keyword
MENU ▼
Read by QxMD icon Read
search

Auditory cortex

keyword
https://www.readbyqxmd.com/read/28432140/visually-evoked-3-5-hz-membrane-potential-oscillations-reduce-the-responsiveness-of-visual-cortex-neurons-in-awake-behaving-mice
#1
Michael C Einstein, Pierre-Olivier Polack, Duy T Tran, Peyman Golshani
Low frequency membrane potential (Vm) oscillations were once thought to only occur in sleeping and anesthetized states. Recently, low frequency Vm oscillations have been described in inactive awake animals, but it is unclear if they shape sensory processing in neurons and whether they occur during active awake behavioral states. To answer these questions, we performed two-photon guided whole-cell Vm recordings from primary visual cortex layer 2/3 excitatory and inhibitory neurons in awake mice during passive visual stimulation and performance of visual and auditory discrimination tasks...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28432139/feature-selective-attention-adaptively-shifts-noise-correlations-in-primary-auditory-cortex
#2
Joshua Downer, Brittany Rapone, Jessica Verhein, Kevin N O'Connor, Mitchell L Sutter
Sensory environments often contain an overwhelming amount of information, with both relevant and irrelevant information competing for neural resources. Feature attention mediates this competition by selecting the sensory features needed to form a coherent percept. How attention affects the activity of populations of neurons to support this process is poorly understood because population coding is typically studied through simulations in which one sensory feature is encoded without competition. Therefore, to study the effects of feature attention on population-based neural coding, investigations must be extended to include stimuli with both relevant and irrelevant features...
April 21, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28431949/classification-of-eeg-signals-to-identify-variations-in-attention-during-motor-task-execution
#3
Susan Aliakbaryhosseinabadi, Ernest Nlandu Kamavuako, Ning Jiang, Dario Farina, Natalie Mrachacz-Kersting
BACKGROUND: Brain-computer interface (BCI) systems in neuro-rehabilitation use brain signals to control external devices. User status such as attention affects BCI performance; thus detecting the user's attention drift due to internal or external factors is essential for high detection accuracy. NEW METHOD: An auditory oddball task was applied to divert the users' attention during a simple ankle dorsiflexion movement. Electroencephalogram signals were recorded from eighteen channels...
April 18, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28429383/altered-eigenvector-centrality-is-related-to-local-resting-state-network-functional-connectivity-in-patients-with-longstanding-type-1-diabetes-mellitus
#4
Eelco van Duinkerken, Menno M Schoonheim, Richard G IJzerman, Annette C Moll, Jesus Landeira-Fernandez, Martin Klein, Michaela Diamant, Frank J Snoek, Frederik Barkhof, Alle-Meije Wink
INTRODUCTION: Longstanding type 1 diabetes (T1DM) is associated with microangiopathy and poorer cognition. In the brain, T1DM is related to increased functional resting-state network (RSN) connectivity in patients without, which was decreased in patients with clinically evident microangiopathy. Subcortical structure seems affected in both patient groups. How these localized alterations affect the hierarchy of the functional network in T1DM is unknown. Eigenvector centrality mapping (ECM) and degree centrality are graph theoretical methods that allow determining the relative importance (ECM) and connectedness (degree centrality) of regions within the whole-brain network hierarchy...
April 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28428741/assessing-auditory-processing-deficits-in-tinnitus-and-hearing-impaired-patients-with-the-auditory-behavior-questionnaire
#5
Isabel Diges, Francisco Simón, Pedro Cobo
Background and Purpose: Auditory processing disorders (APD), tinnitus and hearing loss (HL) are typical issues reported by patients in audiologic clinics. These auditory impairments can be concomitant or mutually excluding. APD are not necessarily accompanied by significant HL, whereas many adults exhibit peripheral HL and typical cognitive deficits often associated with APD. Since HL, tinnitus and APD affects to several parts of the ascending auditory pathway from the periphery to the auditory cortex, there could be some interrelationship between them...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28424401/-the-map-of-auditory-function
#6
So Fujimoto, Yutaka Komura
Brodmann areas 41 and 42 are located in the superior temporal gyrus and regarded as auditory cortices. The fundamental function in audition is frequency analysis; however, the findings on tonotopy maps of the human auditory cortex were not unified until recently when they were compared to the findings on inputs and outputs of the monkey auditory cortex. The auditory cortex shows plasticity after conditioned learning and surgery of cochlear implant. It is also involved in speech perception, music appreciation, and auditory hallucination in schizophrenia through interactions with other brain areas, such as the thalamus, frontal cortex, and limbic systems...
