Cricothyroid Muscle Function and Vocal Fold Stability in Exercising Horses

Holcombe, Susan J.; Rodriguez, Katie M.; Lane, J. G.; Caron, John P.

doi:10.1111/j.1532-950x.2006.00182.x

Cited by 30 publications

(42 citation statements)

References 14 publications

(38 reference statements)

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“…Our results revealed a higher mean of the median cluster size in the right CT muscle of unaffected control horses, which is of unclear biological significance: the CT muscle was included in the current study as dysfunction of this muscle causes vocal fold collapse [9], which is the first abnormal event observed after inducing poll flexion in horses affected with DLC [2]. However, these findings were inconsistent with regard to DLC.…”

Section: Discussioncontrasting

confidence: 53%

Histopathological assessment of intrinsic laryngeal musculature in horses with dynamic laryngeal collapse

Fjordbakk

Revold

Goodwin

et al. 2014

Equine Veterinary Journal

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The absence of bilateral symmetric fibre type grouping, fibre type loss and fibre atrophy in the DLC-affected cases do not support a neuromuscular component within the pathogenesis of DLC. The objective assessment of fibre type grouping revealed some statistical differences between the DLC-affected cases and the unaffected controls; however, these findings were inconsistent with regard to DLC. An alternative aetiology of DLC seems likely.

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Section: Discussioncontrasting

confidence: 53%

Histopathological assessment of intrinsic laryngeal musculature in horses with dynamic laryngeal collapse

Fjordbakk

Revold

Goodwin

et al. 2014

Equine Veterinary Journal

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“…VCC occurred with increasing frequency as the resting laryngeal function grade increased from 1 to 4, and with increasing subgrades of grade 3 . VCC likely reflects reduced arytenoid abduction that would normally tense the fold and prevent its adduction into the airway, but may also reflect more specific pathology affecting the cricothyroid muscles or their innervation (Holcombe et al . 2006) or perhaps the vocalis muscle, if gross atrophy of the vocalis muscle (associated with RLN) has effects on mechanical characteristics of the vocal fold.…”

Section: Discussionmentioning

confidence: 99%

Correlation of resting and exercising endoscopic findings for horses with dynamic laryngeal collapse and palatal dysfunction

Barakzai¹,

Dixon

2010

Equine Veterinary Journal

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The results of the current study support the use of the Havemeyer system for grading laryngeal function in the resting horse, and corroborate findings of previous studies correlating resting and exercising palatal abnormalities. Studies that use the presence of spontaneous DDSP during resting endoscopic examination as an inclusion criterion for investigating efficacy of treatments for DDSP are likely to have a low proportion of horses with false positive diagnoses.

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“…This may be due to reduced tension on the vocal fold(s) caused both by incomplete abduction of the ipsilateral arytenoid and/or an absent or hypoplastic cricothyroideus muscle (Holcombe et al . ; Reesink et al . ).…”

Section: Clinical Presentation and Diagnosismentioning

confidence: 99%

Equine laryngeal dysplasia

Barakzai¹

2015

Equine Veterinary Education

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Equine 4th and 6th branchial arch defects are not uncommon in the equine population at large but can be challenging to diagnose and treat. An understanding of the anatomical structures that can be involved and how structural abnormalities may affect laryngeal function is important for clinicians faced with such cases. Diagnosis is often made using resting endoscopic examination alone but, in many cases, laryngeal ultrasound, radiography and 3-dimensional (3D) imaging techniques can be useful in confirming a diagnosis and for detecting which structures are abnormal. Exercising endoscopy is an important tool when ascertaining whether treatment is an option, for guiding treatment choice and making a prognosis for athletic function.

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Cricothyroid Muscle Function and Vocal Fold Stability in Exercising Horses

Abstract: Conditions compromising cricothyroid muscle function or motor innervation could result in vocal fold collapse.

Cited by 30 publications

References 14 publications

Histopathological assessment of intrinsic laryngeal musculature in horses with dynamic laryngeal collapse

Histopathological assessment of intrinsic laryngeal musculature in horses with dynamic laryngeal collapse

Correlation of resting and exercising endoscopic findings for horses with dynamic laryngeal collapse and palatal dysfunction

Equine laryngeal dysplasia

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