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Bipolar disorder fmri

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https://www.readbyqxmd.com/read/29782956/attentional-engagement-increases-inferior-frontal-gyrus-activity-and-mutes-limbic-activity-in-pediatric-bipolar-disorder-meta-analyses-of-fmri-studies
#1
Moon-Soo Lee, Purnima Anumagalla, Prasanth Talluri, Mani N Pavuluri
OBJECTIVES: Attentional deficit has been shown to exist in adult and pediatric bipolar disorder across the life span. Given that emotional dysregulation is central to bipolar disorder, this study hypothesizes that emotional circuitry regions are altered along with anomalies in the attentional systems during cognitive deployment in bipolar disorder. METHODS: An activation likelihood estimation meta-analysis of attentional activities using GingerALE software was completed for adult and pediatric bipolar disorder populations in all published studies till December 2017...
May 18, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29759944/testing-assumptions-on-prefrontal-transcranial-direct-current-stimulation-comparison-of-electrode-montages-using-multimodal-fmri
#2
Jana Wörsching, Frank Padberg, Stephan Goerigk, Irmgard Heinz, Christine Bauer, Christian Plewnia, Alkomiet Hasan, Birgit Ertl-Wagner, Daniel Keeser
BACKGROUND: Transcranial direct current stimulation (tDCS) of the prefrontal cortex (PFC) has been widely applied in cognitive neurosciences and advocated as a therapeutic intervention, e.g. in major depressive disorder. Although several targets and protocols have been suggested, comparative studies of tDCS parameters, particularly electrode montages and their cortical targets, are still lacking. OBJECTIVE: This study investigated a priori hypotheses on specific effects of prefrontal-tDCS montages by using multimodal functional magnetic resonance imaging (fMRI) in healthy participants...
May 4, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29751242/local-functional-connectivity-alterations-in-schizophrenia-bipolar-disorder-and-major-depressive-disorder
#3
Yange Wei, Miao Chang, Fay Y Womer, Qian Zhou, Zhiyang Yin, Shengnan Wei, Yifang Zhou, Xiaowei Jiang, Xudong Yao, Jia Duan, Ke Xu, Xi-Nian Zuo, Yanqing Tang, Fei Wang
BACKGROUND: Local functional connectivity (FC) indicates local or short-distance functional interactions and may serve as a neuroimaging marker to investigate the human brain connectome. Local FC alterations suggest a disrupted balance in the local functionality of the whole brain network and are increasingly implicated in schizophrenia (SZ), bipolar disorder (BD), and major depressive disorder (MDD). METHODS: We aim to examine the similarities and differences in the local FC across SZ, BD, and MDD...
April 10, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29748770/a-systematic-review-of-associations-between-functional-mri-activity-and-polygenic-risk-for-schizophrenia-and-bipolar-disorder
#4
REVIEW
Zalina Dezhina, Siri Ranlund, Marinos Kyriakopoulos, Steve C R Williams, Danai Dima
Genetic factors account for up to 80% of the liability for schizophrenia (SCZ) and bipolar disorder (BD). Genome-wide association studies have successfully identified several genes associated with increased risk for both disorders. This has allowed researchers to model the aggregate effect of genes associated with disease status and create a polygenic risk score (PGRS) for each individual. The interest in imaging genetics using PGRS has grown in recent years, with several studies now published. We have conducted a systematic review to examine the effects of PGRS of SCZ, BD and cross psychiatric disorders on brain function and connectivity using fMRI data...
May 10, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29673379/erythropoietin-as-an-add-on-treatment-for-cognitive-side-effects-of-electroconvulsive-therapy-a-study-protocol-for-a-randomized-controlled-trial
#5
Lejla Sjanic Schmidt, Jeff Zarp Petersen, Maj Vinberg, Ida Hageman, Niels Vidiendal Olsen, Lars Vedel Kessing, Martin Balslev Jørgensen, Kamilla Woznica Miskowiak
BACKGROUND: Electroconvulsive therapy (ECT) is the most effective treatment for severe depression, but its use is impeded by its cognitive side effects. Novel treatments that can counteract these side effects may therefore improve current treatment strategies for depression. The present randomized trial investigates (1) whether short-term add-on treatment with erythropoietin (EPO) can reduce the cognitive side -effects of ECT and (2) whether such effects are long-lasting. Further, structural and functional magnetic resonance imaging (MRI) will be used to explore the neural underpinnings of such beneficial effects of EPO...
