keyword
MENU ▼
Read by QxMD icon Read
search

Resting state functional MRI

keyword
https://www.readbyqxmd.com/read/28441445/impact-of-aberrant-cerebral-perfusion-on-resting-state-functional-mri-a-preliminary-investigation-of-moyamoya-disease
#1
Yituo Wang, Lubin Wang, Penggang Qiao, Fugeng Sheng, Cong Han, Enmao Ye, Yu Lei, Feng Yan, Shanshan Chen, Yuyang Zhu, Guiyun Mi, Gongjie Li, Zheng Yang
The impact of chronic cerebral hypoperfusion on resting-state blood oxygen level-dependent signal fluctuations remains unknown. We aimed to determine whether chronic ischemia induces changes in amplitude of low-frequency fluctuations (ALFF) and to investigate the correlation between ALFF and perfusion-weighted magnetic resonance imaging (PWI) parameters in patients with moyamoya disease (MMD). Thirty patients with pre- and postoperative resting-state functional magnetic resonance imaging and PWI were included, and thirty normal controls underwent resting-state functional magnetic resonance imaging...
2017: PloS One
https://www.readbyqxmd.com/read/28438464/association-of-medial-prefrontal-cortex-connectivity-with-consciousness-level-and-its-outcome-in-patients-with-acquired-brain-injury
#2
Xiaoyan Liu, Jingqi Li, Jian Gao, Zhen Zhou, Fanxia Meng, Gang Pan, Benyan Luo
Medial prefrontal cortex (mPFC) is usually known for participating in virtually all self related processing. However, few have investigated the role of mPFC in modulating conscious awareness. This study aimed to depict the relationship between the mPFC connectivity and the severity and outcome of the disorders of consciousness (DOC) among patients with acquired brain injury. Thirty-four patients with DOC (17 in a minimally conscious state and 17 in an unresponsive wakefulness syndrome/vegetative state) and 11 healthy controls were recruited, underwent clinical assessment and resting-state functional MRI scan, and were further followed up to evaluate recovery outcome using the Glasgow Outcome Scale...
April 21, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28435932/default-mode-network-subsystems-are-differentially-disrupted-in-posttraumatic-stress-disorder
#3
Danielle R Miller, Scott M Hayes, Jasmeet P Hayes, Jeffrey M Spielberg, Ginette Lafleche, Mieke Verfaellie
BACKGROUND: Posttraumatic stress disorder (PTSD) is a psychiatric disorder characterized by debilitating re-experiencing, avoidance, and hyperarousal symptoms following trauma exposure. Recent evidence suggests that individuals with PTSD show disrupted functional connectivity in the default mode network, an intrinsic network that consists of a midline core, a medial temporal lobe (MTL) subsystem, and a dorsomedial prefrontal cortex (dMPFC) subsystem. The present study examined whether functional connectivity in these subsystems is differentially disrupted in PTSD...
January 13, 2017: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/28429383/altered-eigenvector-centrality-is-related-to-local-resting-state-network-functional-connectivity-in-patients-with-longstanding-type-1-diabetes-mellitus
#4
Eelco van Duinkerken, Menno M Schoonheim, Richard G IJzerman, Annette C Moll, Jesus Landeira-Fernandez, Martin Klein, Michaela Diamant, Frank J Snoek, Frederik Barkhof, Alle-Meije Wink
INTRODUCTION: Longstanding type 1 diabetes (T1DM) is associated with microangiopathy and poorer cognition. In the brain, T1DM is related to increased functional resting-state network (RSN) connectivity in patients without, which was decreased in patients with clinically evident microangiopathy. Subcortical structure seems affected in both patient groups. How these localized alterations affect the hierarchy of the functional network in T1DM is unknown. Eigenvector centrality mapping (ECM) and degree centrality are graph theoretical methods that allow determining the relative importance (ECM) and connectedness (degree centrality) of regions within the whole-brain network hierarchy...
