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Sensorineural hearing loss

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https://www.readbyqxmd.com/read/28724398/whole-genome-sequencing-identifies-a-novel-alms1-gene-mutation-in-two-chinese-siblings-with-alstr%C3%A3-m-syndrome
#1
Lin Yang, Zixiu Li, Mei Mei, Xiaomei Fan, Guodong Zhan, Huijun Wang, Guoying Huang, Mingbang Wang, Weidong Tian, Wenhao Zhou
BACKGROUND: Alström syndrome is a rare multi-systemic disorder with a broad spectrum of symptoms. This syndrome is characterized by childhood retinal degeneration; sensorineural hearing loss; obesity; type 2 diabetes mellitus; cardiomyopathy; systemic fibrosis; and pulmonary, hepatic, and renal failure. CASE PRESENTATION: A Chinese quartet family with two siblings predominantly affected by cone-rod dystrophy and short stature were recruited. The craniofacial dysmorphism and on-set age-of-cone-rod dystrophy in the proband showed a minor intrafamilial variability...
July 19, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28723597/short-term-results-of-intra-tympanic-gentamicin-and-dexamethasone-on-hearing-and-tinnitus-in-meniere-s-disease-a-case-control-study
#2
Irfan Ul Shamas
INTRODUCTION: The role of this study was to evaluate the effectiveness of intra tympanic administration of Gentamicin(40 mgs/ml) and Dexamethasone 0.5 ml(4 mgs/ml) on hearing and tinnitus of patients who had recurrent acute attacks of vertigo, tinnitus and hearing loss. STUDY DESIGN: 60 consecutive patients of Meniere's disease were randomly divided into 3 groups of twenty patients each. Group A included 20 patients who received intra tympanic gentamicin, Group B included 20 patients who received intra tympanic dexamethasone and Group C included 20 patients who received intra tympanic normal saline 0...
June 1, 2017: International Tinnitus Journal
https://www.readbyqxmd.com/read/28723594/cochlear-implantation-improves-hearing-and-vertigo-in-patients-after-removal-of-vestibular-schwannoma
#3
Ariane Roemer, Thomas Lenarz, Anke Lesinski-Schiedat
OBJECTIVES: With rising quality of speech perception in cochlear implant users, the indication widens. Nowadays, cochlear implantation is reasonable even in vestibular schwannoma patients. Speech perception with a cochlear implant is in these patients as promising as in patients with sensorineural hearing loss. However, the impact of cochlear implantation on vertigo and tinnitus after removal of vestibular schwannoma has not been investigated yet. METHODS: In a retrospective study, we analysed 12 patients treated with a cochlear implant after removal of vestibular schwannoma...
June 1, 2017: International Tinnitus Journal
https://www.readbyqxmd.com/read/28717876/structural-and-ultrastructural-changes-to-type-i-spiral-ganglion-neurons-and-schwann-cells-in-the-deafened-guinea-pig-cochlea
#4
Andrew K Wise, Remy Pujol, Thomas G Landry, James B Fallon, Robert K Shepherd
Sensorineural hearing loss is commonly caused by damage to cochlear sensory hair cells. Coinciding with hair cell degeneration, the peripheral fibres of type I spiral ganglion neurons (SGNs) that normally form synaptic connections with the inner hair cell gradually degenerate. We examined the time course of these degenerative changes in type I SGNs and their satellite Schwann cells at the ultrastructural level in guinea pigs at 2, 6, and 12 weeks following aminoglycoside-induced hearing loss. Degeneration of the peripheral fibres occurred prior to the degeneration of the type I SGN soma and was characterised by shrinkage of the fibre followed by retraction of the axoplasm, often leaving a normal myelin lumen devoid of axoplasmic content...
