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Resting state functional connectivity psychiatry

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https://www.readbyqxmd.com/read/28483719/multi-echo-epi-of-human-fear-conditioning-reveals-improved-bold-detection-in-ventromedial-prefrontal-cortex
#1
Brice Fernandez, Laura Leuchs, Philipp G Sämann, Michael Czisch, Victor I Spoormaker
Standard T2(*) weighted functional magnetic resonance imaging (fMRI) performed with echo-planar imaging (EPI) suffers from signal loss in the ventromedial prefrontal cortex (vmPFC) due to macroscopic field inhomogeneity. However, this region is of special interest to affective neuroscience and psychiatry. The Multi-echo EPI (MEPI) approach has several advantages over EPI but its performance against EPI in the vmPFC has not yet been examined in a study with sufficient statistical power using a task specifically eliciting activity in this region...
May 5, 2017: NeuroImage
https://www.readbyqxmd.com/read/28447622/modern-clinical-research-on-lsd
#2
REVIEW
Matthias E Liechti
All modern clinical studies using the classic hallucinogen lysergic acid diethylamide (LSD) in healthy subjects or patients in the last 25 years are reviewed herein. There were five recent studies in healthy participants and one in patients. In a controlled setting, LSD acutely induced bliss, audiovisual synesthesia, altered meaning of perceptions, derealization, depersonalization, and mystical experiences. These subjective effects of LSD were mediated by the 5-HT2A receptor. LSD increased feelings of closeness to others, openness, trust, and suggestibility...
April 27, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28367127/alterations-of-intrinsic-brain-connectivity-patterns-in-depression-and-bipolar-disorders-a-critical-assessment-of-magnetoencephalography-based-evidence
#3
REVIEW
Golnoush Alamian, Ana-Sofía Hincapié, Etienne Combrisson, Thomas Thiery, Véronique Martel, Dmitrii Althukov, Karim Jerbi
Despite being the object of a thriving field of clinical research, the investigation of intrinsic brain network alterations in psychiatric illnesses is still in its early days. Because the pathological alterations are predominantly probed using functional magnetic resonance imaging (fMRI), many questions about the electrophysiological bases of resting-state alterations in psychiatric disorders, particularly among mood disorder patients, remain unanswered. Alongside important research using electroencephalography (EEG), the specific recent contributions and future promise of magnetoencephalography (MEG) in this field are not fully recognized and valued...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/28265121/brain-structural-and-functional-signatures-of-impulsive-compulsive-behaviours-in-parkinson-s-disease
#4
F Imperiale, F Agosta, E Canu, V Markovic, A Inuggi, M Jecmenica-Lukic, A Tomic, M Copetti, S Basaia, V S Kostic, M Filippi
This study assessed brain structural and functional alterations in patients with Parkinson's disease and impulsive-compulsive behaviours (PD-ICB) compared with controls and PD no-ICB cases. Eighty-five PD patients (35 PD-ICB) and 50 controls were recruited. All subjects underwent three-dimensional T1-weighted, diffusion tensor (DT), and resting state functional magnetic resonance imaging (RS fMRI). We assessed cortical thickness with surface-based morphometry, subcortical volumes using FIRST, DT MRI metrics using region of interest and tractography approaches, and RS fMRI using a model free approach...
March 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28167837/neural-mechanisms-of-mismatch-negativity-dysfunction-in-schizophrenia
#5
M Lee, P Sehatpour, M J Hoptman, P Lakatos, E C Dias, J T Kantrowitz, A M Martinez, D C Javitt
Schizophrenia is associated with cognitive deficits that reflect impaired cortical information processing. Mismatch negativity (MMN) indexes pre-attentive information processing dysfunction at the level of primary auditory cortex. This study investigates mechanisms underlying MMN impairments in schizophrenia using event-related potential, event-related spectral decomposition (ERSP) and resting state functional connectivity (rsfcMRI) approaches. For this study, MMN data to frequency, intensity and duration-deviants were analyzed from 69 schizophrenia patients and 38 healthy controls...
February 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28093566/estrogen-dependent-association-of-hdac4-with-fear-in-female-mice-and-women-with-ptsd
#6
S A Maddox, V Kilaru, J Shin, T Jovanovic, L M Almli, B G Dias, S D Norrholm, N Fani, V Michopoulos, Z Ding, K N Conneely, E B Binder, K J Ressler, A K Smith
Women are at increased risk of developing post-traumatic stress disorder (PTSD) following a traumatic event. Recent studies suggest that this may be mediated, in part, by circulating estrogen levels. This study evaluated the hypothesis that individual variation in response to estrogen levels contributes to fear regulation and PTSD risk in women. We evaluated DNA methylation from blood of female participants in the Grady Trauma Project and found that serum estradiol levels associates with DNA methylation across the genome...
