Cortical Electric Response Audiometry Hearing Threshold Estimation: Accuracy, Speed, and the Effects of Stimulus Presentation Features

Lightfoot, Guy; Kennedy, Vicki

doi:10.1097/01.aud.0000233902.53432.48

Cited by 67 publications

(93 citation statements)

References 21 publications

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“…CAEP stimuli can include pulse trains similar to those used in clinical fittings. Acoustic CAEP thresholds determined using amplitude growth functions of the N1eP2 complex, have been shown to have good correlation with acoustic hearing thresholds (Lightfoot and Kennedy, 2006). CAEPs can be difficult to record clinically, due to the need for placement of scalp electrodes, a relatively long recording time due to the number of repetitions needed and duration of the response, and due to the large effect of attention/sleep state, which is particularly important when testing children.…”

Section: Introductionmentioning

confidence: 99%

Cortical auditory evoked potentials as an objective measure of behavioral thresholds in cochlear implant users

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Cortical auditory evoked potentials as an objective measure of behavioral thresholds in cochlear implant users

et al. 2015

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“…However, the adopted approach facilitates visualising the spectrogram of the evoked response and comparing it to that of the induced response. Given that the shape of evoked responses to tone bursts are documented in previous work [14,15,16], visualising its spectrogram can act as a quality check for methods used. Also, in the WS protocol, it was not clear from previous work if there was an induced response present, or in which frequency band the signal had to be filtered to observe an evoked response.…”

Section: Power Analysesmentioning

confidence: 99%

“…Furthermore, there is no study that may be particularly relevant to assessing hearing-impaired patient's access to speech. The brain's response to repeating pure tones has attracted much attention in audiology and has been shown to be beneficial for objective estimation of the hearing threshold [14,15,16]. For the purpose of finding hearing threshold, the brain response is typically analysed in the time domain focusing on the evoked response [14] to different sound levels of pure tones.…”

Section: Introductionmentioning

confidence: 99%

“…The brain's response to repeating pure tones has attracted much attention in audiology and has been shown to be beneficial for objective estimation of the hearing threshold [14,15,16]. For the purpose of finding hearing threshold, the brain response is typically analysed in the time domain focusing on the evoked response [14] to different sound levels of pure tones. Considerable research effort has gone into improving the detection rate of this response [17] for different conditions, such as in children with auditory neuropathy spectrum disorder [18].…”

Section: Introductionmentioning

confidence: 99%

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Induced activity in EEG in response to auditory stimulation

Hosseini

Bell

Wang

et al. 2015

Biomedical Signal Processing and Control

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The response of the brain to a sensory stimulus may present itself in the electroencephalogram (EEG) as evoked and/or induced activity. While the evoked response is given by peaks and troughs in the signal, time-locked and phase-locked to the stimuli, the induced response is time-but not phase-locked, and can be considered as an increase or a decrease in the power of EEG in a specific frequency band at a specific time range with regard to the stimulus onset. The induced response does not have the same phase following successive stimuli. It is believed that cognition and perception of a stimulus present themselves primarily as the induced response in the EEG. In this paper, the induced response of the brain to auditory speech stimuli is investigated and different approaches to detect induced activity are compared. It is shown that there is an increase in theta and delta power in response to words compared to the baseline, starting around 500 ms after their onset. During this time, there is also an increase in pairwise coherence between the posterior electrodes. In response to tone bursts, a change in pairwise coherence was observed in the beta band starting around 200 ms. To the best of our knowledge, this is the first time such responses have been described using simple protocols without complex stimulus manipulations being involved. Responses in the EEG to speech rather than the more conventional tone-bursts or clicks suggests that it may be feasible to use the EEG as an objective means to demonstrate brain activation to salient real world stimuli. This would be of particular benefit in investigating access to speech in patients who are unable or unwilling to reliably respond to conventional subjective experimental protocols, such as infants.

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“…These waves can provide an index of the neural detection of sound at the level of the cortex (Beagley and Kellogg, 1969;Davis et al, 1967;Hyde, 1997;Lightfoot and Kennedy, 2006;Martin et al, 2007).…”

Section: Introductionmentioning

confidence: 95%