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https://www.readbyqxmd.com/read/28924582/data-on-the-effect-of-conductive-hearing-loss-on-auditory-and-visual-cortex-activity-revealed-by-intrinsic-signal-imaging
#1
Manuel Teichert, Jürgen Bolz
This data article provides additional data related to the research article entitled "Simultaneous intrinsic signal imaging of auditory and visual cortex reveals profound effects of acute hearing loss on visual processing" (Teichert and Bolz, 2017) [1]. The primary auditory and visual cortex (A1 and V1) of adult male C57BL/6J mice (P120-P240) were mapped simultaneously using intrinsic signal imaging (Kalatsky and Stryker, 2003) [2]. A1 and V1 activity evoked by combined auditory and visual stimulation were measured before and after conductive hearing loss (CHL) induced by bilateral malleus removal...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28888754/effect-of-antioxidant-supplementation-on-the-auditory-threshold-in-sensorineural-hearing-loss-a-meta-analysis
#2
Maria Eduarda Di Cavalcanti Alves de Souza, Klinger Vagner Teixeira da Costa, Paulo Augusto Vitorino, Nassib Bezerra Bueno, Pedro de Lemos Menezes
INTRODUCTION: Hearing loss is conceptualized as any impairment of the ability to hear and/or detect speech or environment sounds, regardless of cause, type, or degree. It may occur at different stages of life; during pregnancy or childbirth, in childhood, adulthood or old age. It should be noted that aging is the most common cause of sensorineural hearing loss followed by noise-induced hearing loss, and both are closely related to the formation of reactive oxygen species. Dietary antioxidant supplementation has been employed as a therapeutic strategy to prevent and/or delay the risks of major human diseases...
August 26, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28874258/acoustic-dose-behavioral-response-relationship-in-sea-bass-dicentrarchus-labrax-exposed-to-playbacks-of-pile-driving-sounds
#3
Ronald A Kastelein, Nancy Jennings, Aimée Kommeren, Lean Helder-Hoek, Jessica Schop
The foundations of offshore wind turbines are attached to the sea bed by percussion pile driving. Pile driving sounds may affect the behavior of fish. Acoustic dose-behavioral response relationships were determined for sea bass in a pool exposed for 20 min to pile driving sounds at seven mean received root-mean-square sound pressure levels [SPLrms; range: 130-166 dB re 1 μPa; single strike sound exposure level (SELss) range: 122-158; 6 dB steps]. Initial responses (sudden, short-lived changes in swimming speed and direction) and sustained responses (changes in school cohesion, swimming depth, and speed) were quantified...
August 31, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28869628/the-influence-of-the-acoustic-stimulus-on-postural-stability
#4
Anna Majewska, Weronika Kawałkiewicz, Dorota Hojan-Jezierska, Agata Jezierska, Leszek Kubisz
PURPOSE: The purpose of this study was to assess if 65 dB and 4000 Hz stimuli affect postural stability of young normally hearing people. METHODS: Posturography examinations belong to clinical tests which evaluate the motor skills. Posturography can be divided into static posturography and dynamic posturography. In both static and dynamic posturography patient stays on the platform with opened and closed eyes, but in the case of dynamic one, platform is unstable...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28865401/spatial-and-temporal-determinants-of-a-weighted-and-frequency-specific-sound-levels-an-elastic-net-approach
#5
Erica D Walker, Jaime E Hart, Petros Koutrakis, Jennifer M Cavallari, Trang VoPham, Marcos Luna, Francine Laden
BACKGROUND: Urban sound levels are a ubiquitous environmental stressor and have been shown to be associated with a wide variety of health outcomes. While much is known about the predictors of A-weighted sound pressure levels in the urban environment, far less is known about other frequencies. OBJECTIVE: To develop a series of spatial-temporal sound models to predict A-weighted sound pressure levels, low, mid, and high frequency sound for Boston, Massachusetts. METHODS: Short-term sound levels were gathered at n = 400 sites from February 2015 - February 2016...
