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Auditory cortex

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https://www.readbyqxmd.com/read/29352610/neural-representation-of-octave-illusion-in-the-human-cortex-revealed-with-functional-magnetic-resonance-imaging
#1
Keita Tanaka, Hiroki Kurasaki, Shinya Kuriki
The auditory "octave illusion" arises when dichotic tones, presented one octave apart, alternate rapidly between the ears. This study aimed to explore the link between the perception of illusory pitches and brain activity during presentation of dichotic tones. We conducted a behavioral study of how participants perceived binaural dichotic tones of octave illusions and classified them, based on the reported percepts, in an illusion (ILL) group, without an illusion (non-ILL) group, and others. We recorded brain activity using functional magnetic resonance imaging and analyzed the activation due to dichotic illusion tones...
January 8, 2018: Hearing Research
https://www.readbyqxmd.com/read/29346017/the-role-of-posterior-parietal-cortex-in-beat-based-timing-perception-a-continuous-theta-burst-stimulation-study
#2
Jessica M Ross, John R Iversen, Ramesh Balasubramaniam
There is a growing interest in how the brain's motor systems contribute to the perception of musical rhythms. The Action Simulation for Auditory Prediction hypothesis proposes that the dorsal auditory stream is involved in bidirectional interchange between auditory perception and beat-based prediction in motor planning structures via parietal cortex [Patel, A. D., & Iversen, J. R. The evolutionary neuroscience of musical beat perception: The Action Simulation for Auditory Prediction (ASAP) hypothesis. Frontiers in Systems Neuroscience, 8, 57, 2014]...
January 18, 2018: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/29344647/autophagy-regulates-the-degeneration-of-the-auditory-cortex-through-the-ampk-mtor-ulk1-signaling-pathway
#3
Jie Yuan, Xueyan Zhao, Yujuan Hu, Haiying Sun, Guoqing Gong, Xiang Huang, Xubo Chen, Mingyu Xia, Chen Sun, Qilin Huang, Yu Sun, Wen Kong, Weijia Kong
Presbycusis is the most common sensory impairment associated with aging; however, the underlying molecular mechanism remains unclear. Autophagy has been demonstrated to serve a key role in diverse diseases; however, no studies have examined its function in central presbycusis. The aim of the present study was to investigate the changes of autophagy in the physiological processes of the auditory cortex and its role in the degeneration of the auditory cortex, as well as the related mechanisms using naturally aging rats and a D‑galactose (D‑gal)‑induced mimetic rat model of aging...
January 17, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29343771/magnetoencephalographic-correlates-of-perceptual-state-during-auditory-bistability
#4
Robert D Sanders, Joel S Winston, Gareth R Barnes, Geraint Rees
Bistability occurs when two alternative percepts can be derived from the same physical stimulus. To identify the neural correlates of specific subjective experiences we used a bistable auditory stimulus and determined whether the two perceptual states could be distinguished electrophysiologically. Fourteen participants underwent magnetoencephalography while reporting their perceptual experience while listening to a continuous bistable stream of auditory tones. Participants reported bistability with a similar overall proportion of the two alternative percepts (52% vs 48%)...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343230/the-sybil-aa-real-time-fmri-neurofeedback-study-protocol-of-a-single-blind-randomized-controlled-trial-in-alcohol-use-disorder
#5
Martin Fungisai Gerchen, Martina Kirsch, Nathalie Bahs, Patrick Halli, Sarah Gerhardt, Axel Schäfer, Wolfgang H Sommer, Falk Kiefer, Peter Kirsch
BACKGROUND: Alcohol Use Disorder is a highly prevalent mental disorder which puts a severe burden on individuals, families, and society. The treatment of Alcohol Use Disorder is challenging and novel and innovative treatment approaches are needed to expand treatment options. A promising neuroscience-based intervention method that allows targeting cortical as well as subcortical brain processes is real-time functional magnetic resonance imaging neurofeedback. However, the efficacy of this technique as an add-on treatment of Alcohol Use Disorder in a clinical setting is hitherto unclear and will be assessed in the Systems Biology of Alcohol Addiction (SyBil-AA) neurofeedback study...
