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Auditory Processing

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https://www.readbyqxmd.com/read/28934526/mechanisms-of-memory-retrieval-in-slow-wave-sleep
#1
Scott A Cairney, Justyna M Sobczak, Shane Lindsay, M Gareth Gaskell
Study Objectives: Memories are strengthened during sleep. The benefits of sleep for memory can be enhanced by re-exposing the sleeping brain to auditory cues; a technique known as targeted memory reactivation (TMR). Prior studies have not assessed the nature of the retrieval mechanisms underpinning TMR: the matching process between auditory stimuli encountered during sleep and previously encoded memories. We carried out two experiments to address this issue. Methods: In Experiment 1, participants associated words with verbal and nonverbal auditory stimuli before an overnight interval in which subsets of these stimuli were replayed in slow-wave sleep...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28933900/construction-and-updating-of-event-models-in-auditory-event-processing
#2
Markus Huff, Annika E Maurer, Irina Brich, Anne Pagenkopf, Florian Wickelmaier, Frank Papenmeier
Humans segment the continuous stream of sensory information into distinct events at points of change. Between 2 events, humans perceive an event boundary. Present theories propose changes in the sensory information to trigger updating processes of the present event model. Increased encoding effort finally leads to a memory benefit at event boundaries. Evidence from reading time studies (increased reading times with increasing amount of change) suggest that updating of event models is incremental. We present results from 5 experiments that studied event processing (including memory formation processes and reading times) using an audio drama as well as a transcript thereof as stimulus material...
September 21, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28932189/delayed-mismatch-field-latencies-in-autism-spectrum-disorder-with-abnormal-auditory-sensitivity-a-magnetoencephalographic-study
#3
Junko Matsuzaki, Kuriko Kagitani-Shimono, Hisato Sugata, Ryuzo Hanaie, Fumiyo Nagatani, Tomoka Yamamoto, Masaya Tachibana, Koji Tominaga, Masayuki Hirata, Ikuko Mohri, Masako Taniike
Although abnormal auditory sensitivity is the most common sensory impairment associated with autism spectrum disorder (ASD), the neurophysiological mechanisms remain unknown. In previous studies, we reported that this abnormal sensitivity in patients with ASD is associated with delayed and prolonged responses in the auditory cortex. In the present study, we investigated alterations in residual M100 and MMFs in children with ASD who experience abnormal auditory sensitivity. We used magnetoencephalography (MEG) to measure MMF elicited by an auditory oddball paradigm (standard tones: 300 Hz, deviant tones: 700 Hz) in 20 boys with ASD (11 with abnormal auditory sensitivity: mean age, 9...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28930766/palinacousis-palinacousis-seven-new-cases
#4
Madeline C Fields, Lara V Marcuse, Ji-Yeoun Yoo, Saadi Ghatan
PURPOSE: Palinacousis is an auditory illusion of sound persisting or repeating after the cessation of an auditory stimulation. Up until now, approximately 32 cases have been reported. The purpose of this study is to describe an additional seven cases of palinacousis and review our understanding of audition and palinacousis. METHODS: Patients seen in the epilepsy clinic or admitted to the Epilepsy Monitoring Unit (EMU) at The Mount Sinai Hospital who experienced palinacousis were included...
September 15, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28929921/clinical-implications-of-interictal-epileptiform-discharges-in-cognitive-functioning-in-cec-syndrome-with-evolution-into-epileptic-encephalopathy
#5
Paolo Bonanni, Susanna Negrin, Lisa Antoniazzi, Martina Da Rold, Franco Fabbro, Anna Serafini
In epileptic encephalopathies (EE), interictal epileptiform discharges (IEDs) contribute to cognitive impairment. The EE process has been studied in a patient affected by epilepsy with occipital calcification and celiac disease (CEC syndrome) by combining the administration of brain area stimulus specific (visual and auditory) reaction times (RT) during continuous EEG monitoring with the off-line reconstruction of auditory and visual evoked potentials (EP). Visual RT and VEP were abnormal only if recorded concomitantly to the IEDs...
September 20, 2017: Neurocase
https://www.readbyqxmd.com/read/28929903/predictors-of-hearing-aid-outcomes
#6
Enrique A Lopez-Poveda, Peter T Johannesen, Patricia Pérez-González, José L Blanco, Sridhar Kalluri, Brent Edwards
Over 360 million people worldwide suffer from disabling hearing loss. Most of them can be treated with hearing aids. Unfortunately, performance with hearing aids and the benefit obtained from using them vary widely across users. Here, we investigate the reasons for such variability. Sixty-eight hearing-aid users or candidates were fitted bilaterally with nonlinear hearing aids using standard procedures. Treatment outcome was assessed by measuring aided speech intelligibility in a time-reversed two-talker background and self-reported improvement in hearing ability...
