Cortical Auditory-Evoked Potentials in Response to Multitone Stimuli in Hearing-Impaired Adults

2016 ◽  
Vol 27 (05) ◽  
pp. 406-415 ◽  
Author(s):  
Fabrice Bardy ◽  
Jessica Sjahalam-King ◽  
Bram Van Dun ◽  
Harvey Dillon
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Hearing Impairment ◽  
Auditory Evoked Potentials ◽  
Hearing Impaired ◽  
Detection Sensitivity ◽  
Auditory Stimuli ◽  
Significant Difference ◽  
Objective Detection ◽  
Cortical Auditory Evoked Potentials

Purpose: To determine if one-octave multitone (MT) stimuli increase the amplitude of cortical auditory-evoked potentials (CAEPs) in individuals with a hearing loss when compared to standard pure-tone (PT) stimuli and narrow-band noise (NBN). Research Design: CAEPs were obtained from 16 hearing-impaired adults in response to PT and MT auditory stimuli centered around 0.5, 1, 2, and 4 kHz and NBN centered around 1 and 2 kHz. Hearing impairment ranged from a mild to a moderate hearing loss in both ears. Auditory stimuli were monaurally delivered through insert earphones at 10 and 20 dB above threshold. The root mean square amplitude of the CAEP and the detectability of the responses using Hotelling’s T2 were calculated and analyzed. Results: CAEP amplitudes elicited with MT stimuli were on average 29% larger than PT stimuli for frequencies centered around 1, 2, and 4 kHz. No significant difference was found for responses to 0.5-kHz stimuli. Significantly higher objective detection scores were found for MT when compared to PT. For the 1- and 2-kHz stimuli, the CAEP amplitudes to NBN were not significantly different to those evoked by PT but a significant difference was found between MT stimuli and both NBN and PT. The mean detection sensitivity of MT for the four frequencies was 80% at 10 dB SL and 95% at 20 dB SL, and was comparable with detection sensitivities observed in normal-hearing participants. Conclusions: Using MT stimuli when testing CAEPs in adults with hearing impairment showed larger amplitudes and a higher objective detection sensitivity compared to using traditional PT stimuli for frequencies centered around 1, 2, and 4 kHz. These findings suggest that MT stimuli are a clinically useful tool to increase the efficiency of frequency-specific CAEP testing in adults with hearing impairment.

scholarly journals Analysis of the Effect of Musical Stimulation on Cortical Auditory Evoked Potentials

2018 ◽  
Vol 23 (01) ◽  
pp. 031-035
Author(s):  
Daiane Lima ◽  
Simone Regaçone ◽  
Anna Oliveira ◽  
Yara Alcântara ◽  
Eduardo Chagas ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
Auditory System ◽  
Repeated Measures ◽  
Auditory Evoked Potentials ◽  
P Value ◽  
Mixed Analysis ◽  
Sphericity Test ◽  
Significant Difference ◽  
Healthy Female ◽  
Cortical Auditory Evoked Potentials

Introduction Cortical auditory evoked potentials (CAEPs) are bioelectric responses that occur from acoustic stimulations, and they assess the functionality of the central auditory system. Objective The objective of the present study was to analyze the effect of musical stimulation on CAEPs. Methods The sample consisted of 42 healthy female subjects, aged between 18 and 24 years, divided into two groups – G1: without musical stimulation prior to the CAEP examination; and G2: with stimulation prior to the examination. In both groups, as a pre-collection procedure, the complete basic audiological evaluation was performed. For the musical stimulation performed in G2, we used an MP4 player programmed to play Pachelbel's “Canon in D Major” for five minutes prior to the CAEP examination. To analyze the effect on the groups, the ear side and the ide–group interaction , a mixed analysis of variance (ANOVA) of repeated measures was performed. Box M test and Mauchly sphericity test were also performed. Results Test differences were considered statistically significant when the p-value was < 0.05 (5%). Thus, it was possible to observe that there was a statistically significant difference of the P2 component characterized by the decrease in the amplitude of response in the left ear in G2 when comparing the responses of CAEP with and without prior musical stimulation. Conclusion The result of the present study enabled us to conclude that there was a change in the response of CAEPs with musical stimulation.

scholarly journals Clinical Experience of Using Cortical Auditory Evoked Potentials in the Treatment of Infant Hearing Loss in Australia

2016 ◽  
Vol 37 (01) ◽  
pp. 036-052 ◽  
Author(s):  
Bram Van Dun ◽  
Alison King ◽  
Lyndal Carter ◽  
Wendy Pearce ◽  
Simone Punch
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Clinical Experience ◽  
Auditory Evoked Potentials ◽  
Cortical Auditory Evoked Potentials

Threshold Estimation Using “Chained Stimuli” for Cortical Auditory Evoked Potentials in Individuals With Normal Hearing and Hearing Impairment

2019 ◽  
Vol 28 (2S) ◽  
pp. 428-436
Author(s):  
Mohan Kumar Kalaiah ◽  
Sanjana Poovaiah ◽  
Usha Shastri
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Normal Hearing ◽  
Testing Time ◽  
Threshold Estimation ◽  
Behavioral Threshold ◽  
Hearing Sensitivity ◽  
The Difference ◽  
Cortical Auditory Evoked Potentials

