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[http://w3.vet.cornell.edu/nst/nst.asp?Fun=F_KSsrch&kw=HEMIPLEGIA View images courtesy of Cornell Veterinary Medicine]
[http://w3.vet.cornell.edu/nst/nst.asp?Fun=F_KSsrch&kw=HEMIPLEGIA View images courtesy of Cornell Veterinary Medicine]
Idiopathic Laryngeal Hemiplegia:
:Progressive loss of fibres (esp. large diameter) within left recurrent laryngeal nerve compared to right
:Dying back axonopathy with myelin sheath involvement:
:Degenerating fibres
:Regenerating clusters
:De/Re-myelination
:Flattening of nerve between aorta & trachea
:Inspiratory 'roaring' noise - flapping of vocal fold
:'Slap test' - adduction of contralateral arytenoid during expiration
:Endoscopic examination - assymetric arytenoids, poor abduction of left vocal fold.
:Palpable atrophy of laryngeal musculature
:Laryngeal Ventriculectomy (Hobday procedure)
:'Tie Back'
:Laryngeal muscle prosthesis
:Prognosis usually good
==Test yourself with the Larynx Pathology Flashcards==
==Test yourself with the Larynx Pathology Flashcards==
[[Category:Respiratory Diseases - Horse]]
[[Category:Respiratory Diseases - Horse]]
[[Category:Central Nervous System - Degenerative Pathology]]
[[Category:Central Nervous System - Degenerative Pathology]]
[[Category:Peripheral Nervous System - Pathology]]