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The Effects of Different Reference Methods on Decision-Making Implications of Auditory Brainstem Response. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:9923214. [PMID: 35432587 PMCID: PMC9012648 DOI: 10.1155/2022/9923214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 03/10/2022] [Indexed: 11/18/2022]
Abstract
Hearing loss is a common disease affecting public health all around the world. In clinic, auditory brainstem response (ABR) has been widely used for the detection of hearing loss based on its convenience and accuracy. The different reference methods directly influence the quality of the ABR waveform which in turn affects the ABR-based diagnosis. Therefore, in this study, a reference electrode standardization technique (REST) was adopted to systematically investigate and evaluate the effect of different reference methods on the quality of ABR waveform in comparison with the conventional average reference (AR) and mean mastoid (MM) methods. In this study, ABR signals induced by click stimulus were acquired via an EEG electrode cap arrays, and those located on the six channels along the midline were compared systemically. The results showed that, when considering the different channels, the ABR in the Cz channel showed the best morphology. Then, the ABR waveforms acquired via the REST method possessed better morphologies with large amplitude (
μV for wave I,
μV for wave III, and
μV for wave V) when compared with the traditional method. Summarily, we found that the REST and MM methods improved the quality of ABR on both amplitude and morphology under different stimulation rates and levels without changing the latencies of ABR when compared with the conventional AR method, suggesting that the REST and MM methods have the potential to help physicians with high accurate ABR-based clinical diagnosis. Moreover, this study might also provide a theoretic basis of reference methods on the acquisition of electroencephalogram over public health issues.
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Lee JH, Lee MY, Choi JE, Jung JY. Auditory Brainstem Response to Paired Click Stimulation as an Indicator of Peripheral Synaptic Health in Noise-Induced Cochlear Synaptopathy. Front Neurosci 2021; 14:596670. [PMID: 33505238 PMCID: PMC7830024 DOI: 10.3389/fnins.2020.596670] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 12/03/2020] [Indexed: 11/22/2022] Open
Abstract
Introduction A defect in the cochlear afferent synapse between the inner hair cells and spiral ganglion neurons, after noise exposure, without changes in the hearing threshold has been reported. Animal studies on auditory evoked potentials demonstrated changes in the auditory brainstem response (ABR) measurements of peak I amplitude and the loss of synapses, which affect the temporal resolution of complex sounds. Human studies of auditory evoked potential have reported ambiguous results regarding the relationship between peak I amplitude and noise exposure. Paired click stimuli have been used to investigate the temporal processing abilities of humans and animals. In this study, we investigated the utility of measuring auditory evoked potentials in response to paired click stimuli to assess the temporal processing function of ribbon synapses in noise-induced cochlear synaptopathy. Materials and Methods Twenty-two Sprague Dawley rats were used in this study, and synaptopathy was induced by narrow-band noise exposure (16 kHz with 1 kHz bandwidth, 105 dB sound pressure level for 2 h). ABRs to tone and paired click stimuli were measured before and 1, 3, 7, and 14 days after noise exposure. For histological analyses, hair cells and ribbon synapses were immunostained and the synapses quantified. The relationships among ABR peak I amplitude, number of synapses, and ABR to paired click stimuli were examined. Results Our results showed that ABR thresholds increase 1 day after noise exposure but fully recover to baseline levels after 14 days. Further, we demonstrated test frequency-dependent decreases in peak I amplitude and the number of synapses after noise exposure. These decreases were statistically significant at frequencies of 16 and 32 kHz. However, the ABR recovery threshold to paired click stimuli increased, which represent deterioration in the ability of temporal auditory processing. Our results indicate that the ABR recovery threshold is highly correlated with ABR peak I amplitude after noise exposure. We also established a direct correlation between the ABR recovery threshold and histological findings. Conclusion The result from this study suggests that in animal studies, the ABR to paired click stimuli along with peak I amplitude has potential as an assessment tool for hidden hearing loss.
