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Intra-salience network functional connection, fMRI

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
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
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
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
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
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
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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