Mechanical Conflict Test
The Mechanical Conflict Test (MCT) is a behavioral neuroscience apparatus that evaluates pain-related decision making in rodents by creating a conflict between light avoidance and crossing mechanically challenging surfaces. This system is essential for neuropathic pain research and mechanical hypersensitivity studies.
Louise Corscadden, PhD
Director of Science · ConductScience
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Overview
The Mechanical Conflict Test (MCT) is a specialized behavioral neuroscience apparatus designed to evaluate pain-related decision making and nociceptive responses in rodents. This innovative system creates a controlled conflict scenario where animals must choose between remaining in an aversive brightly lit chamber or crossing a mechanically challenging surface with sharp probes to reach a preferred dark environment. The MCT is particularly valuable for studying neuropathic pain models and mechanical hypersensitivity, providing researchers with quantitative measures of pain avoidance behavior.
Key Features
The apparatus features dual 12 × 12 × 18 cm chambers connected by a 6 cm wide runway containing the critical probe section. The 15 cm probe plate contains approximately 1,000 stainless steel pins arranged in a high-density pattern (3 mm center-to-center spacing) that prevents animals from stepping between probes. This design ensures consistent mechanical stimulation across the testing surface. The system includes interchangeable probe plates offering variable protrusion heights from 0 to 5 mm, allowing researchers to adjust stimulus intensity based on experimental requirements.
Applications
The MCT serves as a comprehensive tool for pain research applications, including nociception evaluation, mechanical hypersensitivity testing, and allodynia assessment. Its primary strength lies in evaluating pain-related decision making processes, where animals must weigh the aversive nature of bright light against mechanical discomfort. This paradigm is particularly relevant for neuropathic pain models, where researchers can quantify changes in pain threshold and avoidance behavior following various interventions or treatments.
Species Compatibility
Optimized for both mouse and rat studies, the MCT accommodates the natural light-dark preference behaviors common to these species. The chamber dimensions and probe specifications are appropriately scaled for rodent locomotion patterns, ensuring reliable behavioral responses across different experimental models. The automated sensor detection system accurately tracks chamber entrances and exits, providing precise temporal measurements of conflict resolution behavior.
Features & Benefits
device_configurations
- 3 Lane and 6 Lane options
software_integrations
- Neuralynx, Ethovision Integration, SMS and Email integration
conductor_science_software
- Compatible
io_boxes_required
- No
Device Type
- Mouse 3 Lane
- Mouse 6 Lane
- Rat 3 Lane
- Rat 6 Lane
Species
- Mouse
- Rat
Compatible Tracking Software
- ConductVision
Weight
- 21.0 kg
Dimensions
- L: 43.2 mm
- W: 38.0 mm
- H: 27.9 mm
| Model | SKU | Listed price | Status | Dimensions |
|---|---|---|---|---|
| Rat 6 Lane | ME-6804 | $7,995.00 | Available | 43.2 x 38.0 x 27.9 cm |
| Rat 3 Lane | ME-6803 | $3,995.00 | Available | 43.2 x 38.0 x 27.9 cm |
| Mouse 6 Lane | ME-6802 | $6,995.00 | Available | 43.2 x 38.0 x 27.9 cm |
| Mouse 3 Lane | ME-6801 | $2,995.00 | Available | 43.2 x 38.0 x 27.9 cm |
What’s in the Box
- light chamber
- dark chamber
- probe plate with stainless steel pins
- interchangeable plates
- automated light system
- sensor detection system
- software for behavioral analysis
What probe heights are most appropriate for different pain models?
The interchangeable plates offer 0-5 mm protrusion options. Start with 0 mm for baseline measurements, then use 2-3 mm for moderate mechanical stimulation in neuropathic models. Higher protrusions (4-5 mm) may be needed for severe pain phenotypes or when assessing analgesic efficacy.
How does the high pin density affect experimental outcomes?
The approximately 1,000 pins with 3 mm center-to-center spacing prevent animals from avoiding mechanical stimulation by stepping between probes. This ensures consistent contact with the testing surface and improves data reliability compared to sparse probe arrangements.
What behavioral parameters does the MCT measure?
The sensor detection system tracks chamber entrances, exits, and time spent in each compartment. Key measurements include crossing latency, time in light vs. dark chambers, number of crossing attempts, and conflict resolution patterns over time.
How should I clean the apparatus between subjects?
The choice of construction materials (acrylic, aluminum, Delrin, or stainless steel) allows for appropriate cleaning protocols. Stainless steel components can withstand stronger disinfectants, while acrylic surfaces require gentler cleaning agents to prevent damage.
Is the MCT suitable for both acute and chronic pain studies?
Yes, the MCT is designed for both paradigms. For acute studies, use higher probe heights to elicit immediate avoidance. For chronic pain models, lower probe heights can detect hypersensitivity and allodynia that develop over time.
What is the recommended acclimation protocol?
Allow animals to explore the apparatus with 0 mm probe plates first to establish baseline preference patterns. This helps distinguish pain-induced changes from natural exploration behaviors and chamber preferences.
How does chamber size affect rodent behavior in the MCT?
The 12 × 12 × 18 cm chambers provide sufficient space for natural movement while maintaining the light-dark conflict. The dimensions are optimized for both mice and rats, ensuring appropriate scaling for different species sizes.
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