April 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28420972/multi-modal-multi-measure-and-multi-class-discrimination-of-adhd-with-hierarchical-feature-extraction-and-extreme-learning-machine-using-structural-and-functional-brain-mri
#5
Muhammad Naveed Iqbal Qureshi, Jooyoung Oh, Beomjun Min, Hang Joon Jo, Boreom Lee
Structural and functional MRI unveil many hidden properties of the human brain. We performed this multi-class classification study on selected subjects from the publically available attention deficit hyperactivity disorder ADHD-200 dataset of patients and healthy children. The dataset has three groups, namely, ADHD inattentive, ADHD combined, and typically developing. We calculated the global averaged functional connectivity maps across the whole cortex to extract anatomical atlas parcellation based features from the resting-state fMRI (rs-fMRI) data and cortical parcellation based features from the structural MRI (sMRI) data...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28416451/diffeomorphic-functional-brain-surface-alignment-functional-demons
#6
Karl-Heinz Nenning, Hesheng Liu, Satrajit Ghosh, Mert Sabuncu, Ernst Schwartz, Georg Langs
Aligning brain structures across individuals is a central prerequisite for comparative neuroimaging studies. Typically, registration approaches assume a strong association between the features used for alignment, such as macro-anatomy, and the variable observed, such as functional activation or connectivity. Here, we propose to use the structure of intrinsic resting state fMRI signal correlation patterns as a basis for alignment of the cortex in functional studies. Rather than assuming the spatial correspondence of functional structures between subjects, we have identified locations with similar connectivity profiles across subjects...
April 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28412557/electroconvulsive-therapy-changes-the-regional-resting-state-function-measured-by-regional-homogeneity-reho-and-amplitude-of-low-frequency-fluctuations-alff-in-elderly-major-depressive-disorder-patients-an-exploratory-study
#7
Xiao-Ming Kong, Shu-Xian Xu, Yan Sun, Ke-Yong Wang, Chen Wang, Ji Zhang, Jin-Xiang Xia, Li Zhang, Bo-Jian Tan, Xin-Hui Xie
Electroconvulsive therapy (ECT) is the most effective and rapid treatment for severe major depressive disorder (MDD) in elderly patients. The mechanism of ECT is unclear, and studies on ECT in elderly MDD patients by resting-state functional magnetic resonance imaging are rare. Thirteen elderly MDD patients were scanned before and after ECT using a 3.0T MRI scanner. Regional homogeneity (ReHo) and amplitude of low-frequency fluctuations (ALFF) were processed to compare resting-state function before and after treatment...
April 8, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28412442/human-brain-mapping-a-systematic-comparison-of-parcellation-methods-for-the-human-cerebral-cortex
#8
REVIEW
Salim Arslan, Sofia Ira Ktena, Antonios Makropoulos, Emma C Robinson, Daniel Rueckert, Sarah Parisot
The macro-connectome elucidates the pathways through which brain regions are structurally connected or functionally coupled to perform a specific cognitive task. It embodies the notion of representing and understanding all connections within the brain as a network, while the subdivision of the brain into interacting functional units is inherent in its architecture. As a result, the definition of network nodes is one of the most critical steps in connectivity network analysis. Although brain atlases obtained from cytoarchitecture or anatomy have long been used for this task, connectivity-driven methods have arisen only recently, aiming to delineate more homogeneous and functionally coherent regions...
April 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28412440/transient-networks-of-spatio-temporal-connectivity-map-communication-pathways-in-brain-functional-systems
#9
Alessandra Griffa, Benjamin Ricaud, Kirell Benzi, Xavier Bresson, Alessandro Daducci, Pierre Vandergheynst, Jean-Philippe Thiran, Patric Hagmann
The study of brain dynamics enables us to characterize the time-varying functional connectivity among distinct neural groups. However, current methods suffer from the absence of structural connectivity information. We propose to integrate infra-slow neural oscillations and anatomical-connectivity maps, as derived from functional and diffusion MRI, in a multilayer-graph framework that captures transient networks of spatio-temporal connectivity. These networks group anatomically wired and temporary synchronized brain regions and encode the propagation of functional activity on the structural connectome...
April 12, 2017: NeuroImage
https://www.readbyqxmd.com/read/28406312/repeatability-of-graph-theoretical-metrics-derived-from-resting-state-functional-networks-in-pediatric-epilepsy-patients
#10
Michael J Paldino, Zili D Chu, Mary L Chapieski, Farahnaz Golriz, Wei Zhang
OBJECTIVES: To measure the repeatability of metrics that quantify brain network architecture derived from resting-state fMRI (rs-fMRI) in a cohort of pediatric epilepsy patients. METHODS: We identified patients with: 1. epilepsy; 2. brain MRI at 3 Tesla; 3. two identical rs-fMRI acquisitions performed on the same day. Undirected, weighted networks were constructed based on the resting state time series using a range of processing parameters including parcellation size and graph threshold...