January 17, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/27918562/resting-state-connectivity-biomarkers-define-neurophysiological-subtypes-of-depression
#7
Andrew T Drysdale, Logan Grosenick, Jonathan Downar, Katharine Dunlop, Farrokh Mansouri, Yue Meng, Robert N Fetcho, Benjamin Zebley, Desmond J Oathes, Amit Etkin, Alan F Schatzberg, Keith Sudheimer, Jennifer Keller, Helen S Mayberg, Faith M Gunning, George S Alexopoulos, Michael D Fox, Alvaro Pascual-Leone, Henning U Voss, B J Casey, Marc J Dubin, Conor Liston
Biomarkers have transformed modern medicine but remain largely elusive in psychiatry, partly because there is a weak correspondence between diagnostic labels and their neurobiological substrates. Like other neuropsychiatric disorders, depression is not a unitary disease, but rather a heterogeneous syndrome that encompasses varied, co-occurring symptoms and divergent responses to treatment. By using functional magnetic resonance imaging (fMRI) in a large multisite sample (n = 1,188), we show here that patients with depression can be subdivided into four neurophysiological subtypes ('biotypes') defined by distinct patterns of dysfunctional connectivity in limbic and frontostriatal networks...
January 2017: Nature Medicine
https://www.readbyqxmd.com/read/27784534/toward-understanding-thalamocortical-dysfunction-in-schizophrenia-through-computational-models-of-neural-circuit-dynamics
#8
REVIEW
John D Murray, Alan Anticevic
The thalamus is implicated in the neuropathology of schizophrenia, and multiple modalities of noninvasive neuroimaging provide converging evidence for altered thalamocortical dynamics in the disorder, such as functional connectivity and oscillatory power. However, it remains a challenge to link these neuroimaging biomarkers to underlying neural circuit mechanisms. One potential path forward is a "Computational Psychiatry" approach that leverages computational models of neural circuits to make predictions for the dynamical impact dynamical impact on specific thalamic disruptions hypothesized to occur in the pathophysiology of schizophrenia...
February 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/27090303/intrinsic-functional-connectivity-in-late-life-depression-trajectories-over-the-course-of-pharmacotherapy-in-remitters-and-non-remitters
#9
H T Karim, C Andreescu, D Tudorascu, S F Smagula, M A Butters, J F Karp, C Reynolds, H J Aizenstein
Previous studies in late-life depression (LLD) have found that patients have altered intrinsic functional connectivity in the dorsal default mode network (DMN) and executive control network (ECN). We aimed to detect connectivity differences across a treatment trial among LLD patients as a function of remission status. LLD patients (N=37) were enrolled into a 12-week trial of venlafaxine and underwent five functional magnetic resonance imaging resting state scans during treatment. Patients had no history of drug abuse, psychosis, dementia/neurodegenerative diseases or medical conditions with known effects on mood...
March 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/26901357/personalized-medicine-review-and-perspectives-of-promising-baseline-eeg-biomarkers-in-major-depressive-disorder-and-attention-deficit-hyperactivity-disorder
#10
REVIEW
Sebastian Olbrich, Rik van Dinteren, Martijn Arns
Personalized medicine in psychiatry is in need of biomarkers that resemble central nervous system function at the level of neuronal activity. Electroencephalography (EEG) during sleep or resting-state conditions and event-related potentials (ERPs) have not only been used to discriminate patients from healthy subjects, but also for the prediction of treatment outcome in various psychiatric diseases, yielding information about tailored therapy approaches for an individual. This review focuses on baseline EEG markers for two psychiatric conditions, namely major depressive disorder and attention deficit hyperactivity disorder...
2015: Neuropsychobiology
https://www.readbyqxmd.com/read/26888415/distinct-neurobiological-signatures-of-brain-connectivity-in-depression-subtypes-during-natural-viewing-of-emotionally-salient-films
#11
C C Guo, M P Hyett, V T Nguyen, G B Parker, M J Breakspear
BACKGROUND: Establishing an evidence-based diagnostic system informed by the biological (dys)function of the nervous system is a major priority in psychiatry. This objective, however, is often challenged by difficulties in identifying homogeneous clinical populations. Melancholia, a biological and endogenous subtype for major depressive disorder, presents a canonical test case in the search of biological nosology. METHOD: We employed a unique combination of naturalistic functional magnetic resonance imaging (fMRI) paradigms - resting state and free viewing of emotionally salient films - to search for neurobiological signatures of depression subtypes...
