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salience network, brain region, fMRI

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https://www.readbyqxmd.com/read/29673322/the-spatio-temporal-dynamics-of-deviance-and-target-detection-in-the-passive-and-active-auditory-oddball-paradigm-a-sloreta-study
#1
Christoph Justen, Cornelia Herbert
BACKGROUND: Numerous studies have investigated the neural underpinnings of passive and active deviance and target detection in the well-known auditory oddball paradigm by means of event-related potentials (ERPs) or functional magnetic resonance imaging (fMRI). The present auditory oddball study investigates the spatio-temporal dynamics of passive versus active deviance and target detection by analyzing amplitude modulations of early and late ERPs while at the same time exploring the neural sources underling this modulation with standardized low-resolution brain electromagnetic tomography (sLORETA) ...
April 19, 2018: BMC Neuroscience
https://www.readbyqxmd.com/read/29593582/acute-effects-of-glucose-and-fructose-administration-on-the-neural-correlates-of-cognitive-functioning-in-healthy-subjects-a-pilot-study
#2
Davide Zanchi, Anne Christin Meyer-Gerspach, André Schmidt, Claudia Suenderhauf, Antoinette Depoorter, Jürgen Drewe, Christoph Beglinger, Bettina Karin Wölnerhanssen, Stefan Borgwardt
The present randomized double-blinded cross-over study aims to extensively study the neural correlates underpinning cognitive functions in healthy subjects after acute glucose and fructose administration, using an integrative multimodal neuroimaging approach. Five minutes after glucose, fructose, or placebo administration through a nasogastric tube, 12 participants underwent 3 complementary neuroimaging techniques: 2 task-based functional magnetic resonance imaging (fMRI) sequences to assess working memory (N-back) and response inhibition (Go/No-Go) and one resting state fMRI sequence to address the cognition-related fronto-parietal network (FPN) and salience network (SN)...
2018: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29581420/aberrant-salience-network-functional-connectivity-in-auditory-verbal-hallucinations-a-first-episode-psychosis-sample
#3
Pavan Kumar Mallikarjun, Paris Alexandros Lalousis, Thomas Frederick Dunne, Kareen Heinze, Renate Lep Reniers, Matthew R Broome, Baldeep Farmah, Femi Oyebode, Stephen J Wood, Rachel Upthegrove
Auditory verbal hallucinations (AVH) often lead to distress and functional disability, and are frequently associated with psychotic illness. Previously both state and trait magnetic resonance imaging (MRI) studies of AVH have identified activity in brain regions involving auditory processing, language, memory and areas of default mode network (DMN) and salience network (SN). Current evidence is clouded by research mainly in participants on long-term medication, with chronic illness and by choice of seed regions made 'a priori'...
March 27, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29572771/brain-functional-connectivity-correlates-of-coping-styles
#4
Emiliano Santarnecchi, Giulia Sprugnoli, Elisa Tatti, Lucia Mencarelli, Francesco Neri, Davide Momi, Giorgio Di Lorenzo, Alvaro Pascual-Leone, Simone Rossi, Alessandro Rossi
Coping abilities represent the individual set of mental and behavioral strategies adopted when facing stress or traumatic experiences. Coping styles related to avoidance have been linked to a disposition to develop psychiatric disorders such as PTSD, anxiety, and major depression, whereas problem-oriented coping skills have been positively correlated with well-being and high quality of life. Even though coping styles constitute an important determinant of resilience and can impact many aspects of everyday living, no study has investigated their brain functional connectivity underpinnings in humans...
March 23, 2018: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/29568689/both-activated-and-less-activated-regions-identified-by-functional-mri-reconfigure-to-support-task-executions
#5
Nianming Zuo, Zhengyi Yang, Yong Liu, Jin Li, Tianzi Jiang
Introduction: Functional magnetic resonance imaging (fMRI) has become very important for noninvasively characterizing BOLD signal fluctuations, which reflect the changes in neuronal firings in the brain. Unlike the activation detection strategy utilized with fMRI, which only emphasizes the synchronicity between the functional nodes (activated regions) and the task design, brain connectivity and network theory are able to decipher the interactive structure across the entire brain. However, little is known about whether and how the activated/less-activated interactions are associated with the functional changes that occur when the brain changes from the resting state to a task state...
