Pig 8 Arm Radial
Eight-arm radial maze specifically designed for spatial memory and cognitive assessment in porcine subjects, featuring central octagonal arena and food reward systems.
Louise Corscadden, PhD
Director of Science · ConductScience
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The Pig 8 Arm Radial Maze is a specialized behavioral assessment apparatus designed for spatial memory and cognitive evaluation in porcine subjects. Constructed with a central octagonal area (91 cm diameter) and eight radiating arms (30 cm length × 17.8 cm width), this maze enables researchers to assess working memory, reference memory, and spatial navigation capabilities in pigs. Each arm terminates in a reward zone (35.6 cm diameter) equipped with PVC bowls and covered lids for food reward placement.
The apparatus features 50 cm high walls with 0.75 cm thickness to prevent visual cues between arms, while solid rubber flooring provides secure footing for large animal subjects. The maze accommodates both spatial and non-spatial learning paradigms, making it suitable for neuroanatomy research leveraging the similarities between porcine and human brain structure. Standard protocols include 8-day assessment periods with acquisition and reversal phases.
How It Works
The radial arm maze operates on the principle of spatial reference memory assessment through food-motivated exploration. Pigs are trained to navigate from the central starting position to locate food rewards placed in specific arm locations. The maze design eliminates intramaze cues while allowing extramaze spatial landmarks to guide navigation, requiring subjects to develop cognitive maps of the environment.
During testing, pigs demonstrate working memory by avoiding previously visited arms within a session and reference memory by consistently returning to arms that contain rewards across sessions. The 60-second trial duration and standardized starting position (Arm 2) ensure consistent testing conditions. Performance metrics include arm entry patterns, latency to reward acquisition, and error frequencies during both acquisition and reversal phases.
The maze configuration forces subjects to make spatial decisions at the central choice point, engaging hippocampal-dependent navigation systems. The eight-arm design provides sufficient complexity to challenge porcine cognitive abilities while allowing quantitative assessment of memory performance across multiple spatial locations.
Features & Benefits
number_of_arms
- 8
wall_height
- 0.5 m
wall_thickness
- 0.75 cm
central_area_diameter
- 0.91 m
arm_width
- 17.8 cm
arm_length
- 30 cm
floor_material
- solid rubber
bowl_material
- polyvinylchloride
curtain_material
- polyvinylchloride
starting_arm
- Arm 2
trial_duration
- 60 seconds maximum
assessment_duration
- 8 days
trials_per_day
- 8
acquisition_phase
- 4 consecutive days
reversal_phase
- 4 consecutive days
Behavioral Construct
- spatial memory
- working memory
- reference memory
- spatial navigation
- cognitive flexibility
Automation Level
- manual
Material
- polyvinylchloride
- rubber
Color
- Blue
- White
Species
- Pig
Research Domain
- Aging Research
- Behavioral Pharmacology
- Developmental Biology
- Learning and Memory
- Neurodegeneration
- Neuroscience
Weight
- 21.0 kg
Dimensions
- L: 43.2 mm
- W: 38.0 mm
- H: 27.9 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Number of Arms | 8 radial arms | Simple maze designs often offer 4-6 arms or linear configurations | Greater spatial complexity enables more sophisticated assessment of working memory capacity and spatial navigation strategies |
| Central Arena Size | 91 cm diameter octagonal area | Smaller central areas in rodent-scaled mazes | Accommodates porcine subject size while maintaining proper spatial decision-making requirements |
| Wall Height | 50 cm height walls | Lower walls suitable for smaller species | Prevents visual cues between arms while containing large animal subjects effectively |
| Arm Dimensions | 30 cm length × 17.8 cm width | Narrower arms designed for rodent navigation | Optimized for porcine locomotion patterns while maintaining spatial memory task validity |
| Flooring System | Solid rubber construction | Basic plastic or metal flooring | Provides secure traction for large animals and reduces noise during behavioral testing |
| Reward System | Eight PVC bowls with covered lids | Simple food wells or open containers | Standardized reward concealment ensures consistent motivational conditions across all arm locations |
This maze provides specialized dimensions and features specifically designed for porcine cognition research, addressing the unique requirements of large animal behavioral assessment. The robust construction and standardized reward systems support reliable spatial memory evaluation in translational neuroscience applications.
Practical Tips
Establish consistent extramaze spatial landmarks before beginning experiments and maintain their positions throughout testing periods.
Why: Spatial navigation relies on environmental cues that must remain stable for valid memory assessment.
Clean rubber flooring with non-slip disinfectants between subjects and inspect for wear patterns that could affect navigation.
Why: Maintained surface conditions ensure consistent traction and prevent confounding factors in behavioral performance.
Use standardized food rewards of consistent size and palatability across all trials and subjects.
Why: Motivation levels directly impact spatial learning performance and must be controlled for valid comparisons.
If subjects show arm bias or stereotyped behavior patterns, verify wall heights block visual cues and randomize reward placement.
Why: Non-spatial strategies can confound spatial memory assessment and indicate procedural issues.
Record ambient lighting conditions and maintain consistent illumination throughout testing sessions.
Why: Visual cue availability affects spatial navigation strategies and must be standardized for reliable data.
Ensure all wall connections are secure before introducing subjects and check for protruding hardware that could cause injury.
Why: Large animal subjects can generate significant forces during navigation that could compromise apparatus integrity.
Allow adequate inter-trial intervals to prevent fatigue effects that could impact spatial memory performance.
Why: Cognitive performance degrades with fatigue, potentially masking true spatial memory capabilities.
Video record sessions from multiple angles to capture complete navigation patterns and verify manual scoring accuracy.
Why: Comprehensive behavioral documentation enables detailed analysis of spatial strategies and error patterns.
Setup Guide
What’s in the Box
- Central octagonal arena (91 cm diameter)
- Eight radial arm sections (30 cm length × 17.8 cm width)
- Eight PVC reward bowls with covered lids
- Wall sections (50 cm height, 0.75 cm thickness)
- Solid rubber flooring components
- Assembly hardware and connectors
- Operating manual with standard protocols (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and construction, with technical support for setup and protocol implementation.
Compliance
What are the standard training protocols for naive pigs in this maze?
Standard protocols include 4-day acquisition phases followed by 4-day reversal phases, with 8 trials per day and 60-second maximum trial durations. Subjects typically start from Arm 2 position for consistency.
How does this maze accommodate the size differences between juvenile and adult pigs?
The 17.8 cm arm width and 91 cm central area accommodate pigs ranging from juvenile to adult sizes, though researchers should verify subject dimensions match maze specifications for optimal navigation.
What measures prevent subjects from seeing into adjacent arms?
The 50 cm wall height with 0.75 cm thickness effectively blocks visual communication between arms while allowing extramaze spatial cues to guide navigation.
How is the reward system standardized across trials?
Each arm features identical PVC bowls with lids positioned within 35.6 cm diameter reward zones, allowing consistent food placement and concealment protocols.
What maintenance is required for the rubber flooring system?
The solid rubber flooring requires regular cleaning with appropriate disinfectants between subjects and periodic inspection for wear or damage that could affect traction.
Can this maze be modified for non-spatial learning tasks?
Yes, the design accommodates both spatial and non-spatial paradigms by altering reward contingencies and cue placements according to experimental requirements.
What data collection methods are typically used with this apparatus?
Researchers typically record arm entry sequences, latency measures, error frequencies, and path efficiency using video tracking or manual observation protocols.
How does porcine performance in this maze relate to human cognitive assessment?
The similarities in porcine and human neuroanatomy, particularly hippocampal structure, make spatial memory performance in this maze relevant for translational cognitive research.
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