Chaining strategy
Animals can use a serial route instead of flexible spatial memory. Entry order should be reviewed, not only total errors.
Arm and side bias
Persistent preference for specific arms can change error counts and mask learning.
Delay design
Delay probes should be separated from acquisition because they stress retention rather than initial rule learning.
Preview exported markdown
## Radial Arm Maze — methods controls Confounds controlled in this protocol: - **Food motivation.** Reduced reward seeking or satiety increases omissions and latency without proving a memory deficit. - **Odor trails.** Reward odor, cleaning differences, and previous path scent can drive choices unless arm cleaning is consistent. - **Chaining strategy.** Animals can use a serial route instead of flexible spatial memory. Entry order should be reviewed, not only total errors. - **Arm and side bias.** Persistent preference for specific arms can change error counts and mask learning. - **Delay design.** Delay probes should be separated from acquisition because they stress retention rather than initial rule learning.
4.2 Construct validity caveats
Radial Arm Maze is strongest when the error taxonomy is pre-specified. A repeat entry, an unbaited-arm visit, an omitted baited arm, and a long latency are different behavioral failures and should not be collapsed into one memory label. 1
4.3 Special considerations
When should I use T Maze instead?
Use T Maze when the experiment needs a simpler forced-choice, alternation, or reward-discrimination setup with fewer spatial locations and faster daily throughput.
Is an eight-arm layout required?
Eight arms are standard because they provide enough choices for repeat-entry scoring, but four-arm and twelve-arm designs can be justified for species, task load, or automation constraints.
Should I report latency?
Yes. Latency and reward retrieval help separate memory errors from motivation, locomotor, and anxiety-like behavior.
4.4 Current directions
Quarterly editorial review of emerging Radial Arm Maze methodology. Q2 2026
Methods
Strategy-aware scoring
Entry-sequence classification is increasingly important because total error counts miss serial chaining and arm-bias patterns.
Emerging
Automated gates
Gate-controlled variants make delay periods, forced-choice phases, and reproducible trial timing easier to run.
Methods
Motivation controls
Food restriction, reward preference, and body-weight tracking should be reported with memory endpoints.
Emerging
Cross-paradigm memory batteries
Radial Arm Maze is often paired with MWM, Barnes Maze, and Y Maze to triangulate spatial learning under different stress and motor loads.
§ 5
References
10 selected methods and validation references for Radial Arm Maze.
- Olton DS, Samuelson RJ. Remembrance of places passed: spatial memory in rats. J Exp Psychol Anim Behav Process. 1976;2(2):97-116. doi:10.1037/0097-7403.2.2.97Cited 1,842×
- Olton DS, Becker JT, Handelmann GE. Hippocampus, space, and memory. Behav Brain Sci. 1979;2(3):313-322. doi:10.1017/s0140525x00062713Cited 2,035×
- Jarrard LE. On the role of the hippocampus in learning and memory in the rat. Behav Neural Biol. 1993;60(1):9-26. doi:10.1016/0163-1047(93)90664-4Cited 1,140×
- Dudchenko PA. An overview of the tasks used to test working memory in rodents. Neurosci Biobehav Rev. 2004;28(7):699-709. doi:10.1016/j.neubiorev.2004.09.002Cited 460×
- Sharma S, Rakoczy S, Brown-Borg H. Assessment of spatial memory in mice. Life Sci. 2010;87(17-18):521-536. doi:10.1016/j.lfs.2010.09.004Cited 360×
- Olton DS, Collison C, Werz MA. Spatial memory and radial arm maze performance of rats. Learn Motiv. 1977;8(3):289-314. doi:10.1016/0023-9690(77)90054-6Cited 399×
- Packard MG, McGaugh JL. Inactivation of hippocampus or caudate nucleus with lidocaine differentially affects expression of place and response learning. Neurobiol Learn Mem. 1996;65(1):65-72. doi:10.1006/nlme.1996.0007Cited 1,512×
- Hodges H. Maze procedures: the radial-arm and water maze compared. Brain Res Cogn Brain Res. 1996;3(3-4):167-181. doi:10.1016/0926-6410(96)00004-3Cited 442×
- Levin ED. Nicotinic systems and cognitive function. Psychopharmacology (Berl). 1992;108(4):417-431. doi:10.1007/bf02247415Cited 515×
- Floresco SB, Seamans JK, Phillips AG. Selective roles for hippocampal, prefrontal cortical, and ventral striatal circuits in radial-arm maze tasks. J Neurosci. 1997;17(5):1880-1890. doi:10.1523/jneurosci.17-05-01880.1997Cited 748×
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