January 2018: Brain and Behavior
https://www.readbyqxmd.com/read/29535614/large-scale-brain-networks-supporting-divided-attention-across-spatial-locations-and-sensory-modalities
#6
Valerio Santangelo
Higher-order cognitive processes were shown to rely on the interplay between large-scale neural networks. However, brain networks involved with the capability to split attentional resource over multiple spatial locations and multiple stimuli or sensory modalities have been largely unexplored to date. Here I re-analyzed data from Santangelo et al. (2010) to explore the causal interactions between large-scale brain networks during divided attention. During fMRI scanning, participants monitored streams of visual and/or auditory stimuli in one or two spatial locations for detection of occasional targets...
2018: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/29527476/connectome-wide-investigation-of-altered-resting-state-functional-connectivity-in-war-veterans-with-and-without-posttraumatic-stress-disorder
#7
Masaya Misaki, Raquel Phillips, Vadim Zotev, Chung-Ki Wong, Brent E Wurfel, Frank Krueger, Matthew Feldner, Jerzy Bodurka
Altered resting-state functional connectivity in posttraumatic stress disorder (PTSD) suggests neuropathology of the disorder. While seed-based fMRI connectivity analysis is often used for the studies, such analysis requires defining a seed location a priori , which restricts search scope and could bias findings toward presupposed areas. Recently, a comprehensive exploratory voxel-wise connectivity analysis, the connectome-wide association approach, has been introduced using multivariate distance matrix regression (MDMR) for resting-state functional connectivity analysis...
2018: NeuroImage: Clinical
https://www.readbyqxmd.com/read/29498761/aberrant-functional-network-connectivity-in-psychopathy-from-a-large-n-985-forensic-sample
#8
Flor A Espinoza, Victor M Vergara, Daisy Reyes, Nathaniel E Anderson, Carla L Harenski, Jean Decety, Srinivas Rachakonda, Eswar Damaraju, Barnaly Rashid, Robyn L Miller, Michael Koenigs, David S Kosson, Keith Harenski, Kent A Kiehl, Vince D Calhoun
Psychopathy is a personality disorder characterized by antisocial behavior, lack of remorse and empathy, and impaired decision making. The disproportionate amount of crime committed by psychopaths has severe emotional and economic impacts on society. Here we examine the neural correlates associated with psychopathy to improve early assessment and perhaps inform treatments for this condition. Previous resting-state functional magnetic resonance imaging (fMRI) studies in psychopathy have primarily focused on regions of interest...
March 2, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29497705/amygdala-adaptation-and-temporal-dynamics-of-the-salience-network-in-conditioned-fear-a-single-trial-fmri-study
#9
Siyang Yin, Yuelu Liu, Nathan M Petro, Andreas Keil, Mingzhou Ding
Research in rodents has established the role of the amygdaloid complex in defensive responses to conditioned threat. In human imaging studies, however, activation of the amygdala by conditioned threat cues is often not observed. One hypothesis states that this finding reflects adaptation of amygdaloid responses over time. We tested this hypothesis by estimating single-trial neural responses over a large number of conditioning trials. Functional MRI (fMRI) was recorded from 18 participants during classical differential fear conditioning: Participants viewed oriented grayscale grating stimuli (45° or 135°) presented centrally in random order...
January 2018: ENeuro
https://www.readbyqxmd.com/read/29488069/decoding-auditory-saliency-from-brain-activity-patterns-during-free-listening-to-naturalistic-audio-excerpts
#10
Shijie Zhao, Junwei Han, Xi Jiang, Heng Huang, Huan Liu, Jinglei Lv, Lei Guo, Tianming Liu
In recent years, natural stimuli such as audio excerpts or video streams have received increasing attention in neuroimaging studies. Compared with conventional simple, idealized and repeated artificial stimuli, natural stimuli contain more unrepeated, dynamic and complex information that are more close to real-life. However, there is no direct correspondence between the stimuli and any sensory or cognitive functions of the brain, which makes it difficult to apply traditional hypothesis-driven analysis methods (e...
