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Auditory cortex

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https://www.readbyqxmd.com/read/28227847/a-compact-representation-for-the-auditory-full-range-response-and-its-fast-denoising-using-an-image-filter-based-on-the-radon-transform
#1
Manuel C Kohl, Daniel J Strauss, Manuel C Kohl, Daniel J Strauss, Daniel J Strauss, Manuel C Kohl
The Auditory Brainstem, Middle-Latency and Late Responses, a class of event-related potentials (ERPs), are of considerable interest in neuroscience research as robust neural correlates of different processing stages along the auditory pathway. While most research to date centers around one of the responses at a time for practical reasons, recent efforts indicate a paradigm shift towards acquiring them together, enabling the simultaneous monitoring of all auditory processing stages from the brainstem to the cortex...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227760/cross-frequency-coupling-during-auditory-perception-in-human-cortex
#2
Urszula Malinowska, Dana Boatman-Reich, Urszula Malinowska, Dana Boatman-Reich, Urszula Malinowska, Dana Boatman-Reich
Cross-frequency coupling plays an important role in coordinating neuronal computations underlying human perception, learning and memory. Here we compared four methods for measuring phase/amplitude coupling (PAC) of theta (4-7 Hz) and high-gamma (70-150 Hz) in intracranial electrocorticographic (ECoG) recordings. Time-frequency spectral and time-domain evoked responses were derived for comparison. All four methods showed significant increases in theta/high-gamma PAC in auditory cortex at sites where significant event-related increases in high-gamma power were also observed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227563/a-study-on-the-effect-of-multisensory-stimulation-in-behaving-rats
#3
Marianna Semprini, Fabio Boi, Valter Tucci, Alessandro Vato, Marianna Semprini, Fabio Boi, Valter Tucci, Alessandro Vato, Fabio Boi, Valter Tucci, Marianna Semprini, Alessandro Vato
This study explored the psychophysical effects of intracortical microstimulation (ICMS) coupled to auditory stimulation during a behavioral detection task in rats. ICMS directed to the sensory areas of the cortex can be instrumental in facilitating operant conditioning behavior. Moreover, multisensory stimulation promotes learning by enabling the subject to access multiple information channels. However, the extent to which multisensory information can be used as a cue to make decisions has not been fully understood...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227249/real-time-algorithms-for-sparse-neuronal-system-identification
#4
Alireza Sheikhattar, Behtash Babadi, Alireza Sheikhattar, Behtash Babadi, Behtash Babadi, Alireza Sheikhattar
We consider the problem of sparse adaptive neuronal system identification, where the goal is to estimate the sparse time-varying neuronal model parameters in an online fashion from neural spiking observations. We develop two adaptive filters based on greedy estimation techniques and regularized log-likelihood maximization. We apply the proposed algorithms to simulated spiking data as well as experimentally recorded data from the ferret's primary auditory cortex during performance of auditory tasks. Our results reveal significant performance gains achieved by the proposed algorithms in terms of sparse identification and trackability, compared to existing algorithms...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226870/effect-of-vagus-nerve-stimulation-on-neural-adaptation-in-thalamo-cortical-system-in-rats
#5
Tomoyo I Shiramatsu, Rie Hitsuyu, Kenji Ibayashi, Ryohei Kanzaki, Kensuke Kawai, Hirokazu Takahashi, Tomoyo I Shiramatsu, Rie Hitsuyu, Kenji Ibayashi, Ryohei Kanzaki, Kensuke Kawai, Hirokazu Takahashi, Kenji Ibayashi, Kensuke Kawai, Ryohei Kanzaki, Hirokazu Takahashi, Tomoyo I Shiramatsu, Rie Hitsuyu
Vagus nerve stimulation (VNS) is a therapy on medically refractory epilepsy, and recently reported to improve cognitive function including learning and memory. The thalamo-cortical system may underlie such VNS-induced cognitive improvements. Thus, the present study targeted the auditory cortex and thalamus in rats, and investigated whether and how VNS modulates stimulus-specific adaptation (SSA) of the neural activity in these nuclei. A depth electrode array recorded auditory evoked potentials from the auditory thalamus and cortex under an oddball paradigm either with or without VNS...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226768/thalamic-gamma-band-desynchronization-in-a-computational-model-of-the-auditory-pathway