January 2017: Trends in Hearing
https://www.readbyqxmd.com/read/28927990/down-for-the-count-the-critical-endpoint-in-ototoxicity-remains-the-cytocochleogram
#7
REVIEW
David V Gauvin, Joshua Yoder, Andrea Koch, Zachary J Zimmermann, Rachel L Tapp
There are three major assays that must be conducted in standard investigational new drug (IND) -enabling ototoxicity study designs: 1) functional acoustic threshold measurements (Auditory Brainstem Respsonse, ABR); 2) otohistopathology and 3) cytocochleograms. We provide evidence to demonstrate the unreliability of auditory threshold shifts (ABRs) to predict cochlear cell death and build a case for conducting full cochlea processing and cell count measurements from the complete cochlea from apex to base.
September 16, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28927552/mismatch-negativity-impairment-is-associated-with-deficits-in-identifying-real-world-environmental-sounds-in-schizophrenia
#8
Yash B Joshi, Barbara Breitenstein, Melissa Tarasenko, Michael L Thomas, Wei-Li Chang, Joyce Sprock, Richard F Sharp, Gregory A Light
BACKGROUND: Patients with schizophrenia (SZ) have impairments in processing auditory information that have been linked to deficits in cognitive and psychosocial functioning. Dysfunction in auditory sensory processing in SZ has been indexed by mismatch negativity (MMN), an event-related potential evoked by a rare, deviant stimulus embedded within a sequence of identical standard stimuli. Although MMN deficits in SZ have been studied extensively, relatively little is known about how these deficits relate to accurately identifying real-world, ecologically-salient sounds...
September 15, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28925372/an-automatic-algorithm-for-blink-artifact-suppression-based-on-iterative-template-matching-application-to-single-channel-recording-of-cortical-auditory-evoked-potentials
#9
Joaquin T Valderrama, Angel de la Torre, Bram Van Dun
Artifact reduction in electroencephalogram (EEG) signals is usually necessary to carry out data analysis appropriately. Despite the large amount of denoising techniques available with a multichannel setup, there is a lack of efficient algorithms that remove (not only detect) blink-artifacts from a single channel EEG, which is of interest in many clinical and research applications. This paper describes and evaluates the Iterative Template Matching and Suppression (ITMS), a new method proposed for detecting and suppressing the artifact associated with the blink activity from a single channel EEG...
September 19, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28925106/myelin-development-plasticity-and-pathology-in-the-auditory-system
#10
REVIEW
Patrick Long, Guoqiang Wan, Michael T Roberts, Gabriel Corfas
Myelin allows for the rapid and precise timing of action potential propagation along neuronal circuits and is essential for healthy auditory system function. In this review we discuss what is currently known about myelin in the auditory system with a focus on the timing of myelination during auditory system development, the role of myelin in supporting peripheral and central auditory circuit function, and how various myelin pathologies compromise auditory information processing. Additionally, in keeping with the increasing recognition that myelin is dynamic and is influenced by experience throughout life, we review the growing evidence that auditory sensory deprivation alters myelin along specific segments of the brain's auditory circuit...
September 19, 2017: Developmental Neurobiology
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
#11
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/28923485/functional-data-analysis-of-single-trial-auditory-evoked-potentials-recorded-in-the-awake-rat
#12
Ondrej Pokora, Jan Kolaicek, Tzai-Wen Chiu, Wei Qiu
Evoked potentials (EPs) reflect neural processing and are widely used to study sensory perception. However, methods of analyzing EP have been limited mostly to the conventional ensemble averaging of EP response trials to a repeated stimulus, and less so to single-trials analysis. Here we applied a new approach - functional data analysis (FDA) - to study auditory EP in the rat model of tinnitus, in which overdoses of salicylate (SS) are known to alter sound perception characteristically, as the same way as in humans...
September 15, 2017: Bio Systems
https://www.readbyqxmd.com/read/28923429/frequency-of-auditory-involvement-and-of-associated-factors-in-patients-with-juvenile-idiopathic-arthritis
#13
Adriana Ivonne Céspedes Cruz, Myriam Méndez Núñez, Eunice Solís Vallejo, Maritza Zeferino Cruz, Alfonso Ragnar Torres Jiménez, Verónica Ocampo Sánchez, Beatriz Flores Meza, Norma Quintana Ruiz
INTRODUCTION: Juvenile idiopathic arthritis (JIA) is a chronic autoimmune disease characterized by the presence of arthritis in children under 16 years of age for more than 6 weeks in the absence of any other known cause. The extra-articular manifestations, especially in the audiovestibular system, are related to the involvement of the joints of the ossicular chain as a result of the inflammatory process in the synovium. Previous clinical studies in pediatric patients have shown conductive or sensorineural hearing loss...
