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salience network, brain region, fMRI

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https://www.readbyqxmd.com/read/28267626/bayesian-switching-factor-analysis-for-estimating-time-varying-functional-connectivity-in-fmri
#1
Jalil Taghia, Srikanth Ryali, Tianwen Chen, Kaustubh Supekar, Weidong Cai, Vinod Menon
There is growing interest in understanding the dynamical properties of functional interactions between distributed brain regions. However, robust estimation of temporal dynamics from functional magnetic resonance imaging (fMRI) data remains challenging due to limitations in extant multivariate methods for modeling time-varying functional interactions between multiple brain areas. Here, we develop a Bayesian generative model for fMRI time-series within the framework of hidden Markov models (HMMs). The model is a dynamic variant of the static factor analysis model (Ghahramani and Beal, 2000)...
March 3, 2017: NeuroImage
https://www.readbyqxmd.com/read/28245927/motion-sickness-increases-functional-connectivity-between-visual-motion-and-nausea-associated-brain-regions
#2
Nicola Toschi, Jieun Kim, Roberta Sclocco, Andrea Duggento, Riccardo Barbieri, Braden Kuo, Vitaly Napadow
The brain networks supporting nausea not yet understood. We previously found that while visual stimulation activated primary (V1) and extrastriate visual cortices (MT+/V5, coding for visual motion), increasing nausea was associated with increasing sustained activation in several brain areas, with significant co-activation for anterior insula (aIns) and mid-cingulate (MCC) cortices. Here, we hypothesized that motion sickness also alters functional connectivity between visual motion and previously identified nausea-processing brain regions...
January 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28223812/resting-state-functional-connectivity-changes-within-the-default-mode-network-and-the-salience-network-after-antipsychotic-treatment-in-early-phase-schizophrenia
#3
Yingchan Wang, Weijun Tang, Xiaoduo Fan, Jianye Zhang, Daoying Geng, Kaida Jiang, Dianming Zhu, Zhenhua Song, Zeping Xiao, Dengtang Liu
OBJECTIVE: Abnormal resting-state functional connectivity (FC), particularly in the default mode network (DMN) and the salience network (SN), has been reported in schizophrenia, but little is known about the effects of antipsychotics on these networks. The purpose of this study was to examine the effects of atypical antipsychotics on DMN and SN and the relationship between these effects and symptom improvement in patients with schizophrenia. METHODS: This was a prospective study of 33 patients diagnosed with schizophrenia and treated with antipsychotics at Shanghai Mental Health Center...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28176434/network-level-assessment-of-reward-related-activation-in-patients-with-adhd-and-healthy-individuals
#4
Daniel von Rhein, Christian F Beckmann, Barbara Franke, Jaap Oosterlaan, Dirk J Heslenfeld, Pieter J Hoekstra, Catharina A Hartman, Marjolein Luman, Stephen V Faraone, Roshan Cools, Jan K Buitelaar, Maarten Mennes
INTRODUCTION: Reward processing is a key aspect of cognitive control processes, putatively instantiated by mesolimbic and mesocortical brain circuits. Deficient signaling within these circuits has been associated with psychopathology. We applied a network discovery approach to assess specific functional networks associated with reward processing in participants with attention-deficit/hyperactivity disorder (ADHD). METHODS: To describe task-related processes in terms of integrated functional networks, we applied independent component analysis (ICA) to task response maps of 60 healthy participants who performed a monetary incentive delay (MID) task...
February 8, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28162895/the-brain-basis-for-misophonia
#5
Sukhbinder Kumar, Olana Tansley-Hancock, William Sedley, Joel S Winston, Martina F Callaghan, Micah Allen, Thomas E Cope, Phillip E Gander, Doris-Eva Bamiou, Timothy D Griffiths
Misophonia is an affective sound-processing disorder characterized by the experience of strong negative emotions (anger and anxiety) in response to everyday sounds, such as those generated by other people eating, drinking, chewing, and breathing [1-8]. The commonplace nature of these sounds (often referred to as "trigger sounds") makes misophonia a devastating disorder for sufferers and their families, and yet nothing is known about the underlying mechanism. Using functional and structural MRI coupled with physiological measurements, we demonstrate that misophonic subjects show specific trigger-sound-related responses in brain and body...
