Brainstem Conduction Abnormalities in Spasmodic Dysphonia

1983 ◽  
Vol 92 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Steven D. Schaefer ◽  
Irvin J. Gerling ◽  
Terese Finitzo-Hieber ◽  
Frances J. Freeman
Keyword(s):  
Nervous System ◽  
Auditory Brainstem Response ◽  
Cranial Nerve ◽  
Auditory Brainstem ◽  
Spasmodic Dysphonia ◽  
Amplitude Ratios ◽  
Stimulus Rate ◽  
Brainstem Response ◽  
High Stimulus ◽  
Interpeak Latency

Twelve spasmodic dysphonia patients were evaluated by three different auditory brainstem response parameters; 75 % were abnormal. Three of the 12 had prolonged wave I-V interpeak latency. Seven had pathologic wave V latency shifts at a high stimulus rate. Amplitude ratios were normal for all subjects. The authors hypothesize that spasmodic dysphonia is a disorder of variable cranial nerve symptom presentations, and offer several possible models to account for its sporadic representation in the nervous system.

Auditory Brainstem Response with High Stimulus Rates in Normal and Patient Populations

1983 ◽  
Vol 92 (2) ◽  
pp. 119-123 ◽  
Author(s):  
Irvin J. Gerling ◽  
Terese Finitzo-Hieber
Keyword(s):  
Auditory Brainstem Response ◽  
Normative Data ◽  
Normal Subjects ◽  
Auditory Brainstem ◽  
Auditory Sensitivity ◽  
Stimulus Rate ◽  
Brainstem Response ◽  
High Stimulus ◽  
Latency Shift ◽  
Cns Pathology

Normative data were collected on 48 subjects to determine the effects of increasing stimulus rates on the auditory brainstem response. These subjects were then compared to 221 patients referred for otoneurologic evaluation. The 90 patients with impaired auditory sensitivity demonstrated significantly less wave V latency shift than either the 131 patients with normal auditory sensitivity or the normal subjects. The incidence of abnormal wave V latency shift was 12% in the patients with normal auditory sensitivity and 8% in the patients with impaired auditory sensitivity. The high stimulus rate was often the only abr parameter indicative of brainstem involvement in patients with documented CNS pathology. The authors conclude that a high stimulus rate contributes to the diagnosis of brainstem pathology often enough to warrant its routine use.

scholarly journals Age-Related Changes in the Auditory Brainstem Response and Suprathreshold Processing of Temporal and Spectral Modulation

2019 ◽  
Vol 23 ◽  
pp. 233121651983961 ◽  
Author(s):  
John H. Grose ◽  
Emily Buss ◽  
Hollis Elmore
Keyword(s):  
Auditory Brainstem Response ◽  
Background Noise ◽  
Auditory Brainstem ◽  
Temporal Modulation ◽  
Amplitude Ratios ◽  
Spectral Modulation ◽  
Age Related ◽  
Brainstem Response ◽  
Modulation Detection ◽  
Hearing Difficulties

The purpose of this study was to determine whether cochlear synaptopathy can be shown to be a viable basis for age-related hearing difficulties in humans and whether it manifests as deficient suprathreshold processing of temporal and spectral modulation. Three experiments were undertaken evaluating the effects of age on (a) the auditory brainstem response as a function of level, (b) temporal modulation detection as a function of level and background noise, and (c) spectral modulation as a function of level. Across the three experiments, a total of 21 older listeners with near-normal audiograms and 29 young listeners with audiometrically normal hearing participated. The auditory brainstem response experiment demonstrated reduced Wave I amplitudes and concomitant reductions in the amplitude ratios of Wave I to Wave V in the older listener group. These findings were interpreted as consistent with an electrophysiological profile of cochlear synaptopathy. The temporal and spectral modulation detection experiments, however, provided no support for the hypothesis of compromised suprathreshold processing in these domains. This pattern of results suggests that even if cochlear synaptopathy can be shown to be a viable basis for age-related hearing difficulties, then temporal and spectral modulation detection paradigms are not sensitive to its presence.

