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Resting state fmri psychiatric

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https://www.readbyqxmd.com/read/29163844/identifying-current-and-remitted-major-depressive-disorder-with-the-hurst-exponent-a-comparative-study-on-two-automated-anatomical-labeling-atlases
#1
Bin Jing, Zhuqing Long, Han Liu, Huagang Yan, Jianxin Dong, Xiao Mo, Dan Li, Chunhong Liu, Haiyun Li
Major depressive disorder (MDD) is a leading world-wide psychiatric disorder with high recurrence rate, therefore, it is desirable to identify current MDD (cMDD) and remitted MDD (rMDD) for their appropriate therapeutic interventions. In the study, 19 cMDD, 19 rMDD and 19 well-matched healthy controls (HC) were enrolled and scanned with the resting-state functional magnetic resonance imaging (rs-fMRI). The Hurst exponent (HE) of rs-fMRI in AAL-90 and AAL-1024 atlases were calculated and compared between groups...
October 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/29102817/low-frequency-fluctuation-of-brain-spontaneous-activity-and-obsessive-compulsive-symptoms-in-a-large-school-age-sample
#2
Marcelo Q Hoexter, Claudinei E Biazoli, Pedro G Alvarenga, Marcelo C Batistuzzo, Giovanni A Salum, Ary Gadelha, Pedro M Pan, Mauricio Anés, Leticia Mancini-Martins, Luciana M Moura, Carles Soriano-Mas, Marco A G Del' Aquilla, Edson Amaro, Luis A Rohde, Andrea P Jackowski, Rodrigo A Bressan, Euripedes C Miguel, Maria C do Rosario, João R Sato
BACKGROUND: The present study was designed to explore alterations in brain dynamics at rest that are associated with Obsessive Compulsive Symptoms (OCS) in childhood by measuring low frequency fluctuation of spontaneous brain activity in a large school community sample from a developing country. METHOD: Resting state functional magnetic resonance imaging data were collected in a sample of 655 children and adolescents (6-15 years old) from the brazilian 'High Risk Cohort Study for Psychiatric Disorders (HRC)'...
October 16, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29066900/abnormal-functional-connectivity-of-the-posterior-cingulate-cortex-is-associated-with-depressive-symptoms-in-patients-with-alzheimer-s-disease
#3
Jiangtao Zhang, Zhongwei Guo, Xiaozheng Liu, Xize Jia, Jiapeng Li, Yaoyao Li, Danmei Lv, Wei Chen
BACKGROUND: Depressive symptoms are significant and very common psychiatric complications in patients with Alzheimer's disease (AD), which can aggravate the decline in social function. However, changes in the functional connectivity (FC) of the brain in AD patients with depressive symptoms (D-AD) remain unclear. OBJECTIVE: To investigate whether any differences exist in the FC of the posterior cingulate cortex (PCC) between D-AD patients and non-depressed AD patients (nD-AD)...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29059927/evaluating-network-brain-connectivity-in-alcohol-postdependent-state-using-network-based-statistic
#4
Antonio Diaz-Parra, Ursula Perez-Ramirez, Jesus Pacheco-Torres, Simone Pfarr, Wolfgang H Sommer, David Moratal, Santiago Canals
The use of functional magnetic resonance imaging (fMRI) to measure spontaneous fluctuations in blood oxygen level dependent (BOLD) signals has become an indispensable tool to investigate how brain regions interact and form long-range networks. Statistical dependency measures between brain regions obtained from BOLD signals can inform about brain functional states in longitudinal studies of neurological and psychiatric disorders. Furthermore, its non-invasive nature allows comparable measurements in clinical and animal studies, providing excellent translational capabilities...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29052616/pregenual-anterior-cingulate-dysfunction-associated-with-depression-in-ocd-an-integrated-multimodal-fmri-1-h-mrs-study
#5
Reza Tadayonnejad, Rangaprakash Deshpande, Olusola Ajilore, Teena Moody, Francesca Morfini, Ronald Ly, Joseph O'Neill, Jamie D Feusner
Depression is a commonly-occurring symptom in obsessive-compulsive disorder (OCD), and is associated with worse functional impairment, poorer quality of life, and poorer treatment response. Understanding the underlying neurochemical and connectivity-based brain mechanisms of this important symptom domain in OCD is necessary for development of novel, more globally effective treatments. To investigate biopsychological mechanisms of comorbid depression in OCD, we examined effective connectivity and neurochemical signatures in the pregenual anterior cingulate cortex (pACC), a structure known to be involved in both OCD and depression...