April 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28403437/postretinal-structure-and-function-in-severe-congenital-photoreceptor-blindness-caused-by-mutations-in-the-gucy2d-gene
#11
Geoffrey K Aguirre, Omar H Butt, Ritobrato Datta, Alejandro J Roman, Alexander Sumaroka, Sharon B Schwartz, Artur V Cideciyan, Samuel G Jacobson
Purpose: To examine how severe congenital blindness resulting from mutations of the GUCY2D gene alters brain structure and function, and to relate these findings to the notable preservation of retinal architecture in this form of Leber congenital amaurosis (LCA). Methods: Six GUCY2D-LCA patients (ages 20-46) were studied with optical coherence tomography of the retina and multimodal magnetic resonance imaging (MRI) of the brain. Measurements from this group were compared to those obtained from populations of normally sighted controls and people with congenital blindness of a variety of causes...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28394315/corrigendum-frequency-phase-analysis-of-resting-state-functional-mri
#12
Gadi Goelman, Rotem Dan, Filip Růžička, Ondrej Bezdicek, Evžen Růžička, Jan Roth, Josef Vymazal, Robert Jech
No abstract text is available yet for this article.
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28393012/the-effect-of-repetitive-subconcussive-collisions-on-brain-integrity-in-collegiate-football-players-over-a-single-football-season-a-multi-modal-neuroimaging-study
#13
Semyon M Slobounov, Alexa Walter, Hans C Breiter, David C Zhu, Xiaoxiao Bai, Tim Bream, Peter Seidenberg, Xianglun Mao, Brian Johnson, Thomas M Talavage
The cumulative effect of repetitive subconcussive collisions on the structural and functional integrity of the brain remains largely unknown. Athletes in collision sports, like football, experience a large number of impacts across a single season of play. The majority of these impacts, however, are generally overlooked, and their long-term consequences remain poorly understood. This study sought to examine the effects of repetitive collisions across a single competitive season in NCAA Football Bowl Subdivision athletes using advanced neuroimaging approaches...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28390292/functional-connectivity-of-the-circadian-clock-and-neural-substrates-of-sleep-wake-disturbance-in-delirium
#14
Sunghyon Kyeong, Soo-Hee Choi, Jung Eun Shin, Woo Suk Lee, Kyu Hyun Yang, Tae-Sub Chung, Jae-Jin Kim
A possible mechanism of disrupted circadian rhythms in delirium was identified using resting-state functional connectivity. Thirty-four delirious patients and 38 non-delirious controls were scanned for resting-state functional MRI. Seed-based connectivity of the suprachiasmatic nucleus was compared between the groups. In delirious patients functional connectivity from the circadian clock was increased to the dorsal anterior cingulate cortex and decreased to the posterior cingulate cortex, parahippocampal gyrus, cerebellum, and thalamus...
April 4, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28379618/association-between-serotonin-denervation-and-resting-state-functional-connectivity-in-mild-cognitive-impairment
#15
Frederick S Barrett, Clifford I Workman, Haris I Sair, Alena V Savonenko, Michael A Kraut, Devin J Sodums, Jin J Joo, Najlla Nassery, Christopher M Marano, Cynthia A Munro, Jason Brandt, Yun Zhou, Dean F Wong, Gwenn S Smith
Resting-state functional connectivity alterations have been demonstrated in Alzheimer's disease (AD) and mild cognitive impairment (MCI) before the observation of AD neuropathology, but mechanisms driving these changes are not well understood. Serotonin neurodegeneration has been observed in MCI and AD and is associated with cognitive deficits and neuropsychiatric symptoms, but the role of the serotonin system in relation to brain network dysfunction has not been a major focus of investigation. The current study investigated the relationship between serotonin transporter availability (SERT; measured using positron emission tomography) and brain network functional connectivity (measured using resting-state functional MRI) in 20 participants with MCI and 21 healthy controls...