Central Auditory Evaluation of Patients with Spasmodic Dysphonia

1997 ◽  
Vol 76 (10) ◽  
pp. 710-715 ◽  
Author(s):  
Michele L. Middleton ◽  
Keith M. Wilson ◽  
Robert W. Keith
Keyword(s):  
Auditory Processing ◽  
Auditory Pathway ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Spasmodic Dysphonia ◽  
Central Auditory Processing ◽  
Cortical Function ◽  
Brainstem Response ◽  
Positive Scan ◽  
High Stimulus

Spasmodic dysphonia is a focal laryngeal dystonia characterized by inappropriate contractions of the intrinsic laryngeal musculature. The prevalence of associated neurological findings has led to detailed investigation of the central nervous system. Previous research revealed latency abnormalities in patients’ auditory brainstem responses. The present study further investigated central auditory findings in patients with spasmodic dysphonia, including brainstem and cortical function. Fourteen normal-hearing patients with spasmodic dysphonia were tested using the auditory brainstem response (ABR) and SCAN-A test of central auditory processing. The ABR estimated brainstem transmission time and evaluated auditory pathway integrity at a high stimulus rate. SCAN-A assessed the auditory cerebral cortex. Implications of these findings are discussed. We found no ABR abnormalities in subjects with spasmodic dysphonia. Positive SCAN-A findings were negligible. The ABR findings contradict previous reports.

Effects of Stimulus Repetition Rates on the Auditory Brainstem Response to Level-Specific CE-Chirp in Normal-Hearing Adults

2020 ◽  
Vol 29 (4) ◽  
pp. 838-850
Author(s):  
Ahmad Aidil Arafat Dzulkarnain ◽  
Fatin Amira Shahrudin ◽  
Fatin Nabilah Jamal ◽  
Muhammad Nasrullah Marzuki ◽  
Mohd Naufal Shah Mazlan
Keyword(s):  
Auditory Brainstem Response ◽  
Auditory Brainstem ◽  
Normal Hearing ◽  
Repeated Measure ◽  
Stimulus Repetition ◽  
Residual Noise ◽  
Brainstem Response ◽  
High Stimulus ◽  
Almost All ◽  
Study Participants

Purpose The purpose of this study is to investigate the influence of stimulus repetition rates on the auditory brainstem response (ABR) to Level-Specific (LS) CE-Chirp and click stimuli at multiple intensity levels in normal-hearing adults. Method A repeated-measure study design was used on 13 normal-hearing adults. ABRs were acquired from the study participants using LS CE-Chirp and click stimuli at four stimulus repetition rates (19.1, 33.3, 61.1, and 81.1 Hz) and four intensity levels (80, 60, 40, and 20 dB nHL). The ABR test was stopped at 40-nV residual noise level. Results High-stimulus repetition rates caused the ABR latencies to be longer and have reduced amplitudes in both ABR to LS CE-Chirp and click stimuli. The ABR to LS CE-Chirp Wave I, III, and V amplitudes were larger than ABR to click in almost all the stimulus repetition rates. However, there were no differences in the number of averages required to reach the stopping criterion between ABR to LS CE-Chirp and click stimulus, and between high-stimulus repetition rates and low-stimulus repetition rates. Conclusion The LS CE-Chirp at standard low-stimulus repetition rates can be used to elicit ABR for both neurodiagnostic and threshold seeking procedure.

The effects of stimulus rate and electrode montage on the auditory brainstem response in infants

2013 ◽  
Vol 16 (4) ◽  
pp. 221-226 ◽  
Author(s):  
Ahmad Aidil Arafat bin Dzulkarnain ◽  
Umi Sarah Abdul Hadi ◽  
Nur ’Azzah Zakaria
Keyword(s):  
Auditory Brainstem Response ◽  
Auditory Brainstem ◽  
Stimulus Rate ◽  
Brainstem Response
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