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Auditory steady state response

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https://www.readbyqxmd.com/read/27897125/a-comparison-of-thresholds-of-auditory-steady-state-response-and-auditory-brainstem-response-in-healthy-term-babies
#1
Onur Çelik, Görkem Eskiizmir, Uzdan Uz
OBJECTIVE: The goal of this study was to assess the effectiveness of auditory steady-state response (ASSR), determine the cut-off values for each frequency, and detect the best correlated frequencies when compared with the auditory brainstem response (ABR) thresholds in term babies under the age of 12 months. MATERIALS AND METHODS: In total, 88 term babies with a mean age of 2.98 (1-11) months (174 ears) underwent ASSR and ABR tests. The ASSR thresholds for the frequencies of 500, 1000, 2000, and 4000 Hz were compared with the hearing level of the ABR thresholds...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27894891/source-analysis-of-auditory-steady-state-responses-in-acoustic-and-electric-hearing
#2
Robert Luke, Astrid De Vos, Jan Wouters
Speech is a complex signal containing a broad variety of acoustic information. For accurate speech reception, the listener must perceive modulations over a range of envelope frequencies. Perception of these modulations is particularly important for cochlear implant (CI) users, as all commercial devices use envelope coding strategies. Prolonged deafness affects the auditory pathway. However, little is known of how cochlear implantation affects the neural processing of modulated stimuli. This study investigates and contrasts the neural processing of envelope rate modulated signals in acoustic and CI listeners...
November 25, 2016: NeuroImage
https://www.readbyqxmd.com/read/27863036/newborn-hearing-screening-in-prematurity-fate-of-screening-failures-and-auditory-maturation
#3
Hyung Chae Yang, Chung Man Sung, Dong Joo Shin, Yong Beom Cho, Chul Ho Jang, Hyong-Ho Cho
OBJECTIVES: The purpose of this study was to identify delayed auditory maturation and the fate of premature infants who failed the newborn hearing screening (NHS) in neonatal intensive care unit. MATERIALS AND METHODS: A total of 1,375 neonates underwent NHS using the transient evoked otoacoustic emission (TEOAE) in a tertiary hospital between 2007 and 2010 according to the Joint Committee on Infant Hearing Guidelines. In addition, a structured telephone survey was given to caregivers of infants who were lost to follow-up NHS...
November 12, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27835830/a-feed-forward-adaptive-canceller-to-reduce-the-occlusion-effect-in-hearing-aids
#4
Renata Coelho Borges, Márcio Holsbach Costa
Hearing aids are essential devices for social integration of hearing impaired people in order to improve their auditory perception. Recent studies have reported significant dissatisfaction factors that tend to reduce their daily use. The occlusion effect is one important source of complaints. This phenomenon stems from the partial or complete closure of the ventilation opening of the ear-mould, usually performed to prevent feedback effects in high-gain devices. This work presents a new adaptive active-noise-control system to reduce the occlusion effect in small- or unvented hearing aids...
October 18, 2016: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/27833037/atypical-neural-synchronization-to-speech-envelope-modulations-in-dyslexia
#5
Astrid De Vos, Sophie Vanvooren, Jolijn Vanderauwera, Pol Ghesquière, Jan Wouters
A fundamental deficit in the synchronization of neural oscillations to temporal information in speech could underlie phonological processing problems in dyslexia. In this study, the hypothesis of a neural synchronization impairment is investigated more specifically as a function of different neural oscillatory bands and temporal information rates in speech. Auditory steady-state responses to 4, 10, 20 and 40Hz modulations were recorded in normal reading and dyslexic adolescents to measure neural synchronization of theta, alpha, beta and low-gamma oscillations to syllabic and phonemic rate information...
November 7, 2016: Brain and Language
https://www.readbyqxmd.com/read/27815592/-intraoperative-monitoring-of-cochlear-nerve-function-during-cerebello-pontine-angle-surgery
#6
S Rampp, T Rahne, S K Plontke, C Strauss, J Prell
BACKGROUND: Surgical procedures in the cerebello-pontine angle (CPA), e. g. for vestibular schwannoma, have an increased risk for damage to the cochlear nerve. Consequently, hearing deterioration up to complete deafness may result with severe impact on quality of life. Methods for intraoperative monitoring of function may minimize such risks. OBJECTIVE: Review of current methods for intraoperative monitoring of the cochelar nerve and summary of new developments...
