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auditory brainstem response

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https://www.readbyqxmd.com/read/28916193/ferulic-acid-promotes-survival-and-differentiation-of-neural-stem-cells-to-prevent-gentamicin-induced-neuronal-hearing-loss
#1
Lintao Gu, Xinhua Cui, Wei Wei, Jia Yang, Xuezhong Li
Neural stem cells (NSCs) have exhibited promising potential in therapies against neuronal hearing loss. Ferulic acid (FA) has been widely reported to enhance neurogenic differentiation of different stem cells. We investigated the role of FA in promoting NSC transplant therapy to prevent gentamicin-induced neuronal hearing loss. NSCs were isolated from mouse cochlear tissues to establish in vitro culture, which were then treated with FA. The survival and differentiation of NSCs were evaluated. Subsequently, neurite outgrowth and excitability of the in vitro neuronal network were assessed...
September 12, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28891823/longitudinal-changes-in-electrically-evoked-auditory-event-related-potentials-in-children-with-auditory-brainstem-implants-preliminary-results-recorded-over-3-years
#2
Shuman He, Holly F B Teagle, Tyler C McFayden, Matthew Ewend, Lillian Henderson, Nancy He, Craig A Buchman
OBJECTIVES: This preliminary study aimed (1) to assess longitudinal changes in electrically evoked auditory event-related potentials (eERPs) in children with auditory brainstem implants (ABIs) and (2) to explore whether these changes could be accounted for by maturation in the central auditory system of these patients. DESIGN: Study participants included 5 children (S1 to S5) with an ABI in the affected ear. The stimulus was a train of electrical pulses delivered to individual ABI electrodes via a research interface...
September 7, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28890775/musical-training-enhances-neural-processing-of-comodulation-masking-release-in-the-auditory-brainstem
#3
Soheila Rostami, Abdollah Moossavi
Musical training strengthens segregation the target signal from background noise. Musicians have enhanced stream segregation, which can be considered a process similar to comodulation masking release. In the current study, we surveyed psychoacoustical comodulation masking release in musicians and non-musicians. We then recorded the brainstem responses to complex stimuli in comodulated and unmodulated maskers to investigate the effect of musical training on the neural representation of comodulation masking release for the first time...
July 18, 2017: Audiology Research
https://www.readbyqxmd.com/read/28890684/neural-correlates-of-early-sound-encoding-and-their-relationship-to-speech-in-noise-perception
#4
Emily B J Coffey, Alexander M P Chepesiuk, Sibylle C Herholz, Sylvain Baillet, Robert J Zatorre
Speech-in-noise (SIN) perception is a complex cognitive skill that affects social, vocational, and educational activities. Poor SIN ability particularly affects young and elderly populations, yet varies considerably even among healthy young adults with normal hearing. Although SIN skills are known to be influenced by top-down processes that can selectively enhance lower-level sound representations, the complementary role of feed-forward mechanisms and their relationship to musical training is poorly understood...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28890038/improving-the-efficiency-of-auditory-brainstem-responses-in-newborns-using-a-60clicks-s-stimulation-rate
#5
Lourdes Cubero-Rego, Josefina Ricardo-Garcell, María Corsi-Cabrera, Rogelio Cruz-Martínez, Carlos Rebolledo-Fernández, Gloria Otero-Ojeda, Thalía Harmony
Recent evidence suggests that Auditory Brainstem Responses (ABR), in neonates with risk factors for neurological damage, may show auditory brainstem abnormalities, even in patients with normal hearing. To compare the recording and diagnostic accuracy of neonatal Auditory Brainstem Responses (ABR), using 10 and 60clicks/s stimulation rates, two groups of neonates were prospectively studied: 30 healthy full-term neonates, with no peri- or postnatal complications; and 30 high-risk newborns with two or more of the following conditions: hyperbilirubinemia, use of ototoxic drugs, birth weight inferior to 1500g, perinatal sepsis, intraventricular hemorrhage, and/or mechanical ventilation...
September 7, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28874607/no-sensitive-guanylate-cyclase-isoforms-no-gc1-and-no-gc2-contribute-to-noise-induced-inner-hair-cell-synaptopathy
#6
Dorit Möhrle, Katrin Reimann, Steffen Wolter, Markus Wolters, Ksenya Varakina, Evanthia Mergia, Nicole Eichert, Hyun-Soon Geisler, Peter Sandner, Peter Ruth, Andreas Friebe, Robert Feil, Ulrike Zimmermann, Doris Koesling, Marlies Knipper, Lukas Rüttiger
Nitric oxide (NO) activates the NO-sensitive soluble guanylate cyclase (NO-GC, sGC) and triggers intracellular signaling pathways involving cGMP. For survival of cochlear hair cells and preservation of hearing, NO-mediated cascades have both protective and detrimental potential. Here we examine the cochlear function of mice lacking one of the two NO-sensitive guanylate cyclase isoforms [NO-GC1 knockout (KO) or NO-GC2 KO]. The deletion of NO-GC1 or NO-GC2 did not influence electromechanical outer hair cell (OHC) properties, as measured by distortion product otoacoustic emissions, neither before nor after noise exposure, nor were click- or noise-burst-evoked auditory brainstem response thresholds different from controls...