February 27, 2018: Neuroinformatics
https://www.readbyqxmd.com/read/29475059/ventro-lateral-motor-thalamus-abnormal-connectivity-in-essential-tremor-before-and-after-thalamotomy-a-resting-state-fmri-study
#11
Constantin Tuleasca, Elena Najdenovska, Jean Régis, Tatiana Witjas, Nadine Girard, Jérôme Champoudry, Mohamed Faouzi, Jean-Philippe Thiran, Meritxell Bach Cuadra, Marc Levivier, Dimitri Van De Ville
OBJECTIVE: To evaluate functional connectivity (FC) of the ventro-lateral thalamus, a common target for drug-resistant essential tremor (ET), resting-state data were analyzed before and 1 year after stereotactic radiosurgical thalamotomy (SRS-T), and compared against healthy controls (HC). METHODS: 17 consecutive patients and 10 HC were enrolled. Tremor network was investigated using ventro-lateral ventral (VLV) nucleus as region-of-interest (ROI), extracted using automated segmentation from pretherapeutic diffusion MRI...
February 20, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29436054/sensorimotor-network-alterations-in-children-and-youth-with-prenatal-alcohol-exposure
#12
Xiangyu Long, Graham Little, Christian Beaulieu, Catherine Lebel
Children with prenatal alcohol exposure (PAE) often have impaired sensorimotor function. While altered brain structure has been noted in sensorimotor areas, the functional brain alterations remain unclear. This study aims to investigate sensorimotor brain networks in children and youth with PAE using resting-state functional magnetic resonance imaging (rs-fMRI). A parcellation-based network analysis was performed to identify brain networks related to hand/lower limb and face/upper limb function in 59 children and youth with PAE and 50 typically developing controls...
February 12, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29410103/frontoparietal-areas-link-impairments-of-large-scale-intrinsic-brain-networks-with-aberrant-fronto-striatal-interactions-in-ocd-a-meta-analysis-of-resting-state-functional-connectivity
#13
REVIEW
Deniz A Gürsel, Mihai Avram, Christian Sorg, Felix Brandl, Kathrin Koch
Neuroimaging studies report evidence for two distinct pathophysiological models of obsessive-compulsive disorder (OCD): disrupted fronto-striatal circuits and impaired large-scale fronto-parietal-limbic intrinsic brain networks, defined by functionally connected (FC) infra-slow oscillations in ongoing brain activity. To synthesize this literature and overcome inconsistencies, we conducted a coordinate-based meta-analysis of 18 whole-brain resting-state functional magnetic resonance imaging (fMRI) studies (541 patients, 572 healthy controls) comparing seed-based FC between OCD patients and healthy controls...
February 3, 2018: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29391243/incentives-facilitate-developmental-improvement-in-inhibitory-control-by-modulating-control-related-networks
#14
Michael N Hallquist, Charles F Geier, Beatriz Luna
Adolescence is a period of heightened sensitivity to incentives and relatively weak cognitive control, which may contribute to risky behaviors. Studies of brain activity have generally identified greater activation of the ventral striatum to rewards and less activation of prefrontal regions during control tasks in adolescents compared to adults. Little is known, however, about age-related changes in the functional brain networks underlying incentive processing and cognitive control. This cross-sectional study characterized the effects of incentives on inhibitory control during an oculomotor task using whole-brain functional connectivity analyses...
January 29, 2018: NeuroImage
https://www.readbyqxmd.com/read/29339474/robust-prediction-of-individual-creative-ability-from-brain-functional-connectivity
#15
Roger E Beaty, Yoed N Kenett, Alexander P Christensen, Monica D Rosenberg, Mathias Benedek, Qunlin Chen, Andreas Fink, Jiang Qiu, Thomas R Kwapil, Michael J Kane, Paul J Silvia
People's ability to think creatively is a primary means of technological and cultural progress, yet the neural architecture of the highly creative brain remains largely undefined. Here, we employed a recently developed method in functional brain imaging analysis-connectome-based predictive modeling-to identify a brain network associated with high-creative ability, using functional magnetic resonance imaging (fMRI) data acquired from 163 participants engaged in a classic divergent thinking task. At the behavioral level, we found a strong correlation between creative thinking ability and self-reported creative behavior and accomplishment in the arts and sciences ( r = 0...
