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Joseph A Sisneros - One of the best experts on this subject based on the ideXlab platform.
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ontogeny of Auditory saccular sensitivity in the plainfin midshipman fish porichthys notatus
Journal of Comparative Physiology A-neuroethology Sensory Neural and Behavioral Physiology, 2011Co-Authors: Peter W. Alderks, Joseph A SisnerosAbstract:The Auditory system of the plainfin midshipman fish, Porichthys notatus, is an important sensory receiver system used to encode intraspecific social communication signals in adults, but the response properties and function of this receiver system in pre-adult stages are less known. In this study we examined the response properties of Auditory-evoked potentials from the midshipman saccule, the main organ of hearing in this species, to determine whether the frequency response and Auditory Threshold of saccular hair cells to behaviorally relevant single tone stimuli change during ontogeny. Saccular potentials were recorded from three relative sizes of midshipman fish: small juveniles [1.9–3.1 cm standard length (SL), large juveniles (6.8–8.0 cm SL) and non-reproductive adults (9.0–22.6 cm SL)]. The Auditory evoked potentials were recorded from the rostral, middle and caudal regions of the saccule while single tone stimuli (75–1,025 Hz) were presented via an underwater speaker. We show that the frequency response and Auditory Threshold of the midshipman saccule is established early in development and retained throughout ontogeny. We also show that saccular sensitivity to frequencies greater than 385 Hz increases with age/size and that the midshipman saccule of small and large juveniles, like that of non-reproductive adults, is best suited to detect low frequency sounds (<105 Hz) in their natural acoustic environment.
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Auditory saccular potentials of the little skate raja erinacea
Journal of the Acoustical Society of America, 2009Co-Authors: Joseph A SisnerosAbstract:Previous behavioral studies have shown that elasmobranch fishes can be attracted to low‐frequency sound sources (< 80 Hz) in their natural habitat, but relatively few studies have characterized the Auditory response properties of the elasmobranch inner ear to low‐frequency sounds. Here, we examine the response properties of evoked saccular potentials from the skate inner ear to determine the Auditory Threshold sensitivity and frequency response of saccular hair cells to low‐frequency stimuli. Saccular potentials were recorded from the medial region of the saccule while sound was generated using a shaker table designed to mimic the particle motion component of sound. Four test frequencies (50, 64, 84, and 100 Hz) and 11 directions were used to characterize the displacement sensitivity, frequency response, and directional response properties of the skate saccule. Saccular potentials were evoked and measured at twice the stimulus frequency in vivo using a wave analyzer, while stimuli were generated via the s...
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Saccular potentials of the vocal plainfin midshipman fish, Porichthys notatus
Journal of Comparative Physiology A, 2007Co-Authors: Joseph A SisnerosAbstract:The plainfin midshipman fish, Porichthys notatus , is a vocal species of teleost fish that generates acoustic signals for intraspecific communication during social and reproductive behaviors. All adult morphs (females and males) produce single short duration grunts important for agonistic encounters, but only nesting males produce trains of grunts and growls in agonistic contexts and long duration multiharmonic advertisement calls to attract gravid females for spawning. The midshipman fish uses the saccule as the main acoustic endorgan for hearing to detect and locate vocalizing conspecifics. Here, I examined the response properties of evoked potentials from the midshipman saccule to determine the frequency response and Auditory Threshold sensitivity of saccular hair cells to behaviorally-relevant single tone stimuli. Saccular potentials were recorded from the rostral, medial and caudal regions of the saccule while sound was presented by an underwater speaker. Saccular potentials of the midshipman, like other teleosts, were evoked greatest at a frequency that was twice the stimulus frequency. Results indicate that midshipman saccular hair cells of non-reproductive adults had a peak frequency sensitivity that ranged from 75 (lowest frequency tested) to 145 Hz and were best suited to detect the low frequency components (≤105 Hz) of midshipman vocalizations.
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Ontogenetic changes in the response properties of individual, primary Auditory afferents in the vocal plainfin midshipman fish Porichthys notatus Girard.
Journal of Experimental Biology, 2005Co-Authors: Joseph A Sisneros, Andrew H. BassAbstract:SUMMARY The Auditory system of adult midshipman fish Porichthys notatus Girard is an important sensory receiver system used during intraspecific social communication to encode conspecific vocalizations, but the response properties and function of this system in the pre-adult stages are unknown. Midshipman fish, like other teleosts, use the saccule as the main acoustic end organ of the inner ear. In this study, we examined the discharge properties and the frequency response dynamics of Auditory saccular afferent neurons in pre-adult midshipman (∼4–12 months of age) to determine whether encoding of Auditory information, inclusive of conspecific vocalizations, changes across life history stages. Extracellular single unit recordings were made from saccular afferents while sound was presented via an underwater speaker. Comparisons with adult data show that the resting discharge rate and Auditory Threshold sensitivity increased with age/size, while temporal encoding of frequency did not show any significant shifts. The results indicate that the saccular afferents of juveniles, like those of non-reproductive adults, are best adapted to temporally encode the low frequency components (≤100 Hz) of midshipman vocalizations. This report represents the first in vivo investigation of age-related changes in the encoding properties of individual Auditory neurons for any fish species.