September 8, 2017: Reumatología Clinica
https://www.readbyqxmd.com/read/28921742/processing-of-temporally-patterned-sounds-in-the-auditory-cortex-of-seba-s-short-tailed-bat-carollia-perspicillata
#14
Lisa M Martin, Francisco García-Rosales, M Jerome Beetz, Julio C Hechavarría
This article presents a characterization of cortical responses to artificial and natural temporally-patterned sounds in the bat species Carollia perspicillata, a species that produces vocalizations at rates above 50 Hz. Multi-unit activity was recorded in three different experiments. In the first experiment, amplitude modulated (AM) pure tones were used as stimuli to drive auditory cortex (AC) units. AC units of both ketamine-anesthetized and awake bats could lock their spikes to every cycle of the stimulus modulation envelope, but only if the modulation frequency was below 22 Hz...
September 16, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28919043/neocortical-dynamics-during-whisker-based-sensory-discrimination-in-head-restrained-mice
#15
Fritjof Helmchen, Ariel Gilad, Jerry L Chen
A fundamental task frequently encountered by brains is to rapidly and reliably discriminate between sensory stimuli of the same modality, be it distinct auditory sounds, odors, visual patterns, or tactile textures. A key mammalian brain structure involved in discrimination behavior is the neocortex. Sensory processing not only involves the respective primary sensory area, which is crucial for perceptual detection, but additionally relies on cortico-cortical communication among several regions including higher-order sensory areas as well as frontal cortical areas...
September 14, 2017: Neuroscience
https://www.readbyqxmd.com/read/28917697/trajectories-of-brain-system-maturation-from-childhood-to-older-adulthood-implications-for-lifespan-cognitive-functioning
#16
Raluca Petrican, Margot J Taylor, Cheryl L Grady
The human brain's intrinsic functional architecture reflects behavioural history and can help elucidate the neural mechanisms underlying age-related cognitive changes. To probe this issue, we used resting state (N = 586) and behavioural (N = 255) data from a lifespan sample and tested the interactions among ten intrinsic neural systems, derived from a well-established whole-brain parcellation. Our results revealed three distinguishable profiles, whose expression strengthened with increasing age and which characterized developmental differences in connectivity within the ten systems, between networks thought to underlie cognitive control and non-control systems, and among the non-control networks...
September 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28917659/sonification-of-scalp-recorded-frequency-following-responses-ffrs-offers-improved-response-detection-over-conventional-statistical-metrics
#17
Gavin M Bidelman
BACKGROUND: The human frequency-following response (FFR) is a neurophonic potential used to examine the brain's encoding of complex sounds (e.g., speech) and monitor neuroplastic changes in auditory processing. Given the FFR's low amplitude (order of nanovolts), current conventions in literature recommend collecting several thousand trials to obtain a robust evoked response with adequate signal-to-noise ratio. NEW METHOD: By exploiting the spectrotemporal fidelity of the response, we examined whether auditory playbacks (i...
September 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28917446/amplitude-modulation-rate-dependent-topographic-organization-of-the-auditory-steady-state-response-in-human-auditory-cortex
#18
Nathan Weisz, Chrysoula Lithari
Periodic modulations of an acoustic feature, such as amplitude over a certain frequency range, leads to phase locking of neural responses to the envelope of the modulation. Using electrophysiological methods this neural activity pattern, also called the auditory steady-state response (aSSR), is visible following frequency transformation of the evoked response as a clear spectral peak at the modulation frequency. Despite several studies employing the aSSR that show, for example, strongest responses for ∼40 Hz and an overall right-hemispheric dominance, it has not been investigated so far to what extent within auditory cortex different modulation frequencies elicit aSSRs at a homogenous source or whether the localization of the aSSR is topographically organized in a systematic manner...
September 11, 2017: Hearing Research
https://www.readbyqxmd.com/read/28917014/more-insight-into-the-interplay-of-response-selection-and-visual-attention-in-dual-tasks-masked-visual-search-and-response-selection-are-performed-in-parallel
#19
Christina B Reimer, Torsten Schubert
Both response selection and visual attention are limited in capacity. According to the central bottleneck model, the response selection processes of two tasks in a dual-task situation are performed sequentially. In conjunction search, visual attention is required to select the items and to bind their features (e.g., color and form), which results in a serial search process. Search time increases as items are added to the search display (i.e., set size effect). When the search display is masked, visual attention deployment is restricted to a brief period of time and target detection decreases as a function of set size...
September 15, 2017: Psychological Research
https://www.readbyqxmd.com/read/28916793/oligodendroglial-excitability-mediated-by-glutamatergic-inputs-and-nav1-2-activation
#20
Emmanuelle Berret, Tara Barron, Jie Xu, Emily Debner, Eun Jung Kim, Jun Hee Kim
Oligodendrocyte (OL) maturation and axon-glial communication are required for proper myelination in the developing brain. However, physiological properties of OLs remain largely uncharacterized in different brain regions. The roles of oligodendroglial voltage-activated Na(+) channels (Nav) and electrical excitability in relation to maturation to the myelinating stage are controversial, although oligodendroglial excitability is potentially important for promoting axon myelination. Here we show spiking properties of OLs and their role in axon-glial communication in the auditory brainstem...
September 15, 2017: Nature Communications
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