August 30, 2017: Environmental Research
https://www.readbyqxmd.com/read/28863620/a-one-school-year-longitudinal-study-of-secondary-school-teachers-voice-parameters-and-the-influence-of-classroom-acoustics
#6
Giulia Calosso, Giuseppina Emma Puglisi, Arianna Astolfi, Antonella Castellana, Alessio Carullo, Franco Pellerey
Recent literature reports that a large percentage of teachers complain that teaching has an adverse effect on their voice status. Thus, more needs to be done to study their vocal behavior. The objective of this longitudinal study was twofold: to determine changes in the voice use of teachers over a school year, and to study the relationships between voice use and classroom acoustic parameters. Thirty-one teachers from two secondary schools in Turin (Italy) were involved at the beginning of the 2014-2015 school year, and 22 of them also participated at the end of the same school year...
August 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28863591/bottlenose-dolphin-tursiops-truncatus-auditory-brainstem-responses-to-frequency-modulated-chirp-stimuli
#7
James J Finneran, Jason Mulsow, Ryan Jones, Dorian S Houser, Robert F Burkard
Previous studies have demonstrated that increasing-frequency chirp stimuli (up-chirps) can enhance human auditory brainstem response (ABR) amplitudes by compensating for temporal dispersion occurring along the cochlear partition. In this study, ABRs were measured in two bottlenose dolphins (Tursiops truncatus) in response to spectrally white clicks, up-chirps, and decreasing-frequency chirps (down-chirps). Chirp durations varied from 125 to 2000 μs. For all stimuli, frequency bandwidth was constant (10-180 kHz) and peak-equivalent sound pressure levels (peSPLs) were 115, 125, and 135 dB re 1 μPa...
August 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28859618/evaluation-of-noise-hazard-during-the-holmium-laser-enucleation-of-prostate
#8
Huan Xu, Yan-Bo Chen, Meng Gu, Qi Chen, Zhong Wang
BACKGROUND: To evaluate noise hazard during holmium laser enucleation of the prostate (HoLEP), we designed a study to detect such a risk in this procedure. METHODS: This study was conducted over a 12-month period on 223 patients with benign prostatic hyperplasia (BPH), 121 of whom underwent HoLEP while those remaining underwent transurethral resection of the prostate (TURP). A sound level meter was used to detect the exposure of surgeons to noise. The recordings used were in accordance with the standards set by the Occupational Safety and Health Administration (OSHA) and the United States E nvironmental Protection A gency ...
August 31, 2017: BMC Urology
https://www.readbyqxmd.com/read/28857773/automatic-assessment-of-blood-pressure-for-korotkoff-sounds-on-the-basis-of-human-hearing-threshold
#9
Sung Jun Hong, Jong Shill Lee, Jae Hoon Oh, Young Joon Chee, Dong Pyo Jang, In Young Kim
OBJECTIVE: In this study, to measure blood pressure (BP) on the basis of human hearing threshold, we proposed a method that detects the audible or inaudible Korotkoff sounds (K-sounds) using the equal loudness contour and automatically assesses the BP. METHODS: In this study, we detected the systolic period of K-sounds using cuff pressure oscillation and then converted the K-sounds corresponding to the systolic interval into sound pressure levels (SPLs). Next, the systolic blood pressure (SBP) and diastolic blood pressure (DBP) were assessed by mapping the K-sounds, which were converted into SPLs on an equal loudness contour...
August 29, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28837726/respiratory-and-laryngeal-changes-with-vocal-loading-in-younger-and-older-individuals
#10
Anusha Sundarrajan, Jessica E Huber, M Preeti Sivasankar
Purpose: The objective of the current study was to investigate the effects of age and vocal loading on the respiratory and laryngeal systems. Method: Fourteen younger (M = 20 years) and 13 older (M = 75 years) healthy individuals participated in a 40-min vocal loading challenge in the presence of 70-dB background noise. Respiratory kinematic and laryngeal measurements were obtained before and after the challenge. Results: Following the loading challenge, participants in both groups reported greater speaking effort...
