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Created page with "*In Horses: *Unilateral paralysis of arytenoids *Common 2-13% training thoroughbreds *Damaged/ dysfunctional recurrent laryngel nerve (branch of vagus) *Mostly left side affected..."
*In Horses:
*Unilateral paralysis of arytenoids
*Common 2-13% training thoroughbreds
*Damaged/ dysfunctional recurrent laryngel nerve (branch of vagus)
*Mostly left side affected, occasionally also the right nerve
*Demyelination of nerve fibres, and leading to atrophy of intrinsic laryngeal muscles particularly the adductor (cricoarytenoid) which allows the left arytenoid cartilage to lean into the laryngeal lumen
*The 'roaring' is noticeable after exercising
*The aetiology is not properly established but suggested factors are:
**Length of the left recurrent nerve
**Extension neuritis in [[Guttural Pouch Mycosis|guttural pouch mycosis]]
**Neurotoxins - organophosphorus compounds may produce similar degenerative changes in the nerves
**Enlarged retropharyngeal lymph nodes
**Neoplasia
**Trauma
==Test yourself with the Larynx Pathology Flashcards==
[[Larynx_Flashcards_-_Pathology|Larynx Pathology Flashcards]]
[[Category:Larynx - Pathology]]
[[Category:Respiratory System - Degenerative Pathology]]
*Unilateral paralysis of arytenoids
*Common 2-13% training thoroughbreds
*Damaged/ dysfunctional recurrent laryngel nerve (branch of vagus)
*Mostly left side affected, occasionally also the right nerve
*Demyelination of nerve fibres, and leading to atrophy of intrinsic laryngeal muscles particularly the adductor (cricoarytenoid) which allows the left arytenoid cartilage to lean into the laryngeal lumen
*The 'roaring' is noticeable after exercising
*The aetiology is not properly established but suggested factors are:
**Length of the left recurrent nerve
**Extension neuritis in [[Guttural Pouch Mycosis|guttural pouch mycosis]]
**Neurotoxins - organophosphorus compounds may produce similar degenerative changes in the nerves
**Enlarged retropharyngeal lymph nodes
**Neoplasia
**Trauma
==Test yourself with the Larynx Pathology Flashcards==
[[Larynx_Flashcards_-_Pathology|Larynx Pathology Flashcards]]
[[Category:Larynx - Pathology]]
[[Category:Respiratory System - Degenerative Pathology]]