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Salience network, functional connectivity, fMRI

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https://www.readbyqxmd.com/read/28924621/an-altered-scaffold-for-information-processing-cognitive-control-development-in-adolescents-with-autism
#1
Marjorie Solomon, Jeremy Hogeveen, Lauren Libero, Christine Nordahl
We investigated how cognitive neuroscientific studies during the last decade have advanced understanding of cognitive control from adolescence to young adulthood in individuals with autism spectrum disorder (ASD). To do so, we conducted a selective review of the larger structural, resting state, and diffusion imaging studies of brain regions and networks related to cognitive control that have been conducted since 2007 in individuals with ASD and typical development (TYP) ages 10 to 30 years that examined how these regions and networks support behavioral and task-based fMRI performance on tasks assessing cognitive control during this period...
September 2017: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/28923408/altered-functional-connectivity-in-mesial-temporal-lobe-epilepsy
#2
Hana Burianová, Nahla L Faizo, Marcus Gray, Julia Hocking, Graham Galloway, David Reutens
Growing evidence of altered functional connectivity suggests that mesial temporal lobe epilepsy (mTLE) alters not only hippocampal networks, but also a number of resting state networks. These highly coherent, yet functionally distinct brain circuits interact dynamically with each other in order to mediate consciousness, memory, and attention. However, little is currently known about the modulation of these networks by epileptiform activity, such as interictal spikes and seizures. The objective of the study was to use simultaneous EEG-fMRI to investigate functional connectivity in three resting state networks: default mode network (DMN), salience network (SN), and dorsal attentional network (DAN) in patients with mTLE compared to a healthy cohort, and in relation to the onset of interictal spikes and the period immediately prior to the spikes...
September 8, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28893929/distinct-patterns-of-temporal-and-directional-connectivity-among-intrinsic-networks-in-the-human-brain
#3
James M Shine, Aaron Kucyi, Brett L Foster, Stephan Bickel, Danhong Wang, Hesheng Liu, Russell A Poldrack, Liang-Tien Hsieh, Jen Chun Hsiang, Josef Parvizi
To determine the spatiotemporal relationships among intrinsic networks of the human brain, we recruited seven neurosurgical patients (4 males; 3 females) who were implanted with intracranial depth electrodes. We first identified canonical resting state networks at the individual subject level using an iterative matching procedure on each subject's resting state fMRI data. We then introduced single electrical pulses to fMRI pre-identified nodes of the default (DN), frontoparietal (FPN) and salience networks (SN) while recording evoked responses in other recording sites within the same networks...
September 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28887198/mindfulness-and-dynamic-functional-neural-connectivity-in-children-and-adolescents
#4
Hilary A Marusak, Farrah Elrahal, Craig A Peters, Prantik Kundu, Michael V Lombardo, Vince D Calhoun, Elimelech K Goldberg, Cindy Cohen, Jeffrey W Taub, Christine A Rabinak
BACKGROUND: Interventions that promote mindfulness consistently show salutary effects on cognition and emotional wellbeing in adults, and more recently, in children and adolescents. However, we lack understanding of the neurobiological mechanisms underlying mindfulness in youth that should allow for more judicious application of these interventions in clinical and educational settings. METHODS: Using multi-echo multi-band fMRI, we examined dynamic (i.e., time-varying) and conventional static resting-state connectivity between core neurocognitive networks (i...
January 15, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/28882089/the-default-mode-network-as-a-biomarker-of-persistent-complaints-after-mild-traumatic-brain-injury-a-longitudinal-fmri-study
#5
Harm Jan van der Horn, Myrthe Elisabeth Scheenen, Myrthe Elisabeth de Koning, Edith J Liemburg, Jacoba M Spikman, Joukje van der Naalt
The objective of this study was to examine longitudinal functional connectivity of resting-state networks in patients with and without complaints after uncomplicated mild traumatic brain injury (mTBI). Second, we aimed to determine the value of network connectivity in predicting persistent complaints, anxiety, depression and long-term outcome. Thirty mTBI patients with (≥ 3) posttraumatic complaints at two weeks post-injury, 19 without complaints, and 20 matched healthy controls were selected for this study...