September 18, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28837719/modeling-the-pathophysiology-of-phonotraumatic-vocal-hyperfunction-with-a-triangular-glottal-model-of-the-vocal-folds
#11
Gabriel E Galindo, Sean D Peterson, Byron D Erath, Christian Castro, Robert E Hillman, Matías Zañartu
Purpose: Our goal was to test prevailing assumptions about the underlying biomechanical and aeroacoustic mechanisms associated with phonotraumatic lesions of the vocal folds using a numerical lumped-element model of voice production. Method: A numerical model with a triangular glottis, posterior glottal opening, and arytenoid posturing is proposed. Normal voice is altered by introducing various prephonatory configurations. Potential compensatory mechanisms (increased subglottal pressure, muscle activation, and supraglottal constriction) are adjusted to restore an acoustic target output through a control loop that mimics a simplified version of auditory feedback...
September 18, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28828360/transpulmonary-pressure-importance-and-limits
#12
REVIEW
Domenico Luca Grieco, Lu Chen, Laurent Brochard
Transpulmonary pressure (PL) is computed as the difference between airway pressure and pleural pressure and separates the pressure delivered to the lung from the one acting on chest wall and abdomen. Pleural pressure is measured as esophageal pressure (PES) through dedicated catheters provided with esophageal balloons. We discuss the role of PL in assessing the effects of mechanical ventilation in patients with acute respiratory distress syndrome (ARDS). In the supine position, directly measured PL represents the pressure acting on the alveoli and airways...
July 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28826980/the-effect-of-vocal-fold-inferior-surface-hypertrophy-on-voice-function-in-excised-canine-larynges
#13
Ruiqing Wang, Huijing Bao, Xinlin Xu, David Piotrowski, Yu Zhang, Peiyun Zhuang
OBJECTIVE: This study aimed to explore the changes in vocal fold inferior surface hypertrophy (VFISH) on vocal fold vibration by aerodynamic and acoustic analysis. The present study allows us to gain new insights into the subglottal convergence angle (SCA), which will change with VFISH. STUDY DESIGN: The study is prospective, and designed for repeated measures with each excised canine larynx serving as own control. SUBJECTS AND METHODS: Three degrees of VFISH, initial, mild, and severe, were simulated by injecting different doses of fructose injections into the inferior surface of the vocal folds of 10 excised canine larynges...
August 18, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28826625/preventive-effect-of-curcumin-and-its-highly-bioavailable-preparation-on-hearing-loss-induced-by-single-or-repeated-exposure-to-noise-a%C3%A2-comparative-and-mechanistic-study
#14
Taro Yamaguchi, Masanori Yoneyama, Yusuke Onaka, Atsushi Imaizumi, Kiyokazu Ogita
We sought to determine the preventive effects of curcumin and its highly bioavailable preparation on noise-induced hearing loss in a novel murine model of permanent hearing loss developed by repeated exposure to noise. Upon exposure to noise (8-kHz octave band noise, 90 dB sound pressure level, 1 h), hearing ability was impaired in a temporary and reversible manner. During repeated noise exposure (1-h exposure per day, 5 days), there was a progressive increase in the auditory threshold shift at 12 and 20 kHz...
August 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/28816207/evaluation-of-the-effects-of-various-sound-pressure-levels-on-the-level-of-serum-aldosterone-concentration-in-rats
#15
Parvin Nassiri, Sajad Zare, Mohammad R Monazzam, Akram Pourbakht, Kamal Azam, Taghi Golmohammadi
INTRODUCTION: Noise exposure may have anatomical, nonauditory, and auditory influences. Considering nonauditory impacts, noise exposure can cause alterations in the automatic nervous system, including increased pulse rates, heightened blood pressure, and abnormal secretion of hormones. The present study aimed at examining the effect of various sound pressure levels (SPLs) on the serum aldosterone level among rats. MATERIALS AND METHODS: A total of 45 adult male rats with an age range of 3 to 4 months and a weight of 200 ± 50 g were randomly divided into 15 groups of three...
