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**Neoplasia
**Neoplasia
**Trauma
**Trauma
* These horses are also known as "'''roarers'''"
* Equine laryngeal hemiplegia is a very common condition.
===Pathogenesis===
# The disease starts with an idiopathic degeneration of the left recurrent laryngeal nerve.
# This leads to atrophy of the left dorsal cricoarytenoid muscle.
# Without the use of this muscle, the horse is unable to abduct the left arytenoid cartilage and vocal fold.
# Airways are therefore partially obstructed on inspiration.
[http://w3.vet.cornell.edu/nst/nst.asp?Fun=F_KSsrch&kw=HEMIPLEGIA View images courtesy of Cornell Veterinary Medicine]
[[Category:Larynx - Pathology]]
[[Category:Larynx - Pathology]]
[[Category:Respiratory System - Degenerative Pathology]]
[[Category:Respiratory System - Degenerative Pathology]]
[[Category:Respiratory Diseases - Horse]]
[[Category:Central Nervous System - Degenerative Pathology]]