#6
Ana E Uriarte, Lars Haab, Narsis Salafzoon, Daniel J Strauss, Ana E Uriarte, Lars Haab, Narsis Salafzoon, Daniel J Strauss, Ana E Uriarte, Lars Haab, Narsis Salafzoon, Daniel J Strauss
Recent studies have focused on modeling the response of the early auditory processing stages to sound stimuli. However, the influence of sound on the higher stages like the auditory thalamus are not well identified. To understand how different sound stimuli affect the response of neurons in these higher stages, it is necessary to model the auditory pathway from the auditory nerve (AN) through the different stages up to the cortex. In this article we present a model of one of the paths through which sound travels from the AN to the cortex...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225736/effects-of-long-term-musical-training-on-cortical-auditory-evoked-potentials
#7
Carolyn J Brown, Eun-Kyung Jeon, Virginia Driscoll, Bruna Mussoi, Shruti Balvalli Deshpande, Kate Gfeller, Paul J Abbas
OBJECTIVE: Evidence suggests that musicians, as a group, have superior frequency resolution abilities when compared with nonmusicians. It is possible to assess auditory discrimination using either behavioral or electrophysiologic methods. The purpose of this study was to determine if the acoustic change complex (ACC) is sensitive enough to reflect the differences in spectral processing exhibited by musicians and nonmusicians. DESIGN: Twenty individuals (10 musicians and 10 nonmusicians) participated in this study...
March 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28224285/abnormal-effective-connectivity-in-the-brain-is-involved-in-auditory-verbal-hallucinations-in-schizophrenia
#8
Baojuan Li, Long-Biao Cui, Yi-Bin Xi, Karl J Friston, Fan Guo, Hua-Ning Wang, Lin-Chuan Zhang, Yuan-Han Bai, Qing-Rong Tan, Hong Yin, Hongbing Lu
Information flow among auditory and language processing-related regions implicated in the pathophysiology of auditory verbal hallucinations (AVHs) in schizophrenia (SZ) remains unclear. In this study, we used stochastic dynamic causal modeling (sDCM) to quantify connections among the left dorsolateral prefrontal cortex (inner speech monitoring), auditory cortex (auditory processing), hippocampus (memory retrieval), thalamus (information filtering), and Broca's area (language production) in 17 first-episode drug-naïve SZ patients with AVHs, 15 without AVHs, and 19 healthy controls using resting-state functional magnetic resonance imaging...
February 21, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28223033/children-with-asd-show-links-between-aberrant-sound-processing-social-symptoms-and-atypical-auditory-interhemispheric-and-thalamocortical-functional-connectivity
#9
Annika C Linke, R Joanne Jao Keehn, Ellyn B Pueschel, Inna Fishman, Ralph-Axel Müller
Autism spectrum disorder (ASD) is a complex and prevalent neurodevelopmental disorder characterized by social and communicative deficits, as well as repetitive behaviors and atypical sensitivity to sensory stimulation. Alterations in network connectivity are widely recognized, but their interplay with social and sensory symptoms remains largely unclear. Here, functional magnetic resonance imaging and diagnostic and behavioral assessments were used in a cohort of children and adolescents with ASD (n=40) and matched typically developing (TD, n=38) controls to examine the relation between auditory processing, interhemispheric and thalamocortical network connectivity, and social-behavioral symptom severity...
January 16, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28222164/comt-and-drd2-ankk-1-gene-gene-interaction-account-for-resetting-of-gamma-neural-oscillations-to-auditory-stimulus-driven-attention
#10
Manuel Garcia-Garcia, Marc Via, Katarzyna Zarnowiec, Iria SanMiguel, Carles Escera, Immaculada C Clemente
Attention capture by potentially relevant environmental stimuli is critical for human survival, yet it varies considerably among individuals. A large series of studies has suggested that attention capture may depend on the cognitive balance between maintenance and manipulation of mental representations and the flexible switch between goal-directed representations and potentially relevant stimuli outside the focus of attention; a balance that seems modulated by a prefrontostriatal dopamine pathway. Here, we examined inter-individual differences in the cognitive control of attention through studying the effects of two single nucleotide polymorphisms regulating dopamine at the prefrontal cortex and the striatum (i...