January 17, 2018: BMC Psychiatry
https://www.readbyqxmd.com/read/29342042/long-term-administration-of-salicylate-induced-changes-in-bdnf-expression-and-creb-phosphorylation-in-the-auditory-cortex-of-rats
#6
Bin Yi, Cong Wu, Runjie Shi, Kun Han, Haibin Sheng, Bei Li, Ling Mei, Xueling Wang, Zhiwu Huang, Hao Wu
HYPOTHESIS: We investigated whether salicylate induces tinnitus through alteration of the expression levels of brain-derived neurotrophic factor (BDNF), proBDNF, tyrosine kinase receptor B (TrkB), cAMP-responsive element-binding protein (CREB), and phosphorylated CREB (p-CREB) in the auditory cortex (AC). BACKGROUND: Salicylate medication is frequently used for long-term treatment in clinical settings, but it may cause reversible tinnitus. Salicylate-induced tinnitus is associated with changes related to central auditory neuroplasticity...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29333487/activation-of-the-medial-prefrontal-cortex-reverses-cognitive-and-respiratory-symptoms-in-a-mouse-model-of-rett-syndrome
#7
C James Howell, Michael P Sceniak, Min Lang, Wenceslas Krakowiecki, Fatimah E Abouelsoud, Saloni U Lad, Heping Yu, David M Katz
Rett syndrome (RTT) is a severe neurodevelopmental disorder caused by loss-of-function mutations in the gene encoding methyl-CpG-binding protein 2 (MeCP2; Amir et al., 1999), a transcriptional regulatory protein (Klose et al., 2005). Mouse models of RTT (Mecp2 mutants) exhibit excitatory hypoconnectivity in the medial prefrontal cortex (mPFC; Sceniak et al., 2015), a region critical for functions that are abnormal in RTT patients, ranging from learning and memory to regulation of visceral homeostasis (Riga et al...
November 2017: ENeuro
https://www.readbyqxmd.com/read/29329984/infralimbic-dopamine-d2-receptors-mediate-glucocorticoid-induced-facilitation-of-auditory-fear-memory-extinction-in-rats
#8
Masoumeh Dadkhah, Payman Raise Abdullahi, Ali Rashidy-Pour, Hamid Reza Sameni, Abbas Ali Vafaei
The infralimbic (IL) cortex of the medial prefrontal cortex plays an important role in the extinction of fear memory. Also, it has been showed that both brain glucocorticoid and dopamine receptors are involved in many processes such as fear extinction that drive learning and memory; however, the interaction of these receptors in the IL cortex remains unclear. We examined a putative interaction between the effects of glucocorticoid and dopamine receptors stimulation in the IL cortex on fear memory extinction in an auditory fear conditioning paradigm in male rats...
January 9, 2018: Brain Research
https://www.readbyqxmd.com/read/29325855/gating-of-long-term-potentiation-ltp-in-the-thalamocortical-auditory-system-of-rats-by-serotonergic-5-ht-receptors
#9
Karen K Y Lee, Chloe N Soutar, Hans C Dringenberg
The neuromodulator serotonin (5-hydroxytryptamine, 5-HT) plays an important role in controlling the induction threshold and maintenance of long-term potentiation (LTP) in the visual cortex and hippocampus of rodents. Serotonergic fibers also innervate the rodent primary auditory cortex (A1), but the regulation of A1 plasticity by 5-HT receptors (5-HTRs) is largely uncharted. Thus, we examined the role of several, predominant 5-HT receptor classes (5-HT1ARs, 5-HT2Rs, and 5-HT3Rs) in gating in vivo LTP induction at A1 synapses of adult, urethane-anesthetized rats...
January 8, 2018: Brain Research
https://www.readbyqxmd.com/read/29324988/evidence-for-verbal-memory-enhancement-with-electrical-brain-stimulation-in-the-lateral-temporal-cortex
#10
Michal T Kucewicz, Brent M Berry, Laura R Miller, Fatemeh Khadjevand, Youssef Ezzyat, Joel M Stein, Vaclav Kremen, Benjamin H Brinkmann, Paul Wanda, Michael R Sperling, Richard Gorniak, Kathryn A Davis, Barbara C Jobst, Robert E Gross, Bradley Lega, Jamie Van Gompel, S Matt Stead, Daniel S Rizzuto, Michael J Kahana, Gregory A Worrell
Direct electrical stimulation of the human brain can elicit sensory and motor perceptions as well as recall of memories. Stimulating higher order association areas of the lateral temporal cortex in particular was reported to activate visual and auditory memory representations of past experiences (Penfield and Perot, 1963). We hypothesized that this effect could be used to modulate memory processing. Recent attempts at memory enhancement in the human brain have been focused on the hippocampus and other mesial temporal lobe structures, with a few reports of memory improvement in small studies of individual brain regions...
