Home
http://www.virbac.fr/ http://www.boehringer-ingelheim.com/ http://www.novartis.com/ http://www.animalhealth.bayerhealthcare.com/
vetcontact
Vetrinär
Tiermedizin
  WELCOME  
vetcontact
Vetrinär
Tiermedizin
  Home  
  Login / Newsletter  
vetcontact
Vetrinär
Tiermedizin
  CONTACTS  
vetcontact
Vetrinär
Tiermedizin
  Classifieds  
  New Products  
  VetCompanies  
  VetSchools  
vetcontact
Vetrinär
Tiermedizin
  PROFESSION  
vetcontact
Vetrinär
Tiermedizin
  Edutainment  
  VetAgenda  
  Presentations  
  Posters  
  ESAVS  
  Specialisation  
vetcontact
Vetrinär
Tiermedizin
  INSIGHT  
vetcontact
Vetrinär
Tiermedizin
  Congress News  
  Picture Galleries  
vetcontact
Vetrinär
Tiermedizin
  PRODUCTS  
vetcontact
Vetrinär
Tiermedizin
  Bayer  
  Boehringer Ing.  
  Novartis  
  Virbac

 
  Simply book for less...  
    

Bovine    Equine    Small Animal Practice    Swine Practice    Articles    Vetjournal    
deutsch english español polski francais
Home / WELCOME / Archiv / Equine /     
 
Cricothyroid Muscle Function and Vocal Fold Stability in Horses
Vocal fold instability and collapse sometimes occurs in horses and can cause mild to severe problems when the animals are exercised. This interesting study determines (1) if the cricothyroid muscle had respiratory-related electromyographic (EMG) activity that increased with respiratory effort and (2) if bilateral cricothyroid myotomy resulted in vocal fold instability and collapse in exercising horses.

Seven (3 EMG; 4 cricothyroid myotomy) standardbred horses were included in this experimental study.

Three horses exercised on a treadmill at speeds corresponding to the speed that produced maximum heart rate (HRmax), 75% of maximum heart rate (HR75%max), and 50% of maximum heart rate (HR50%max) for 60 seconds at each speed while EMG activity of the cricothyroid muscle and nasopharyngeal pressures were measured.

Another 4 normal horses were exercised on the treadmill at HRmax and HR75%max for 60 seconds at each speed before and after bilateral cricothyroid myotomy. Upper airway pressures were measured and videoendoscopic examinations were performed and videotaped at each speed.

Results: Peak phasic EMG activity of the cricothyroid muscle was coincident with inspiration and increased with treadmill speed. Bilateral cricothyroid myotomy resulted in vocal fold collapse in all horses.

Mean peak inspiratory pressures were significantly more negative compared with control values at both HRmax and HR75%max.

Conclusions: Cricothyroid muscle dysfunction may be implicated in vocal fold collapse and likely causes inspiratory airway obstruction in exercising horses. Conditions compromising cricothyroid muscle function or motor innervation could result in vocal fold collapse.



Source: HOLCOMBE, SUSAN J., RODRIGUEZ, KATIE, LANE, JENNIFER & CARON, JOHN P. (2006): Cricothyroid Muscle Function and Vocal Fold Stability in Exercising Horses. In: Veterinary Surgery 35 (6), 495-500.



Tell a friend   |   Print version   |   Send this article

EQUINE

Septic keratitis - associated bacteria and antibiotic susceptibilitymembers
Septic keratitis is occasionally seen in various species. The aim of this study was to evaluate the most common bacterial pathogens associated with septic keratitis in veterinary patients from Switzerland. The second objective was to analyze antibiotic susceptibility test results of the identified bacterial pathogens. The third objective was to evaluate potential breed predispositions to septic keratitis. A very interesting study with results not only important for Switzerland!

  • Traumatic coccygeal luxation and distal amputation of the tail of a horsemembers
  • Head computed tomography in equine practicemembers
  • Standing intraoral extractions of cheek teeth in horsesmembers
  • Actinobacillus capsulatus peritonitis and chyloabdomen in a horsemembers
  • Adverse effect of an intrapleural tissue plasminogen activatormembers
  • Avulsion of the proximal digital annular ligament in five horsesmembers
  • Penile and preputial squamous cell carcinoma in the horse members
  • CT diagnosis of fatigue fracture of Mt 3 in young adult horsesmembers
  • Two regimens of lidocaine infusion in horses undergoing laparotomy for colicmembers
  • Biofilms of Candida spp. from the ocular conjunctiva of horses members
  • PARR clonality testing in a horse with a solitary retropharyngeal lymphomamembers
  • New sensor design for buccal pulse oximetry in horsesmembers


  • [ Home ] [ About ] [ Contact / Request ][ Disclaimer ]

    Copyright © 2001-2016 VetContact GmbH
    All rights reserved