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Intra-salience network functional connection, fMRI

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https://www.readbyqxmd.com/read/28762756/intranasal-oxytocin-selectively-modulates-large-scale-brain-networks-in-humans
#1
Katja Brodmann, Oliver Gruber, Roberto Goya-Maldonado
A growing body of evidence indicates that the neuropeptide oxytocin (OT) alters the neural correlates of socio-emotional 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 24IU OT in 38 healthy male subjects using a resting-state fMRI (rs-fMRI) paradigm to investigate its impact over these three candidate networks...
August 1, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28734059/localized-reductions-in-resting-state-functional-connectivity-in-children-with-prenatal-alcohol-exposure
#2
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...
July 22, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28566724/aberrant-intra-and-internetwork-functional-connectivity-in-depressed-parkinson-s-disease
#3
Luqing Wei, Xiao Hu, Yajing Zhu, Yonggui Yuan, Weiguo Liu, Hong Chen
Much is known concerning the underlying mechanisms of Parkinson's disease (PD) with depression, but our understanding of this disease at the neural-system level remains incomplete. This study used resting-state functional MRI (rs-fMRI) and independent component analysis (ICA) to investigate intrinsic functional connectivity (FC) within and between large-scale neural networks in 20 depressed PD (dPD) patients, 35 non-depressed PD (ndPD) patients, and 34 healthy controls (HC). To alleviate the influence caused by ICA model order selection, this work reported results from analyses at 2 levels (low and high model order)...
May 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28453543/altered-resting-state-intra-and-inter-network-functional-connectivity-in-patients-with-persistent-somatoform-pain-disorder
#4
Zhiyong Zhao, Tianming Huang, Chaozheng Tang, Kaiji Ni, Xiandi Pan, Chao Yan, Xiaoduo Fan, Dongrong Xu, Yanli Luo
Patients with persistent somatoform pain disorder (PSPD) usually experience various functional impairments in pain, emotion, and cognition, which cannot be fully explained by a physiological process or a physical disorder. However, it is still not clear for the mechanism underlying the pathogenesis of PSPD. The present study aimed to explore the intra- and inter-network functional connectivity (FC) differences between PSPD patients and healthy controls (HCs). Functional magnetic resonance imaging (fMRI) was performed in 13 PSPD patients and 23 age- and gender-matched HCs...
2017: PloS One
https://www.readbyqxmd.com/read/28160660/altered-default-mode-fronto-parietal-and-salience-networks-in-adolescents-with-internet-addiction
#5
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)...
July 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/27825906/aberrant-intra-salience-network-dynamic-functional-connectivity-impairs-large-scale-network-interactions-in-schizophrenia
#6
Xiangpeng Wang, Wenwen Zhang, Yujing Sun, Min Hu, Antao Chen
Aberrant functional interactions between several large-scale networks, especially the central executive network (CEN), the default mode network (DMN) and the salience network (SN), have been postulated as core pathophysiologic features of schizophrenia; however, the attributing factors of which remain unclear. The study employed resting-state fMRI with 77 participants (42 patients and 35 controls). We performed dynamic functional connectivity (DFC) and functional connectivity (FC) analyses to explore the connectivity patterns of these networks...
December 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27378896/alien-hand-restless-brain-salience-network-and-interhemispheric-connectivity-disruption-parallel-emergence-and-extinction-of-diagonistic-dyspraxia
#7
Ben Ridley, Marion Beltramone, Jonathan Wirsich, Arnaud Le Troter, Eve Tramoni, Sandrine Aubert, Sophie Achard, Jean-Philippe Ranjeva, Maxime Guye, Olivier Felician
Diagonistic dyspraxia (DD) is by far the most spectacular manifestation reported by sufferers of acute corpus callosum (CC) injury (so-called "split-brain"). In this form of alien hand syndrome, one hand acts at cross purposes with the other "against the patient's will". Although recent models view DD as a disorder of motor control, there is still little information regarding its neural underpinnings, due to widespread connectivity changes produced by CC insult, and the obstacle that non-volitional movements represent for task-based functional neuroimaging studies...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/26973154/underconnected-but-not-broken-dynamic-functional-connectivity-mri-shows-underconnectivity-in-autism-is-linked-to-increased-intra-individual-variability-across-time
#8
Maryam Falahpour, Wesley K Thompson, Angela E Abbott, Afrooz Jahedi, Mark E Mulvey, Michael Datko, Thomas T Liu, Ralph-Axel Müller
Autism spectrum disorder (ASD) is characterized by core sociocommunicative impairments. Atypical intrinsic functional connectivity (iFC) has been reported in numerous studies of ASD. A majority of findings has indicated long-distance underconnectivity. However, fMRI studies have thus far exclusively examined static iFC across several minutes of scanning. We examined temporal variability of iFC, using sliding window analyses in selected high-quality (low-motion) consortium datasets from 76 ASD and 76 matched typically developing (TD) participants (Study 1) and in-house data from 32 ASD and 32 TD participants...