April 19, 2018: Trials
https://www.readbyqxmd.com/read/29672741/multimodal-brain-changes-in-first-episode-mania-a-voxel-based-morphometry-functional-magnetic-resonance-imaging-and-connectivity-study
#6
José M Goikolea, Danai Dima, Ramón Landín-Romero, Imma Torres, Giuseppe DelVecchio, Marc Valentí, Benedikt L Amann, Caterina Mar Bonnín, Peter J McKenna, Edith Pomarol-Clotet, Sophia Frangou, Eduard Vieta
Background: Brain structural and functional changes in bipolar disorder (BD) are well-established findings, but it is uncertain whether these changes are already present in first episode mania (FEM). Methods: We compared 31 FEM subjects, with 31 healthy individuals matched for age, sex, and premorbid IQ. Whole-brain voxel-wise morphometry, functional magnetic resonance imaging during the n-back task, and a functional connectivity analysis were performed. Results: There were no volumetric differences between the 2 groups...
April 17, 2018: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29601896/differentiating-between-bipolar-and-unipolar-depression-in-functional-and-structural-mri-studies
#7
REVIEW
Kyu-Man Han, Domenico De Berardis, Michele Fornaro, Yong-Ku Kim
Distinguishing depression in bipolar disorder (BD) from unipolar depression (UD) solely based on clinical clues is difficult, which has led to the exploration of promising neural markers in neuroimaging measures for discriminating between BD depression and UD. In this article, we review structural and functional magnetic resonance imaging (MRI) studies that directly compare UD and BD depression based on neuroimaging modalities including functional MRI studies on regional brain activation or functional connectivity, structural MRI on gray or white matter morphology, and pattern classification analyses using a machine learning approach...
March 27, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29580768/functional-connectivity-between-anterior-insula-and-key-nodes-of-frontoparietal-executive-control-and-salience-networks-distinguish-bipolar-depression-from-unipolar-depression-and-healthy-control-subjects
#8
Kristen K Ellard, Jared P Zimmerman, Navneet Kaur, Koene R A Van Dijk, Joshua L Roffman, Andrew A Nierenberg, Darin D Dougherty, Thilo Deckersbach, Joan A Camprodon
BACKGROUND: Patients with bipolar depression are characterized by dysregulation across the full spectrum of mood, differentiating them from patients with unipolar depression. The ability to switch neural resources among the default mode network, salience network, and executive control network (ECN) has been proposed as a key mechanism for adaptive mood regulation. The anterior insula is implicated in the modulation of functional network switching. Differential connectivity between anterior insula and functional networks may provide insights into pathophysiological differences between bipolar and unipolar mood disorders, with implications for diagnosis and treatment...
February 7, 2018: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/29522938/factor-analysis-of-regional-brain-activation-in-bipolar-and-healthy-individuals-reveals-a-consistent-modular-structure
#9
David E Fleck, Jeffrey A Welge, James C Eliassen, Caleb M Adler, Melissa P DelBello, Stephen M Strakowski
BACKGROUND: The neurophysiological substrates of cognition and emotion, as seen with fMRI, are generally explained using modular structures. The present study was designed to probe the modular structure of cognitive-emotional processing in bipolar and healthy individuals using factor analysis and compare the results with current conceptions of the neurophysiology of bipolar disorder. METHODS: Exploratory factor analysis was used to assess patterns of covariation among brain regions-of-interest activated during the Continuous Performance Task with Emotional and Neutral Distractors in healthy and bipolar individuals without a priori constraints on the number or composition of latent factors...
July 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29466722/shared-and-distinct-regional-homogeneity-changes-in-bipolar-and-unipolar-depression
#10
Xudong Yao, Zhiyang Yin, Fang Liu, Shengnan Wei, Yifang Zhou, Xiaowei Jiang, Yange Wei, Ke Xu, Fei Wang, Yanqing Tang
BACKGROUND: Bipolar depression (BD) is easily misdiagnosed as unipolar depression (UD) or major depressive disorder (MDD) because the depressive symptoms can overlap. Regional homogeneity (ReHo), a measure commonly used for analyzing resting-state fMRI data, has been applied to the study of various neuropsychiatric disorders. However, to date, studies directly comparing BD and UD using ReHo have been relatively scarce. Further investigation is needed to study the latent pathophysiological mechanisms of BD and UD...