November 4, 2016: HNO
https://www.readbyqxmd.com/read/27810831/template-subtraction-to-remove-ci-stimulation-artifacts-in-auditory-steady-state-responses-in-ci-subjects
#7
Hanne Deprez, Robin Gransier, Michael Hofmann, Astrid van Wieringen, Jan Wouters, Marc Moonen
Cochlear implant (CI) stimulation artifacts are currently removed from electrically evoked steady-state response (EASSR) measurements based on a linear interpolation (LI) over the artifact-contaminated signal parts. LI is only successful if CI stimulation artifacts are shorter than the interpulse interval, i.e. for contralateral channels and stimulation pulse rates up to 500 pulses per second (pps). The objective of this paper is to develop and evaluate a template subtraction (TS) method to remove continuous CI stimulation artifacts in order to accurately measure EASSRs...
October 28, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27739939/intraoperative-auditory-steady-state-monitoring-during-surgery-in-the-cerebellopontine-angle-for-estimation-of-postoperative-hearing-classes
#8
Stefan Rampp, Leonhard Rensch, Sebastian Simmermacher, Torsten Rahne, Christian Strauss, Julian Prell
OBJECTIVE Brainstem auditory evoked potentials (BAEPs) have been used for intraoperative monitoring of the auditory nerve for many years. However, BAEPs yield limited information about the expected postoperative hearing quality and speech perception. The auditory steady-state response (ASSR) enables objective audiograms to be obtained in patients under anesthesia. These ASSRs could be used for intraoperative estimation of hearing classes to improve the postoperative outcome and quality of life. Studies investigating the clinical use of ASSRs during total intravenous anesthesia are currently lacking...
October 14, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27732692/the-40-hz-auditory-steady-state-response-in-patients-with-schizophrenia-a-meta-analysis
#9
Hanna Thuné, Marc Recasens, Peter J Uhlhaas
Importance: The neurobiological mechanisms underlying circuit dysfunctions in schizophrenia remain poorly understood. The 40-Hz auditory steady-state response (ASSR) has been suggested as a potential biomarker for schizophrenia. Objectives: To provide a meta-analytical insight into the presence of 40-Hz ASSR impairments in patients with schizophrenia and to examine the effects of the participant group, stimulus parameters, and analysis and recording techniques. Data Sources: Searches were conducted in PubMed and reference lists of appropriate publications to identify relevant studies published from November 1999 to March 2016...
October 12, 2016: JAMA Psychiatry
https://www.readbyqxmd.com/read/27715342/comparison-of-threshold-estimation-in-infants-with-hearing-loss-or-normal-hearing-using-auditory-steady-state-response-evoked-by-narrow-band-ce-chirps-and-auditory-brainstem-response-evoked-by-tone-pips
#10
Franck Michel, Kristoffer Foldager Jørgensen
OBJECTIVE: The objective of this study is to compare air-conduction thresholds obtained with ASSR evoked by narrow band (NB) CE-chirps and ABR evoked by tone pips (tpABR) in infants with various degrees of hearing loss. DESIGN: Thresholds were measured at 500, 1000, 2000 and 4000 Hz. Data on each participant were collected at the same day. STUDY SAMPLE: Sixty-seven infants aged 4 d to 22 months (median age = 96 days), resulting in 57, 52, 87 and 56 ears for 500, 1000, 2000 and 4000 Hz, respectively...