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Affiliation(s)
- Jae-Hun Lee
- Department of Otolaryngology Head and Neck Surgery College of Medicine, Dankook University, Cheonan, South Korea
| | - Min Young Lee
- Department of Otolaryngology Head and Neck Surgery College of Medicine, Dankook University, Cheonan, South Korea.,Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, Cheonan, South Korea
| | - Ji Eun Choi
- Department of Otolaryngology Head and Neck Surgery College of Medicine, Dankook University, Cheonan, South Korea.,Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, Cheonan, South Korea
| | - Jae Yun Jung
- Department of Otolaryngology Head and Neck Surgery College of Medicine, Dankook University, Cheonan, South Korea.,Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, Cheonan, South Korea
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Lee JH, Lee MY, Chung PS, Jung JY. Photobiomodulation using low-level 808 nm diode laser rescues cochlear synaptopathy after acoustic overexposure in rat. JOURNAL OF BIOPHOTONICS 2019; 12:e201900145. [PMID: 31240853 DOI: 10.1002/jbio.201900145] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/21/2019] [Accepted: 06/23/2019] [Indexed: 06/09/2023]
Abstract
A certain degree of noise can cause hearing problems without a permanent change in the hearing threshold, which is called hidden hearing loss and results from partial loss of auditory synapses. Photobiomodulation (PBM) enhances neural growth and connections in the peripheral nervous systems. In this study, we assessed whether PBM could rescue cochlear synaptopathy after acoustic overexposure in rat. PBM was performed for 7 days after noise exposure. The auditory brainstem responses (ABRs) were acquired before and after noise exposure using a tone and a paired-click stimulus. Auditory response to paired click sound with short time interval was performed to evaluate auditory temporal processing ability. In the result, hearing threshold recovered 2 weeks after noise exposure in both groups. Peak wave 1 amplitude of the ABR and ABR recovery threshold did not recover in the noise only group, whereas it fully recovered in the noise + PBM group. The number of synaptic ribbons was significantly different in the control and noise only groups, while there was no difference between the control and noise + PBM group. These results indicate that PBM rescued peak wave 1 amplitude and maintained the auditory temporal processing ability resulting from a loss of synaptic ribbons after acoustic overexposure.
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Affiliation(s)
- Jae-Hun Lee
- Beckman Laser Institute Korea, College of Medicine, Dankook University, Cheonan, South Korea
- Interdiscriplinary Program for Medical Laser, College of Medicine, Dankook University, Cheonan, South Korea
| | - Min Young Lee
- Beckman Laser Institute Korea, College of Medicine, Dankook University, Cheonan, South Korea
- Interdiscriplinary Program for Medical Laser, College of Medicine, Dankook University, Cheonan, South Korea
- Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, Cheonan, South Korea
| | - Phil-Sang Chung
- Beckman Laser Institute Korea, College of Medicine, Dankook University, Cheonan, South Korea
- Interdiscriplinary Program for Medical Laser, College of Medicine, Dankook University, Cheonan, South Korea
- Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, Cheonan, South Korea
| | - Jae Yun Jung
- Beckman Laser Institute Korea, College of Medicine, Dankook University, Cheonan, South Korea
- Interdiscriplinary Program for Medical Laser, College of Medicine, Dankook University, Cheonan, South Korea
- Department of Otolaryngology Head and Neck Surgery, Dankook University Hospital, Cheonan, South Korea
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Burghard A, Voigt MB, Kral A, Hubka P. Categorical processing of fast temporal sequences in the guinea pig auditory brainstem. Commun Biol 2019; 2:265. [PMID: 31341964 PMCID: PMC6642126 DOI: 10.1038/s42003-019-0472-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 05/23/2019] [Indexed: 11/21/2022] Open
Abstract
Discrimination of temporal sequences is crucial for auditory object recognition, phoneme categorization and speech understanding. The present study shows that auditory brainstem responses (ABR) to pairs of noise bursts separated by a short gap can be classified into two distinct groups based on the ratio of gap duration to initial noise burst duration in guinea pigs. If this ratio was smaller than 0.5, the ABR to the trailing noise burst was strongly suppressed. On the other hand, if the initial noise burst duration was short compared to the gap duration (a ratio greater than 0.5), a release from suppression and/or enhancement of the trailing ABR was observed. Consequently, initial noise bursts of shorter duration caused a faster transition between response classes than initial noise bursts of longer duration. We propose that the described findings represent a neural correlate of subcortical categorical preprocessing of temporal sequences in the auditory system.
