Allodynia
Allodynia - Related Videos
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.
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.
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.
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.
07:09
The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice
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Cited by 78 •
2014
Neuropathic pain is a consequence of a lesion or disease affecting the somatosensory system. The “cuff model” of neuropathic pain in mice consists of the implantation of a polyethylene cuff around the main branch of the sciatic nerve. Mechanical allodynia is tested using von Frey filaments.
FAQs
Allodynia can reflect either heightened responsiveness at peripheral sensory nerve endings or amplification within spinal-cord circuits. Peripheral sensitization changes how incoming signals begin, whereas central sensitization changes how those signals are processed after entering the nervous system. Distinguishing these levels helps biologists relate the sensory experience to altered neural function rather than treating all pain responses as identical.
Low-threshold mechanoreceptors normally convey input associated with gentle mechanical stimulation. In allodynia, their activity can gain access to pain pathways, so a signal that would ordinarily remain nonpainful is interpreted as painful. This relationship is important because it shows that altered pain can result from changed circuit processing and connectivity, not necessarily from a stronger external stimulus.
Nerve injury, inflammation, migraine, and other disorders can be associated with disrupted sensory processing and the development of allodynia. These contexts are useful for biological investigation because they allow researchers to examine how changes in peripheral nerve endings or spinal-cord signaling affect the interpretation of ordinary sensory input. Comparing such contexts can clarify how different disorders disturb neural function.
Assessment of allodynia helps characterize pain by documenting responses to stimuli that are normally harmless, including light touch, gentle pressure, or temperature changes. This information reveals that sensory processing has shifted and helps describe the individual's sensory profile. In research settings, such measurements also provide an outcome for evaluating whether potential treatments alter abnormal pain signaling.
In biology and neuroscience, allodynia serves as a way to investigate how neural circuits process sensory information. Researchers examine how low-threshold mechanoreceptor input becomes linked to pain pathways and whether altered signaling arises peripherally or centrally. These observations connect a measurable sensory response with changes in nervous-system function, making the phenomenon relevant to both basic and applied research.
Treatment studies can use changes in allodynia measurements to determine whether abnormal sensory processing has been reduced. Because the phenomenon reflects altered signaling in sensory nerve endings or spinal-cord pathways, its evaluation can provide information about treatment effects on pain processing rather than only on the underlying disorder. This makes it useful for comparing therapeutic outcomes in research.