February 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28160660/altered-default-mode-fronto-parietal-and-salience-networks-in-adolescents-with-internet-addiction
#6
Lubin Wang, Hui Shen, Yu Lei, Ling-Li Zeng, Fenglin Cao, Linyan Su, Zheng Yang, Shuqiao Yao, Dewen Hu
Internet addiction (IA) is a condition characterized by loss of control over Internet use, leading to a variety of negative psychosocial consequences. Recent neuroimaging studies have begun to identify IA-related changes in specific brain regions and connections. However, whether and how the interactions within and between the large-scale brain networks are disrupted in individuals with IA remain largely unexplored. Using group independent component analysis, we extracted five intrinsic connectivity networks (ICNs) from the resting-state fMRI data of 26 adolescents with IA and 43 controls, including the anterior and posterior default mode network (DMN), left and right fronto-parietal network (FPN), and salience network (SN)...
January 15, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28116239/characterization-of-functional-brain-activity-and-connectivity-using-eeg-and-fmri-in-patients-with-sickle-cell-disease
#7
Michelle Case, Huishi Zhang, John Mundahl, Yvonne Datta, Stephen Nelson, Kalpna Gupta, Bin He
Sickle cell disease (SCD) is a red blood cell disorder that causes many complications including life-long pain. Treatment of pain remains challenging due to a poor understanding of the mechanisms and limitations to characterize and quantify pain. In the present study, we examined simultaneously recording functional MRI (fMRI) and electroencephalogram (EEG) to better understand neural connectivity as a consequence of chronic pain in SCD patients. We performed independent component analysis and seed-based connectivity on fMRI data...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28069540/multi-modal-analysis-of-functional-connectivity-and-cerebral-blood-flow-reveals-shared-and-unique-effects-of-propofol-in-large-scale-brain-networks
#8
Maolin Qiu, Dustin Scheinost, Ramachandran Ramani, R Todd Constable
Anesthesia-induced changes in functional connectivity and cerebral blow flow (CBF) in large-scale brain networks have emerged as key markers of reduced consciousness. However, studies of functional connectivity disagree on which large-scale networks are altered or preserved during anesthesia, making it difficult to find a consensus amount studies. Additionally, pharmacological alterations in CBF could amplify or occlude changes in connectivity due to the shared variance between CBF and connectivity. Here, we used data-driven connectivity methods and multi-modal imaging to investigate shared and unique neural correlates of reduced consciousness for connectivity in large-scale brain networks...
January 6, 2017: NeuroImage
https://www.readbyqxmd.com/read/28044431/abnormal-resting-state-neural-activity-and-connectivity-of-fatigue-in-parkinson-s-disease
#9
Jie-Jin Zhang, Jian Ding, Jun-Yi Li, Min Wang, Yong-Sheng Yuan, Li Zhang, Si-Ming Jiang, Xi-Xi Wang, Lin Zhu, Ke-Zhong Zhang
AIMS: Fatigue is a common burdensome problem in patients with Parkinson's disease (PD), but its pathophysiological mechanisms are poorly understood. This study aimed at investigating the neural substrates of fatigue in patients with PD. METHODS: A total of 17 PD patients with fatigue, 32 PD patients without fatigue, and 25 matched healthy controls were recruited. The 9-item fatigue severity scale (FSS) was used for fatigue screening and severity rating. Resting-state functional magnetic resonance imaging (RS-fMRI) data were obtained from all subjects...
January 3, 2017: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/28038366/brain-networks-underlying-novel-metaphor-production
#10
Roger E Beaty, Paul J Silvia, Mathias Benedek
Metaphors are widely used to convey abstract concepts and emotions in the arts and everyday life. Neuroimaging research suggests that dynamic interactions among large-scale brain networks, including the default and executive control networks, support the production of such creative ideas. However, the extent to which these networks interact to support other forms of creative language production such as metaphor remains unknown. Using functional magnetic resonance imaging (fMRI), we explored this question by assessing functional interactions between brain regions during novel metaphor production...