July 2017: Noise & Health
https://www.readbyqxmd.com/read/28813464/representation-of-three-dimensional-space-in-the-auditory-cortex-of-the-echolocating-bat-p-discolor
#16
Wolfgang Greiter, Uwe Firzlaff
The auditory cortex is an essential center for sound localization. In echolocating bats, combination sensitive neurons tuned to specific delays between call emission and echo perception represent target distance. In many bats, these neurons are organized as a chronotopically organized map of echo delay. However, it is still unclear to what extend these neurons can process directional information and thereby form a three-dimensional representation of space. We investigated the representation of three-dimensional space in the auditory cortex of Phyllostomus discolor...
2017: PloS One
https://www.readbyqxmd.com/read/28813329/ego-depletion-in-sports-highlighting-the-importance-of-self-control-strength-for-high-level-sport-performance
#17
REVIEW
Chris Englert
Athletes are constantly confronted with self-control demands, but previous research has delivered sound empirical evidence that athletes are not always capable of dealing with these demands. According to the strength model of self-control, individuals have a limited amount of self-control strength, which can become temporarily depleted following self-control demands (e.g., attention regulation). When self-control strength is depleted, that is, in a state of ego depletion, athletes are less persistent during strenuous physical exercise, are less likely to follow their exercise regimens, and tend to perform worse under pressure...
August 2017: Current Opinion in Psychology
https://www.readbyqxmd.com/read/28813235/temporary-hearing-threshold-shift-in-healthy-volunteers-with-hearing-protection-caused-by-acoustic-noise-exposure-during-3-t-multisequence-mr-neuroimaging
#18
Chao Jin, Huan Li, Xianjun Li, Miaomiao Wang, Congcong Liu, Jianxin Guo, Jian Yang
Purpose To determine whether a single 51-minute exposure to acoustic noise during 3-T multisequence magnetic resonance (MR) neuroimaging could affect the hearing threshold of healthy adults with earplugs and sponge mats as hearing protection. Materials and Methods With earplugs and motion-refraining sponge mats as hearing protection, 26 healthy young adults underwent 3-T MR neuroimaging imaging that included T1-weighted three-dimensional gradient-echo sequence, T2-weighted fast spin-echo sequence, diffusion-tensor imaging, diffusion-kurtosis imaging, T2*-weighted three-dimensional multiecho gradient-echo sequence, and blood oxygen level-dependent imaging...
August 16, 2017: Radiology
https://www.readbyqxmd.com/read/28808778/audiogram-of-the-mallard-duck-anas-platyrhynchos-from-16%C3%A2-hz-to-9%C3%A2-khz
#19
Evan M Hill
The pure-tone thresholds of three mallard ducks were determined from 16 Hz to 9 kHz. The purpose was to determine whether the mallard duck hears infrasound, which then may potentially be used for navigation, similar to how it is proposed that pigeons use it for homing. At a level of 60 dB sound pressure level (re 20 μN/m(2)), their hearing range extends 6.85 octaves from 66 Hz to 7.6 kHz, with a best sensitivity of 12.5 dB at 2 kHz. However, at no frequency, including the lowest tested, were the ducks' thresholds lower than those of humans...
August 14, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28799045/trauma-laparoscopy-when-to-start-and-when-to-convert
#20
Oleh Matsevych, Modise Koto, Moses Balabyeki, Colleen Aldous
BACKGROUND: The use of laparoscopy for stable patients with abdominal trauma is increasing and its accuracy is nearly 100%. However, indications for laparoscopy and for conversion differ among centers. The aim of this study was to investigate indications for trauma laparoscopy and for conversion to laparotomy. METHODS: All trauma patients managed with laparoscopy over a 4-year period were retrospectively analyzed. Indications for laparoscopy, morbidity, and reasons for conversion were investigated and predictors of morbidity and conversion were sought...
August 10, 2017: Surgical Endoscopy
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