Difference between revisions of "Laryngeal Hemiplegia"
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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...") |
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==Test yourself with the Larynx Pathology Flashcards== | ==Test yourself with the Larynx Pathology Flashcards== | ||
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[[Category:Larynx - Pathology]] | [[Category:Larynx - Pathology]] | ||
[[Category:Respiratory System - Degenerative Pathology]] | [[Category:Respiratory System - Degenerative Pathology]] | ||
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Revision as of 13:51, 19 February 2011
- 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
- Neurotoxins - organophosphorus compounds may produce similar degenerative changes in the nerves
- Enlarged retropharyngeal lymph nodes
- Neoplasia
- Trauma