May 2016: Psychological Medicine
https://www.readbyqxmd.com/read/26830141/midbrain-functional-connectivity-and-ventral-striatal-dopamine-d2-type-receptors-link-to-impulsivity-in-methamphetamine-users
#12
M Kohno, K Okita, A M Morales, C L Robertson, A C Dean, D G Ghahremani, F W Sabb, R A Rawson, M A Mandelkern, R M Bilder, E D London
Stimulant use disorders are associated with deficits in striatal dopamine receptor availability, abnormalities in mesocorticolimbic resting-state functional connectivity (RSFC) and impulsivity. In methamphetamine-dependent research participants, impulsivity is correlated negatively with striatal D2-type receptor availability, and mesocorticolimbic RSFC is stronger than that in controls. The extent to which these features of methamphetamine dependence are interrelated, however, is unknown. This question was addressed in two studies...
November 2016: Molecular Psychiatry
https://www.readbyqxmd.com/read/26552591/inflammation-is-associated-with-decreased-functional-connectivity-within-corticostriatal-reward-circuitry-in-depression
#13
J C Felger, Z Li, E Haroon, B J Woolwine, M Y Jung, X Hu, A H Miller
Depression is associated with alterations in corticostriatal reward circuitry. One pathophysiological pathway that may drive these changes is inflammation. Biomarkers of inflammation (for example, cytokines and C-reactive protein (CRP)) are reliably elevated in depressed patients. Moreover, administration of inflammatory stimuli reduces neural activity and dopamine release in reward-related brain regions in association with reduced motivation and anhedonia. Accordingly, we examined whether increased inflammation in depression affects corticostriatal reward circuitry to lead to deficits in motivation and goal-directed motor behavior...
October 2016: Molecular Psychiatry
https://www.readbyqxmd.com/read/26416545/dimensional-depression-severity-in-women-with-major-depression-and-post-traumatic-stress-disorder-correlates-with-fronto-amygdalar-hypoconnectivty
#14
T D Satterthwaite, P A Cook, S E Bruce, C Conway, E Mikkelsen, E Satchell, S N Vandekar, T Durbin, R T Shinohara, Y I Sheline
Depressive symptoms are common in multiple psychiatric disorders and are frequent sequelae of trauma. A dimensional conceptualization of depression suggests that symptoms should be associated with a continuum of deficits in specific neural circuits. However, most prior investigations of abnormalities in functional connectivity have typically focused on a single diagnostic category using hypothesis-driven seed-based analyses. Here, using a sample of 105 adult female participants from three diagnostic groups (healthy controls, n=17; major depression, n=38; and post-traumatic stress disorder, n=50), we examine the dimensional relationship between resting-state functional dysconnectivity and severity of depressive symptoms across diagnostic categories using a data-driven analysis (multivariate distance-based matrix regression)...
July 2016: Molecular Psychiatry
https://www.readbyqxmd.com/read/26260493/brain-connectomics-predict-response-to-treatment-in-social-anxiety-disorder
#15
S Whitfield-Gabrieli, S S Ghosh, A Nieto-Castanon, Z Saygin, O Doehrmann, X J Chai, G O Reynolds, S G Hofmann, M H Pollack, J D E Gabrieli
We asked whether brain connectomics can predict response to treatment for a neuropsychiatric disorder better than conventional clinical measures. Pre-treatment resting-state brain functional connectivity and diffusion-weighted structural connectivity were measured in 38 patients with social anxiety disorder (SAD) to predict subsequent treatment response to cognitive behavioral therapy (CBT). We used a priori bilateral anatomical amygdala seed-driven resting connectivity and probabilistic tractography of the right inferior longitudinal fasciculus together with a data-driven multivoxel pattern analysis of whole-brain resting-state connectivity before treatment to predict improvement in social anxiety after CBT...
May 2016: Molecular Psychiatry
https://www.readbyqxmd.com/read/26033240/connectome-wide-network-analysis-of-youth-with-psychosis-spectrum-symptoms
#16
T D Satterthwaite, S N Vandekar, D H Wolf, D S Bassett, K Ruparel, Z Shehzad, R C Craddock, R T Shinohara, T M Moore, E D Gennatas, C Jackson, D R Roalf, M P Milham, M E Calkins, H Hakonarson, R C Gur, R E Gur
Adults with psychotic disorders have dysconnectivity in critical brain networks, including the default mode (DM) and the cingulo-opercular (CO) networks. However, it is unknown whether such deficits are present in youth with less severe symptoms. We conducted a multivariate connectome-wide association study examining dysconnectivity with resting state functional magnetic resonance imaging in a population-based cohort of 188 youths aged 8-22 years with psychosis-spectrum (PS) symptoms and 204 typically developing (TD) comparators...
