Visceral Allodynia
Visceral Allodynia - Related Videos
06:44
Demonstration of Cutaneous Allodynia in Association with Chronic Pelvic Pain
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Cited by 22 •
2009
A demonstration of the bedside test for cutaneous allodynia and its clinical implications.
06:46
Measurement of Tactile Allodynia in a Murine Model of Bacterial Prostatitis
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Cited by 23 •
2013
Infection of the prostate may be a contributing factor in mediating pelvic pain in chronic prostatitis. We describe the procedure for preparation of standardized bacterial inoculum, instillation of bacteria into the urethra of male mice and methodology for measuring tactile allodynia in mice over time.
07:44
The Spared Nerve Injury (SNI) Model of Induced Mechanical Allodynia in Mice
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Cited by 97 •
2011
The Spared Nerve Injury animal model is described here as a mouse model of peripheral neuropathic pain following partial denervation of the sciatic nerve by lesioning the tibial and common peroneal nerve branches, leaving the remaining sural nerve intact. Behavioral modification resulting from mechanical allodynia is quantified by von Frey filaments.
04:57
Controlled Reversible Visceral Arterial Ischemia, Venous Congestion and Combined Malperfusion via Midline Laparotomy in Rats
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2024
This article introduces a standardized procedure for controlled, reversible malperfusion of visceral organs in rat models. The aim is to induce these malperfusion states with a high degree of methodological certainty and control while maintaining technical simplicity and error resilience.
06:41
Electronic von Frey associated with the Mouse Grimace Scale to Assess Allodynia and Pain in Trypanosoma evansi-Infected Mice
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2024
Here, we present a protocol to evaluate nociception in mice infected with Trypanosoma evansi, using the electronic von Frey apparatus as a tool, measuring mechanical thresholds of the hind paw and viscera.
FAQs
Immune mediators released during inflammation or infection can sensitize visceral afferent nerves, making them respond more strongly to signals from internal organs. This neural change links cytokine activity and local tissue disturbances with amplified pain signaling. Consequently, ordinary intestinal movement or mild distension may generate pain-related input even when the original stimulus is not inherently damaging.
Sensitization in the spinal cord can amplify incoming signals from visceral afferent nerves, so the central nervous system processes otherwise harmless organ stimuli as painful. This provides a second level of altered sensory processing beyond local inflammation. Examining both peripheral nerve sensitization and spinal amplification helps researchers connect immune activity with the intensity of abdominal pain.
Epithelial barrier disruption is one pathway through which infection or inflammation may influence visceral sensory processing. Damage to this barrier occurs alongside cytokine release and tissue injury, creating conditions that support neuroimmune communication and afferent nerve sensitization. Studying these linked events helps explain how changes at the intestinal interface can become amplified as abdominal pain.
The key distinction is the relationship between the stimulus and the pain response. In visceral allodynia, a mechanical or chemical input that would ordinarily be tolerated becomes painful after sensory processing is altered. This makes the phenomenon useful for identifying abnormal amplification rather than simply detecting tissue damage, particularly in inflammatory or infectious settings.
Assessing visceral allodynia provides an indicator of altered sensory processing in internal organs. In immunology and infection studies, the response can be considered alongside cytokine release, tissue injury, epithelial barrier disruption, and neuroimmune signaling. This integrated view helps researchers investigate how immune and neural events correspond with abdominal pain during disease-related inflammation.
It offers a functional connection between immune responses and symptoms. Inflammation or infection can produce cytokine activity, tissue injury, and barrier disruption, while neural sensitization translates these changes into amplified visceral pain. Research on this relationship helps clarify how immune processes affect sensory systems and why abdominal pain may accompany intestinal or other internal-organ disturbances.
Findings can support treatment strategies directed at different points in the pain pathway. One approach is to reduce the inflammatory processes that promote sensitization; another is to limit neural amplification; a combined strategy may address both. This framework is relevant because visceral pain can reflect interacting immune and nervous-system mechanisms rather than a single isolated event.
These studies can reveal how cytokine release, tissue injury, epithelial barrier disruption, and neural signaling interact during inflammation or infection. The resulting evidence helps characterize altered sensory processing and identify relationships between biological changes and abdominal pain. It therefore contributes both to mechanistic understanding of neuroimmune communication and to the search for targeted interventions.