October 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28863595/bottlenose-dolphin-tursiops-truncatus-auditory-brainstem-responses-recorded-using-conventional-and-randomized-stimulation-and-averaging
#7
James J Finneran
Auditory brainstem response (ABR) measurements using conventional averaging (i.e., constant interstimulus interval, ISI) are limited to stimulus rates low enough to prevent overlapping of the ABRs to successive stimuli. To overcome this limitation, stimuli may be presented at high rates using pseudorandom sequences (e.g., maximum length sequences) or quasi-periodic sequences; however, these methods restrict the available stimulus sequences and require deconvolution to recover the ABR from the overlapping responses...
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
#8
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/28837630/influence-of-electrode-array-stiffness-and-diameter-on-hearing-in-cochlear-implanted-guinea-pig
#9
Mylène Drouillard, Renato Torres, Elisabeth Mamelle, Daniele De Seta, Olivier Sterkers, Evelyne Ferrary, Yann Nguyen
During cochlear implantation, electrode array translocation and trauma should be avoided to preserve residual hearing. The aim of our study was to evaluate the effect of physical parameters of the array on residual hearing and cochlear structures during insertion. Three array prototypes with different stiffnesses or external diameters were implanted in normal hearing guinea pigs via a motorized insertion tool carried on a robot-based arm, and insertion forces were recorded. Array prototypes 0.4 and 0.4R had 0...
2017: PloS One
https://www.readbyqxmd.com/read/28837548/cdc-grand-rounds-newborn-screening-for-hearing-loss-and-critical-congenital-heart-disease
#10
Scott D Grosse, Tiffany Riehle-Colarusso, Marcus Gaffney, Craig A Mason, Stuart K Shapira, Marci K Sontag, Kim Van Naarden Braun, John Iskander
Newborn screening is a public health program that benefits 4 million U.S. infants every year by enabling early detection of serious conditions, thus affording the opportunity for timely intervention to optimize outcomes (1). States and other U.S. jurisdictions decide whether and how to regulate newborn screening practices. Most newborn screening is done through laboratory analyses of dried bloodspot specimens collected from newborns. Point-of-care newborn screening is typically performed before discharge from the birthing facility...
August 25, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28832600/hpn-07-a-free-radical-spin-trapping-agent-protects-against-functional-cellular-and-electrophysiological-changes-in-the-cochlea-induced-by-acute-acoustic-trauma
#11
Donald Ewert, Ning Hu, Xiaoping Du, Wei Li, Matthew B West, Chul-Hee Choi, Robert Floyd, Richard D Kopke
Oxidative stress is considered a major cause of the structural and functional changes associated with auditory pathologies induced by exposure to acute acoustic trauma AAT). In the present study, we examined the otoprotective effects of 2,4-disulfophenyl-N-tert-butylnitrone (HPN-07), a nitrone-based free radical trap, on the physiological and cellular changes in the auditory system of chinchilla following a six-hour exposure to 4 kHz octave band noise at 105 dB SPL. HPN-07 has been shown to suppress oxidative stress in biological models of a variety of disorders...
2017: PloS One
https://www.readbyqxmd.com/read/28817812/the-mir-34a-bcl-2-pathway-contributes-to-auditory-cortex-neuron-apoptosis-in-age-related-hearing-loss
#12
Qiuhong Huang, Yongkang Ou, Hao Xiong, Haidi Yang, Zhigang Zhang, Suijun Chen, Yongyi Ye, Yiqing Zheng
HYPOTHESIS: The miR-34a/Bcl-2 signaling pathway may play a role in the mechanisms related to age-related hearing loss (AHL) in the auditory cortex. BACKGROUND: The auditory cortex plays a key role in the recognition and processing of complex sound. It is difficult to explain why patients with AHL have poor speech recognition, so increasing numbers of studies have focused on its central change. Although micro (mi)RNAs in the central nervous system have recently been increasingly reported to be associated with age-related diseases, the molecular mechanisms of AHL in the auditory cortex are not fully understood...
August 18, 2017: Audiology & Neuro-otology
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
#13
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/28808196/antioxidant-mediated-response-of-scoparia-dulcis-in-noise-induced-redox-imbalance-and-immunohistochemical-changes-in-rat-brain
#14
Wankupar Wankhar, Sakthivel Srinivasan, Ravindran Rajan, Rathinasamy Sheeladevi
Noise has been regarded as an environmental/occupational stressor that causes damages to both auditory and non-auditory organs. Prolonged exposure to these mediators of stress has often resulted in detrimental effect, where oxidative/nitrosative stress plays a major role. Hence, it would be appropriate to examine the possible role of free radicals in brain discrete regions and the "antioxidants" mediated response of S. dulcis. Animals were subjected to noise stress for 15 days (100 dB/4 hours/day) and estimation of endogenous free radical and antioxidant activity were carried out on brain discrete regions (the cerebral cortex, cerebellum, brainstem, striatum, hippocampus and hypothalamus)...