January 8, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29323226/lateral-and-basal-amygdala-account-for-opposite-behavioral-responses-during-the-long-term-expression-of-fearful-memories
#11
Eugenio Manassero, Annamaria Renna, Luisella Milano, Benedetto Sacchetti
Memories of fearful events can be maintained throughout the lifetime of animals. Here we showed that lesions of the lateral nucleus (LA) performed shortly after training impaired the retention of long-term memories, assessed by the concomitant measurement of two dissociable defensive responses, freezing and avoidance in rats. Strikingly, when LA lesions were performed four weeks after training, rats did not show freezing to a learned threat stimulus, but they were able to direct their responses away from it...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321232/hypermyelination-of-the-left-auditory-cortex-in-developmental-dyslexia
#12
Michael A Skeide, Pierre-Louis Bazin, Robert Trampel, Andreas Schäfer, Claudia Männel, Katharina von Kriegstein, Angela D Friederici
OBJECTIVE: Cortical malformations are documented postmortem in speech processing areas of the dyslexic human brain. The goal of this pilot study was to find out if such anatomic anomalies can be detected noninvasively and in vivo. METHODS: We developed a reconstruction of left perisylvian cortex profiles at a resolution of 400 μm using T1 data acquired with ultra-high-field MRI at 7T. Cortical thickness, myelinated cortical thickness, and layer-wise myelination were then compared in 6 men with developmental dyslexia and 6 healthy controls matched for age, sex, handedness, education level, and nonverbal IQ...
January 10, 2018: Neurology
https://www.readbyqxmd.com/read/29321145/does-auditory-cortex-code-temporal-information-from-acoustic-and-cochlear-implant-stimulation-in-a-similar-way
#13
Charlotte Amalie Navntoft, Victor Adenis
No abstract text is available yet for this article.
January 10, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29317325/motor-cortex-compensates-for-lack-of-sensory-and-motor-experience-during-auditory-speech-perception
#14
Judith Schmitz, Eleonora Bartoli, Laura Maffongelli, Luciano Fadiga, Nuria Sebastian-Galles, Alessandro D'Ausilio
Listening to speech has been shown to activate motor regions, as measured by corticobulbar excitability. In this experiment, we explored if motor regions are also recruited during listening to non-native speech, for which we lack both sensory and motor experience. By administering Transcranial Magnetic Stimulation (TMS) over the left motor cortex we recorded corticobulbar excitability of the lip muscles when Italian participants listened to native-like and non-native German vowels. Results showed that lip corticobulbar excitability increased for a combination of lip use during articulation and non-nativeness of the vowels...
January 6, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29311673/frequency-selectivity-of-echo-responses-in-the-mouse-primary-auditory-cortex
#15
Meng Wang, Ruijie Li, Jingcheng Li, Jianxiong Zhang, Xiaowei Chen, Shaoqun Zeng, Xiang Liao
In the primary auditory cortex (A1), neuronal ensembles are activated relative to anticipated sound events following rhythmic stimulation, but whether the echo responses of the neurons are related to their frequency selectivity remains unknown. Therefore, we used in vivo two-photon Ca2+ imaging to record the neuronal activities in the mouse A1 to elucidate the relationship between their echo responses and frequency selectivity. We confirmed the presence of echo responses in a subgroup of mouse Layer 2/3 A1 neurons following a train of rhythmic pure tone stimulation...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29305917/motor-imagery-of-voluntary-muscle-relaxation-of-the-foot-induces-a-temporal-reduction-of-corticospinal-excitability-in-the-hand
#16
Kouki Kato, Kazuyuki Kanosue
The object of this study was to clarify how the motor imagery of foot muscle relaxation influences corticospinal excitability for the ipsilateral hand. Twelve participants volitionally relaxed their right foot from a dorsiflexed position (actual relaxation), or imaged the same movement (imagery relaxation) in response to an auditory cue. Transcranial magnetic stimulation (TMS) was delivered to the hand area of the left primary motor cortex at different time intervals after an auditory cue. Motor evoked potentials (MEPs) were recorded from the right extensor carpi radialis (ECR) and flexor carpi radialis (FCR)...
