Brainstem auditory-evoked responses in horses with temporohyoid osteoarthropathy

Monica R Aleman, S. M. Puchalski, D. C. Williams, Philip H Kass, T. A. Holliday

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Background: Facial and vestibulocochlear nerve dysfunction occurs commonly in horses with temporohyoid osteoarthropathy (THO); however, auditory dysfunction has not been thoroughly assessed. Objective: To determine if auditory abnormalities occur in horses with THO. Animals: Eleven diseased and 8 control horses. Methods: This is a prospective study in which brainstem auditory-evoked responses (BAER) were recorded in 11 horses diagnosed with THO through neurologic, endoscopic, radiographic, or computed tomographic examinations. BAER findings were compared with those recorded from 8 adult control horses. Results: All horses with THO were found to have BAER abnormalities that included complete unilateral BAER loss (82%, n = 9/11), partial unilateral BAER loss (18%, n = 2/11) on the most affected side, and contralateral partial BAER loss (46%, n = 5/11). Nine horses had bilateral THO based on diagnostic imaging findings; of these. 5 (56%) horses also had bilateral BAER abnormalities. The complete absence of BAER in affected horses was most consistent with peripheral sensorineural hearing loss. There was a significant association between complete BAER loss and neurologic and diagnostic abnormalities. Conclusions and Clinical Importance: Auditory abnormalities such as complete or partial BAER loss are common in horses with THO. The BAER test is an objective diagnostic tool that can aid along with other diagnostic modalities in the assessment, management, and follow-up of horses with THO. Furthermore, BAER studies may help to elucidate the pathophysiology of THO in horses.

Original languageEnglish (US)
Pages (from-to)1196-1202
Number of pages7
JournalJournal of Veterinary Internal Medicine
Volume22
Issue number5
DOIs
StatePublished - Sep 2008

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Brain Stem Auditory Evoked Potentials
brain stem
Horses
horses
nervous system
Vestibulocochlear Nerve
Nervous System Malformations
Animal Diseases
Sensorineural Hearing Loss
Facial Nerve
hearing
Diagnostic Imaging
pathophysiology
prospective studies
Nervous System
nerve tissue
image analysis
Prospective Studies

Keywords

  • Auditory
  • BAER
  • Equine
  • Vestibulocochlear

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Brainstem auditory-evoked responses in horses with temporohyoid osteoarthropathy. / Aleman, Monica R; Puchalski, S. M.; Williams, D. C.; Kass, Philip H; Holliday, T. A.

In: Journal of Veterinary Internal Medicine, Vol. 22, No. 5, 09.2008, p. 1196-1202.

Research output: Contribution to journalArticle

Aleman, Monica R ; Puchalski, S. M. ; Williams, D. C. ; Kass, Philip H ; Holliday, T. A. / Brainstem auditory-evoked responses in horses with temporohyoid osteoarthropathy. In: Journal of Veterinary Internal Medicine. 2008 ; Vol. 22, No. 5. pp. 1196-1202.
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