September 7, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28861340/multivariate-pattern-analysis-strategies-in-detection-of-remitted-major-depressive-disorder-using-resting-state-functional-connectivity
#6
Runa Bhaumik, Lisanne M Jenkins, Jennifer R Gowins, Rachel H Jacobs, Alyssa Barba, Dulal K Bhaumik, Scott A Langenecker
Understanding abnormal resting-state functional connectivity of distributed brain networks may aid in probing and targeting mechanisms involved in major depressive disorder (MDD). To date, few studies have used resting state functional magnetic resonance imaging (rs-fMRI) to attempt to discriminate individuals with MDD from individuals without MDD, and to our knowledge no investigations have examined a remitted (r) population. In this study, we examined the efficiency of support vector machine (SVM) classifier to successfully discriminate rMDD individuals from healthy controls (HCs) in a narrow early-adult age range...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28836577/oxytocin-modulates-attention-switching-between-interoceptive-signals-and-external-social-cues
#7
Shuxia Yao, Benjamin Becker, Weihua Zhao, Zhiying Zhao, Juan Kou, Xiaole Ma, Yayuan Geng, Peng Ren, Keith M Kendrick
Emotional experience involves an integrated interplay between processing of external emotional cues and interoceptive feedback, and this is impaired in a number of emotional disorders. The neuropeptide oxytocin (OT) enhances the salience of external social cues but its influence on interoception is unknown. The present pharmaco-fMRI study therefore investigated whether OT enhances interoceptive awareness and if it influences the interplay between interoceptive and salience processing. In a randomized, double-blind, between-subject, design study 83 subjects received either intranasal OT or placebo...
August 24, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28830309/aberrant-thalamocortical-connectivity-in-juvenile-myoclonic-epilepsy
#8
S Jiang, C Luo, J Gong, R Peng, S Ma, S Tan, G Ye, L Dong, D Yao
The purpose of this study was to investigate the functional connectivity (FC) of thalamic subdivisions in patients with juvenile myoclonic epilepsy (JME). Resting state functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) data were acquired from 22 JME and 25 healthy controls. We first divided the thalamus into eight subdivisions by performing independent component analysis on tracking fibers and clustering thalamus-related FC maps. We then analyzed abnormal FC in each subdivision in JME compared with healthy controls, and we investigated their associations with clinical features...
June 13, 2017: International Journal of Neural Systems
https://www.readbyqxmd.com/read/28826495/anatomical-and-functional-organization-of-the-human-substantia-nigra-and-its-connections
#9
Yu Zhang, Kevin Michel-Herve Larcher, Bratislav Misic, Alain Dagher
We investigated the anatomical and functional organization of the human substantia nigra (SN) using diffusion and functional MRI data from the Human Connectome Project. We identified a tripartite connectivity-based parcellation of SN with a limbic, cognitive, motor arrangement. The medial SN connects with limbic striatal and cortical regions and encodes value (greater response to monetary wins than losses during fMRI), while the ventral SN connects with associative regions of cortex and striatum and encodes salience (equal response to wins and losses)...
