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Related Experiment Videos

Right-sided laryngeal dysfunction in a horse.

N J Kannegieter1, B E Goulden, L J Anderson

  • 1Department of Veterinary Clinical Sciences, Massey University, Palmerston North, New Zealand.

New Zealand Veterinary Journal
|May 1, 1986
PubMed
Summary
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A congenital defect caused laryngeal hemiplegia in a young Thoroughbred. Abnormal cartilage shape prevented normal arytenoid movement, impacting the horse's airway.

Area of Science:

  • Veterinary Medicine
  • Equine Science
  • Anatomy

Background:

  • Laryngeal hemiplegia is a common upper airway condition in horses.
  • Right-sided laryngeal hemiplegia can significantly impair athletic performance.
  • Congenital abnormalities are a less common cause of laryngeal dysfunction.

Purpose of the Study:

  • To investigate the cause of right-sided laryngeal hemiplegia in a two-year-old Thoroughbred colt.
  • To describe the anatomical abnormalities associated with the condition.
  • To determine the origin of the laryngeal defect.

Main Methods:

  • Clinical examination including endoscopy to assess laryngeal function.
  • Post-mortem examination to investigate the laryngeal and surrounding cartilage structures.

Related Experiment Videos

  • Histopathological examination of laryngeal tissues (not detailed in abstract).

    • Main Results:

    • Endoscopic findings confirmed immobility of the right arytenoid cartilage during respiration.
    • Post-mortem examination revealed abnormal shapes of the cricoid and thyroid cartilages.
    • Absence of the right cricothyroid articulation was identified as the primary structural defect.

    Conclusions:

    • The laryngeal hemiplegia was attributed to congenital abnormalities of the cricoid and thyroid cartilages.
    • The absence of the cricothyroid articulation prevented normal arytenoid cartilage movement.
    • This case highlights congenital structural defects as a potential cause of laryngeal hemiplegia in horses.