October 7, 2016: International Journal of Audiology
https://www.readbyqxmd.com/read/27693684/auditory-steady-state-responses-as-neural-correlates-of-loudness-growth
#11
Maaike Van Eeckhoutte, Jan Wouters, Tom Francart
The aim of this study was to find an objective estimate of individual, complete loudness growth functions based on auditory steady-state responses. Both normal-hearing and hearing-impaired listeners were involved in two behavioral loudness growth tasks and one EEG recording session. Behavioral loudness growth was measured with Absolute Magnitude Estimation and a Graphic Rating Scale with loudness categories. Stimuli were sinusoidally amplitude-modulated sinusoids with carrier frequencies of either 500 Hz or 2000 Hz, a modulation frequency of 40 Hz, a duration of 1 s, and presented at intensities encompassing the participants' dynamic ranges...
September 29, 2016: Hearing Research
https://www.readbyqxmd.com/read/27649638/increased-bold-signals-elicited-by-high-gamma-auditory-stimulation-of-the-left-auditory-cortex-in-acute-state-schizophrenia
#12
Hironori Kuga, Toshiaki Onitsuka, Yoji Hirano, Itta Nakamura, Naoya Oribe, Hiroaki Mizuhara, Ryota Kanai, Shigenobu Kanba, Takefumi Ueno
Recent MRI studies have shown that schizophrenia is characterized by reductions in brain gray matter, which progress in the acute state of the disease. Cortical circuitry abnormalities in gamma oscillations, such as deficits in the auditory steady state response (ASSR) to gamma frequency (>30-Hz) stimulation, have also been reported in schizophrenia patients. In the current study, we investigated neural responses during click stimulation by BOLD signals. We acquired BOLD responses elicited by click trains of 20, 30, 40 and 80-Hz frequencies from 15 patients with acute episode schizophrenia (AESZ), 14 symptom-severity-matched patients with non-acute episode schizophrenia (NASZ), and 24 healthy controls (HC), assessed via a standard general linear-model-based analysis...
September 13, 2016: EBioMedicine
https://www.readbyqxmd.com/read/27631632/a-looming-bias-in-spatial-hearing-effects-of-acoustic-intensity-and-spectrum-on-categorical-sound-source-localization
#13
Lisa McCarthy, Kirk N Olsen
Continuous increases of acoustic intensity (up-ramps) can indicate a looming (approaching) sound source in the environment, whereas continuous decreases of intensity (down-ramps) can indicate a receding sound source. From psychoacoustic experiments, an "adaptive perceptual bias" for up-ramp looming tonal stimuli has been proposed (Neuhoff, 1998). This theory postulates that (1) up-ramps are perceptually salient because of their association with looming and potentially threatening stimuli in the environment; (2) tonal stimuli are perceptually salient because of an association with single and potentially threatening biological sound sources in the environment, relative to white noise, which is more likely to arise from dispersed signals and nonthreatening/nonbiological sources (wind/ocean)...
September 8, 2016: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/27563737/deficits-in-the-30-hz-auditory-steady-state-response-in-patients-with-major-depressive-disorder
#14
Jingjing Chen, Qin Gong, Fei Wu
The auditory steady-state response (ASSR) is an auditory evoked potential that occurs in response to periodically presented auditory stimuli. The ASSR has drawn attention as a biomarker of psychiatric disorders owing to its connection with neural oscillations as well as its easy and noninvasive recording. Abnormalities in the γ band ASSR have been found consistently in patients with schizophrenia and bipolar disorder. However, although major depressive disorder (MDD) is also part of the common psychiatric diseases, the relationship between the ASSR and MDD has not been characterized sufficiently...
October 19, 2016: Neuroreport
https://www.readbyqxmd.com/read/27556365/human-envelope-following-responses-to-amplitude-modulation-effects-of-aging-and-modulation-depth
#15
Andrew Dimitrijevic, Jamal Alsamri, M Sasha John, David Purcell, Sahara George, Fan-Gang Zeng
OBJECTIVE: To record envelope following responses (EFRs) to monaural amplitude-modulated broadband noise carriers in which amplitude modulation (AM) depth was slowly changed over time and to compare these objective electrophysiological measures to subjective behavioral thresholds in young normal hearing and older subjects. DESIGN: HASH(0x4ebdcb0) PARTICIPANTS: three groups of subjects included a young normal-hearing group (YNH 18 to 28 years; pure-tone average = 5 dB HL), a first older group ("O1"; 41 to 62 years; pure-tone average = 19 dB HL), and a second older group ("O2"; 67 to 82 years; pure-tone average = 35 dB HL)...