July 17, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28717060/clinical-data-analysis-of-genotypes-and-phenotypes-of-deafness-gene-mutations-in-newborns-a-retrospective-study
#5
Yating Du, Lihui Huang, Xueyao Wang, Qingjia Cui, Xiaohua Cheng, Liping Zhao, Tingting Ni
We retrospectively analyzed newborns with deafness gene mutations and summarized the relationship between genotype and phenotype to provide a basis for genetic counseling. We studied 582 subjects positive for deafness gene mutations that were treated in the otology outpatient department of Beijing Tongren Hospital, Capital Medical University, between April 2012 and April 2016. The subjects were divided into 3 categories: a diagnosed group (group A), which was further subdivided into subgroups A1 (homozygous and compound heterozygous GJB2 mutations) and A2 (homozygous and compound heterozygous SLC26A4 mutations); a drug-induced deafness group (group B, mitochondrial (Mt) gene mutations); and a mutation carrier group (group C), which was further subdivided into the subgroups C1 (GJB2 heterozygous mutations), C2 (SLC26A4 heterozygous mutations), C3 (GJB3 heterozygous mutations), and C4 (double gene mutations)...
July 17, 2017: Bioscience Trends
https://www.readbyqxmd.com/read/28714100/why-is-it-so-hard-to-reach-agreement-on-terminology-the-case-of-developmental-language-disorder-dld
#6
Dorothy V M Bishop
A recent project entitled CATALISE used the Delphi method to reach a consensus on terminology for unexplained language problems in children. 'Developmental language disorder' (DLD) was the term agreed by a panel of 57 experts. Here I reflect on points of difficulty that arose when attempting to reach a consensus, using qualitative information from comments made by panel members to illustrate the kinds of argument used. One issue of debate was the use of labels, in particular the term 'disorder', which was seen as having both pros and cons...
July 17, 2017: International Journal of Language & Communication Disorders
https://www.readbyqxmd.com/read/28713423/discovering-the-unexpected-with-the-utilization-of-ngs-in-diagnostics-of-non-syndromic-hearing-loss-disorders-the-family-case-of-ildr1-dependent-hearing-loss-disorder
#7
Jernej Kovač, Gašper Klančar, Katarina Trebušak Podkrajšek, Saba Battelino
Sensorineural hearing loss (SNHL) is a heterogeneous family of hearing disabilities with congenital (including genetic) as well as acquired etiology. Congenital SNHL of genetic etiology is further sub-divided into autosomal dominant, autosomal recessive and X-linked SNHL. More than 60 genes are involved in the etiology of autosomal recessive non-syndromic hearing loss (ARNSHL) commonly manifesting as heterogeneous pre-lingual profound to severe non-progressive clinical phenotype. ILDR1-dependent ARNSHL (DFNB42, OMIM: # 609646) is a very rare sub-type of hearing disability, with unknown prevalence, caused by function-damaging genetic variants in ILDR1 gene reported in families of Middle-Eastern origin...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28712672/noise-induced-cochlear-synaptopathy-in-rhesus-monkeys-macaca-mulatta
#8
M D Valero, J A Burton, S N Hauser, T A Hackett, R Ramachandran, M C Liberman
Cochlear synaptopathy can result from various insults, including acoustic trauma, aging, ototoxicity, or chronic conductive hearing loss. For example, moderate noise exposure in mice can destroy up to ∼50% of synapses between auditory nerve fibers (ANFs) and inner hair cells (IHCs) without affecting outer hair cells (OHCs) or thresholds, because the synaptopathy occurs first in high-threshold ANFs. However, the fiber loss likely impairs temporal processing and hearing-in-noise, a classic complaint of those with sensorineural hearing loss...
July 8, 2017: Hearing Research
https://www.readbyqxmd.com/read/28708814/chirp-evoked-otoacoustic-emissions-and-middle-ear-absorbance-for-monitoring-ototoxicity-in-cystic-fibrosis-patients
#9
Angela C Garinis, Douglas H Keefe, Lisa L Hunter, Denis F Fitzpatrick, Daniel B Putterman, Garnett P McMillan, Jeffrey A Gold, M Patrick Feeney
OBJECTIVES: The goal of this study was to investigate the use of transient-evoked otoacoustic emissions (TEOAEs) and middle ear absorbance measurements to monitor auditory function in patients with cystic fibrosis (CF) receiving ototoxic medications. TEOAEs were elicited with a chirp stimulus using an extended bandwidth (0.71 to 8 kHz) to measure cochlear function at higher frequencies than traditional TEOAEs. Absorbance over a wide bandwidth (0.25 to 8 kHz) provides information on middle ear function...