August 21, 2017: ELife
https://www.readbyqxmd.com/read/28819132/treatment-associated-changes-of-functional-connectivity-of-midbrain-brainstem-nuclei-in-major-depressive-disorder
#10
Gerd Wagner, Feliberto de la Cruz, Stefanie Köhler, Karl-Jürgen Bär
Previous functional magnetic resonance imaging (fMRI) studies demonstrated an abnormally coordinated network functioning in Major Depression Disorder (MDD) during rest. The main monoamine-producing nuclei within midbrain/brainstem are functionally integrated within these specific networks. Therefore, we aimed to investigate the resting-state functional connectivity (RSFC) of these nuclei in 45 MDD patients and differences between patients receiving two different classes of antidepressant drugs. Patients showed reduced RSFC from the ventral tegmental area (VTA) to dorsal anterior cingulate cortex (dACC) and stronger RSFC to the left amygdala and dorsolateral prefrontal cortex (DLPFC)...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28806707/deviant-functional-activation-and-connectivity-of-the-right-insula-are-associated-with-lack-of-awareness-of-episodic-memory-impairment-in-nonamnesic-alcoholism
#11
Anne-Pascale Le Berre, Eva M Müller-Oehring, Tilman Schulte, Matthew R Serventi, Adolf Pfefferbaum, Edith V Sullivan
A disorder of metamemory, expressed as unawareness of mnemonic ability, is typically associated with the profound amnesia of Korsakoff's Syndrome (KS). A similar but less severe type of limited awareness can also occur in non-KS alcoholism and is observed as an impairment in generating Feeling-of-Knowing (FOK) predictions about future recognition performance. We previously found that FOK accuracy was selectively related to volumes of the insula in alcoholics involved in the present study. Unknown, however, are the neural substrates of unawareness of memory impairment in alcoholism...
July 25, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28783763/mapping-altered-brain-connectivity-and-its-clinical-associations-in-adult-moyamoya-disease-a-resting-state-functional-mri-study
#12
Ken Kazumata, Khin Khin Tha, Haruto Uchino, Masaki Ito, Naoki Nakayama, Takeo Abumiya
Detection of subtle ischemic injuries in moyamoya disease may enable optimization of timing of revascularization surgery, and could potentially improve functional outcomes. Resting-state functional magnetic resonance imaging (rs-fMRI) is widely used to study functional organization of the brain, but it remains unclear whether rs-fMRI could elucidate distinct characteristics in moyamoya disease. Here, we aimed to determine changes in a conventional rs-fMRI measure and analyze any associations with clinical symptoms and cerebral hemodynamics...
2017: PloS One
https://www.readbyqxmd.com/read/28762756/intranasal-oxytocin-selectively-modulates-large-scale-brain-networks-in-humans
#13
Katja Brodmann, Oliver Gruber, Roberto Goya-Maldonado
A growing body of evidence indicates that the neuropeptide oxytocin (OT) alters the neural correlates of socioemotional and salience processing. Yet the effects of OT over important large-scale networks involved in these processes, such as the default mode (DM), ventral attention (VA), and cingulo-opercular (CO) networks, remain unknown. Therefore, we conducted a placebo-controlled crossover study with intranasal 24 IU OT in 38 healthy male subjects using a resting-state functional magnetic resonance imaging paradigm to investigate its impact over these three networks candidates...
September 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28747648/resting-state-brain-connectivity-changes-in-obese-women-after-roux-en-y-gastric-bypass-surgery-a-longitudinal-study
#14
Gaia Olivo, Wei Zhou, Magnus Sundbom, Christina Zhukovsky, Pleunie Hogenkamp, Lamia Nikontovic, Julia Stark, Lyle Wiemerslage, Elna-Marie Larsson, Christian Benedict, Helgi B Schiöth
Bariatric surgery is an effective method to rapidly induce weight loss in severely obese people, however its impact on brain functional connectivity after longer periods of follow-up is yet to be assessed. We investigated changes in connectivity in 16 severely obese women one month before, one month after and one year after Roux-en-Y gastric bypass surgery (RYGB). 12 lean controls were also enrolled. Resting-state fMRI was acquired for all participants following an overnight fast and after a 260 kcal load...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743059/altered-connectivity-within-and-between-the-default-mode-central-executive-and-salience-networks-in-obsessive-compulsive-disorder
#15
Jie Fan, Mingtian Zhong, Jun Gan, Wanting Liu, Chaoyang Niu, Haiyan Liao, Hongchun Zhang, Jinyao Yi, Raymond C K Chan, Changlian Tan, Xiongzhao Zhu
BACKGROUND: Default mode network (DMN), central executive network (CEN) and salience network (SN) are the three most important intrinsic networks of the human brain. Recent studies emphasized the importance of the "triple-network model" which illustrated the interactions within and between DMN, CEN and SN in the pathophysiology of psychiatric disorders. However, previous studies of obsessive-compulsive disorder (OCD) just explored the altered connectivity within these networks while neglected the coupling between them...