September 2016: Ear and Hearing
https://www.readbyqxmd.com/read/27554665/audiometric-evaluation-in-patients-with-alzheimer-s-disease
#16
Alexandre Villeneuve, Caroline Hommet, Charles Aussedat, Emmanuel Lescanne, Kevin Reffet, David Bakhos
The objective of this study is to assess the validity of ASSR as a complementary diagnostic test for peripheral hearing loss by proving a significant correlation between behavioral thresholds and ASSR. The design used in this study is monocentric prospective study from November 2014 to April 2015. The setting used in this study is the ENT-Head and Neck Surgery Department and Geriatrics Department in a French Regional and University Hospital. The participants are patients over 75 years with cognitive impairment (Alzheimer's disease or mild-cognitive impairment) with a Mini-Mental State Examination score under 27/30 and without hearing aids...
August 23, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27510227/-preoperative-auditory-evaluation-and-postoperative-follow-up-in-cochlear-implantees-the-role-of-objective-measures
#17
W Shehata-Dieler, W Großmann
The primary diagnostic aim prior to cochlear implantation is establishment of a comprehensive and multidisciplinary diagnosis, in order to subsequently begin therapy as early as possible. Audiological evaluation prior to implantation employs a test battery-approach, including subjective and objective procedures. Objective measures show high reliability and therefore play a major role in the diagnosis of difficult-to-test subjects such as infants and young children. During postoperative follow-up, objective measures offer a valid method for analyzing the effects of different stimuli on the auditory system...
August 10, 2016: HNO
https://www.readbyqxmd.com/read/27502823/use-of-auditory-steady-state-responses-in-children-and-comparison-with-other-electrophysiological-and-behavioral-tests
#18
M François, E Dehan, M Carlevan, H Dumont
OBJECTIVE: In patients who cannot or will not cooperate in behavioral hearing assessment, electrophysiological examinations are used, but are time-consuming because the subject has to remain immobile. The aim of this study was to assess whether auditory steady-state responses (ASSR) are sufficiently reliable, compared to auditory brainstem responses (ABR) and free-field audiometry, for assessment to begin with ASSR instead of ABR. MATERIAL AND METHODS: A retrospective study was performed between January 2012 and April 2013, including children less than 6 years of age who could not be tested via headphones...
August 5, 2016: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/27475168/assessing-auditory-evoked-potentials-of-wild-harbor-porpoises-phocoena-phocoena
#19
Andreas Ruser, Michael Dähne, Abbo van Neer, Klaus Lucke, Janne Sundermeyer, Ursula Siebert, Dorian S Houser, James J Finneran, Eligius Everaarts, Jolanda Meerbeek, Rune Dietz, Signe Sveegaard, Jonas Teilmann
Testing the hearing abilities of marine mammals under water is a challenging task. Sample sizes are usually low, thus limiting the ability to generalize findings of susceptibility towards noise influences. A method to measure harbor porpoise hearing thresholds in situ in outdoor conditions using auditory steady state responses of the brainstem was developed and tested. The method was used on 15 live-stranded animals from the North Sea during rehabilitation, shortly before release into the wild, and on 12 wild animals incidentally caught in pound nets in Denmark (inner Danish waters)...
July 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27475154/short-term-enhancement-and-suppression-of-dolphin-auditory-evoked-responses-following-echolocation-click-emission
#20
James J Finneran, Roxanne Echon, Jason Mulsow, Dorian S Houser
Biosonar gain control mechanisms in a bottlenose dolphin were investigated by measuring the auditory steady-state response (ASSR) to an external tone while the animal echolocated. The dolphin performed an echo change-detection task that utilized electronically synthesized echoes with echo delays corresponding to 25- and 50-m target range. During the task, amplitude modulated tones with carrier frequencies from 25 to 125 kHz were continuously presented and the instantaneous electroencephalogram stored for later analysis...
July 2016: Journal of the Acoustical Society of America
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