April 5, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28374936/effect-of-smoking-on-resting-state-functional-connectivity-in-smokers-an-fmri-study
#16
Shuang Zhou, Dan Xiao, Peng Peng, Shuang-Kun Wang, Zhao Liu, Hai-Yan Qin, Sheng-Shu Li, Chen Wang
BACKGROUND AND OBJECTIVE: Smoking is a leading cause of death in the world. Aberrant brain function has been repeatedly linked to tobacco smoking. However, little is known about insula-based resting-state functional connectivity (rsFC) in non-deprived tobacco-dependent smokers. This study characterized the correlation between insula-based rsFC and tobacco dependence severity in non-deprived smokers. METHODS: A total of 37 male smokers and 37 age-matched male non-smokers completed resting-state functional MRI (fMRI) scans...
April 4, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28372326/does-functional-connectivity-provide-a-marker-for-cognitive-rehabilitation-effects-in-alzheimer-s-disease-an-interventional-study
#17
Sina Ochmann, Martin Dyrba, Michel J Grothe, Elisabeth Kasper, Steffi Webel, Karlheinz Hauenstein, Stefan J Teipel
BACKGROUND: Cognitive rehabilitation (CR) is a cognitive intervention for patients with Alzheimer's disease (AD) that aims to maintain everyday competences. The analysis of functional connectivity (FC) in resting-state functional MRI has been used to investigate the effects of cognitive interventions. OBJECTIVES: We evaluated the effect of CR on the default mode network FC in a group of patients with mild AD, compared to an active control group. METHODS: We performed a three-month interventional study including 16 patients with a diagnosis of AD...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28371656/functional-network-connectivity-alterations-in-schizophrenia-and-depression
#18
Xing-Jie Wu, Ling-Li Zeng, Hui Shen, Lin Yuan, Jian Qin, Peng Zhang, Dewen Hu
There is a high degree of overlap between the symptoms of major depressive disorder (MDD) and schizophrenia, but it remains unclear whether the similar symptoms are derived from convergent alterations in functional network connectivity. In this study, we performed a group independent component analysis on resting-state functional MRI data from 20 MDD patients, 24 schizophrenia patients, and 43 matched healthy controls. The functional network connectivity analysis revealed that, compared to healthy controls, the MDD and schizophrenia patients exhibited convergent decreased positive connectivity between the left and right fronto-parietal control network and decreased negative connectivity between the left control and medial visual networks...
March 28, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28369458/the-healthy-brain-network-serial-scanning-initiative-a-resource-for-evaluating-inter-individual-differences-and-their-reliabilities-across-scan-conditions-and-sessions
#19
David O'Connor, Natan Vega Potler, Meagan Kovacs, Ting Xu, Lei Ai, John Pellman, Tamara Vanderwal, Lucas C Parra, Samantha Cohen, Satrajit Ghosh, Jasmine Escalera, Natalie Grant-Villegas, Yael Osman, Anastasia Bui, R Cameron Craddock, Michael P Milham
Background: Although typically measured during the resting state, a growing literature is illustrating the ability to map intrinsic connectivity with functional MRI during task and naturalistic viewing conditions. These paradigms are drawing excitement due to their greater tolerability in clinical and developing populations and because they enable a wider range of analyses (e.g., inter-subject correlations). To be clinically useful, the test-retest reliability of connectivity measured during these paradigms needs to be established...
February 1, 2017: GigaScience
https://www.readbyqxmd.com/read/28359293/memory-performance-related-dynamic-brain-connectivity-indicates-pathological-burden-and-genetic-risk-for-alzheimer-s-disease
#20
Frances C Quevenco, Maria G Preti, Jiri M G van Bergen, Jun Hua, Michael Wyss, Xu Li, Simon J Schreiner, Stefanie C Steininger, Rafael Meyer, Irene B Meier, Adam M Brickman, Sandra E Leh, Anton F Gietl, Alfred Buck, Roger M Nitsch, Klaas P Pruessmann, Peter C M van Zijl, Christoph Hock, Dimitri Van De Ville, Paul G Unschuld
BACKGROUND: The incidence of Alzheimer's disease (AD) strongly relates to advanced age and progressive deposition of cerebral amyloid-beta (Aβ), hyperphosphorylated tau, and iron. The purpose of this study was to investigate the relationship between cerebral dynamic functional connectivity and variability of long-term cognitive performance in healthy, elderly subjects, allowing for local pathology and genetic risk. METHODS: Thirty seven participants (mean (SD) age 74 (6...
March 31, 2017: Alzheimer's Research & Therapy
keyword
keyword
15221
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"