July 13, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28708796/significance-of-endolymphatic-hydrops-in-ears-with-unilateral-sensorineural-hearing-loss
#10
Yuriko Okazaki, Tadao Yoshida, Satofumi Sugimoto, Masaaki Teranishi, Ken Kato, Shinji Naganawa, Michihiko Sone
OBJECTIVE: The purpose of this study was to investigate the existence of endolymphatic hydrops (EH) in affected and unaffected ears in patients with unilateral sensorineural hearing loss (SNHL) using contrast-enhanced magnetic resonance imaging (MRI), and to evaluate the significance of EH in various otological diseases. STUDY DESIGN: Retrospective study. SETTING: University hospital. METHODS: One hundred eighty-two ears from 91 patients with unilateral SNHL were studied...
July 13, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28705044/the-genetics-of-hair-cell-function-in-zebrafish
#11
Teresa Nicolson
Our ears are remarkable sensory organs, providing the important senses of balance and hearing. The complex structure of the inner ear, or 'labyrinth', along with the assorted neuroepithelia, have evolved to detect head movements and sounds with impressive sensitivity. The rub is that the inner ear is highly vulnerable to genetic lesions and environmental insults. According to National Institute of Health estimates, hearing loss is one of the most commonly inherited or acquired sensorineural diseases. To understand the causes of deafness and balance disorders, it is imperative to understand the underlying biology of the inner ear, especially the inner workings of the sensory receptors...
July 13, 2017: Journal of Neurogenetics
https://www.readbyqxmd.com/read/28700447/impact-of-hearing-aid-technology-on-outcomes-in-daily-life-iii-localization
#12
Jani A Johnson, Jingjing Xu, Robyn M Cox
OBJECTIVE: Compared to basic-feature hearing aids, premium-feature hearing aids have more advanced technologies and sophisticated features. The objective of this study was to explore the difference between premium-feature and basic-feature hearing aids in horizontal sound localization in both laboratory and daily life environments. We hypothesized that premium-feature hearing aids would yield better localization performance than basic-feature hearing aids. DESIGN: Exemplars of premium-feature and basic-feature hearing aids from two major manufacturers were evaluated...
July 11, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28699203/in-reference-to-to-image-or-not-to-image-a-cost-effectiveness-analysis-of-mri-for-patients-with-asymmetric-sensorineural-hearing-loss
#13
Robert A Dobie
No abstract text is available yet for this article.
July 12, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28694336/magnified-neural-envelope-coding-predicts-deficits-in-speech-perception-in-noise
#14
Rebecca E Millman, Sven L Mattys, André D Gouws, Garreth Prendergast
Verbal communication in noisy backgrounds is challenging. Understanding speech in background noise that fluctuates in intensity over time is particularly difficult for hearing-impaired listeners with a sensorineural hearing loss (SNHL). The reduction in fast-acting cochlear compression associated with SNHL exaggerates the perceived fluctuations in intensity in amplitude-modulated sounds. SNHL-induced changes in the coding of amplitude-modulated sounds may have a detrimental effect on the ability of SNHL listeners to understand speech in the presence of modulated background noise...
July 10, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28690861/whole-exome-sequencing-analysis-of-waardenburg-syndrome-in-a-chinese-family
#15
Dezhong Chen, Na Zhao, Jing Wang, Zhuoyu Li, Changxin Wu, Jie Fu, Han Xiao
Waardenburg syndrome (WS) is a dominantly inherited, genetically heterogeneous auditory-pigmentary syndrome characterized by non-progressive sensorineural hearing loss and iris discoloration. By whole-exome sequencing (WES), we identified a nonsense mutation (c.598C>T) in PAX3 gene, predicted to be disease causing by in silico analysis. This is the first report of genetically diagnosed case of WS PAX3 c.598C>T nonsense mutation in Chinese ethnic origin by WES and in silico functional prediction methods...