April 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/28423316/diversity-in-excitation-inhibition-mismatch-underlies-local-functional-heterogeneity-in-the-rat-auditory-cortex
#7
Can Tao, Guangwei Zhang, Chang Zhou, Lijuan Wang, Sumei Yan, Huizhong Whit Tao, Li I Zhang, Yi Zhou, Ying Xiong
Cortical neurons are heterogeneous in their functional properties. This heterogeneity is fundamental for the processing of different features of sensory information. However, functional diversity within a local group of neurons is poorly understood. Here, we demonstrate that neighboring cortical neurons in layer 5 but not those of layer 4 of the rat anterior auditory field (AAF) exhibited a surprisingly high level of diversity in tonal receptive fields. In vivo whole-cell voltage-clamp recordings revealed that the diversity of frequency representation was due to a spectral mismatch between synaptic excitation and inhibition to varying degrees...
April 18, 2017: Cell Reports
https://www.readbyqxmd.com/read/28422990/sensory-cortical-response-to-uncertainty-and-low-salience-during-recognition-of-affective-cues-in-musical-intervals
#8
Fernando Bravo, Ian Cross, Emmanuel Andreas Stamatakis, Martin Rohrmeier
Previous neuroimaging studies have shown an increased sensory cortical response (i.e., heightened weight on sensory evidence) under higher levels of predictive uncertainty. The signal enhancement theory proposes that attention improves the quality of the stimulus representation, and therefore reduces uncertainty by increasing the gain of the sensory signal. The present study employed functional magnetic resonance imaging (fMRI) to investigate the neural correlates for ambiguous valence inferences signaled by auditory information within an emotion recognition paradigm...
2017: PloS One
https://www.readbyqxmd.com/read/28420951/shared-neural-mechanisms-for-the-prediction-of-own-and-partner-musical-sequences-after-short-term-piano-duet-training
#9
Claudia Lappe, Sabine Bodeck, Markus Lappe, Christo Pantev
Predictive mechanisms in the human brain can be investigated using markers for prediction violations like the mismatch negativity (MMN). Short-term piano training increases the MMN for melodic and rhythmic deviations in the training material. This increase occurs only when the material is actually played, not when it is only perceived through listening, suggesting that learning predictions about upcoming musical events are derived from motor involvement. However, music is often performed in concert with others...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28420788/reconstructing-the-spectrotemporal-modulations-of-real-life-sounds-from-fmri-response-patterns
#10
Roberta Santoro, Michelle Moerel, Federico De Martino, Giancarlo Valente, Kamil Ugurbil, Essa Yacoub, Elia Formisano
Ethological views of brain functioning suggest that sound representations and computations in the auditory neural system are optimized finely to process and discriminate behaviorally relevant acoustic features and sounds (e.g., spectrotemporal modulations in the songs of zebra finches). Here, we show that modeling of neural sound representations in terms of frequency-specific spectrotemporal modulations enables accurate and specific reconstruction of real-life sounds from high-resolution functional magnetic resonance imaging (fMRI) response patterns in the human auditory cortex...
April 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28419851/an-emergent-functional-parcellation-of-the-temporal-cortex
#11
REVIEW
Rebecca L Jackson, Claude J Bajada, Grace E Rice, Lauren L Cloutman, Matthew A Lambon Ralph
The temporal lobe has been associated with various cognitive functions which include memory, auditory cognition and semantics. However, at a higher level of conceptualisation, all of the functions associated with the temporal lobe can be considered as lying along one major axis; from modality-specific to modality-general processing. This paper used a spectral reordering technique on resting-state and task-based functional data to extract the major organisational axis of the temporal lobe in a bottom-up, data-driven fashion...
