Habituation and Dishabituation of the Averaged Auditory Evoked Response

1970 ◽  
Vol 13 (2) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce A. Weber
Keyword(s):  
Young Adults ◽  
Stimulus Duration ◽  
Simple Form ◽  
Stimulus Frequency ◽  
Auditory Stimulation ◽  
Normal Hearing ◽  
Evoked Response ◽  
Auditory Evoked Response ◽  
Normal Adults

Two experiments investigated amplitude reduction in the averaged evoked response (AER) resulting from repeated auditory stimulation. The first experiment examined the effects of stimulus duration on the rate of AER habituation. Three groups of 10 normal-hearing young adults received 16 series of 1000-Hz tone bursts with durations of 50 msec, 500 msec, and 950 msec. A comparison of AER habituation rates revealed that longer stimulus durations resulted in faster rates of habituation. The second experiment was designed to determine if the AER demonstrated dishabituation (recovery of a habituated response when a parameter of the habituating stimulus is changed). Ten additional normal adults received series of 1000-Hz tone bursts. When the stimulus frequency was changed from 1000 Hz to 500 Hz, all subjects meeting the habituation criterion demonstrated recovery of the AER. The results of the two experiments are compatible with an interpretation of AER habituation as a simple form of learning.

The Onset–Offset N1–P2 Auditory Evoked Response in Individuals With High-Frequency Sensorineural Hearing Loss: Responses to Broadband Noise

2021 ◽  
pp. 1-10
Author(s):  
Jennifer E. Gonzalez ◽  
Frank E. Musiek
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Stimulus Duration ◽  
High Frequency ◽  
Repeated Measures ◽  
Normal Hearing ◽  
Broadband Noise ◽  
Evoked Response ◽  
Sensorineural Hearing ◽  
Auditory Evoked Response

Purpose Clinical use of electrophysiologic measures has been limited to use of brief stimuli to evoke responses. While brief stimuli elicit onset responses in individuals with normal hearing and normal central auditory nervous system (CANS) function, responses represent the integrity of a fraction of the mainly excitatory central auditory neurons. Longer stimuli could provide information regarding excitatory and inhibitory CANS function. Our goal was to measure the onset–offset N1–P2 auditory evoked response in subjects with normal hearing and subjects with moderate high-frequency sensorineural hearing loss (HFSNHL) to determine whether the response can be measured in individuals with moderate HFSNHL and, if so, whether waveform components differ between participant groups. Method Waveforms were obtained from 10 participants with normal hearing and seven participants with HFSNHL aged 40–67 years using 2,000-ms broadband noise stimuli with 40-ms rise–fall times presented at 50 dB SL referenced to stimulus threshold. Amplitudes and latencies were analyzed via repeated-measures analysis of variance (ANOVA). N1 and P2 onset latencies were compared to offset counterparts via repeated-measures ANOVA after subtracting 2,000 ms from the offset latencies to account for stimulus duration. Offset-to-onset trough-to-peak amplitude ratios between groups were compared using a one-way ANOVA. Results Responses were evoked from all participants. There were no differences between participant groups for the waveform components measured. Response × Participant Group interactions were not significant. Offset N1–P2 latencies were significantly shorter than onset counterparts after adjusting for stimulus duration (normal hearing: 43 ms shorter; HFSNHL: 47 ms shorter). Conclusions Onset–offset N1–P2 responses were resistant to moderate HFSNHL. It is likely that the onset was elicited by the presentation of a sound in silence and the offset by the change in stimulus envelope from plateau to fall, suggesting an excitatory onset response and an inhibitory-influenced offset response. Results indicated this protocol can be used to investigate CANS function in individuals with moderate HFSNHL. Supplemental Material https://doi.org/10.23641/asha.14669007

The Averaged Evoked Response to Auditory Stimulation

1966 ◽  
Vol 9 (3) ◽  
pp. 361-370 ◽  
Author(s):  
Lloyd L. Price ◽  
Benjamin Rosenblüt ◽  
Robert Goldstein ◽  
David C. Shepherd
Keyword(s):  
Contralateral Side ◽  
Auditory Stimulation ◽  
Normal Hearing ◽  
Evoked Response ◽  
Auditory Stimuli ◽  
Frequency Of Occurrence ◽  
Ipsilateral Side ◽  
The Subject ◽  
Positive Peak ◽  
Older Subjects

Evoked responses of 160 normal-hearing subjects to auditory stimuli (clicks) were recorded, and data related to the latency, amplitude, and frequency of occurrence of various late components were studied. Negative peaks (vertex referred to earlobe) at 85 and 260 msec and a positive peak at 160 msec occurred often enough and with sufficient amplitude to be useful as indicators of response to auditory stimulation. Frequency of occurrence and latency did not appear related to the race, sex, or age of the subject nor to the side of the head from which the recording was taken. The amplitudes are related to these variables. White subjects gave larger responses than colored subjects, females gave larger responses than males, younger and older subjects gave larger responses than those in between, and the responses from the contralateral side of the head (re stimulated ear) tended to be larger than those from the ipsilateral side. Thresholds for the evoked response to clicks are very near voluntary thresholds for the same stimuli in normal-hearing young adults.

