Brain Stem Auditory‐Evoked Response Abnormalities in 14 Dogs With Confirmed Central Nervous System Lesions

Steiss, Janet E.; Cox, Nancy R.; Hathcock, John T.

doi:10.1111/j.1939-1676.1994.tb03236.x

Cited by 38 publications

(37 citation statements)

References 18 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The study was considered abnormal and categorized as follows: absence of identifiable BAER peaks was consistent with complete hearing loss whereas increased peak latency (prolonged beyond 2 standard deviations [SD] from normal mean values),21 difficulty identifying peaks (decreased amplitude) or both was suggestive of partial hearing loss 7, 21, 22…”

Section: Methodsmentioning

confidence: 99%

Brainstem Auditory Evoked Responses in an Equine Patient Population: Part I – Adult Horses

Aleman

Holliday

Nieto

et al. 2014

Veterinary Internal Medicne

View full text Add to dashboard Cite

BackgroundBrainstem auditory evoked response has been an underused diagnostic modality in horses as evidenced by few reports on the subject.Hypothesis/ObjectivesTo describe BAER findings, common clinical signs, and causes of hearing loss in adult horses.AnimalsStudy group, 76 horses; control group, 8 horses.MethodsRetrospective. BAER records from the Clinical Neurophysiology Laboratory were reviewed from the years of 1982 to 2013. Peak latencies, amplitudes, and interpeak intervals were measured when visible. Horses were grouped under disease categories. Descriptive statistics and a posthoc Bonferroni test were performed.ResultsFifty‐seven of 76 horses had BAER deficits. There was no breed or sex predisposition, with the exception of American Paint horses diagnosed with congenital sensorineural deafness. Eighty‐six percent (n = 49/57) of the horses were younger than 16 years of age. The most common causes of BAER abnormalities were temporohyoid osteoarthropathy (THO, n = 20/20; abnormalities/total), congenital sensorineural deafness in Paint horses (17/17), multifocal brain disease (13/16), and otitis media/interna (4/4). Auditory loss was bilateral and unilateral in 74% (n = 42/57) and 26% (n = 15/57) of the horses, respectively. The most common causes of bilateral auditory loss were sensorineural deafness, THO, and multifocal brain disease whereas THO and otitis were the most common causes of unilateral deficits.Conclusions and Clinical ImportanceAuditory deficits should be investigated in horses with altered behavior, THO, multifocal brain disease, otitis, and in horses with certain coat and eye color patterns. BAER testing is an objective and noninvasive diagnostic modality to assess auditory function in horses.

show abstract

Section: Methodsmentioning

confidence: 99%

Brainstem Auditory Evoked Responses in an Equine Patient Population: Part I – Adult Horses

Aleman

Holliday

Nieto

et al. 2014

Veterinary Internal Medicne

View full text Add to dashboard Cite

show abstract

“…17,18 Frequency-specific information is needed to assess the extent of neurologic deafness, such as noise-induced deafness and that caused by ototoxicity and presbycusis, each of which can be partial and frequency-specific. [18][19][20][21][22][23] Considerable research has been conducted on factors that influence wave latency, amplitude, and thresholds in dogs and on the clinical applicability of these factors.…”

Section: -7mentioning

confidence: 99%

Click and Low‐, Middle‐, and High‐Frequency Toneburst Stimulation of the Canine Cochlea

Haar

Haagen

Groot

et al. 2002

Veterinary Internal Medicne

View full text Add to dashboard Cite

A method was developed to deliver tonebursts ranging in frequency from 1 to 32 kHz for frequency-specific assessment of the canine cochlea. Brainstem auditory-evoked responses (early latency responses, 0-10 ms) to a click (CS) and to 1-, 2-, 4-, 8-, 12-, 16-, 24-, and 32-kHz toneburst stimulations (TS) were compared at 80-dB sound pressure level stimulus (SPL) intensity in 10 adult dogs. All stimulations yielded a 5-7 positive wave pattern, with the exception of the 1-kHz TS, which evoked a frequencyfollowing response (FFR). Thresholds were lowest for the CS and the 12-and 16-kHz TS. All individual peak latencies for TS were significantly (P Յ .05) longer than for CS. Peak I latencies were significantly (P Յ .05) shorter for the 12-and 16-kHz TS than for the other TS. Interpeak latencies I-V were significantly (P Յ .05) longer for the 4-to 32-kHz TS than for CS. Differences in interpeak latencies I-III were not significant. Amplitudes of waves I and V were significantly (P Յ .05) lower for TS than for CS, except for higher wave V amplitude (P Յ .05) at 2-and 32-kHz TS. Peak I-V amplitude ratios were significantly (P Յ .05) higher for the 2-, 4-, 16-, 24-, and 32-kHz TS and lower for the 8-and 12-kHz TS, compared to CS. We conclude that reproducible information on frequency specificity of the canine cochlea can be obtained by TS. This report provides a normative database for parameters needed to evaluate frequency-specific hearing loss in dogs.Key words: Brainstem-evoked response audiometry; Dog; Frequency-specificity; Threshold audiogram. Several methods have been employed to test hearing ability in dogs, ranging from behavioral studies to measurement of electrical responses after auditory stimulation, by impedance audiometry (tympanometry, acoustic reflex testing), evoked response audiometry (brainstem [BAER] and middle latency auditory-evoked responses), and cochlear microphony. 1-7During the past 2 decades, BAERs have been used for this purpose with increasing frequency in veterinary medicine. The acoustic signal usually has consisted of a click, which stimulates a large part of the cochlea.8-14 Brainstemevoked response audiometry by a click (CS) is useful for differentiating neurologic from conduction deafness 15,16 and is useful in assessing some brainstem pathologic changes. 17,18 Frequency-specific information is needed to assess the extent of neurologic deafness, such as noise-induced deafness and that caused by ototoxicity and presbycusis, each of which can be partial and frequency-specific. [18][19][20][21][22][23] Considerable research has been conducted on factors that influence wave latency, amplitude, and thresholds in dogs and on the clinical applicability of these factors.9,24-31 Behavioral studies indicate that dogs can hear frequencies up to 45 kHz, 1 considerably higher frequencies than heard by humans, 13 but the tonebursts used in BAER assessment of hearing in dogs have been at frequencies only as high as 8 kHz. 24-26From The aim of this study was to collect reference values for BAER wave...