October 20, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29036672/convergence-and-divergence-of-brain-network-dysfunction-in-deficit-and-non-deficit-schizophrenia
#6
Miao Yu, Zhengjia Dai, Xiaowei Tang, Xiang Wang, Xiaobin Zhang, Weiwei Sha, Shuqiao Yao, Ni Shu, Xindi Wang, Jiaying Yang, Xiangyang Zhang, Xiangrong Zhang, Yong He, Zhijun Zhang
Deficit schizophrenia (DS), characterized by primary and enduring negative symptoms, has been considered as a pathophysiologically distinct schizophrenic subgroup. Neuroimaging characteristics of DS, especially functional brain network architecture, remain largely unknown. Resting-state functional magnetic resonance imaging and graph theory approaches were employed to investigate the topological organization of whole-brain functional networks of 114 male participants including 33 DS, 41 non-deficit schizophrenia (NDS) and 40 healthy controls (HCs)...
October 21, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28977523/resting-state-functional-connectivity-based-biomarkers-and-functional-mri-based-neurofeedback-for-psychiatric-disorders-a-challenge-for-developing-theranostic-biomarkers
#7
Takashi Yamada, Ryu-Ichiro Hashimoto, Noriaki Yahata, Naho Ichikawa, Yujiro Yoshihara, Yasumasa Okamoto, Nobumasa Kato, Hidehiko Takahashi, Mitsuo Kawato
Psychiatric research has been hampered by an explanatory gap between psychiatric symptoms and their neural underpinnings, which has resulted in poor treatment outcomes. This situation has prompted us to shift from symptom-based diagnosis to data-driven diagnosis, aiming to redefine psychiatric disorders as disorders of neural circuitry. Promising candidates for data-driven diagnosis include resting-state functional connectivity MRI (rs-fcMRI)-based biomarkers. Although biomarkers have been developed with the aim of diagnosing patients and predicting the efficacy of therapy, the focus has shifted to the identification of biomarkers that represent therapeutic targets, which would allow for more personalized treatment approaches...
October 1, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28912568/intrinsic-neural-network-dysfunction-in-quiescent-crohn-s-disease
#8
Anne K Thomann, Martin Griebe, Philipp A Thomann, Dusan Hirjak, Matthias P Ebert, Kristina Szabo, Wolfgang Reindl, Robert C Wolf
Psychological factors and comorbidities play an important role in inflammatory bowel diseases. Such comorbidity could be associated with a specific neural phenotype. Brain regions associated with emotion regulation and self-referential processing, including areas assigned to the "default mode network" (DMN), could be promising candidates in this regard. We investigated the functional integrity of multiple intrinsic neural networks in remitted patients with Crohn's disease (CD) and sought to establish relationships between neural network connectivity and psychiatric symptoms...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899744/neural-and-metabolic-basis-of-dynamic-resting-state-fmri
#9
REVIEW
Garth J Thompson
Resting state fMRI (rsfMRI) as a technique showed much initial promise for use in psychiatric and neurological diseases where diagnosis and treatment were difficult. To realize this promise, many groups have moved towards examining "dynamic rsfMRI," which relies on the assumption that rsfMRI measurements on short time scales remain relevant to the underlying neural and metabolic activity. Many dynamic rsfMRI studies have demonstrated differences between clinical or behavioral groups beyond what static rsfMRI measured, suggesting a neurometabolic basis...