Ze D Jiang - One of the best experts on this subject based on the ideXlab platform.
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no close correlation between brainstem Auditory function and peripheral Auditory Threshold in preterm infants at term age
Clinical Neurophysiology, 2008Co-Authors: Rong Yin, Ze D Jiang, Andrew R Wilkinson, Chao Chen, Dorothea M BrosiAbstract:Abstract Objective To determine whether central Auditory function in preterm infants correlates with peripheral Auditory Threshold and whether Threshold elevation affects central Auditory function. Methods Brainstem Auditory evoked response (BAER) was recorded at term age using maximum length sequence (MLS) with 91–910/s clicks in 133 preterm infants (gestation 28–36 weeks). The relationship between MLS BAER variables and BAER Threshold was analyzed. Results The latencies and amplitudes of all MLS BAER waves correlated significantly with BAER Threshold. However, no correlation was found between MLS BAER interpeak intervals and BAER Threshold at any rates. In preterm infants with a Threshold >20dB n HL ( n =30), MLS BAER wave latencies were all significantly longer than in those with a Threshold ⩽20dB n HL ( n =103) ( P n HL ( P Conclusions Brainstem Auditory function does not closely correlate with peripheral Auditory Threshold at term in preterm infants. Elevation in peripheral Threshold due to middle ear disorders does not significantly affect functional status of the Auditory brainstem. Significance Short term peripheral conductive Auditory abnormality does not significantly affect the immature central Auditory function.
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does peripheral Auditory Threshold correlate with brainstem Auditory function at term in preterm infants
Acta Oto-laryngologica, 2006Co-Authors: Ze D Jiang, Andrew R WilkinsonAbstract:Conclusion. Peripheral Auditory Threshold does not correlate with brainstem Auditory function in preterm infants. Infants with peripheral Auditory abnormality seem not to be necessarily more prone to brainstem Auditory abnormality than those without the elevation, although further studies are needed in a larger number of subjects. Objective. To investigate whether peripheral Auditory Threshold correlates with brainstem Auditory function in preterm infants and shed light on whether preterm infants with Threshold elevation are prone to central Auditory abnormality. Patients and methods. Brainstem Auditory evoked response (BAER) was recorded with clicks at term in preterm infants (gestation 28–36 weeks). Analysis of correlation was made between BAER Threshold and various BAER components. BAER data were compared between preterm infants with Thresholds ≤20 dB nHL (n=113) and those >20 dB (n=32). Results. Although BAER Threshold correlated significantly with BAER wave latencies and amplitudes, the Threshold did...
Massimo Grassi - One of the best experts on this subject based on the ideXlab platform.
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psychoacoustics a comprehensive matlab toolbox for Auditory testing
Frontiers in Psychology, 2014Co-Authors: Alessandro Soranzo, Massimo GrassiAbstract:PSYCHOACOUSTICS is a new MATLAB toolbox which implements three classic adaptive procedures for Auditory Threshold estimation. The first includes those of the Staircase family (method of limits, simple up-down and transformed up-down); the second is the Parameter Estimation by Sequential Testing (PEST); and the third is the Maximum Likelihood Procedure (MLP). The toolbox comes with more than twenty built-in experiments each provided with the recommended (default) parameters. However, if desired, these parameters can be modified through an intuitive and user friendly graphical interface and stored for future use (no programming skills are required). Finally, PSYCHOACOUSTICS is very flexible as it comes with several signal generators and can be easily extended for any experiment.
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psychoacoustics a comprehensive matlab toolbox for Auditory testing
Frontiers in Psychology, 2014Co-Authors: Alessandro Soranzo, Massimo GrassiAbstract:PSYCHOACOUSTICS is a new MATLAB toolbox which implements three classic adaptive procedures for Auditory Threshold estimation. The first includes those of the Staircase family (method of limits, simple up-down and transformed up-down); the second is the Parameter Estimation by Sequential Testing (PEST); and the third is the Maximum Likelihood Procedure (MLP). The toolbox comes with more than twenty built-in experiments each provided with the recommended (default) parameters. However, if desired, these parameters can be modified through an intuitive and user friendly graphical interface and stored for future use (no programming skills are required). Finally, PSYCHOACOUSTICS is very flexible as it comes with several signal generators and can be easily extended for any experiment.
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mlp a matlab toolbox for rapid and reliable Auditory Threshold estimation
Behavior Research Methods, 2009Co-Authors: Massimo Grassi, Alessandro SoranzoAbstract:In this article, we present MLP, a MATLAB toolbox enabling Auditory Thresholds estimation via the adaptive maximum likelihood procedure proposed by David Green (1990, 1993). This adaptive procedure is particularly appealing for those psychologists who need to estimate Thresholds with a good degree of accuracy and in a short time. Together with a description of the toolbox, the present text provides an introduction to the Threshold estimation theory and a theoretical explanation of the maximum likelihood adaptive procedure. MLP comes with a graphical interface, and it is provided with several built-in, classic psychoacoustics experiments ready to use at a mouse click.