2017: Human Genome Variation
https://www.readbyqxmd.com/read/28690836/noise-induced-and-age-related-hearing-loss-%C3%A2-new-perspectives-and-potential-therapies
#16
REVIEW
M Charles Liberman
The classic view of sensorineural hearing loss has been that the primary damage targets are hair cells and that auditory nerve loss is typically secondary to hair cell degeneration. Recent work has challenged that view. In noise-induced hearing loss, exposures causing only reversible threshold shifts (and no hair cell loss) nevertheless cause permanent loss of >50% of the synaptic connections between hair cells and the auditory nerve. Similarly, in age-related hearing loss, degeneration of cochlear synapses precedes both hair cell loss and threshold elevation...
2017: F1000Research
https://www.readbyqxmd.com/read/28690485/a-novel-pathogenic-variant-in-the-mitf-gene-segregating-with-a-unique-spectrum-of-ocular-findings-in-an-extended-iranian-waardenburg-syndrome-kindred
#17
Nazanin Jalilian, Mohammad A Tabatabaiefar, Tayyeb Bahrami, Golaleh Karbasi, Mohammad H Bahramian, Abdolrahman Salimpoor, Mohammad R Noori-Daloii
Waardenburg syndrome (WS) is a rare genetic disorder characterized by abnormal pigmentation of the hair, skin, and iris as well as sensorineural hearing loss. WS is subdivided into 4 major types (WS1-4), where WS2 is characterized by the absence of dystopia canthorum. This study was launched to investigate clinical and molecular characteristics of WS in an extended Iranian WS2 family. A comprehensive clinical investigation was performed. Peripheral blood samples were collected and genomic DNA was extracted...
June 2017: Molecular Syndromology
https://www.readbyqxmd.com/read/28688560/speech-evoked-auditory-brainstem-responses-in-children-with-hearing-loss
#18
Amineh Koravand, Rida Al Osman, Véronique Rivest, Catherine Poulin
OBJECTIVE: The main objective of the present study was to investigate subcortical auditory processing in children with sensorineural hearing loss. METHODS: Auditory Brainstem Responses (ABRs) were recorded using click and speech/da/stimuli. Twenty-five children, aged 6-14 years old, participated in the study: 13 with normal hearing acuity and 12 with sensorineural hearing loss. RESULTS: No significant differences were observed for the click-evoked ABRs between normal hearing and hearing-impaired groups...
August 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28688548/eeg-activity-as-an-objective-measure-of-cognitive-load-during-effortful-listening-a-study-on-pediatric-subjects-with-bilateral-asymmetric-sensorineural-hearing-loss
#19
Pasquale Marsella, Alessandro Scorpecci, Giulia Cartocci, Sara Giannantonio, Anton Giulio Maglione, Isotta Venuti, Ambra Brizi, Fabio Babiloni
OBJECTIVES: Deaf subjects with hearing aids or cochlear implants generally find it challenging to understand speech in noisy environments where a great deal of listening effort and cognitive load are invested. In prelingually deaf children, such difficulties may have detrimental consequences on the learning process and, later in life, on academic performance. Despite the importance of such a topic, currently, there is no validated test for the assessment of cognitive load during audiological tasks...
August 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28687817/etiologic-and-audiologic-characteristics-of-patients-with-pediatric-onset-unilateral-and-asymmetric-sensorineural-hearing-loss
#20
Pei-Hsuan Lin, Chuan-Jen Hsu, Yi-Hsin Lin, Yin-Hung Lin, Hui-Yu Lee, Chen-Chi Wu, Tien-Chen Liu
Importance: Pediatric-onset unilateral and asymmetric sensorineural hearing loss (SNHL) is a common condition, but in most patients, the cause remains unclear; thus, determination of the hearing outlook is difficult. Objective: To analyze the etiologic and audiologic characteristics of pediatric-onset unilateral and asymmetric SNHL. Design, Setting, and Participants: In this retrospective cohort study performed from January 1, 2008, through December 31, 2016, patients at a tertiary referral center who were diagnosed with pediatric-onset unilateral or asymmetric SNHL were divided into 3 groups according to their hearing levels: unilateral hearing loss with scaled-out levels (UHL-SO), unilateral hearing loss with residual hearing (UHL-RH), and asymmetric hearing loss (AHL)...
July 6, 2017: JAMA Otolaryngology—Head & Neck Surgery
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