December 2015: Molecular Psychiatry
https://www.readbyqxmd.com/read/25753600/discrimination-of-schizophrenia-auditory-hallucinators-by-machine-learning-of-resting-state-functional-mri
#17
Darya Chyzhyk, Manuel Graña, Döst Öngür, Ann K Shinn
Auditory hallucinations (AH) are a symptom that is most often associated with schizophrenia, but patients with other neuropsychiatric conditions, and even a small percentage of healthy individuals, may also experience AH. Elucidating the neural mechanisms underlying AH in schizophrenia may offer insight into the pathophysiology associated with AH more broadly across multiple neuropsychiatric disease conditions. In this paper, we address the problem of classifying schizophrenia patients with and without a history of AH, and healthy control (HC) subjects...
May 2015: International Journal of Neural Systems
https://www.readbyqxmd.com/read/25155877/glutathione-deficit-impairs-myelin-maturation-relevance-for-white-matter-integrity-in-schizophrenia-patients
#18
A Monin, P S Baumann, A Griffa, L Xin, R Mekle, M Fournier, C Butticaz, M Klaey, J H Cabungcal, P Steullet, C Ferrari, M Cuenod, R Gruetter, J P Thiran, P Hagmann, P Conus, K Q Do
Schizophrenia pathophysiology implies both abnormal redox control and dysconnectivity of the prefrontal cortex, partly related to oligodendrocyte and myelin impairments. As oligodendrocytes are highly vulnerable to altered redox state, we investigated the interplay between glutathione and myelin. In control subjects, multimodal brain imaging revealed a positive association between medial prefrontal glutathione levels and both white matter integrity and resting-state functional connectivity along the cingulum bundle...
July 2015: Molecular Psychiatry
https://www.readbyqxmd.com/read/25092248/a-functional-mri-marker-may-predict-the-outcome-of-electroconvulsive-therapy-in-severe-and-treatment-resistant-depression
#19
J A van Waarde, H S Scholte, L J B van Oudheusden, B Verwey, D Denys, G A van Wingen
Electroconvulsive therapy (ECT) is effective even in treatment-resistant patients with major depression. Currently, there are no markers available that can assist in identifying those patients most likely to benefit from ECT. In the present study, we investigated whether resting-state network connectivity can predict treatment outcome for individual patients. We included forty-five patients with severe and treatment-resistant unipolar depression and collected functional magnetic resonance imaging scans before the course of ECT...
May 2015: Molecular Psychiatry
https://www.readbyqxmd.com/read/23774715/the-autism-brain-imaging-data-exchange-towards-a-large-scale-evaluation-of-the-intrinsic-brain-architecture-in-autism
#20
A Di Martino, C-G Yan, Q Li, E Denio, F X Castellanos, K Alaerts, J S Anderson, M Assaf, S Y Bookheimer, M Dapretto, B Deen, S Delmonte, I Dinstein, B Ertl-Wagner, D A Fair, L Gallagher, D P Kennedy, C L Keown, C Keysers, J E Lainhart, C Lord, B Luna, V Menon, N J Minshew, C S Monk, S Mueller, R-A Müller, M B Nebel, J T Nigg, K O'Hearn, K A Pelphrey, S J Peltier, J D Rudie, S Sunaert, M Thioux, J M Tyszka, L Q Uddin, J S Verhoeven, N Wenderoth, J L Wiggins, S H Mostofsky, M P Milham
Autism spectrum disorders (ASDs) represent a formidable challenge for psychiatry and neuroscience because of their high prevalence, lifelong nature, complexity and substantial heterogeneity. Facing these obstacles requires large-scale multidisciplinary efforts. Although the field of genetics has pioneered data sharing for these reasons, neuroimaging had not kept pace. In response, we introduce the Autism Brain Imaging Data Exchange (ABIDE)-a grassroots consortium aggregating and openly sharing 1112 existing resting-state functional magnetic resonance imaging (R-fMRI) data sets with corresponding structural MRI and phenotypic information from 539 individuals with ASDs and 573 age-matched typical controls (TCs; 7-64 years) (http://fcon_1000...
June 2014: Molecular Psychiatry
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