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https://www.readbyqxmd.com/read/28326925/interaction-of-acupuncture-treatment-and-manipulation-laterality-modulated-by-the-default-mode-network
#1
Xuan Niu, Ming Zhang, Zhenyu Liu, Lijun Bai, Chuanzhu Sun, Shan Wang, Xiaocui Wang, Zhen Chen, Hongyan Chen, Jie Tian
Appropriate selection of ipsilateral or contralateral electroacupuncture (corresponding to the pain site) plays an important role in reaching its better curative effect; however, the involving brain mechanism still remains unclear. Compared with the heat pain model generally established in previous study, capsaicin pain model induces reversible cutaneous allodynia and is proved to be better simulating aspects of clinical nociceptive and neuropathic pain. In the current study, 24 subjects were randomly divided into two groups with a 2 × 2 factorial design: laterality (ipsi- or contralateral side, inter-subject) × treatment with counter-balanced at an interval of one week (verum and placebo electroacupuncture, within-subject)...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28326037/differences-on-brain-connectivity-in-adulthood-are-present-in-subjects-with-iron-deficiency-anemia-in-infancy
#2
Cecilia Algarin, Keerthana Deepti Karunakaran, Sussanne Reyes, Cristian Morales, Betsy Lozoff, Patricio Peirano, Bharat Biswal
Iron deficiency continues to be the most prevalent micronutrient deficit worldwide. Since iron is involved in several processes including myelination, dopamine neurotransmission and neuronal metabolism, the presence of iron deficiency anemia (IDA) in infancy relates to long-lasting neurofunctional effects. There is scarce data regarding whether these effects would extend to former iron deficient anemic human adults. Resting state functional magnetic resonance imaging (fMRI) is a novel technique to explore patterns of functional connectivity...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28325028/tracking-intrinsic-connectivity-brain-network-features-during-successive-pseudo-resting-states-and-interoceptive-task-fmri
#3
Behnaz Jarrahi, Dante Mantini
Advanced multivariate analyses of functional magnetic resonance imaging (fMRI) data based on blood oxygen level-dependent (BOLD) contras have revealed that the human brain organizes its activities into multiple intrinsic connectivity networks (ICNs). Several fMRI studies have evaluated the modulations of these networks during different cognitive or emotional tasks using blind source separation techniques particularly the independent component analysis (ICA). In this exploratory study, we applied ICA methodology to examine ICN modulations under different interoceptive conditions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28325027/identifying-the-effects-of-visceral-interoception-on-human-brain-connectome-a-multivariate-analysis-of-covariance-of-fmri-data
#4
Behnaz Jarrahi, Dante Mantini
Sources of variations in the neural circuitry of the human brain and interrelationship between intrinsic connectivity networks (ICNs) are still a matter of debate and ongoing research. Here, we applied a multivariate analysis of covariance (MANCOVA) based on high-dimensional independent component analysis (ICA) to identify the effects of interoception and related variables on human brain connectome. Fifteen healthy right-handed subjects (all females, age range 21 - 48 years; mean age = 30.3, SD = 8.7 years) underwent a blood-oxygen-level-dependent (BOLD) functional magnetic resonance imaging (fMRI) that included continuous intravesical saline infusion and drainage...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323821/comparing-resting-state-fmri-de-noising-approaches-using-multi-and-single-echo-acquisitions
#5
Ottavia Dipasquale, Arjun Sethi, Maria Marcella Laganà, Francesca Baglio, Giuseppe Baselli, Prantik Kundu, Neil A Harrison, Mara Cercignani
Artifact removal in resting state fMRI (rfMRI) data remains a serious challenge, with even subtle head motion undermining reliability and reproducibility. Here we compared some of the most popular single-echo de-noising methods-regression of Motion parameters, White matter and Cerebrospinal fluid signals (MWC method), FMRIB's ICA-based X-noiseifier (FIX) and ICA-based Automatic Removal Of Motion Artifacts (ICA-AROMA)-with a multi-echo approach (ME-ICA) that exploits the linear dependency of BOLD on the echo time...