Purpose We investigated the utility of chained stimuli for threshold estimation using cortical auditory evoked potentials (CAEPs) in individuals with normal hearing sensitivity and hearing loss. The effect of the order of frequency in chained stimuli on CAEPs was also studied. Method Seventeen individuals with normal hearing and 17 individuals with mild to severe sensorineural hearing loss participated in the study. In individuals with normal hearing, CAEPs were recorded at 80 dB nHL for 4 chained stimuli with different orders of frequencies within them (Chained Stimuli 1 [CS1]: 500, 1000, 2000, 4000 Hz; Chained Stimuli 2: 4000, 2000, 1000, 500 Hz; Chained Stimuli 3: 500, 2000, 1000, 4000 Hz; Chained Stimuli 4: 4000, 1000, 2000, 500 Hz). CAEP threshold estimation was carried out using CS1 in both groups and was compared with behavioral pure-tone thresholds. Results CS1 elicited the largest amplitude responses at low and mid frequencies, whereas all 4 stimuli elicited similar amplitude responses at high frequencies. CAEP thresholds were generally within 10–20 dB above the participants' behavioral threshold in both groups. The difference between CAEP threshold and behavioral threshold was less for individuals with hearing loss compared to individuals with normal hearing. There was a significant positive correlation between CAEP threshold and behavioral threshold at all the frequencies. Conclusions CS1 could be used to elicit CAEPs for threshold estimation in adult participants with normal hearing and hearing loss of varied degrees with theoretically reduced testing time. The actual time reduction using chained stimuli and the correction factor to be applied to estimate behavioral threshold can be studied in future investigations.

scholarly journals Age Effects on Neural Representation and Perception of Silence Duration Cues in Speech

2019 ◽  
Vol 62 (4S) ◽  
pp. 1099-1116 ◽  
Author(s):  
Lindsey Roque ◽  
Casey Gaskins ◽  
Sandra Gordon-Salant ◽  
Matthew J. Goupell ◽  
Samira Anderson
Keyword(s):  
Hearing Loss ◽  
Regression Analysis ◽  
Linear Regression ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Linear Regression Analysis ◽  
Auditory Brainstem ◽  
Normal Hearing ◽  
Group Differences ◽  
Cortical Auditory Evoked Potentials

Purpose Degraded temporal processing associated with aging may be a contributing factor to older adults' hearing difficulties, especially in adverse listening environments. This degraded processing may affect the ability to distinguish between words based on temporal duration cues. The current study investigates the effects of aging and hearing loss on cortical and subcortical representation of temporal speech components and on the perception of silent interval duration cues in speech. Method Identification functions for the words DISH and DITCH were obtained on a 7-step continuum of silence duration (0–60 ms) prior to the final fricative in participants who are younger with normal hearing (YNH), older with normal hearing (ONH), and older with hearing impairment (OHI). Frequency-following responses and cortical auditory-evoked potentials were recorded to the 2 end points of the continuum. Auditory brainstem responses to clicks were obtained to verify neural integrity and to compare group differences in auditory nerve function. A multiple linear regression analysis was conducted to determine the peripheral or central factors that contributed to perceptual performance. Results ONH and OHI participants required longer silence durations to identify DITCH than did YNH participants. Frequency-following responses showed reduced phase locking and poorer morphology, and cortical auditory-evoked potentials showed prolonged latencies in ONH and OHI participants compared with YNH participants. No group differences were noted for auditory brainstem response Wave I amplitude or Wave V/I ratio. After accounting for the possible effects of hearing loss, linear regression analysis revealed that both midbrain and cortical processing contributed to the variance in the DISH–DITCH perceptual identification functions. Conclusions These results suggest that age-related deficits in the ability to encode silence duration cues may be a contributing factor in degraded speech perception. In particular, degraded response morphology relates to performance on perceptual tasks based on silence duration contrasts between words.

scholarly journals Cortical Auditory Evoked Potentials in Children with a Hearing Loss: A Pilot Study

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Amineh Koravand ◽  
Benoît Jutras ◽  
Maryse Lassonde
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Hearing Aids ◽  
Auditory Processing ◽  
Auditory Evoked Potentials ◽  
Group Differences ◽  
Central Auditory Processing ◽  
Significant Group ◽  
Children With Hearing Loss ◽  
Cortical Auditory Evoked Potentials

Objective. This study examined the patterns of neural activity in the central auditory system in children with hearing loss.Methods. Cortical potentials and mismatch responses (MMRs) were recorded from ten children aged between 9 and 10 years: five with hearing loss and five with normal hearing in passive oddball paradigms using verbal and nonverbal stimuli.Results. Results indicate a trend toward larger P1 amplitude, a significant reduction in amplitude, and latency of N2 in children with hearing loss compared to control. No significant group differences were observed for the majority of the MMRs conditions.Conclusions. Data suggest that the reduced auditory input affects the pattern of cortical-auditory-evoked potentials in children with a mild to moderately severe hearing loss. Results suggest maturational delays and/or deficits in central auditory processing in children with hearing loss, as indicated by the neurophysiological markers P1 and N2. In contrast, negative MMR data suggest that the amplification provided by the hearing aids could have allowed children with hearing loss to develop adequate discriminative abilities.

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