Seeing the Intensity of a Sound-producing Event Modulates the Amplitude of the Initial Auditory Evoked Response

2020 ◽  
Vol 32 (3) ◽  
pp. 426-434
Author(s):  
Sol Libesman ◽  
Damien J. Mannion ◽  
Thomas J. Whitford
Keyword(s):  
Visual Information ◽  
Auditory Stimulation ◽  
Sound Level ◽  
Evoked Response ◽  
Auditory Evoked Potential ◽  
Neural Responses ◽  
Auditory Event ◽  
Auditory Evoked Response ◽  
Auditory Responses ◽  
Sound Levels

An auditory event is often accompanied by characteristic visual information. For example, the sound level produced by a vigorous handclap may be related to the speed of hands as they move toward collision. Here, we tested the hypothesis that visual information about the intensity of auditory signals are capable of altering the subsequent neurophysiological response to auditory stimulation. To do this, we used EEG to measure the response of the human brain ( n = 28) to the audiovisual delivery of handclaps. Depictions of a weak handclap were accompanied by auditory handclaps at low (65 dB) and intermediate (72.5 dB) sound levels, whereas depictions of a vigorous handclap were accompanied by auditory handclaps at intermediate (72.5 dB) and high (80 dB) sound levels. The dependent variable was the amplitude of the initial negative component (N1) of the auditory evoked potential. We find that identical clap sounds (intermediate level; 72.5 dB) elicited significantly lower N1 amplitudes when paired with a video of a weak clap, compared with when paired with a video of a vigorous clap. These results demonstrate that intensity predictions can affect the neural responses to auditory stimulation at very early stages (<100 msec) in sensory processing. Furthermore, the established sound-level dependence of auditory N1 amplitude suggests that such effects may serve the functional role of altering auditory responses in accordance with visual inferences. Thus, this study provides evidence that the neurally evoked response to an auditory event results from a combination of a person's beliefs with incoming auditory input.

Relation Between Sound Intensity and the Latency and Amplitude of the Brainstem Auditory Evoked Response

1978 ◽  
Vol 21 (2) ◽  
pp. 401-407 ◽  
Author(s):  
Janis A. Wolfe ◽  
Paul Skinner ◽  
John Burns
Keyword(s):  
Signal Intensity ◽  
Linear Growth ◽  
Sound Intensity ◽  
Normal Hearing ◽  
Evoked Response ◽  
Peak Latency ◽  
Peak Amplitude ◽  
Adult Males ◽  
Auditory Evoked Response ◽  
Brainstem Auditory Evoked Response

This study investigated the relation of peak amplitude and latency to signal intensity for the brainstem auditory evoked response (BSAER). One thousand clicks were presented to obtain each averaged response. Responses were obtained to clicks presented at sensation levels of 15, 20, 30, 40, 50, 60, and 70 dB. Five adult males who demonstrated normal hearing served as subjects. Latency and amplitude for various wavelets were plotted against signal intensity. A consistent trend of decreased peak latency occurred with increased signal intensity. Contrary to previous reports, the amplitude of Wavelet V showed a linear growth with increased signal intensity.

scholarly journals Diagnostic reference data for the Monaural Brain-stem Auditory Evoked Response (BAER)

1990 ◽  
Vol 37 (1) ◽  
Author(s):  
Cyril D. Govender
Keyword(s):  
Brain Stem ◽  
Reference Data ◽  
Amplitude Ratio ◽  
Normal Hearing ◽  
Clinical Applications ◽  
Evoked Response ◽  
Relative Amplitude ◽  
Auditory Evoked Response ◽  
Amplitude Data ◽  
The Absolute

The objective of the investigation was to established diagnostic reference data for the normal BAER. BAERs were elicited from the target (R) ear using clicks presented at 70dBnHL. Relevant latency and amplitude data were obtained from 60 selected normal hearing Indian undergraduate females (N=30; X age = 20.33 years) students aged between 18 and 25 years (X age = 20.73 Years). Diagnostic reference data were established for the absolute latencies of peaks I to VI; relative latencies of peaks I-III; III-V and I-V; absolute amplitudes of peaks I and V and the relative amplitude ratio of peaks V:I. These results are discussed in terms of the literature and implications for clinical applications and further research.

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