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A Salivation Abnormality with Trigeminal Nerve Dysfunction in Dogs.

Marc Kent1, Rachel B Song2, Eric N Glass2

  • 11 Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, Athens, GA, USA.

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|May 30, 2019
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Summary
This summary is machine-generated.

Trigeminal nerve dysfunction in dogs can cause abnormal saliva buildup and changes in salivary gland size and composition. This suggests parasympathetic denervation impacting oral and systemic health.

Keywords:
dogsalivasalivary gland innervationtrigeminal nerve

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Area of Science:

  • Veterinary Neurology
  • Oral Medicine
  • Salivary Gland Physiology

Background:

  • Trigeminal nerve pathology affects head structures, but its role in salivary gland innervation is less recognized.
  • Parasympathetic innervation to salivary glands travels via trigeminal nerve branches, influencing saliva production.
  • Dysfunction in this pathway can lead to reduced saliva volume and altered composition, impacting oral health.

Purpose of the Study:

  • To describe clinical observations and imaging findings in dogs with trigeminal nerve dysfunction.
  • To investigate the link between trigeminal nerve pathology and salivary gland changes.
  • To hypothesize the underlying mechanism of observed salivary abnormalities.

Main Methods:

  • Clinical case series involving dogs with unilateral or bilateral trigeminal nerve dysfunction.
  • Observation of saliva accumulation and characteristics.
  • Magnetic resonance imaging (MRI) of salivary glands to assess size and signal intensity.

Main Results:

  • Dogs exhibited thick, foamy saliva accumulation on the side of the affected trigeminal nerve.
  • MRI revealed reduced salivary gland size and increased signal intensity ipsilateral to nerve dysfunction.
  • These changes suggest impaired glandular function due to denervation.

Conclusions:

  • Trigeminal nerve dysfunction is associated with abnormal salivation and salivary gland alterations in dogs.
  • The findings support a hypothesis of parasympathetic denervation impacting salivary gland function.
  • Recognizing these clinical signs is crucial for understanding oral and systemic health implications in affected dogs.