Cited by 1,847Pain Mechanisms and TreatmentsPain Management and TreatmentIon Channels and Receptors

A novel behavioral model of neuropathic pain disorders produced in rats by partial sciatic nerve injury

Seltzer, Ze'ev, Dubner, Ronald, Shir, Yoram·1990·Pain

Abstract

Partial nerve injury is the main cause of causalgiform pain disorders in humans. We present here a novel animal model of this condition. In rats we unilaterally ligated about half of the sciatic nerve high in the thigh. Within a few hours after the operation, and for several months thereafter, the rats developed guarding behavior of the ipsilateral hind paw and licked it often, suggesting the possibility of spontaneous pain. The plantar surface of the foot was evenly hyperesthetic to non-noxious and noxious stimuli. None of the rats autotomized. There was a sharp decrease in the withdrawal thresholds bilaterally in response to repetitive Von Frey hair stimulation at the plantar side. After a series of such stimuli in the operated side, light touch elicited aversive responses, suggesting allodynia to touch. The withdrawal thresholds to CO2 laser heat pulses were markedly lowered bilaterally. Suprathreshold noxious heat pulses elicited exaggerated responses unilaterally, suggesting thermal hyperalgesia. Pin-prick evoked such exaggerated responses bilaterally (mechanical hyperalgesia). In a companion report, we show that these abnormalities critically depend on the sympathetic outflow. Based on the immediate onset and long-lasting perpetuation of similar symptoms, such as touch-evoked allodynia and hyperalgesia, and the resemblance of the contralateral phenomena to 'mirror image' pains in some humans with causalgia, we suggest that this preparation may serve as a model for syndromes of the causalgiform variety that are triggered by partial nerve injury and maintained by sympathetic activity.

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Crossref · 10.1016/0304-3959(90)91074-s

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Authors
Seltzer, Z., Dubner, R., & Shir, Y.
Affiliations
  • National Institutes of Health (US)
  • Hadassah Medical Center (IL)
Corresponding author
Seltzer, Ze'ev
Venue
Pain
Published
1990-11
Volume
43
Issue
2
Pages
205-218
ISSN
0304-3959 (ISSN-L)
OpenAlex
W2067924690
Cited by
1,847
References
37
Citations by year
2026: 26 · 2025: 24 · 2024: 29 · 2023: 34 · 2022: 50 · 2021: 64 · 2020: 41 · 2019: 52 · 2018: 54 · 2017: 54 · 2016: 46 · 2015: 57 · 2014: 84 · 2013: 75 · 2012: 67
FWCI
9.41
Type
journal article
Language
en
Open access
closed
Locations
  • Pain (publishedVersion)
  • PubMed (publishedVersion)
Funders
Hebrew University of Jerusalem
Topics
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
Keywords
neuropathic pain, causalgia, animal models, allodynia, thermal hyperalgesia, mechanical hyperalgesia, withdrawal threshold, sympathetic nervous system, hyperesthesia
MeSH terms
Animals, Behavior, Animal, Causalgia, Disease Models, Animal, Gait, Hindlimb, Humans, Male, Posture, Sciatic Nerve, Touch, Foot Injuries, Rats

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