September 9, 2017: NeuroImage
https://www.readbyqxmd.com/read/28879082/hemodynamic-variability-in-soldiers-with-trauma-implications-for-functional-mri-connectivity-studies
#10
D Rangaprakash, Michael N Dretsch, Wenjing Yan, Jeffrey S Katz, Thomas S Denney, Gopikrishna Deshpande
Functional MRI (fMRI) is an indirect measure of neural activity as a result of the convolution of the hemodynamic response function (HRF) and latent (unmeasured) neural activity. Recent studies have shown variability of HRF across brain regions (intra-subject spatial variability) and between subjects (inter-subject variability). Ignoring this HRF variability during data analysis could impair the reliability of such fMRI results. Using whole-brain resting-state fMRI (rs-fMRI), we employed hemodynamic deconvolution to estimate voxel-wise HRF...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28878279/changes-in-resting-state-cerebral-activity-in-patients-with-hyperthyroidism-a-short-term-follow-up-functional-mr-imaging-study
#11
Bo Liu, Qian Ran, Daihong Liu, Si Zhang, Dong Zhang
To investigate the brain functional abnormality of hyperthyroid patients before and after treatment for one month using resting-state functional magnetic resonance imaging (rs-fMRI). Amplitude of low-frequency fluctuation (ALFF) and seed-based functional connectivity (FC) analysis were performed in 27 new-onset untreated hyperthyroid patients relative to 30 healthy controls. In addition, follow-up data were available for 19 patients treated with methimazole for one month. Compared with healthy controls, patients exhibited lower ALFF in the right posterior cingulate cortex (PCC); increased FC in the bilateral anterior insula (AI), bilateral posterior insula (PI) and left anterior lobe of the cerebellum (ALC); and decreased FC in the bilateral lateral prefrontal cortex (LPFC), the right medial temporal gyrus (MTG) and the bilateral PCC...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28843539/neuroanatomical-foundations-of-delayed-reward-discounting-decision-making
#12
Max M Owens, Joshua C Gray, Michael T Amlung, Assaf Oshri, Lawrence H Sweet, James MacKillop
Resolving tradeoffs between smaller immediate rewards and larger delayed rewards is ubiquitous in daily life and steep discounting of future rewards is associated with several psychiatric conditions. This form of decision-making is referred to as delayed reward discounting (DRD) and the features of brain structure associated with DRD are not well understood. The current study characterized the relationship between gray matter volume (GMV) and DRD in a sample of 1038 healthy adults (54.7% female) using cortical parcellation, subcortical segmentation, and voxelwise cortical surface-based group analyses...
November 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28790433/a-neural-marker-of-obsessive-compulsive-disorder-from-whole-brain-functional-connectivity
#13
Yu Takagi, Yuki Sakai, Giuseppe Lisi, Noriaki Yahata, Yoshinari Abe, Seiji Nishida, Takashi Nakamae, Jun Morimoto, Mitsuo Kawato, Jin Narumoto, Saori C Tanaka
Obsessive-compulsive disorder (OCD) is a common psychiatric disorder with a lifetime prevalence of 2-3%. Recently, brain activity in the resting state is gathering attention for exploring altered functional connectivity in psychiatric disorders. Although previous resting-state functional magnetic resonance imaging studies investigated the neurobiological abnormalities of patients with OCD, there are concerns that should be addressed. One concern is the validity of the hypothesis employed. Most studies used seed-based analysis of the fronto-striatal circuit, despite the potential for abnormalities in other regions...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28766324/resting-state-fmri-and-social-cognition-an-opportunity-to-connect
#14
Alex Doruyter, Nynke A Groenewold, Patrick Dupont, Dan J Stein, James M Warwick
Many psychiatric disorders are characterized by altered social cognition. The importance of social cognition has previously been recognized by the National Institute of Mental Health Research Domain Criteria project, in which it features as a core domain. Social task-based functional magnetic resonance imaging (fMRI) currently offers the most direct insight into how the brain processes social information; however, resting-state fMRI may be just as important in understanding the biology and network nature of social processing...