show abstract

“…Mais comumente, o BAEP é usado para auxiliar o diagnóstico de diversas formas de surdez, particularmente a hereditária e a senil (Strain et al, 1992;Luttgen, 1994;Strain, 1996), para determinar o limiar acústico de animais (Kay et al, 1984;Marshall, 1986) e em estudos para avaliar a ototoxicidade de alguns medicamentos (Uzuka et al, 1996). O exame também auxilia a avaliação da integridade do tronco encefálico, podendo ser usado em animais com trauma craniano, déficits de equilíbrio e em outras condições em que o animal está comatoso e os reflexos de nervos cranianos não podem ser avaliados (Luttgen, 1994;Steiss et al, 1994).…”

Section: Introductionunclassified

Estudo normativo e avaliação da influência da idade no potencial evocado auditivo em cães sem raça definida

Palumbo¹,

Resende²,

Borges³

2013

Arq. Bras. Med. Vet. Zootec.

View full text Add to dashboard Cite

 RESUMOO objetivo deste trabalho foi realizar estudo normativo dos potenciais evocados auditivos obtidos de 34 cães sem raça definida e avaliar a influência da idade nos resultados obtidos. Os animais foram divididos em dois grupos de diferentes faixas etárias e o potencial evocado auditivo foi realizado com um estímulo de 85dB. O grupo 1 incluiu 16 cães com idades entre um e oito anos e o grupo 2, 18 animais com idades acima de oito anos. O comprimento e o diâmetro da cabeça foram mensurados e não houve diferença estatística entre os dois grupos. No grupo 1, as médias das latências das ondas I, III e V foram: 1,13; 2,64 e 3,45ms; e dos intervalos I-III, III-V e I-V foram 1,51; 0,81 e 2,32ms, respectivamente. No grupo 2, as médias das latências das ondas I, III e V foram 1,15; 2,62 e 3,55ms; e dos intervalos I-III, III-V e I-V foram 1,47; 0,93 e 2,40ms, respectivamente. As latências observadas neste estudo foram semelhantes a estudos prévios realizados por outros autores. Nos grupos etários analisados e nas condições preestabelecidas deste estudo, a idade influenciou a latência da onda V e, consequentemente, modificou os intervalos III-V e I-V, portanto deve-se considerar essa variante na interpretação dos resultados do BAEP em cães. I, III, and V were 1.13; 2.64, and 3.45ms, 0.81, and 2.32 ms, respectively. In group 2, the mean latencies of waves I, III and V were 1.15, 2.62, and 3.55ms, 0.93, and 2.40ms, respectively. The latencies observed in this study were similar to previous studies conducted by other authors. It was observed that significant differences were present for wave V and intervals III-V and I-V latencies when comparing groups with different ages, consequently this characteristic must be considered during BAEP result interpretation. Palavras-chave: potencial evocado auditivo, idade, cães ABSTRACT

show abstract

Brain Stem Auditory‐Evoked Response Abnormalities in 14 Dogs With Confirmed Central Nervous System Lesions

Cited by 38 publications

References 18 publications

Brainstem Auditory Evoked Responses in an Equine Patient Population: Part I – Adult Horses

Brainstem Auditory Evoked Responses in an Equine Patient Population: Part I – Adult Horses

Click and Low‐, Middle‐, and High‐Frequency Toneburst Stimulation of the Canine Cochlea

Estudo normativo e avaliação da influência da idade no potencial evocado auditivo em cães sem raça definida

Contact Info

Product

Resources

About