2017: PloS One
https://www.readbyqxmd.com/read/28321606/evidence-for-cognitive-resource-imbalance-in-adolescents-with-narcolepsy
#6
Suzanne T Witt, Natasha Morales Drissi, Sofie Tapper, Anna Wretman, Attila Szakács, Tove Hallböök, Anne-Marie Landtblom, Thomas Karlsson, Peter Lundberg, Maria Engström
The study investigated brain activity changes during performance of a verbal working memory task in a population of adolescents with narcolepsy. Seventeen narcolepsy patients and twenty healthy controls performed a verbal working memory task during simultaneous fMRI and EEG acquisition. All subjects also underwent MRS to measure GABA and Glutamate concentrations in the medial prefrontal cortex. Activation levels in the default mode network and left middle frontal gyrus were examined to investigate whether narcolepsy is characterized by an imbalance in cognitive resources...
March 20, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28318404/magnetization-transfer-imaging-of-treatment-resistant-depression
#7
Zhiyun Jia, Wei Peng, Ziqi Chen, Huaiqiang Sun, Huawei Zhang, Weihong Kuang, Xiaoqi Huang, Su Lui, Qiyong Gong
Purpose To detect biophysical abnormalities in patients with postmedication treatment-resistant depression (TRD) with magnetization transfer imaging. Materials and Methods This study was approved by the local ethics committee, and written informed consent was obtained from all participants. Participants included 69 patients with major depressive disorder (MDD) (30 with TRD; 39 with non-TRD) and 41 healthy control subjects. Age and sex were examined with one-way analysis of variance and χ(2) tests and were well matched among the three groups...
March 17, 2017: Radiology
https://www.readbyqxmd.com/read/28314821/phases-of-hyper-and-hypo-connectivity-in-the-default-mode-and-salience-networks-track-with-amyloid-and-tau-in-clinically-normal-individuals
#8
Aaron P Schultz, Jasmeer P Chhatwal, Trey Hedden, Elizabeth C Mormino, Bernard J Hanseeuw, Jorge Sepulcre, Willem Huijbers, Molly LaPoint, Rachel F Buckley, Keith A Johnson, Reisa A Sperling
Alzheimer's disease (AD) is characterized by two hallmark molecular pathologies: amyloid aβ1-42, and Tau neurofibrillary tangles. To date, studies of functional connectivity MRI (fcMRI) in preclinical AD have relied on associations with in-vivo measures of amyloid pathology. With the recent advent of in-vivo Tau-PET tracers it is now possible to extend investigations on fcMRI in a sample of cognitively normal elderly humans to regional measures of Tau. We modeled fcMRI measures across four major cortical association networks (Default Mode (DMN), Salience, Dorsal Attention (DAN), and Frontoparietal Control (FPCN)) as a function of global cortical amyloid (PiB-PET) and regional Tau (AV1451-PET) in entorhinal, inferior temporal (IT), and inferior parietal (IP) cortex...
March 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28304298/exercise-training-and-functional-connectivity-changes-in-mild-cognitive-impairment-and-healthy-elders
#9
Theresa J Chirles, Katherine Reiter, Lauren R Weiss, Alfonso J Alfini, Kristy A Nielson, J Carson Smith
BACKGROUND: Effective interventions are needed to improve brain function in mild cognitive impairment (MCI), an early stage of Alzheimer's disease (AD). The posterior cingulate cortex (PCC)/precuneus is a hub of the default mode network (DMN) and is preferentially vulnerable to disruption of functional connectivity in MCI and AD. OBJECTIVE: We investigated whether 12 weeks of aerobic exercise could enhance functional connectivity of the PCC/precuneus in MCI and healthy elders...
March 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28304293/coordinate-based-meta-analysis-of-the-default-mode-and-salience-network-for-target-identification-in-non-invasive-brain-stimulation-of-alzheimer-s-disease-and-behavior-variant-frontotemporal-dementia-networks
#10
Michela Pievani, Lorenzo Pini, Clarissa Ferrari, Francesca B Pizzini, Ilaria Boscolo Galazzo, Chiara Cobelli, Maria Cotelli, Rosa Manenti, Giovanni B Frisoni
BACKGROUND: The accurate choice of the site of non-invasive brain stimulation (NIBS) is an important factor in trial design. OBJECTIVE: Based on the observation that Alzheimer's disease (AD) and behavioral frontotemporal dementia (bvFTD) affect specific large-scale networks, i.e., the default mode network (DMN) and the salience network (SN), respectively, we aimed to identify population-average coordinates of these networks that could be used as potential targets in NIBS trials aiming to modulate these circuits...