January 3, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29305294/cortical-folding-abnormalities-in-patients-with-schizophrenia-who-have-persistent-auditory-verbal-hallucinations
#17
Katharina M Kubera, Philipp A Thomann, Dusan Hirjak, Anja Barth, Fabio Sambataro, Nenad Vasic, Nadine D Wolf, Karel Frasch, R Christian Wolf
In schizophrenia temporal cortical volume loss differs between patients presenting with persistent auditory verbal hallucinations (pAVH) in contrast to those without hallucinatory symptoms (nAVH). However, it is unknown whether this deficit reflects a neural signature of neurodevelopmental origin or if abnormal temporal cortical volume is reflective of factors which may be relevant at later stages of the disorder. Here, we tested the hypothesis that local gyrification index (LGI) in regions of the temporal cortex differs between patients with pAVH (n=10) and healthy controls (n=14), and that abnormal temporal LGI discriminates between pAVH and nAVH (n=10)...
January 2, 2018: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29305037/transauricular-vagus-nerve-stimulation-at-auricular-acupoints-kindey-co10-yidan-co11-liver-co12-and-shenmen-tf4-can-induce-auditory-and-limbic-cortices-activation-measured-by-fmri
#18
Liyan Peng, Ketao Mu, Aiguo Liu, Liangqiang Zhou, Yueyue Gao, Imrit Tejvansh Shenoy, Zhigang Mei, Qingguo Chen
The purpose of this study was to explore the central mechanism of transauricular vagus nerve stimulation (taVNS) to human by fMRI and to find a suitable taVNS site for potential tinnitus treatment. 24 healthy subjects aged between 28 and 38 years were enrolled in the experiment. 8 subjects were stimulated in the auricular acupoints Kindey (CO10), Yidan (CO11), Liver (CO12) and Shenmen (TF4) in the left ear, 8 subjects were stimulated at the anterior wall of the auditory canal and left lower limb as an anterior stimulation group; 8 persons who were arranged in a sham group received taVNS at the left ear lobe and tail of the helix...
December 24, 2017: Hearing Research
https://www.readbyqxmd.com/read/29304065/bilateral-theta-burst-magnetic-stimulation-influence-on-event-related-brain-potentials
#19
Nuno Pinto, Marta Duarte, Helena Gonçalves, Ricardo Silva, Jorge Gama, Maria Vaz Pato
Theta-burst stimulation (TBS) can be a non-invasive technique to modulate cognitive functions, with promising therapeutic potential, but with some contradictory results. Event related potentials are used as a marker of brain deterioration and can be used to evaluate TBS-related cognitive performance, but its use remains scant. This study aimed to study bilateral inhibitory and excitatory TBS effects upon neurocognitive performance of young healthy volunteers, using the auditory P300' results. Using a double-blind sham-controlled study, 51 healthy volunteers were randomly assigned to five different groups, two submitted to either excitatory (iTBS) or inhibitory (cTBS) stimulation over the left dorsolateral pre-frontal cortex (DLPFC), two other actively stimulated the right DLPFC and finally a sham stimulation group...
2018: PloS One
https://www.readbyqxmd.com/read/29302822/robust-neuronal-discrimination-in-primary-auditory-cortex-despite-degradations-of-spectro-temporal-acoustic-details-comparison-between-guinea-pigs-with-normal-hearing-and-mild-age-related-hearing-loss
#20
Yonane Aushana, Samira Souffi, Jean-Marc Edeline, Christian Lorenzi, Chloé Huetz
This study investigated to which extent the primary auditory cortex of young normal-hearing and mild hearing-impaired aged animals is able to maintain invariant representation of critical temporal-modulation features when sounds are submitted to degradations of fine spectro-temporal acoustic details. This was achieved by recording ensemble of cortical responses to conspecific vocalizations in guinea pigs with either normal hearing or mild age-related sensorineural hearing loss. The vocalizations were degraded using a tone vocoder...
January 4, 2018: Journal of the Association for Research in Otolaryngology: JARO
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