scholarly journals Relation between cortical auditory evoked potentials and behavioral auditory discrimination in cochlear implant children

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
A A Shalaby ◽  
W A Elkholy ◽  
D M Hassan ◽  
A M Mohamed
Keyword(s):  
Speech Perception ◽  
Evoked Potentials ◽  
Short Duration ◽  
Auditory Evoked Potentials ◽  
Sensory Deprivation ◽  
Spectral Change ◽  
Behavioral Measures ◽  
Auditory Evoked Responses ◽  
Acoustic Change Complex ◽  
Cortical Auditory Evoked Potentials

Abstract Background Cochlear implants (CI) can partially or totally revert the effects of sensory deprivation; thus enabling the development of auditory abilities. However, there remains a large amount of variability in speech perception outcome among CI users. Such variability may be attributed to the children’s diverse capabilities in detecting amplitude, temporal and spectral changes in the incoming complex speech signals in quiet and in difficult listening situations. Objective To study whether the newly introduced Acoustic Change Complex (ACC) cortical potential using short duration can be used to document such variability. If used as a tool for cortical discrimination, it will aid in evaluating young children who cannot be tested using behavioral measures. Patients and Methods Cortical auditory evoked potentials were recorded in forty five unilaterally-implanted children ranging in age from 6 to 12 years. Stimuli used to elicit ACC were short duration (500 msec.) speech and tonal stimuli. Spectral change was done using /i/ to /u/ vowels, while temporal change was done using variable gaps-in-1000 Hz tone, ranging from 5 msec. to 200 msec. Auditory evoked responses were compared to behavioral tests which included speech perception test (PBKG) and psychophysical test for temporal resolution. Results ACC potentials were successfully recorded in most of the children evaluated. Generally, ACC were significantly highly detected in temporal changes than spectral change. Individual data showed that poor behavioral performance was associated with higher ACC detection thresholds to gap in tone and poorer % detection to vowel change. Conclusion: ACC potential using short duration stimuli can be recorded in young implanted children in an ordinary clinical setting. However, more research is needed to document the complex behavioral-objective relationship and its ultimate link to speech perception and language development in young CI recipients.

Physiological Measures and Their Potential for the Assessment of Pediatric Hearing Needs

2015 ◽  
Vol 24 (2) ◽  
pp. 113-116
Author(s):  
Susan A. Small
Keyword(s):  
Speech Perception ◽  
Evoked Potentials ◽  
Clinical Application ◽  
Auditory Evoked Potentials ◽  
Auditory Information ◽  
Complex Data ◽  
Physiological Measures ◽  
Acoustic Change Complex ◽  
Cortical Auditory Evoked Potentials ◽  
Onset Response

Purpose The purpose of this article is to discuss how cortical auditory evoked potentials might be used to assess speech perception capacity in infants, including acoustic change complex data collected in our laboratory. This article is a summary of a paper presented at the HEaring Across the Lifespan (HEAL) Conference held June 5–7, 2014, in Cernobbio, Italy. Method Highlights from data collected in infants and the main issues needing investigation for clinical application are presented. Conclusions Preliminary studies show promising results for the acoustic change complex and confirm that further inquiry into its clinical application is warranted. The presence of an onset response can be used clinically to confirm that auditory information has reached the cortex; however, the absence of a response cannot be interpreted with confidence.

scholarly journals A Set of Time-and-Frequency-Localized Short-Duration Speech-Like Stimuli for Assessing Hearing-Aid Performance via Cortical Auditory-Evoked Potentials

2019 ◽  
Vol 23 ◽  
pp. 233121651988556
Author(s):  
Michael A. Stone ◽  
Anisa Visram ◽  
James M. Harte ◽  
Kevin J. Munro
Keyword(s):  
Evoked Potentials ◽  
Short Duration ◽  
Hearing Aids ◽  
Clinical Setting ◽  
Auditory Evoked Potentials ◽  
British Society ◽  
Worst Case ◽  
Electrophysiological Response ◽  
Digital Hearing Aids ◽  
Cortical Auditory Evoked Potentials

Short-duration speech-like stimuli, for example, excised from running speech, can be used in the clinical setting to assess the integrity of the human auditory pathway at the level of the cortex. Modeling of the cochlear response to these stimuli demonstrated an imprecision in the location of the spectrotemporal energy, giving rise to uncertainty as to what and when of a stimulus caused any evoked electrophysiological response. This article reports the development and assessment of four short-duration, limited-bandwidth stimuli centered at low, mid, mid-high, and high frequencies, suitable for free-field delivery and, in addition, reproduction via hearing aids. The durations were determined by the British Society of Audiology recommended procedure for measuring Cortical Auditory-Evoked Potentials. The levels and bandwidths were chosen via a computational model to produce uniform cochlear excitation over a width exceeding that likely in a worst-case hearing-impaired listener. These parameters produce robustness against errors in insertion gains, and variation in frequency responses, due to transducer imperfections, room modes, and age-related variation in meatal resonances. The parameter choice predicts large spectral separation between adjacent stimuli on the cochlea. Analysis of the signals processed by examples of recent digital hearing aids mostly show similar levels of gain applied to each stimulus, independent of whether the stimulus was presented in isolation, bursts, continuous, or embedded in continuous speech. These stimuli seem to be suitable for measuring hearing-aided Cortical Auditory-Evoked Potentials and have the potential to be of benefit in the clinical setting.

Speech perception and cortical auditory evoked potentials in cochlear implant users with auditory neuropathy spectrum disorders

2012 ◽  
Vol 76 (9) ◽  
pp. 1332-1338 ◽  
Author(s):  
Kátia F. Alvarenga ◽  
Raquel Beltrão Amorim ◽  
Raquel Sampaio Agostinho-Pesse ◽  
Orozimbo Alves Costa ◽  
Leandra Tabanez Nascimento ◽  
...  
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Auditory Neuropathy ◽  
Spectrum Disorders ◽  
Cortical Auditory Evoked Potentials

New possibility for measuring the cortical auditory evoked potentials: the HEARLab

2014 ◽  
Vol 155 (38) ◽  
pp. 1524-1529
Author(s):  
Ádám Bach ◽  
Ferenc Tóth ◽  
Vera Matievics ◽  
József Géza Kiss ◽  
József Jóri ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Evoked Potentials ◽  
Auditory System ◽  
Hearing Aids ◽  
Pure Tone ◽  
Auditory Evoked Potentials ◽  
Normal Hearing ◽  
Speech Stimuli ◽  
Novel Method ◽  
Cortical Auditory Evoked Potentials

Introduction: Cortical auditory evoked potentials can provide objective information about the highest level of the auditory system. Aim: The purpose of the authors was to introduce a new tool, the “HEARLab” which can be routinely used in clinical practice for the measurement of the cortical auditory evoked potentials. In addition, they wanted to establish standards of the analyzed parameters in subjects with normal hearing. Method: 25 adults with normal hearing were tested with speech stimuli, and frequency specific examinations were performed utilizing pure tone stimuli. Results: The findings regarding the latency and amplitude analyses of the evoked potentials confirm previously published results of this novel method. Conclusions: The HEARLAb can be a great help when performance of the conventional audiological examinations is complicated. The examination can be performed in uncooperative subjects even in the presence of hearing aids. The test is frequency specific and does not require anesthesia. Orv. Hetil., 2014, 155(38), 1524–1529.

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