March 13, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28297595/decreased-resting-state-activity-in-the-precuneus-is-associated-with-depressive-episodes-in-recurrent-depression
#11
Chun-Hong Liu, Xin Ma, Zhen Yuan, Lu-Ping Song, Bing Jing, Hong-Yu Lu, Li-Rong Tang, Jin Fan, Martin Walter, Cun-Zhi Liu, Lihong Wang, Chuan-Yue Wang
OBJECTIVE: To investigate alterations in resting-state spontaneous brain activity in patients with major depressive disorder (MDD) experiencing multiple episodes. METHODS: Between May 2007 and September 2014, 24 recurrent and 22 remitted patients diagnosed with MDD with the Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I), and 69 healthy controls matched for age, sex, and educational level participated in this study. Among them, 1 healthy control was excluded due to excessive head motion...
March 14, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28296296/biplane-interventional-pediatric-system-with-cone-beam-ct-dose-and-image-quality-characterization-for-the-default-protocols
#12
Eva Corredoira, Eliseo Vañó, Luis Alejo, Carlos Ubeda, Federico Gutiérrez-Larraya, Julia Garayoa
The aim of this study was to assess image quality and radiation dose of a biplane angiographic system with cone-beam CT (CBCT) capability tuned for pediatric cardiac procedures. The results of this study can be used to explore dose reduction techniques. For pulsed fluoroscopy and cine modes, polymethyl methacrylate phantoms of various thicknesses and a Leeds TOR 18-FG test object were employed. Various fields of view (FOV) were selected. For CBCT, the study employed head and body dose phantoms, Catphan 504, and an anthropomorphic cardiology phantom...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28295280/structural-and-functional-connectivity-in-children-and-adolescents-with-and-without-attention-deficit-hyperactivity-disorder
#13
Dienke J Bos, Bob Oranje, Michelle Achterberg, Chantal Vlaskamp, Sara Ambrosino, Marcel A de Reus, Martijn P van den Heuvel, Serge A R B Rombouts, Sarah Durston
BACKGROUND: Attention deficit/hyperactivity disorder (ADHD) has frequently been associated with changes in resting-state functional connectivity, and decreased white matter (WM) integrity. In the current study, we investigated functional connectivity within Default Mode and frontal control resting-state networks (RSNs) in children with and without ADHD. We hypothesized the RSNs of interest would show a pattern of impaired functional integration and segregation and corresponding changes in WM structure...
March 10, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28294693/functional-network-connectivity-abnormalities-in-multiple-sclerosis-correlations-with-disability-and-cognitive-impairment
#14
Maria A Rocca, Paola Valsasina, Victoria M Leavitt, Mariaemma Rodegher, Marta Radaelli, Gianna C Riccitelli, Vittorio Martinelli, Filippo Martinelli-Boneschi, Andrea Falini, Giancarlo Comi, Massimo Filippi
OBJECTIVE: To investigate resting state (RS) functional connectivity (FC) abnormalities within the principal brain networks in a large cohort of multiple sclerosis (MS) patients, to define the trajectory of FC changes over disease stages and their relation with clinical and structural magnetic resonance imaging (MRI) measures. METHODS: RS functional magnetic resonance imaging (fMRI), clinical, and neuropsychological evaluation were obtained from 215 MS patients and 98 healthy controls...
March 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28294457/structural-and-functional-brain-network-correlates-of-depressive-symptoms-in-premanifest-huntington-s-disease
#15
Peter McColgan, Adeel Razi, Sarah Gregory, Kiran K Seunarine, Alexandra Durr, Raymund A C Roos, Blair R Leavitt, Rachael I Scahill, Chris A Clark, Doug R Langbehn, Geraint Rees, Sarah J Tabrizi
Depression is common in premanifest Huntington's disease (preHD) and results in significant morbidity. We sought to examine how variations in structural and functional brain networks relate to depressive symptoms in premanifest HD and healthy controls. Brain networks were constructed using diffusion tractography (70 preHD and 81 controls) and resting state fMRI (92 preHD and 94 controls) data. A sub-network associated with depression was identified in a data-driven fashion and network-based statistics was used to investigate which specific connections correlated with depression scores...