2017: PloS One
https://www.readbyqxmd.com/read/28220524/language-fmri-and-direct-cortical-stimulation-in-epilepsy-preoperative-planning
#11
Alison Austermuehle, John Cocjin, Reynolds Richard, Shubhi Agrawal, Leigh Sepeta, William D Gaillard, Kareem Zaghloul, Sara Inati, William H Theodore
OBJECTIVE: Presurgical language assessment can help minimize damage to eloquent cortex during resective epilepsy surgery. Two methods for presurgical language mapping are functional MRI (fMRI) and direct cortical stimulation (DCS) of implanted subdural electrodes. We compared fMRI results to DCS to help optimize non-invasive language localization and assess its validity. METHODS: We studied 19 patients referred for presurgical evaluation of drug-resistant epilepsy...
February 21, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28220066/modulation-of-auditory-evoked-magnetic-fields-elicited-by-successive-frequency-modulated-fm-sweeps
#12
Hidehiko Okamoto, Ryusuke Kakigi
In our daily life, we are successively exposed to frequency-modulated (FM) sounds that play an important role in speech and species-specific communication. Previous studies demonstrated that repetitive exposure to identical pure tones resulted in decreased neural activity. However, the effects of repetitively presented FM sounds on neural activity in the human auditory cortex remain unclear. In the present study, we used magnetoencephalography to investigate auditory evoked N1m responses elicited by four successive temporally repeated and superimposed FM sweeps in three sequences: (1) four FM sweeps were identical, (2) four FM sweeps had the same FM direction and rate, but different carrier frequencies, (3) four FM sweeps differed with respect to the FM rate and/or direction and their carrier frequencies...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28219180/-advances-in-effect-of-unilateral-auditory-deprivation-on-sound-localization
#13
J F Liu, J S Dai, N Y Wang
In patients with single-sided deafness (SSD), the interaural time difference and the interaural level difference signals are insufficient or missing, which result in the lack of sound localization ability and the decrease of speech comprehension in the noise environments. SSD can also cause the morphological and functional changes of the central auditory system, resulting in auditory deprivation. In early stage of the development, the auditory center is more susceptible to ambient environment and auditory inputs...
February 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28216127/speaking-related-changes-in-cortical-functional-connectivity-associated-with-assisted-and-spontaneous-recovery-from-developmental-stuttering
#14
Christian A Kell, Katrin Neumann, Marion Behrens, Alexander W von Gudenberg, Anne-Lise Giraud
We previously reported speaking-related activity changes associated with assisted recovery induced by a fluency shaping therapy program and unassisted recovery from developmental stuttering (Kell et al., Brain 2009). While assisted recovery re-lateralized activity to the left hemisphere, unassisted recovery was specifically associated with the activation of the left BA 47/12 in the lateral orbitofrontal cortex. These findings suggested plastic changes in speaking-related functional connectivity between left hemispheric speech network nodes...
February 13, 2017: Journal of Fluency Disorders
https://www.readbyqxmd.com/read/28216125/population-responses-in-primary-auditory-cortex-simultaneously-represent-the-temporal-envelope-and-periodicity-features-in-natural-speech
#15
Daniel A Abrams, Trent Nicol, Travis White-Schwoch, Mitra Hartmann, Steven Zecker, Nina Kraus
Speech perception relies on a listener's ability to simultaneously resolve multiple temporal features in the speech signal. Little is known regarding neural mechanisms that enable the simultaneous coding of concurrent temporal features in the speech signal. Here we show that two categories of temporal features in speech, the low-frequency speech envelope and periodicity cues, are processed by distinct neural mechanisms within the same population of cortical neurons. We measured population activity in primary auditory cortex of anesthetized guinea pig in response to three variants of a naturally produced speech sentence...