February 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28017880/aberrant-spontaneous-low-frequency-brain-activity-in-amnestic-mild-cognitive-impairment-a-meta-analysis-of-resting-state-fmri-studies
#11
REVIEW
PingLei Pan, Lin Zhu, TingTing Yu, HaiCun Shi, Bing Zhang, Ruomeng Qin, Xiaolei Zhu, Lai Qian, Hui Zhao, Hong Zhou, Yun Xu
Recent resting-state functional magnetic resonance imaging (rs-fMRI) studies have provided strong evidence of abnormal spontaneous brain activity in amnestic mild cognitive impairment (aMCI). However, the conclusions have been inconsistent. A meta-analysis of whole-brain rs-fMRI studies that measured differences in the amplitude of low-frequency fluctuations (ALFF) between aMCI patients and healthy controls was conducted using the Seed-based d Mapping software package. Twelve studies reporting 14 datasets were included in the meta-analysis...
December 23, 2016: Ageing Research Reviews
https://www.readbyqxmd.com/read/27916664/experience-dependent-modulation-of-right-anterior-insula-and-sensorimotor-regions-as-a-function-of-noise-masked-auditory-feedback-in-singers-and-nonsingers
#12
Boris Kleber, Anders Friberg, Anthony Zeitouni, Robert Zatorre
Previous studies on vocal motor production in singing suggest that the right anterior insula (AI) plays a role in experience-dependent modulation of feedback integration. Specifically, when somatosensory input was reduced via anesthesia of the vocal fold mucosa, right AI activity was down regulated in trained singers. In the current fMRI study, we examined how masking of auditory feedback affects pitch-matching accuracy and corresponding brain activity in the same participants. We found that pitch-matching accuracy was unaffected by masking in trained singers yet declined in nonsingers...
February 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/27908591/an-fmri-investigation-of-the-relationship-between-future-imagination-and-cognitive-flexibility
#13
R P Roberts, K Wiebels, R L Sumner, V van Mulukom, C L Grady, D L Schacter, D R Addis
While future imagination is largely considered to be a cognitive process grounded in default mode network activity, studies have shown that future imagination recruits regions in both default mode and frontoparietal control networks. In addition, it has recently been shown that the ability to imagine the future is associated with cognitive flexibility, and that tasks requiring cognitive flexibility result in increased coupling of the default mode network with frontoparietal control and salience networks. In the current study, we investigated the neural correlates underlying the association between cognitive flexibility and future imagination in two ways...
January 27, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/27887704/aberrant-modulation-of-brain-activation-by-emotional-valence-during-self-referential-processing-among-patients-with-delusions-of-reference
#14
Todd A Girard, Louis Lakatos, Mahesh Menon
BACKGROUND AND OBJECTIVES: Delusions of reference are thought to reflect abnormally heightened attributions of salience to mundane events or stimuli that lead to convictions that they are personally significant or directed at the observer. Recent findings highlight abnormal recruitment of brain regions associated with self-referential processes among patients with referential delusions. Given the inherent overlap of emotion, incentive salience, and self-relevance, as well as with aberrant thought processes in psychosis, this study investigated the implicit relations between participants' perception of the emotional valence of stimuli on neural correlates of self-referent judgments among schizophrenia-spectrum patients with referential delusions...
November 17, 2016: Journal of Behavior Therapy and Experimental Psychiatry
https://www.readbyqxmd.com/read/27859936/mortality-salience-reduces-the-discrimination-between-in-group-and-out-group-interactions-a-functional-mri-investigation-using-multi-voxel-pattern-analysis
#15
Chunliang Feng, Bobby Azarian, Yina Ma, Xue Feng, Lili Wang, Yue-Jia Luo, Frank Krueger
As a fundamental concern of human beings, mortality salience impacts various human social behaviors including intergroup interactions; however, the underlying neural signature remains obscure. Here, we examined the neural signatures underlying the impact of mortality reminders on in-group bias in costly punishment combining a second-party punishment task with multivariate pattern analysis of fMRI data. After mortality salience (MS) priming or general negative affect priming, participants received offers from racial in-group and out-group proposers and decided how to punish proposers by reducing their payoffs...