January 19, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28806500/doxepin-mitigates-noise-induced-neuronal-damage-in-primary-auditory-cortex-of-mice-via-suppression-of-acid-sphingomyelinase-ceramide-pathway
#15
Yu-Ting Su, Xing-Xing Meng, Xi Zhang, Yi-Bin Guo, Hai-Jun Zhang, Yao-Ping Cheng, Xiao-Ping Xie, Yao-Ming Chang, Jun-Xiang Bao
Neuronal damage in primary auditory cortex (A1) underlies complex manifestations of noise exposure, prevention of which is critical for health maintenance. Acid sphingomyelinase (ASM) catalyzes generation of ceramide (Cer) which if over-activated mediates neuronal disorders in various diseases. Tricyclic antidepressants (TCAs), by restraining ASM/Cer, benefits multiple neuronal anomalies, so we aimed to elucidate the effect of TCA on noise induced hearing loss and auditory cortex derangement, unraveling mechanism involved...
August 14, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28803577/auditory-brainstem-response-abr-profiling-tests-as-diagnostic-support-for-schizophrenia-and-adult-attention-deficit-hyperactivity-disorder-adhd
#16
Eva Juselius Baghdassarian, Maria Nilsson Markhed, Eva Lindström, Björn M Nilsson, Tommy Lewander
OBJECTIVE: To evaluate the performances of two auditory brainstem response (ABR) profiling tests as potential biomarkers and diagnostic support for schizophrenia and adult attention-deficit hyperactivity disorder (ADHD), respectively, in an investigator-initiated blinded study design. METHOD: Male and female patients with schizophrenia (n=26) and adult ADHD (n=24) meeting Diagnostic and Statistical Manual of Mental Disorders Fourth Edition (DSM IV) diagnostic criteria and healthy controls (n=58) comprised the analysis set (n=108) of the total number of study participants (n=119)...
August 14, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/28802382/evaluation-of-the-possible-protective-role-of-naringenin-on-gentamicin-induced-ototoxicity-a-preliminary-study
#17
I Koçak, S Sarac, E Aydogan, E Şentürk, D Akakın, K Koroglu, Ö F Özer
OBJECTIVES: The purpose of this study is to evaluate the possible protective role of naringenin in gentamicin-induced ototoxicity through an audiological, biochemical and histopathological evaluation. METHODS: This study was conducted on 32 adult male rats that were randomized into 4 groups(control, gentamicin, naringenin + gentamicin, and naringenin). Naringenin was given to the rats via oral gavage in a dose of 50 mg/kg/day during the 14 day study period. Gentamicin was given by the intraperitoneal route in a dose of 120 mg/kg/day...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28802357/evaluation-of-ototoxicity-of-intratympanic-administration-of-methotrexate-in-rats
#18
Sabri Baki Eren, Remzi Dogan, Alper Yenigun, Bayram Veyseller, Selahattin Tugrul, Orhan Ozturan, Mehmet Serif Aydin
OBJECTIVE: Methotrexate is a dihydrofolate reductase enzyme inhibitor with very high selectivity, and it is an antiproliferative folic acid antagonist used for the treatment of autoimmune diseases. In this study, our objective was to evaluate the effect of intratympanic Methotrexate application in the inner ear. METHODS: This study was planned as an animal study. This study performed in a tertiary referral center. 24 healthy female rats were used in our study. They were separated into three groups...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28796092/oral-administration-of-clinical-stage-drug-candidate-sens-401-effectively-reduces-cisplatin-induced-hearing-loss-in-rats
#19
Mathieu Petremann, Christophe Tran Van Ba, Audrey Broussy, Charlotte Romanet, Jonas Dyhrfjeld-Johnsen
HYPOTHESIS: SENS-401, an oral clinical-stage drug, may reduce cisplatin-induced hearing loss and cochlear damage in an in vivo model. BACKGROUND: Cisplatin is commonly associated with hearing loss, causing significant learning and behavioral difficulties in the pediatric cancer population, and for which there are currently no clinical solutions. SENS-401 has previously been shown to improve acoustic trauma-induced hearing loss in vivo. METHODS: The effect of SENS-401 (R-azasetron besylate) on cisplatin IC50 values was evaluated in a panel of cisplatin-sensitive cell lines (NIH:OVCAR-3, SK-N-AS, NCI-H460, FaDu)...
October 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28791082/protective-effect-of-nigella-sativa-oil-on-acoustic-trauma-induced-hearing-loss-in-rats
#20
Belde Culhaoglu, Selim S Erbek, Seyra Erbek, Evren Hizal
Acoustic trauma is a common reason for hearing loss. Different agents are used to prevent the harmful effect of acoustic trauma on hearing. The aim of this study was to evaluate the potential preventive effect of Nigella sativa (black cumin) oil in acoustic trauma. Our experimental study was conducted with 20 Sprague Downey female rats (mean age, 12 months; mean weight 250 g). All of the procedures were held under general anesthesia. Following otoscopic examinations, baseline-hearing thresholds were obtained using auditory brainstem responses (ABR)...
July 18, 2017: Audiology Research
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