March 15, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28293804/anomalous-gray-matter-structural-networks-in-recent-onset-post-traumatic-stress-disorder
#16
Shun Qi, Yun-Feng Mu, Long-Biao Cui, Jian Zhang, Fan Guo, Qing-Rong Tan, Mei Shi, Kang Liu, Yi-Bin Xi, Nan-Yin Zhang, Xiao-Liang Zhang, Yong He, Jian Yang, Hong Yin
Alterations of the topological organization of abnormal regions or network-level structural aberrations are still poorly understood for post-traumatic stress disorder (PTSD). Herein, we investigated brain structural networks in recent-onset PTSD patients, all affected by the coalmine-flood disaster. Cortical networks were studied in recent onset PTSD patients (n = 15) and matched healthy controls (n = 25). Cortical networks were constructed by thresholding correlation matrices of 150 regions and quantified using graph theoretical approaches...
March 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28293181/from-anomalies-to-essential-scientific-revolution-intrinsic-brain-activity-in-the-light-of-kuhn-s-philosophy-of-science
#17
REVIEW
Marek Havlík
The first step toward a modern understanding of fMRI resting brain activity was made by Bharat Biswal in 1995. This surprising, and at first rejected, discovery is now associated with many resting state networks, notably the famous default mode network (DMN). Resting state activity and DMN significantly reassessed our traditional beliefs and conventions about the functioning of the brain. For the majority of the twentieth century, neuroscientists assumed that the brain is mainly the "reactive engine" to the environment operating mostly through stimulation...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28290076/brain-functional-connectivity-in-lung-cancer-population-an-exploratory-study
#18
M Simó, X Rifà-Ros, L Vaquero, P Ripollés, N Cayuela, J Jové, A Navarro, F Cardenal, J Bruna, Antoni Rodríguez-Fornells
The present study aimed to explore the functional connectivity differences in Resting State Networks (RSNs) induced by cancer and chemotherapy in Lung Cancer (LC) patients using an Independent Component Analysis (ICA). Three matched groups of 15 LC patients following Chemotherapy (C+), 15 LC patients before Chemotherapy (C-) and 15 Healthy Controls (HC) were included. Analysis was performed using ICA and a multivariate pattern analysis (MVPA) to classify groups based on profiles of functional connectivity. We found significant differences in four of the RSN identified: Default Mode Network (DMN), Predominantly Left and Right Anterior Temporal Network, and Cerebellum Network...
March 13, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28289811/caffeine-impact-on-working-memory-related-network-activation-patterns-in-early-stages-of-cognitive-decline
#19
Sven Haller, Marie-Louise Montandon, Cristelle Rodriguez, Dominik Moser, Simona Toma, Jeremy Hofmeister, Panteleimon Giannakopoulos
PURPOSE: Recent evidence indicates that caffeine may have a beneficial effect on cognitive decline and dementia. The current investigation assessed the effect of acute caffeine administration on working memory during the earliest stage of cognitive decline in elderly participants. METHODS: The study includes consecutive 45 elderly controls and 18 individuals with mild cognitive impairment (MCI, 71.6 ± 4.7 years, 7 females). During neuropsychological follow-up at 18 months, 24 controls remained stable (sCON, 70...
March 13, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28289373/reentrant-information-flow-in-electrophysiological-rat-default-mode-network
#20
Wei Jing, Daqing Guo, Yunxiang Zhang, Fengru Guo, Pedro A Valdés-Sosa, Yang Xia, Dezhong Yao
Functional MRI (fMRI) studies have demonstrated that the rodent brain shows a default mode network (DMN) activity similar to that in humans, offering a potential preclinical model both for physiological and pathophysiological studies. However, the neuronal mechanism underlying rodent DMN remains poorly understood. Here, we used electrophysiological data to analyze the power spectrum and estimate the directed phase transfer entropy (dPTE) within rat DMN across three vigilance states: wakeful rest (WR), slow-wave sleep (SWS), and rapid-eye-movement sleep (REMS)...
2017: Frontiers in Neuroscience
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