April 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/28419056/response-characteristics-of-the-rat-anterior-cingulate-cortex-to-ultrasonic-communicative-vocalizations
#12
Yumi Saito, Kazuo Okanoya
Emotional communication involves transmitting information on affective states. Rat 50- and 22-kHz ultrasonic vocalizations (USVs) are emotional communication signals that reflect positive or negative states, respectively. In general, emotional communication signals that elicit changes in event-related potentials (ERPs), suggesting a specific mechanism for processing these signals. As this is observed in several communication systems including humans, we hypothesized that rat USVs can also trigger such changes...
April 17, 2017: Neuroreport
https://www.readbyqxmd.com/read/28415897/electric-field-navigated-transcranial-magnetic-stimulation-for-chronic-tinnitus-a-randomized-placebo-controlled-study
#13
Hanna Sahlsten, Juuso Virtanen, Juho Joutsa, Katri Niinivirta-Joutsa, Eliisa Löyttyniemi, Reijo Johansson, Janika Paavola, Tero Taiminen, Noora Sjösten, Jaakko Salonen, Anu Holm, Esa Rauhala, Satu K Jääskeläinen
OBJECTIVE: Repetitive transcranial magnetic stimulation (rTMS) may alleviate tinnitus. We evaluated effects of electric field (E-field) navigated rTMS targeted according to tinnitus pitch. No controlled studies have investigated anatomically accurate E-field-rTMS for tinnitus. DESIGN: Effects of E-field-rTMS were evaluated in a prospective randomised placebo-controlled 6-month follow-up study on parallel groups. Patients received 10 sessions of 1 Hz rTMS or placebo targeted to the left auditory cortex corresponding to tonotopic representation of tinnitus pitch...
April 18, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28414105/functional-reorganization-after-hemispherectomy-in-humans-and-animal-models-what-can-we-learn-about-the-brain-s-resilience-to-extensive-unilateral-lesions
#14
REVIEW
Luca Sebastianelli, Viviana Versace, Alexandra Taylor, Francesco Brigo, Wolfgang Nothdurfter, Leopold Saltuari, Eugen Trinka, Raffaele Nardone
Hemispherectomy (HS) is an effective surgical procedure aimed at managing otherwise intractable epilepsy in cases of diffuse unihemispheric pathologies. Neurological recovery in subjects treated with HS is not limited to seizure reduction, rather, sensory-motor and behavioral improvement is often observed. This outcome highlights the considerable capability of the brain to react to such an extensive lesion, by functionally reorganizing and rewiring the cerebral cortex, especially early in life. In this narrative review, we summarize the animal studies as well as the human neurophysiological and neuroimaging studies dealing with the reorganizational processes that occur after HS...
April 13, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28408626/differences-in-activation-and-deactivation-in-children-with-sickle-cell-disease-compared-with-demographically-matched-controls
#15
B Sun, R C Brown, T G Burns, D Murdaugh, S Palasis, R A Jones
BACKGROUND AND PURPOSE: Declines in both functional activation and functional connectivity have been reported in patients with sickle cell disease. In this study, we derived the functional and default mode responses to a word stem paradigm in age-, ethnicity-, and background-matched subjects with sickle cell disease and control groups, with the aim of testing whether both networks were similarly attenuated and whether the changes were related to physiologic parameters that characterize sickle cell disease...
April 13, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28408414/posterior-parietal-cortex-guides-visual-decisions-in-rats
#16
Angela M Licata, Matthew T Kaufman, David Raposo, Michael B Ryan, John P Sheppard, Anne K Churchland
Neurons in putative decision-making structures can reflect both sensory and decision signals, making their causal role in decisions unclear. Here, we tested whether rat posterior parietal cortex (PPC) is causal for processing visual sensory signals or instead for accumulating evidence for decision alternatives. We optogenetically disrupted PPC activity during decision-making and compared effects on decisions guided by auditory vs. visual evidence. Deficits were largely restricted to visual decisions. To further test for visual dominance in PPC, we evaluated electrophysiological responses following individual sensory events and observed much larger response modulation following visual stimuli than auditory stimuli...
