ISSN 2398-2969      

Fibular (peroneal) neuropathy

icanis
Contributor(s):

Introduction

  • Cause:
    • Nerve trauma, eg pressure, orthopedic injury, iatrogenic injury as a result of surgery or dressings.
    • Congenital and peroneal neuropathy in unweaned Walker Hound puppies.
    • Peripheral nerve neoplasia.
  • Signs: unable to flex hock or extend digits, straight limb, walks on dorsum of toes.
  • Diagnosis: signs.
  • Treatment: physiotherapy, electrophysiology - EMG, nerve conduction studies.
  • Prognosis: depends on degree of damage.

Pathogenesis

Etiology

  • Trauma (traction, contusion, compression), eg laceration, fracture of tibia - the peroneal nerve is subject to injury where it crosses the lateral aspect of the stifle.
  • Neoplasia.
  • Iatrogenic, eg surgical procedures, tight dressings or tourniquets.

Pathophysiology

  • Nerve trauma → disrupted neural elements → interrupted spinal reflexes → decreased muscle tone → decreased function of hock flexors and digit extensors + decreased skin sensation on anterior aspect of paw → unopposed hock extension → leg held straight → neurogenic muscle atrophy of cranial tibial muscle and long digital extensor muscles.

Timecourse

  • Immediately after injury - loss of function.
  • 7-10 days after injury - beginning of muscle atrophy.
  • Slowly progressive if peripheral nerve tumor.

Diagnosis

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Treatment

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Prevention

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Bailey C S et al (1987) Cutaneous sensory testing in the dog. J Vet Intern Med 1 (3), 128-135 PubMed.
  • Bennet D et al (1976) Peroneal nerve paralysis in the cat and dog - an experimental study. JSAP 17 (8), 499-506 PubMed.

Other sources of information

  • Summers B A (1995)diseases of the peripheral nervous system.In:Veterinary Neuropathology.Mosby. pp 402-501.
  • Braund K G (1994)Clinical syndromes in veterinary neurology.Mosby. pp 277-279.

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Nerve trauma neuropathy

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