July 20, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28737256/insula-based-networks-in-professional-musicians-evidence-for-increased-functional-connectivity-during-resting-state-fmri
#16
Anna M Zamorano, Ignacio Cifre, Pedro Montoya, Inmaculada Riquelme, Boris Kleber
Despite considerable research on experience-dependent neuroplasticity in professional musicians, detailed understanding of an involvement of the insula is only now beginning to emerge. We investigated the effects of musical training on intrinsic insula-based connectivity in professional classical musicians relative to nonmusicians using resting-state functional MRI. Following a tripartite scheme of insula subdivisions, coactivation profiles were analyzed for the posterior, ventral anterior, and dorsal anterior insula in both hemispheres...
July 24, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28734059/localized-reductions-in-resting-state-functional-connectivity-in-children-with-prenatal-alcohol-exposure
#17
Jia Fan, Paul A Taylor, Sandra W Jacobson, Christopher D Molteno, Suril Gohel, Bharat B Biswal, Joseph L Jacobson, Ernesta M Meintjes
Fetal alcohol spectrum disorders (FASD) are characterized by impairment in cognitive function that may or may not be accompanied by craniofacial anomalies, microcephaly, and/or growth retardation. Resting-state functional MRI (rs-fMRI), which examines the low-frequency component of the blood oxygen level dependent (BOLD) signal in the absence of an explicit task, provides an efficient and powerful mechanism for studying functional brain networks even in low-functioning and young subjects. Studies using independent component analysis (ICA) have identified a set of resting-state networks (RSNs) that have been linked to distinct domains of cognitive and perceptual function, which are believed to reflect the intrinsic functional architecture of the brain...
October 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28730732/shared-atypical-default-mode-and-salience-network-functional-connectivity-between-autism-and-schizophrenia
#18
Heng Chen, Lucina Q Uddin, Xujun Duan, Junjie Zheng, Zhiliang Long, Youxue Zhang, Xiaonan Guo, Yan Zhang, Jingping Zhao, Huafu Chen
Schizophrenia and autism spectrum disorder (ASD) are two prevalent neurodevelopmental disorders sharing some similar genetic basis and clinical features. The extent to which they share common neural substrates remains unclear. Resting-state fMRI data were collected from 35 drug-naïve adolescent participants with first-episode schizophrenia (15.6 ± 1.8 years old) and 31 healthy controls (15.4 ± 1.6 years old). Data from 22 participants with ASD (13.1 ± 3.1 years old) and 21 healthy controls (12...
July 21, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28707959/interactions-of-the-salience-network-and-its-subsystems-with-the-default-mode-and-the-central-executive-networks-in-normal-aging-and-mild-cognitive-impairment
#19
Ganesh B Chand, Junjie Wu, Ihab Hajjar, Deqiang Qiu
Previous functional magnetic resonance imaging (fMRI) investigations suggest that the intrinsically organized large-scale networks and the interaction between them might be crucial for cognitive activities. A triple network model, which consists of the default-mode network, salience network, and central-executive network, has been recently used to understand the connectivity patterns of the cognitively normal brains versus the brains with disorders. This model suggests that the salience network dynamically controls the default-mode and central-executive networks in healthy young individuals...
September 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28705767/common-and-distinct-dysfunctional-patterns-contribute-to-triple-network-model-in-schizophrenia-and-depression-a-preliminary-study
#20
Yuchao Jiang, Mingjun Duan, Xi Chen, Xin Chang, Hui He, YingJia Li, Cheng Luo, Dezhong Yao
BACKGROUND: Schizophrenia (SCH) and depression (DEP) are prevalent psychiatric disorders and share common and distinguished elements in their pathophysiology. A triple network model composed of the default mode network (DMN), salience network (SN) and central executive network (CEN) may represent a major abnormality across several psychiatric disorders including SCH and DEP. However, common and distinct dysfunctional patterns between SCH and DEP across three core networks remain unclear...
October 3, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
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