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Affiliation(s)
- Alice Burghard
- Institute of Audioneurotechnology & Department of Experimental Otology, ENT Clinics, Hannover Medical School, Hannover, D-30625 Germany
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT 06030 USA
| | - Mathias Benjamin Voigt
- Institute of Audioneurotechnology & Department of Experimental Otology, ENT Clinics, Hannover Medical School, Hannover, D-30625 Germany
| | - Andrej Kral
- Institute of Audioneurotechnology & Department of Experimental Otology, ENT Clinics, Hannover Medical School, Hannover, D-30625 Germany
| | - Peter Hubka
- Institute of Audioneurotechnology & Department of Experimental Otology, ENT Clinics, Hannover Medical School, Hannover, D-30625 Germany
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Reichert MS, Höbel G. Frequency channel-dependent selectivity for temporal call characteristics in gray treefrogs, Hyla versicolor. J Exp Biol 2017; 220:1256-1266. [PMID: 28104800 DOI: 10.1242/jeb.152330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 01/11/2017] [Indexed: 11/20/2022]
Abstract
Sensory receptors transmit information on multiple stimulus dimensions. Much remains to be understood about how the processing of different signal characteristics is partitioned and integrated in different areas of the nervous system. Amphibian hearing involves two morphologically distinct inner-ear organs that process different components of the frequency spectrum. Many anuran signals contain two frequency peaks, each one matching the sensitivity of one of these two organs. We hypothesized that the processing of temporal characteristics of acoustic signals would differ in these two frequency channels, perhaps because of differences in the response properties of the two inner-ear organs. We tested this hypothesis in the gray treefrog, Hyla versicolor; male advertisement calls of this species contain a bimodal frequency spectrum. We generated synthetic male advertisement calls in which we independently manipulated the pattern of amplitude modulation in the low-frequency peak or the high-frequency peak and measured the attractiveness of these stimuli to females in single-speaker and two-speaker phonotaxis tests. We obtained multiple lines of evidence that females were more selective for fine-temporal characteristics in the high-frequency peak. We discuss the potential implications of frequency channel-dependent temporal processing for signal evolution and suggest that additional neurophysiological investigations of the anuran auditory periphery will give important insights into how the nervous system partitions the encoding of multiple characteristics of complex signals.
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Affiliation(s)
- Michael S Reichert
- Department of Biological Sciences, University of Wisconsin, 3209 N. Maryland Avenue, Milwaukee, WI 53201, USA
| | - Gerlinde Höbel
- Department of Biological Sciences, University of Wisconsin, 3209 N. Maryland Avenue, Milwaukee, WI 53201, USA
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Cochlear, brainstem, and psychophysical responses show spectrotemporal tradeoff in human auditory processing. Neuroreport 2017; 28:17-22. [DOI: 10.1097/wnr.0000000000000714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Luís AR, Couchinho MN, dos Santos ME. A Quantitative Analysis of Pulsed Signals Emitted by Wild Bottlenose Dolphins. PLoS One 2016; 11:e0157781. [PMID: 27383211 PMCID: PMC4934784 DOI: 10.1371/journal.pone.0157781] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 06/03/2016] [Indexed: 11/29/2022] Open
Abstract
Common bottlenose dolphins (Tursiops truncatus), produce a wide variety of vocal emissions for communication and echolocation, of which the pulsed repertoire has been the most difficult to categorize. Packets of high repetition, broadband pulses are still largely reported under a general designation of burst-pulses, and traditional attempts to classify these emissions rely mainly in their aural characteristics and in graphical aspects of spectrograms. Here, we present a quantitative analysis of pulsed signals emitted by wild bottlenose dolphins, in the Sado estuary, Portugal (2011–2014), and test the reliability of a traditional classification approach. Acoustic parameters (minimum frequency, maximum frequency, peak frequency, duration, repetition rate and inter-click-interval) were extracted from 930 pulsed signals, previously categorized using a traditional approach. Discriminant function analysis revealed a high reliability of the traditional classification approach (93.5% of pulsed signals were consistently assigned to their aurally based categories). According to the discriminant function analysis (Wilk’s Λ = 0.11, F3, 2.41 = 282.75, P < 0.001), repetition rate is the feature that best enables the discrimination of different pulsed signals (structure coefficient = 0.98). Classification using hierarchical cluster analysis led to a similar categorization pattern: two main signal types with distinct magnitudes of repetition rate were clustered into five groups. The pulsed signals, here described, present significant differences in their time-frequency features, especially repetition rate (P < 0.001), inter-click-interval (P < 0.001) and duration (P < 0.001). We document the occurrence of a distinct signal type–short burst-pulses, and highlight the existence of a diverse repertoire of pulsed vocalizations emitted in graded sequences. The use of quantitative analysis of pulsed signals is essential to improve classifications and to better assess the contexts of emission, geographic variation and the functional significance of pulsed signals.
