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https://www.readbyqxmd.com/read/28594958/the-effects-of-different-frequency-treadmill-exercise-on-lipoxin-a4-and-articular-cartilage-degeneration-in-an-experimental-model-of-monosodium-iodoacetate-induced-osteoarthritis-in-rats
#1
Yue Yang, Yang Wang, Yawei Kong, Xiaoning Zhang, Lunhao Bai
The aim was to investigate the effects of different frequencies treadmill exercise with total exercise time being constancy on articular cartilage, lipoxin A4 (LXA4) and the NF-κB pathway in rat model of monosodium iodoacetate-induced osteoarthritis (OA). Fifty male Sprague-Dawley rats were randomly divided into five groups (n = 10): controls (CG), knee OA model (OAG), OA + treadmill exercise once daily (OAE1), OA + treadmill exercise twice daily, rest interval between exercise>4h (OAE2) and OA + treadmill exercise three times daily, rest interval between exercise>4h (OAE3)...
2017: PloS One
https://www.readbyqxmd.com/read/28555601/influence-of-smoking-on-ultra-high-frequency-auditory-sensitivity
#2
Prashanth Prabhu, Gowtham Varma, Kristi Kaveri Dutta, Prajwal Kumar, Swati Goyal
OBJECTIVE: In this study, an attempt was made to determine the effect of smoking on ultra-high-frequency auditory sensitivity. The study also attempted to determine the relationship between the nature of smoking and ultra-high-frequency otoacoustic emissions (OAEs) and thresholds. MATERIALS AND METHODS: The study sample included 25 smokers and 25 non-smokers. A detailed history regarding their smoking habits was collected. High-frequency audiometric thresholds and amplitudes of high-frequency distortion-product OAEs were analyzed for both ears from all participants...
April 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28538833/research-about-suppression-effect-and-auditory-processing-in-individuals-who-stutter
#3
Cláudia Fassin Arcuri, Ana Maria Schiefer, Marisa Frasson de Azevedo
Purpose: To verify the auditory processing abilities and occurrence of the suppression effect of Otoacoustic Emissions (OAE) in individuals who stutter. Methods: The study sample comprised 15 adult individuals who stutter, aged 18-40 years, with stuttering severity ranging from mild to severe, paired according to gender, age, and schooling with individuals without speech complaint or disorder. All participants underwent conventional clinical evaluation, specific stuttering assessment, and basic (audiometry, imitanciometry, and measurement of acoustic reflexes) and specific (auditory processing evaluation and measurement of suppression effect of OAEs) audiological assessments...
May 22, 2017: CoDAS
https://www.readbyqxmd.com/read/28497785/charcoal-evidence-that-rising-atmospheric-oxygen-terminated-early-jurassic-ocean-anoxia
#4
Sarah J Baker, Stephen P Hesselbo, Timothy M Lenton, Luís V Duarte, Claire M Belcher
The Toarcian Oceanic Anoxic Event (T-OAE) was characterized by a major disturbance to the global carbon(C)-cycle, and depleted oxygen in Earth's oceans resulting in marine mass extinction. Numerical models predict that increased organic carbon burial should drive a rise in atmospheric oxygen (pO2) leading to termination of an OAE after ∼1 Myr. Wildfire is highly responsive to changes in pO2 implying that fire-activity should vary across OAEs. Here we test this hypothesis by tracing variations in the abundance of fossil charcoal across the T-OAE...
May 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28496118/quantum-interference-and-heteroaromaticity-of-para-and-meta-linked-bridged-biphenyl-units-in-single-molecular-conductance-measurements
#5
Markus Gantenbein, Lin Wang, Alaa A Al-Jobory, Ali K Ismael, Colin J Lambert, Wenjing Hong, Martin R Bryce
Is there a correlation between the (hetero)aromaticity of the core of a molecule and its conductance in a single molecular junction? To address this question, which is of fundamental interest in molecular electronics, oligo(arylene-ethynylene) (OAE) molecular wires have been synthesized with core units comprising dibenzothiophene, carbazole, dibenzofuran and fluorene. The biphenyl core has been studied for comparison. Two isomeric series have been obtained with 4-ethynylpyridine units linked to the core either at para-para positions (para series 1-5) or meta-meta positions (meta series 6-10)...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28457225/otoacoustic-emissions-in-rural-nicaragua-cost-analysis-and-implications-for-newborn-hearing-screening
#6
Lye-Yeng Wong, Francisca Espinoza, Karen Mojica Alvarez, Dave Molter, James E Saunders
Objective (1) Determine the incidence and risk factors for congenital hearing loss. (2) Perform cost analysis of screening programs. Study Design Proportionally distributed cross-sectional survey. Setting Jinotega, Nicaragua. Subjects and Methods Otoacoustic emissions (OAEs) were used to screen 640 infants <6 months of age from neonatal intensive care unit, institutional, and home birth settings. Data on 15 risk factors were analyzed. Cost of 4 implementation strategies was studied: universal screening, screening at the regional health center (RHC), targeted screening, and screening at the RHC plus targeted screening...