August 1, 2017: Human Psychopharmacology
https://www.readbyqxmd.com/read/28743861/multimodal-fingerprints-of-resting-state-networks-as-assessed-by-simultaneous-trimodal-mr-pet-eeg-imaging
#15
N J Shah, J Arrubla, R Rajkumar, E Farrher, J Mauler, E Rota Kops, L Tellmann, J Scheins, F Boers, J Dammers, P Sripad, C Lerche, K J Langen, H Herzog, I Neuner
Simultaneous MR-PET-EEG (magnetic resonance imaging - positron emission tomography - electroencephalography), a new tool for the investigation of neuronal networks in the human brain, is presented here for the first time. It enables the assessment of molecular metabolic information with high spatial and temporal resolution in a given brain simultaneously. Here, we characterize the brain's default mode network (DMN) in healthy male subjects using multimodal fingerprinting by quantifying energy metabolism via 2- [(18)F]fluoro-2-desoxy-D-glucose PET (FDG-PET), the inhibition - excitation balance of neuronal activation via magnetic resonance spectroscopy (MRS), its functional connectivity via fMRI and its electrophysiological signature via EEG...
July 25, 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
#16
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/28717223/investigation-of-the-changes-in-the-power-distribution-in-resting-state-brain-networks-associated-with-pure-conduct-disorder
#17
Jiang Zhang, Jiansong Zhou, Fengmei Lu, Liangyin Chen, Yunzhi Huang, Huafu Chen, Yutao Xiang, Gang Yang, Zhen Yuan
Conduct disorder (CD) is a psychiatric disorder in children and adolescence. To investigate changes in the power distribution in brain networks between CD and typically developing (TD) groups, resting-state functional magnetic resonance imaging (rsfMRI) data of thirty-six subjects were first recorded, and then the data were preprocessed using DPARSF and SPM8. Meanwhile, the power of the blood oxygenation level-dependent (BOLD) signals of ninety brain regions was acquired using the integral of the Welch power spectral density (PSD)...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716961/structural-basis-of-large-scale-functional-connectivity-in-the-mouse
#18
Joanes Grandjean, Valerio Zerbi, Joshua Henk Balsters, Nicole Wenderoth, Markus Rudin
Translational neuroimaging requires approaches and techniques that can bridge between multiple different species and disease states. One candidate method that offers insights into the brain's functional connectivity (FC) is resting-state fMRI (rs-fMRI). In both humans and nonhuman primates, patterns of FC (often referred to as the functional connectome) have been related to the underlying structural connectivity (SC; also called the structural connectome). Given the recent rise in preclinical neuroimaging of mouse models, it is an important question whether the mouse functional connectome conforms to the underlying SC...
August 23, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28705767/common-and-distinct-dysfunctional-patterns-contribute-to-triple-network-model-in-schizophrenia-and-depression-a-preliminary-study
#19
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
https://www.readbyqxmd.com/read/28678737/functional-brain-mri-in-patients-complaining-of-electrohypersensitivity-after-long-term-exposure-to-electromagnetic-fields
#20
Gunnar Heuser, Sylvia A Heuser
INTRODUCTION: Ten adult patients with electromagnetic hypersensitivity underwent functional magnetic resonance imaging (fMRI) brain scans. All scans were abnormal with abnormalities which were consistent and similar. It is proposed that fMRI brain scans be used as a diagnostic aid for determining whether or not a patient has electromagnetic hypersensitivity. Over the years we have seen an increasing number of patients who had developed multi system complaints after long term repeated exposure to electromagnetic fields (EMFs)...
September 26, 2017: Reviews on Environmental Health
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