November 10, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27834117/reward-salience-and-attentional-networks-are-activated-by-religious-experience-in-devout-mormons
#16
Michael A Ferguson, Jared A Nielsen, Jace B King, Li Dai, Danielle M Giangrasso, Rachel Holman, Julie R Korenberg, Jeffrey S Anderson
High-level cognitive and emotional experience arises from brain activity, but the specific brain substrates for religious and spiritual euphoria remain unclear. We demonstrate using functional magnetic resonance imaging scans in 19 devout Mormons that a recognizable feeling central to their devotional practice was reproducibly associated with activation in nucleus accumbens, ventromedial prefrontal cortex, and frontal attentional regions. Nucleus accumbens activation preceded peak spiritual feelings by 1-3 s and was replicated in four separate tasks...
November 29, 2016: Social Neuroscience
https://www.readbyqxmd.com/read/27818941/functional-connectivity-in-cortico-subcortical-brain-networks-underlying-reward-processing-in-attention-deficit-hyperactivity-disorder
#17
Marianne Oldehinkel, Christian F Beckmann, Barbara Franke, Catharina A Hartman, Pieter J Hoekstra, Jaap Oosterlaan, Dirk Heslenfeld, Jan K Buitelaar, Maarten Mennes
BACKGROUND: Many patients with attention-deficit/hyperactivity disorder (ADHD) display aberrant reward-related behavior. Task-based fMRI studies have related atypical reward processing in ADHD to altered BOLD activity in regions underlying reward processing such as ventral striatum and orbitofrontal cortex. However, it remains unclear whether the observed effects are region-specific or related to changes in functional connectivity of networks supporting reward processing. Here we use resting-state fMRI to comprehensively delineate the functional connectivity architecture underlying aberrant reward processing in ADHD...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27662284/a-longitudinal-study-on-resting-state-functional-connectivity-in-behavioral-variant-frontotemporal-dementia-and-alzheimer-s-disease
#18
Anne Hafkemeijer, Christiane Möller, Elise G P Dopper, Lize C Jiskoot, Annette A van den Berg-Huysmans, John C van Swieten, Wiesje M van der Flier, Hugo Vrenken, Yolande A L Pijnenburg, Frederik Barkhof, Philip Scheltens, Jeroen van der Grond, Serge A R B Rombouts
BACKGROUND/OBJECTIVE: Alzheimer's disease (AD) and behavioral variant frontotemporal dementia (bvFTD) are the most common types of early-onset dementia. We applied longitudinal resting state functional magnetic resonance imaging (fMRI) to delineate functional brain connections relevant for disease progression and diagnostic accuracy. METHODS: We used two-center resting state fMRI data of 20 AD patients (65.1±8.0 years), 12 bvFTD patients (64.7±5.4 years), and 22 control subjects (63...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27627760/default-mode-and-executive-networks-areas-association-with-the-serial-order-in-divergent-thinking
#19
Jarmo Heinonen, Jussi Numminen, Yevhen Hlushchuk, Henrik Antell, Vesa Taatila, Jyrki Suomala
Scientific findings have suggested a two-fold structure of the cognitive process. By using the heuristic thinking mode, people automatically process information that tends to be invariant across days, whereas by using the explicit thinking mode people explicitly process information that tends to be variant compared to typical previously learned information patterns. Previous studies on creativity found an association between creativity and the brain regions in the prefrontal cortex, the anterior cingulate cortex, the default mode network and the executive network...
2016: PloS One
https://www.readbyqxmd.com/read/27592812/dynamic-changes-of-resting-state-connectivity-related-to-the-acquisition-of-a-lexico-semantic-skill
#20
L Schlaffke, L Schweizer, N N Rüther, R Luerding, M Tegenthoff, C Bellebaum, T Schmidt-Wilcke
The brain undergoes adaptive changes during learning. Spontaneous neural activity has been proposed to play an important role in acquiring new information and/or improve the interaction of task related brain regions. A promising approach is the investigation of resting state functional connectivity (rs-fc) and resting state networks, which rely on the detection of interregional correlations of spontaneous BOLD fluctuations. Using Morse Code (MC) as a model to investigate neural correlates of lexico-semantic learning we sought to identify patterns in rs-fc that predict learning success and/or undergo dynamic changes during a 10-day training period...
February 1, 2017: NeuroImage
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