June 2016: Brain Connectivity
https://www.readbyqxmd.com/read/26834594/decreased-intra-and-inter-salience-network-functional-connectivity-is-related-to-trait-anxiety-in-adolescents
#9
Haiyang Geng, Xuebing Li, Jie Chen, Xinying Li, Ruolei Gu
OBJECTIVE: Adolescence is a critical period for the vulnerability of anxiety. Imaging studies focusing on adolescents' susceptibility to anxiety suggest that the different development trajectories between the limbic system and the executive control system may play important roles in this phenomenon. However, few studies have explored the brain basis of this susceptibility from the perspective of functional networks. The salience network (SN) consists of a series of key limbic and prefrontal regions that are engaged in the development of anxiety, such as the amygdala, anterior insula (AI), and dorsal anterior cingulate cortex (dACC)...
2015: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/24478665/insular-dysfunction-within-the-salience-network-is-associated-with-severity-of-symptoms-and-aberrant-inter-network-connectivity-in-major-depressive-disorder
#10
Andrei Manoliu, Chun Meng, Felix Brandl, Anselm Doll, Masoud Tahmasian, Martin Scherr, Dirk Schwerthöffer, Claus Zimmer, Hans Förstl, Josef Bäuml, Valentin Riedl, Afra M Wohlschläger, Christian Sorg
Major depressive disorder (MDD) is characterized by altered intrinsic functional connectivity within (intra-iFC) intrinsic connectivity networks (ICNs), such as the Default Mode- (DMN), Salience- (SN) and Central Executive Network (CEN). It has been proposed that aberrant switching between DMN-mediated self-referential and CEN-mediated goal-directed cognitive processes might contribute to MDD, possibly explaining patients' difficulties to disengage the processing of self-focused, often negatively biased thoughts...
2013: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/24198777/shifted-intrinsic-connectivity-of-central-executive-and-salience-network-in-borderline-personality-disorder
#11
Anselm Doll, Christian Sorg, Andrei Manoliu, Andreas Wöller, Chun Meng, Hans Förstl, Claus Zimmer, Afra M Wohlschläger, Valentin Riedl
Borderline personality disorder (BPD) is characterized by "stable instability" of emotions and behavior and their regulation. This emotional and behavioral instability corresponds with a neurocognitive triple network model of psychopathology, which suggests that aberrant emotional saliency and cognitive control is associated with aberrant interaction across three intrinsic connectivity networks [i.e., the salience network (SN), default mode network (DMN), and central executive network (CEN)]. The objective of the current study was to investigate whether and how such triple network intrinsic functional connectivity (iFC) is changed in patients with BPD...
2013: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/24183856/epileptic-discharges-specifically-affect-intrinsic-connectivity-networks-during-absence-seizures
#12
Zhiqiang Zhang, Wei Liao, Zhengge Wang, Qiang Xu, Fang Yang, Dante Mantini, Qing Jiao, Lei Tian, Yijun Liu, Guangming Lu
Intrinsic connectivity network (ICN) technique provides a feasible way for evaluating cognitive impairments in epilepsy. This EEG-fMRI study aims to comprehensively assess the alterations of ICNs affected by generalized spike-and-wave discharge (GSWD) during absence seizure (AS). Twelve fMRI sessions with GSWD, and individually paired non-GSWD sessions were acquired from 16 patients with AS. Ten ICNs corresponding to seizure origination and cognitive processes were extracted using independent component analysis...
January 15, 2014: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/23730284/insular-dysfunction-reflects-altered-between-network-connectivity-and-severity-of-negative-symptoms-in-schizophrenia-during-psychotic-remission
#13
Andrei Manoliu, Valentin Riedl, Anselm Doll, Josef Georg Bäuml, Mark Mühlau, Dirk Schwerthöffer, Martin Scherr, Claus Zimmer, Hans Förstl, Josef Bäuml, Afra M Wohlschläger, Kathrin Koch, Christian Sorg
Schizophrenia is characterized by aberrant intrinsic functional connectivity (iFC) within and between intrinsic connectivity networks (ICNs), including the Default Mode- (DMN), Salience- (SN), and Central Executive Network (CEN). The anterior insula (AI) of the SN has been demonstrated to modulate DMN/CEN interactions. Recently, we found that the dependence of DMN/CEN interactions on SN's right AI activity is altered in patients with schizophrenia in acute psychosis and related to psychotic symptoms, indicating a link between aberrant AI, DMN, CEN, and psychosis...
2013: Frontiers in Human Neuroscience
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