Auditory Evoked Potentials in Epileptic Patients

Soliman, Soliman M.; Mostafa, Mahmoud; Kamal, Nadia; Raafat, Mona; Hazzaa, Nagwa

doi:10.1097/00003446-199308000-00002

Cited by 18 publications

(8 citation statements)

References 10 publications

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“…Such increases were also reported by Soliman et al, in a study involving epileptic patients 21. The authors found that middle latency responses (MLRs) and ASSRs were elevated in 40.7% of the epileptic patients.…”

Section: Discussionsupporting

confidence: 78%

Sensitivity and specificity of auditory steady-state response testing

Rabelo

Schochat

2011

Clinics

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INTRODUCTION:The ASSR test is an electrophysiological test that evaluates, among other aspects, neural synchrony, based on the frequency or amplitude modulation of tones.OBJECTIVE:The aim of this study was to determine the sensitivity and specificity of auditory steady‐state response testing in detecting lesions and dysfunctions of the central auditory nervous system. METHODS:Seventy volunteers were divided into three groups: those with normal hearing; those with mesial temporal sclerosis; and those with central auditory processing disorder. All subjects underwent auditory steady‐state response testing of both ears at 500 Hz and 2000 Hz (frequency modulation, 46 Hz). The difference between auditory steady‐state response‐estimated thresholds and behavioral thresholds (audiometric evaluation) was calculated.RESULTS:Estimated thresholds were significantly higher in the mesial temporal sclerosis group than in the normal and central auditory processing disorder groups. In addition, the difference between auditory steady‐state response‐estimated and behavioral thresholds was greatest in the mesial temporal sclerosis group when compared to the normal group than in the central auditory processing disorder group compared to the normal group. DISCUSSION:Research focusing on central auditory nervous system (CANS) lesions has shown that individuals with CANS lesions present a greater difference between ASSR‐estimated thresholds and actual behavioral thresholds; ASSR‐estimated thresholds being significantly worse than behavioral thresholds in subjects with CANS insults. This is most likely because the disorder prevents the transmission of the sound stimulus from being in phase with the received stimulus, resulting in asynchronous transmitter release. Another possible cause of the greater difference between the ASSR‐estimated thresholds and the behavioral thresholds is impaired temporal resolution.CONCLUSIONS:The overall sensitivity of auditory steady‐state response testing was lower than its overall specificity. Although the overall specificity was high, it was lower in the central auditory processing disorder group than in the mesial temporal sclerosis group. Overall sensitivity was also lower in the central auditory processing disorder group than in the mesial temporal sclerosis group.

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Section: Discussionsupporting

confidence: 78%

Sensitivity and specificity of auditory steady-state response testing

Rabelo

Schochat

2011

Clinics

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“…However, discrepancies between both measures have also been observed. Soliman et al (1993) report that approximately 30% of the epileptic patients in their study population showed elevated ABR thresholds although thresholds determined by pure tone audiometry (behavioral thresholds) were normal. In gerbils, ABR studies show that age dependent changes develop in animals older than 2 years (Boettcher et al, 1993; Mills et al, 1990).…”

Section: Discussionmentioning

confidence: 88%

Electrophysiological and morphological development of the inner ear in Belgian Waterslager canaries

et al. 2010

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Belgian Waterslager (BW) canaries have an inherited hearing loss due to missing and abnormal hair cells, but it is unclear whether the loss is congenital or developmental. We used auditory brainstem responses and scanning electron microscopy to describe the development of auditory sensitivity and hair cell abnormalities in BW and non-BW canary. In both strains, adult ABR thresholds were higher than behavioral thresholds, but BW canaries exhibited higher thresholds than non-BW canaries across all frequencies. Immediately post-hatch, ABR thresholds and hair cell numbers were similar in both strains. Two weeks later, thresholds were significantly higher in BW canaries and hair cell number progressively decreased as the birds aged. These data show that in BW canaries: the peripheral auditory system is functionally similar to non-BW canary from hatch to 2 weeks, ABR thresholds improve during this developmental period, actually becoming better than those of adults, but then worsen as the bird continues to age, and hair cell number and appearance is similar to non-BW canaries at hatch but progressively declines after 30 days of age. These data show that the hearing loss characteristic of BW canaries is, at least in part, developmental and is established by the time song learning begins.

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“…These were predicted by Galambos 12 and confirmed by Worthington and Peters 13 and Kraus et al 14 and have since been seen by many other authors. [15][16][17][18] The ABR is not an objective hearing test in and of itself. Although synchronous responses following a normal latency-intensity function can be highly predictive of audiometric results, 19,20 an absent ABR need not mean absence of hearing sensitivity.…”

Section: The Continuummentioning

confidence: 99%

Auditory Neuropathy/Dys-Synchrony: After the Diagnosis, then What?

Berlín¹,

Li²,

Hood³

et al. 2002

Semin Hear

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Neither auditory brainstem response (ABR) nor otoacoustic emissions (OAEs) are objective hearing tests, nor are their results always mutually consistent in any one patient. Therefore, it is quite possible for a patient to have normal emissions but absent or grossly abnormal ABR and behavioral audiograms that are inconsistent with either test. These patients, who may constitute as much as 10% of the diagnosed deaf population, are the subject of this article. To diagnose as many as possible properly from the onset, we urge triage (sorting or preselection by a system of priorities designed to maximize the effectiveness of treatment or outcome) using (1) tympanometry, (2) middle ear muscle reflexes, and (3) OAEs. Early diagnosis is essential because after either hearing aid use or the passage of time these patients often lose their OAEs and become almost indistinguishable from patients with ordinary deafness. Because auditory verbal therapy and hearing aids are rarely if ever successful with these patients until after cochlear implantation, it is essential to design intervention and interpret their audiograms physiologically rather than in conventional articulation index terms. This article offers management suggestions based on our experiences with close to 200 patients and their families. These suggestions include cued speech and baby signs for newborns. Cued speech gives them access to their parents' vocabulary and language, and the baby signs give them vocabulary to express needs and wants and remain linguistically attached. Then, if they are among the 93% of children who stay impaired, we have seen that cochlear implants are quite effective.

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Auditory Evoked Potentials in Epileptic Patients

Cited by 18 publications

References 10 publications

Sensitivity and specificity of auditory steady-state response testing

Sensitivity and specificity of auditory steady-state response testing

Electrophysiological and morphological development of the inner ear in Belgian Waterslager canaries

Auditory Neuropathy/Dys-Synchrony: After the Diagnosis, then What?

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