April 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28407635/role-of-the-ubiquitin-c-terminal-hydrolase-l1-modulated-ubiquitin-proteasome-system-in-auditory-cortex-senescence
#17
Ya Zhang, Xiang Huang, Xue-Yan Zhao, Yu-Juan Hu, Hai-Ying Sun, Wei-Jia Kong
BACKGROUND/AIMS: According to recent studies, central auditory impairments are closely related to neurodegenerative diseases. However, the mechanism of central presbycusis remains unclear. Ubiquitin C-terminal hydrolase L1 (UCHL1) is important in maintaining proteasomal activity; however, the detailed mechanism has not yet been fully elucidated. This study aims to investigate the molecular alterations involved in UCHL1 regulation during auditory cortex aging. METHODS: D-Galactose (D-gal) induces oxidative stress and senescence in the auditory cortex, as reported in our previous studies...
April 14, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28403175/altered-cortical-and-subcortical-connectivity-due-to-infrasound-administered-near-the-hearing-threshold-evidence-from-fmri
#18
Markus Weichenberger, Martin Bauer, Robert Kühler, Johannes Hensel, Caroline Garcia Forlim, Albrecht Ihlenfeld, Bernd Ittermann, Jürgen Gallinat, Christian Koch, Simone Kühn
In the present study, the brain's response towards near- and supra-threshold infrasound (IS) stimulation (sound frequency < 20 Hz) was investigated under resting-state fMRI conditions. The study involved two consecutive sessions. In the first session, 14 healthy participants underwent a hearing threshold-as well as a categorical loudness scaling measurement in which the individual loudness perception for IS was assessed across different sound pressure levels (SPL). In the second session, these participants underwent three resting-state acquisitions, one without auditory stimulation (no-tone), one with a monaurally presented 12-Hz IS tone (near-threshold) and one with a similar tone above the individual hearing threshold corresponding to a 'medium loud' hearing sensation (supra-threshold)...
2017: PloS One
https://www.readbyqxmd.com/read/28400717/listening-to-rhythmic-music-reduces-connectivity-within-the-basal-ganglia-and-the-reward-system
#19
Hans P Brodal, Berge Osnes, Karsten Specht
Music can trigger emotional responses in a more direct way than any other stimulus. In particular, music-evoked pleasure involves brain networks that are part of the reward system. Furthermore, rhythmic music stimulates the basal ganglia and may trigger involuntary movements to the beat. In the present study, we created a continuously playing rhythmic, dance floor-like composition where the ambient noise from the MR scanner was incorporated as an additional instrument of rhythm. By treating this continuous stimulation paradigm as a variant of resting-state, the data was analyzed with stochastic dynamic causal modeling (sDCM), which was used for exploring functional dependencies and interactions between core areas of auditory perception, rhythm processing, and reward processing...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28400328/you-talkin-to-me-communicative-talker-gaze-activates-left-lateralized-superior-temporal-cortex-during-perception-of-degraded-speech
#20
Carolyn McGettigan, Kyle Jasmin, Frank Eisner, Zarinah K Agnew, Oliver J Josephs, Andrew J Calder, Rosemary Jessop, Rebecca P Lawson, Mona Spielmann, Sophie K Scott
Neuroimaging studies of speech perception have consistently indicated a left-hemisphere dominance in the temporal lobes' responses to intelligible auditory speech signals (McGettigan and Scott, 2012). However, there are important communicative cues that cannot be extracted from auditory signals alone, including the direction of the talker's gaze. Previous work has implicated the superior temporal cortices in processing gaze direction, with evidence for predominantly right-lateralized responses (Carlin & Calder, 2013)...
April 8, 2017: Neuropsychologia
keyword
keyword
47251
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"