February 16, 2017: Hearing Research
https://www.readbyqxmd.com/read/28216123/ablation-of-the-auditory-cortex-results-in-changes-in-the-expression-of-neurotransmission-related-mrnas-in-the-cochlea
#16
Verónica Lamas, José M Juiz, Miguel A Merchán
The auditory cortex (AC) dynamically regulates responses of the Organ of Corti to sound through descending connections to both the medial (MOC) and lateral (LOC) olivocochlear efferent systems. We have recently provided evidence that AC has a reinforcement role in the responses to sound of the auditory brainstem nuclei. In a molecular level, we have shown that descending inputs from AC are needed to regulate the expression of molecules involved in outer hair cell (OHC) electromotility control, such as prestin and the α10 nicotinic acetylcholine receptor (nAchR)...
February 16, 2017: Hearing Research
https://www.readbyqxmd.com/read/28216087/neural-consequences-of-post-exertion-malaise-in-myalgic-encephalomyelitis-chronic-fatigue-syndrome
#17
Dane B Cook, Alan R Light, Kathleen C Light, Gordon Broderick, Morgan R Shields, Ryan J Dougherty, Jacob D Meyer, Stephanie VanRiper, Aaron J Stegner, Laura D Ellingson, Suzanne D Vernon
Post exertion malaise is one of the most debilitating aspects of Myalgic Encephalomyelitis/ Chronic Fatigue Syndrome, yet the neurobiological consequences are largely unexplored. The objective of the study was to determine the neural consequences of acute exercise using functional brain imaging. Fifteen female Myalgic Encephalomyelitis/Chronic Fatigue Syndrome patients and 15 healthy female controls completed 30 minutes of submaximal exercise (70% of peak heart rate) on a cycle ergometer. Symptom assessments (e...
February 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28213115/cross-modal-representation-of-spoken-and-written-word-meaning-in-left-pars-triangularis
#18
Antonietta Gabriella Liuzzi, Rose Bruffaerts, Ronald Peeters, Katarzyna Adamczuk, Emmanuel Keuleers, Simon De Deyne, Gerrit Storms, Patrick Dupont, Rik Vandenberghe
The correspondence in meaning extracted from written versus spoken input remains to be fully understood neurobiologically. Here, in a total of 38 subjects, the functional anatomy of cross-modal semantic similarity for concrete words was determined based on a dual criterion: First, a voxelwise univariate analysis had to show significant activation during a semantic task (property verification) performed with written and spoken concrete words compared to the perceptually matched control condition. Second, in an independent dataset, in these clusters, the similarity in fMRI response pattern to two distinct entities, one presented as a written and the other as a spoken word, had to correlate with the similarity in meaning between these entities...
February 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28211496/the-use-of-bright-and-dark-types-of-humour-is-rooted-in-the-brain
#19
Ilona Papousek, Willibald Ruch, Christian Rominger, Elisabeth Kindermann, Katharina Scheidl, Günter Schulter, Andreas Fink, Elisabeth M Weiss
The ways in which humour can be used are related to the manifold interpersonal functions humour can serve, some of which are positive, and some negative. In the present study, phasic changes in the functional coupling of prefrontal and posterior cortex (EEG coherence) during other people's auditory displays of happy and sad mood were recorded to predict people's typical use of humour in social interactions. Greater use of benevolent humour, the intentions of which are in keeping with the characteristics of "laughing-with" humour, was associated with greater decreases of prefrontal-posterior coupling during the processing of happy laughter...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28207576/relationship-between-peripheral-and-psychophysical-measures-of-amplitude-modulation-detection-in-cochlear-implant-users
#20
Viral D Tejani, Paul J Abbas, Carolyn J Brown
OBJECTIVE: This study investigates the relationship between electrophysiological and psychophysical measures of amplitude modulation (AM) detection. Prior studies have reported both measures of AM detection recorded separately from cochlear implant (CI) users and acutely deafened animals, but no study has made both measures in the same CI users. Animal studies suggest a progressive loss of high-frequency encoding as one ascends the auditory pathway from the auditory nerve to the cortex...
February 15, 2017: Ear and Hearing
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