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Models of Visceral Nociception
1Department of Anesthesiology, University of Alabama at Birmingham, Alabama, USA.
ILAR Journal
|June 15, 2001
Summary
Validating animal models for visceral pain is crucial for understanding human pain. This study identifies reliable methods for studying visceral nociception in animals, focusing on stimuli that mimic human pain responses.
Area of Science:
- Neuroscience
- Pain Research
- Animal Models
Background:
- Visceral pain is common but poorly understood due to challenges in reliable animal modeling.
- Characterized by poor localization and non-specific autonomic changes, visceral pain requires specific stimuli for study.
Purpose of the Study:
- To define criteria for valid animal models of visceral pain.
- To evaluate existing visceral pain models based on these criteria.
Main Methods:
- Defined "noxious" visceral stimuli based on human pain, animal aversion, and analgesic effects.
- Assessed model validity by reliability, inhibition by analgesics, and lack of inhibition by non-analgesics.
- Examined models including bowel distension, ureteral calculosis, and irritant application.
Main Results:
- The writhing test was found to be an invalid model for visceral pain.
- Models involving small bowel distension, colonic-rectal distension, ureteral calculosis, urinary tract distension, and intravesical irritants met most validity criteria.
- Other models showed partial validity.
Conclusions:
- Several visceral pain models demonstrate validity for studying nociception.
- These validated models can aid in selecting appropriate tools for visceral pain research.
- The findings provide guidance for researchers in the field of pain management.