May 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28432471/differentiating-middle-ear-and-medial-olivocochlear-effects-on-transient-evoked-otoacoustic-emissions
#7
Kendra L Marks, Jonathan H Siegel
The response of the inner ear is modulated by the middle ear muscle (MEM) and olivocochlear (OC) efferent systems. Both systems can be activated reflexively by acoustic stimuli delivered to one or both ears. The acoustic middle ear muscle reflex (MEMR) controls the transmission of acoustic signals through the middle ear, while reflex activation of the medial component of the olivocochlear system (the MOCR) modulates cochlear mechanics. The relative prominence of the two efferent systems varies widely between species...
April 21, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28420960/contralateral-inhibition-of-click-and-chirp-evoked-human-compound-action-potentials
#8
Spencer B Smith, Jeffery T Lichtenhan, Barbara K Cone
Cochlear outer hair cells (OHC) receive direct efferent feedback from the caudal auditory brainstem via the medial olivocochlear (MOC) bundle. This circuit provides the neural substrate for the MOC reflex, which inhibits cochlear amplifier gain and is believed to play a role in listening in noise and protection from acoustic overexposure. The human MOC reflex has been studied extensively using otoacoustic emissions (OAE) paradigms; however, these measurements are insensitive to subsequent "downstream" efferent effects on the neural ensembles that mediate hearing...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28414279/short-term-effects-of-radioiodine-therapy-on-auditory-function
#9
Deniz Tuna Edizer, Suat Bilici, Muhammet Yıldız, Özgür Yiğit, Tevfik Fikret Çermik
OBJECTIVE: Radioiodine therapy (RIT) is frequently utilized as an adjunctive treatment option for differentiated thyroid carcinoma following surgical intervention. The side effects of RIT are considered to emerge as a result of radioiodine accumulation in non-thyroidal tissues capable of iodine uptake. We aimed to evaluate the effects of RIT on auditory function. MATERIALS AND METHODS: Patients who had undergone total thyroidectomy and diagnosed to have differentiated thyroid carcinoma were analyzed...
April 17, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28414278/otoacoustic-emissions-in-young-children-with-autism
#10
Memduha Taş, Şule Yılmaz, Erdoğan Bulut, Zahra Polat, Abdullah Taş
OBJECTIVE: The aim of this study is to investigate otoacoustic emissions (OAEs) in young children with autism compared with those in an age-matched control group. MATERIALS AND METHODS: Thirty-eight children with autism aged 3-6 years and 27 typically developing (normally developing) control subjects participated in this study. All the participants had normal hearing and middle-ear function. Auditory brainstem responses were used to determine the hearing status in the autism group...
April 17, 2017: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/28390612/the-results-of-newborn-hearing-screening-by-means-of-transient-otoacoustic-emissions-has-anything-changed-over-10-years
#11
Katarzyna Wroblewska-Seniuk, Grazyna Greczka, Piotr Dabrowski, Witold Szyfter, Jan Mazela
OBJECTIVES: Universal newborn hearing screening (UNHS) has become the standard of care in many countries. The aim of this study was to evaluate the results of UNHS after ten years of the program in Poland and to compare them with the results of 2003. METHODS: In the study, we analyze the results of UNHS in the University Hospital in Poznan, Poland. Between 01.01.2013 and 31.12.2013, 6827 children were examined by means of otoacoustic emissions. RESULTS: Risk factors (RF) were identified in 772 (11...
May 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28303411/identifying-the-origin-of-effects-of-contralateral-noise-on-transient-evoked-otoacoustic-emissions-in-unanesthetized-mice
#12
Yingyue Xu, Mary Ann Cheatham, Jonathan H Siegel
Descending neural pathways in the mammalian auditory system are known to modulate the function of the peripheral auditory system. These pathways include the medial olivocochlear (MOC) efferent innervation to outer hair cells (OHCs) and the acoustic reflex pathways mediating middle ear muscle (MEM) contractions. Based on measurements in humans (Marks and Siegel, companion paper), we applied a sensitive method to attempt to differentiate MEM and MOC reflexes using contralateral acoustic stimulation in mice under different levels of anesthesia...
March 16, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28288358/life-cycle-ghg-evaluation-of-organic-rice-production-in-northern-thailand
#13
Sanwasan Yodkhum, Shabbir H Gheewala, Sate Sampattagul
Greenhouse gas (GHG) emission is one of the serious international environmental issues that can lead to severe damages such as climate change, sea level rise, emerging disease and many other impacts. Rice cultivation is associated with emissions of potent GHGs such as methane and nitrous oxide. Thai rice has been massively exported worldwide however the markets are becoming more competitive than ever since the green market has been hugely promoted. In order to maintain the same level or enhance of competitiveness, Thai rice needs to be considered for environmentally conscious products to meet the international environmental standards...