Alessandro Soranzo - One of the best experts on this subject based on the ideXlab platform.
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psychoacoustics a comprehensive matlab toolbox for Auditory testing
Frontiers in Psychology, 2014Co-Authors: Alessandro Soranzo, Massimo GrassiAbstract:PSYCHOACOUSTICS is a new MATLAB toolbox which implements three classic adaptive procedures for Auditory Threshold estimation. The first includes those of the Staircase family (method of limits, simple up-down and transformed up-down); the second is the Parameter Estimation by Sequential Testing (PEST); and the third is the Maximum Likelihood Procedure (MLP). The toolbox comes with more than twenty built-in experiments each provided with the recommended (default) parameters. However, if desired, these parameters can be modified through an intuitive and user friendly graphical interface and stored for future use (no programming skills are required). Finally, PSYCHOACOUSTICS is very flexible as it comes with several signal generators and can be easily extended for any experiment.
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psychoacoustics a comprehensive matlab toolbox for Auditory testing
Frontiers in Psychology, 2014Co-Authors: Alessandro Soranzo, Massimo GrassiAbstract:PSYCHOACOUSTICS is a new MATLAB toolbox which implements three classic adaptive procedures for Auditory Threshold estimation. The first includes those of the Staircase family (method of limits, simple up-down and transformed up-down); the second is the Parameter Estimation by Sequential Testing (PEST); and the third is the Maximum Likelihood Procedure (MLP). The toolbox comes with more than twenty built-in experiments each provided with the recommended (default) parameters. However, if desired, these parameters can be modified through an intuitive and user friendly graphical interface and stored for future use (no programming skills are required). Finally, PSYCHOACOUSTICS is very flexible as it comes with several signal generators and can be easily extended for any experiment.
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mlp a matlab toolbox for rapid and reliable Auditory Threshold estimation
Behavior Research Methods, 2009Co-Authors: Massimo Grassi, Alessandro SoranzoAbstract:In this article, we present MLP, a MATLAB toolbox enabling Auditory Thresholds estimation via the adaptive maximum likelihood procedure proposed by David Green (1990, 1993). This adaptive procedure is particularly appealing for those psychologists who need to estimate Thresholds with a good degree of accuracy and in a short time. Together with a description of the toolbox, the present text provides an introduction to the Threshold estimation theory and a theoretical explanation of the maximum likelihood adaptive procedure. MLP comes with a graphical interface, and it is provided with several built-in, classic psychoacoustics experiments ready to use at a mouse click.
Weiliang Xia - One of the best experts on this subject based on the ideXlab platform.
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an unusually powerful mode of low frequency sound interference due to defective hair bundles of the Auditory outer hair cells
Proceedings of the National Academy of Sciences of the United States of America, 2014Co-Authors: Kazusaku Kamiya, Vincent Michel, Fabrice Giraudet, Brigitte Riederer, Isabelle Foucher, Samantha Papal, Isabelle Perfettini, Sebastien Le Gal, Elisabeth Verpy, Weiliang XiaAbstract:A detrimental perceptive consequence of damaged Auditory sensory hair cells consists in a pronounced masking effect exerted by low-frequency sounds, thought to occur when Auditory Threshold elevation substantially exceeds 40 dB. Here, we identified the submembrane scaffold protein Nherf1 as a hair-bundle component of the differentiating outer hair cells (OHCs). Nherf1−/− mice displayed OHC hair-bundle shape anomalies in the mid and basal cochlea, normally tuned to mid- and high-frequency tones, and mild (22–35 dB) hearing-Threshold elevations restricted to midhigh sound frequencies. This mild decrease in hearing sensitivity was, however, discordant with almost nonresponding OHCs at the cochlear base as assessed by distortion-product otoacoustic emissions and cochlear microphonic potentials. Moreover, unlike wild-type mice, responses of Nherf1−/− mice to high-frequency (20–40 kHz) test tones were not masked by tones of neighboring frequencies. Instead, efficient maskers were characterized by their frequencies up to two octaves below the probe-tone frequency, unusually low intensities up to 25 dB below probe-tone level, and growth-of-masker slope (2.2 dB/dB) reflecting their compressive amplification. Together, these properties do not fit the current acknowledged features of a hypersensitivity of the basal cochlea to lower frequencies, but rather suggest a previously unidentified mechanism. Low-frequency maskers, we propose, may interact within the unaffected cochlear apical region with midhigh frequency sounds propagated there via a mode possibly using the persistent contact of misshaped OHC hair bundles with the tectorial membrane. Our findings thus reveal a source of misleading interpretations of hearing Thresholds and of hypervulnerability to low-frequency sound interference.