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Affiliation(s)
- Ana Rita Luís
- MARE–Marine and Environmental Sciences Centre, ISPA–Instituto Universitário, Lisboa, Portugal
- Projecto Delfim–Centro Português de Estudo dos Mamíferos Marinhos, Lisboa, Portugal
- * E-mail:
| | - Miguel N. Couchinho
- MARE–Marine and Environmental Sciences Centre, ISPA–Instituto Universitário, Lisboa, Portugal
- Projecto Delfim–Centro Português de Estudo dos Mamíferos Marinhos, Lisboa, Portugal
| | - Manuel E. dos Santos
- MARE–Marine and Environmental Sciences Centre, ISPA–Instituto Universitário, Lisboa, Portugal
- Projecto Delfim–Centro Português de Estudo dos Mamíferos Marinhos, Lisboa, Portugal
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Bidelman GM, Jennings SG, Strickland EA. PsyAcoustX: A flexible MATLAB(®) package for psychoacoustics research. Front Psychol 2015; 6:1498. [PMID: 26528199 PMCID: PMC4601020 DOI: 10.3389/fpsyg.2015.01498] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 09/17/2015] [Indexed: 11/21/2022] Open
Abstract
The demands of modern psychophysical studies require precise stimulus delivery and flexible platforms for experimental control. Here, we describe PsyAcoustX, a new, freely available suite of software tools written in the MATLAB(®) environment to conduct psychoacoustics research on a standard PC. PsyAcoustX provides a flexible platform to generate and present auditory stimuli in real time and record users' behavioral responses. Data are automatically logged by stimulus condition and aggregated in an exported spreadsheet for offline analysis. Detection thresholds can be measured adaptively under basic and complex auditory masking tasks and other paradigms (e.g., amplitude modulation detection) within minutes. The flexibility of the module offers experimenters access to nearly every conceivable combination of stimulus parameters (e.g., probe-masker relations). Example behavioral applications are highlighted including the measurement of audiometric thresholds, basic simultaneous and non-simultaneous (i.e., forward and backward) masking paradigms, gap detection, and amplitude modulation detection. Examples of these measurements are provided including the psychoacoustic phenomena of temporal overshoot, psychophysical tuning curves, and temporal modulation transfer functions. Importantly, the core design of PsyAcoustX is easily modifiable, allowing users the ability to adapt its basic structure and create additional modules for measuring discrimination/detection thresholds for other auditory attributes (e.g., pitch, intensity, etc.) or binaural paradigms.
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Affiliation(s)
- Gavin M. Bidelman
- Institute for Intelligent Systems, University of Memphis, MemphisTN, USA
- School of Communication Sciences and Disorders, University of Memphis, MemphisTN, USA
| | - Skyler G. Jennings
- Department of Communication Sciences and Disorders, University of Utah, Salt Lake CityUT, USA
| | - Elizabeth A. Strickland
- Department of Speech, Language, and Hearing Sciences, Purdue University, West LafayetteIN, USA
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Bidelman GM, Schug JM, Jennings SG, Bhagat SP. Psychophysical auditory filter estimates reveal sharper cochlear tuning in musicians. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2014; 136:EL33-EL39. [PMID: 24993235 DOI: 10.1121/1.4885484] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Musicianship confers enhancements to hearing at nearly all levels of the auditory system from periphery to percept. Musicians' superior psychophysical abilities are particularly evident in spectral discrimination and noise-degraded listening tasks, achieving higher perceptual sensitivity than their nonmusician peers. Greater spectral acuity implies that musicianship may increase auditory filter selectivity. This hypothesis was directly tested by measuring both forward- and simultaneous-masked psychophysical tuning curves. Sharper filter tuning (i.e., higher Q10) was observed in musicians compared to nonmusicians. Findings suggest musicians' pervasive listening benefits may be facilitated, in part, by superior spectral processing/decomposition as early as the auditory periphery.
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Affiliation(s)
- Gavin M Bidelman
- Institute for Intelligent Systems, University of Memphis, Memphis, Tennessee 38105
| | - Jonathan M Schug
- School of Communication Sciences & Disorders, University of Memphis, Memphis, Tennessee 38105
| | - Skyler G Jennings
- Department of Communication Sciences & Disorders, University of Utah, Salt Lake City, Utah 84112
| | - Shaum P Bhagat
- School of Communication Sciences & Disorders, University of Memphis, Memphis, Tennessee 38105
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