March 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28197707/hearing-loss-in-vitiligo-current-concepts-and-review
#14
REVIEW
Marrigje Aagje de Jong, Cahtia Adelman, Menachem Gross
The objective of this study was to describe the occurrence, clinical manifestations, audiometric findings, pathogenesis and approach to sensorineural hearing loss (SNHL) among patients diagnosed with vitiligo with a review of the literature. We present a systematic review of the literature on cases of SNHL in patients diagnosed with vitiligo and studies conducted to investigate audiometric changes in such patients. Data on presentation, diagnosis and medical approach were reviewed. A total of 21 studies and case reports revealed at least 102 cases of SNHL in patients diagnosed with vitiligo...
February 14, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28147610/evidence-for-apical-basal-transition-in-the-delay-of-the-reflection-components-of-otoacoustic-emissions
#15
A Moleti, D Pistilli, R Sisto
Stimulus-frequency, transient-evoked, and distortion product otoacoustic emissions (OAEs) have been measured in eight normal-hearing human ears over a wide stimulus level range, with high spectral resolution. The single-reflection component of the response was isolated using time-frequency filtering, and its average delay was measured as a function of frequency and stimulus level. The apical-basal transition was studied by fitting the average delay of the filtered single-reflection OAEs, expressed in number of cycles, to a three-slope power-law function with two knot frequencies...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28147590/compensating-for-ear-canal-acoustics-when-measuring-otoacoustic-emissions
#16
Karolina K Charaziak, Christopher A Shera
Otoacoustic emissions (OAEs) provide an acoustic fingerprint of the inner ear, and changes in this fingerprint may indicate changes in cochlear function arising from efferent modulation, aging, noise trauma, and/or exposure to harmful agents. However, the reproducibility and diagnostic power of OAE measurements is compromised by the variable acoustics of the ear canal, in particular, by multiple reflections and the emergence of standing waves at relevant frequencies. Even when stimulus levels are controlled using methods that circumvent standing-wave problems (e...
January 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28137699/frequency-dependent-fine-structure-in-the-frequency-following-response-the-byproduct-of-multiple-generators
#17
Parker Tichko, Erika Skoe
The frequency-following response (FFR) is an auditory-evoked response recorded at the scalp that captures the spectrotemporal properties of tonal stimuli. Previous investigations report that the amplitude of the FFR fluctuates as a function of stimulus frequency, a phenomenon thought to reflect multiple neural generators phase-locking to the stimulus with different response latencies. When phase-locked responses are offset by different latencies, constructive and destructive phase interferences emerge in the volume-conducted signals, culminating in an attenuation or amplification of the scalp-recorded response in a frequency-specific manner...
May 2017: Hearing Research
https://www.readbyqxmd.com/read/28110343/sex-related-cochlear-impairment-in-cigarette-smokers
#18
Grażyna Lisowska, Jerzy Jochem, Agata Gierlotka, Maciej Misiołek, Wojciech Ścierski
BACKGROUND A number of studies have documented the influence of cigarette smoking on hearing. However, the association between sex and hearing impairment in smokers as measured by otoacoustic emissions (OAEs) has not been clearly established. The aim of this study was to analyze sex-specific effects of smoking on hearing via conventional and ultra-high-frequency pure tone audiometry (PTA), and OAEs, specifically spontaneous OAEs, click-evoked OAEs, and distortion-product OAEs. MATERIAL AND METHODS The study included 84 healthy volunteers aged 25-45 years (mean 34), among them 46 women (25 non-smokers and 21 smokers) and 38 men (16 non-smokers and 22 smokers)...
January 22, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28102004/prevalence-and-causes-of-hearing-impairment-in-fundong-health-district-north-west-cameroon
#19
Silvia Ferrite, Islay Mactaggart, Hannah Kuper, Joseph Oye, Sarah Polack
OBJECTIVE: To estimate the prevalence and causes of hearing impairment in Fundong Health District, North-West Cameroon. METHODS: We selected 51 clusters of 80 people (all ages) through probability proportionate to size sampling. Initial hearing screening was undertaken through an otoacoustic emission (OAE) test. Participants aged 4+ years who failed this test in both ears or for whom an OAE reading could not be taken underwent a manual pure-tone audiometry (PTA) screening...
April 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28099390/to-nearly-come-full-circle-nonoperative-management-of-high-grade-iv-v-blunt-splenic-trauma-is-safe-using-a-protocol-with-routine-angioembolization
#20
Indermeet S Bhullar, Joseph J Tepas, Daniel Siragusa, Todd Loper, Andrew Kerwin, Eric R Frykberg
INTRODUCTION: Nonoperative management (NOM) of hemodynamically stable high-grade (IV-V) blunt splenic trauma remains controversial given the high failure rates (19%) that persist despite angioembolization (AE) protocols. The NOM protocol was modified in 2011 to include mandatory AE of all grade (IV-V) injuries without contrast blush (CB) along with selective AE of grade (I-V) with CB. The purpose of this study was to determine if this new AE (NAE) protocol significantly lowered the failure rates for grade (IV-V) injuries allowing for safe observation without surgery and if the exclusion of grade III injuries allowed for the prevention of unnecessary angiograms without affecting the overall failure rates...
April 2017: Journal of Trauma and Acute Care Surgery
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