January 30, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29300840/reconfiguration-of-cortical-networks-in-mdd-uncovered-by-multiscale-community-detection-with-fmri
#16
Ye He, Sol Lim, Santo Fortunato, Olaf Sporns, Lei Zhang, Jiang Qiu, Peng Xie, Xi-Nian Zuo
Major depressive disorder (MDD) is known to be associated with altered interactions between distributed brain regions. How these regional changes relate to the reorganization of cortical functional systems, and their modulation by antidepressant medication, is relatively unexplored. To identify changes in the community structure of cortical functional networks in MDD, we performed a multiscale community detection algorithm on resting-state functional connectivity networks of unmedicated MDD (uMDD) patients (n = 46), medicated MDD (mMDD) patients (n = 38), and healthy controls (n = 50), which yielded a spectrum of multiscale community partitions...
April 1, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29299380/higher-extrinsic-and-lower-intrinsic-connectivity-in-resting-state-networks-for-professional-baduk-go-players
#17
William S Sohn, Tae Young Lee, Seoyeon Kwak, Youngwoo Bryan Yoon, Jun Soo Kwon
Introduction: Dedication and training to a profession results in a certain level of expertise. This expertise, like any other skill obtained in our lifetime, is encoded in the brain and may be reflected in our brain's connectome. This property can be observed by mapping resting state connectivity. In this study, we examine the differences in resting state functional connectivity in four major networks between professional "Baduk" (Go) players and normal subjects. Methods: Resting state fMRI scans were acquired for professional "Baduk" (Go) players and normal controls...
December 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29259022/intersubject-synchronisation-analysis-of-brain-activity-associated-with-the-instant-effects-of-acupuncture-an-fmri-study
#18
Lingmin Jin, Jinbo Sun, Ziliang Xu, Xuejuan Yang, Peng Liu, Wei Qin
OBJECTIVE: To use a promising analytical method, namely intersubject synchronisation (ISS), to evaluate the brain activity associated with the instant effects of acupuncture and compare the findings with traditional general linear model (GLM) methods. METHODS: 30 healthy volunteers were recruited for this study. Block-designed manual acupuncture stimuli were delivered at SP6, and de qi sensations were measured after acupuncture stimulation. All subjects underwent functional MRI (fMRI) scanning during the acupuncture stimuli...
February 2018: Acupuncture in Medicine: Journal of the British Medical Acupuncture Society
https://www.readbyqxmd.com/read/29217684/retrieval-demands-adaptively-change-striatal-old-new-signals-and-boost-subsequent-long-term-memory
#19
Nora A Herweg, Tobias Sommer, Nico Bunzeck
The striatum is a central part of the dopaminergic mesolimbic system and contributes both to the encoding and retrieval of long-term memories. In this regard, the co-occurrence of striatal novelty and retrieval success effects in independent studies underlines the structure's double duty and suggests dynamic contextual adaptation. To test this hypothesis and further investigate the underlying mechanisms of encoding and retrieval dynamics, human subjects viewed pre-familiarized scene images intermixed with new scenes and classified them as indoor versus outdoor (encoding task) or old versus new (retrieval task), while fMRI and eye tracking data were recorded...
January 17, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29175032/convergent-and-divergent-functional-connectivity-patterns-in-patients-with-long-term-left-sided-and-right-sided-deafness
#20
Yanyang Zhang, Zhiqi Mao, Shiyu Feng, Wenxin Wang, Jun Zhang, Xinguang Yu
Cortical reorganization may be induced in long-term single-sided deafness (SD); however, the influence of the deafness side on the functional changes remains poorly understood. Here, we investigated whole-brain functional connectivity patterns in long-term SD patients. The normalized voxel-based functional connectivity strength (FCS) was determined using resting-state fMRI (rs-fMRI) in 17 left-sided deafness (LD) patients, 21 right-sided deafness (RD) patients and 21 healthy controls (HCs). Relative to the HCs, both the LD and RD patients exhibited a reduction in the FCS in the ipsilateral visual cortex...
February 5, 2018: Neuroscience Letters
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