April 23, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29451300/decreased-anterior-cingulate-activation-in-a-motor-task-in-youths-with-bipolar-disorder
#11
Jace B King, Jeffrey S Anderson, Deborah A Yurgelun-Todd, Punitha Subramaniam, Marie R Ehrler, Melissa P Lopez-Larson
BACKGROUND: Bipolar disorder (BP) is characterized by abnormal shifts in mood between episodes of mania and severe depression, both of which have been linked with psychomotor disturbances. This study compares brain activation patterns in motor networks between euthymic youths with BP and healthy controls (HC) during the completion of a simple motor task. METHODS: Thirty-five youths with BP and 35 HC (aged 10-19) completed a self-paced sequential bilateral finger-tapping task, consisting of a 4-minute scan block with alternating 20-second periods of either the tapping task (six blocks) or rest (six blocks), while undergoing functional magnetic resonance imaging...
February 16, 2018: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/29441653/cognitive-control-under-stressful-conditions-in-transitional-age-youth-with-bipolar-disorder-diagnostic-and-sleep-related-differences-in-fronto-limbic-activation-patterns
#12
Adriane M Soehner, Tina R Goldstein, Sarah M Gratzmiller, Mary L Phillips, Peter L Franzen
OBJECTIVES: Adults with bipolar disorder (BD) display aberrant activation in fronto-limbic neural circuitry during cognitive control. However, fronto-limbic response to cognitive control, and factors destabilizing this circuitry, remain under-studied during the transition from adolescence to young adulthood in BD. Sleep patterns are disturbed in BD, undergo change in adolescence, and support brain function. Among transitional age youth, BD diagnosis and sleep (duration and variability) were tested as predictors of fronto-limbic response to a stressful cognitive control task...
February 13, 2018: Bipolar Disorders
https://www.readbyqxmd.com/read/29430790/altered-frontal-amygdala-effective-connectivity-during-effortful-emotion-regulation-in-bipolar-disorder
#13
Liwen Zhang, Esther M Opmeer, Lisette van der Meer, André Aleman, Branislava Ćurčić-Blake, Henricus G Ruhé
OBJECTIVES: Sufficient prefrontal top-down control of limbic affective areas, especially the amygdala, is essential for successful effortful emotion regulation (ER). Difficulties in effortful ER have been seen in patients with bipolar disorder (BD), which could be suggestive of a disturbed prefrontal-amygdala regulation circuit. The aim of this study was to investigate whether BD patients show abnormal effective connectivity from the prefrontal areas to the amygdala during effortful ER (reappraisal)...
February 11, 2018: Bipolar Disorders
https://www.readbyqxmd.com/read/29398207/effective-connectivity-within-a-triple-network-brain-system-discriminates-schizophrenia-spectrum-disorders-from-psychotic-bipolar-disorder-at-the-single-subject-level
#14
Lena Palaniyappan, Gopikrishna Deshpande, Pradyumna Lanka, D Rangaprakash, Sarina Iwabuchi, Susan Francis, Peter F Liddle
OBJECTIVE: Schizophrenia spectrum disorders (SSD) and psychotic bipolar disorder share a number of genetic and neurobiological features, despite a divergence in clinical course and outcome trajectories. We studied the diagnostic classification potential that can be achieved on the basis of the structure and connectivity within a triple network system (the default mode, salience and central executive network) in patients with SSD and psychotic bipolar disorder. METHODS: Directed static connectivity and its dynamic variance was estimated among 8 nodes of the three large-scale networks...
February 2, 2018: Schizophrenia Research
https://www.readbyqxmd.com/read/29331931/resting-state-fmri-signals-in-offspring-of-parents-with-bipolar-disorder-at-the-high-risk-and-ultra-high-risk-stages-and-their-relations-with-cognitive-function
#15
Kangguang Lin, Robin Shao, Rui Lu, Kun Chen, Weicong Lu, Ting Li, Jiehua Kong, Kwok-Fai So, Guiyun Xu
BACKGROUND: Bipolar disorder (BD) has been associated with dysfunctional resting-state brain functioning. However, it is still not known whether the aberrant functioning occurs and predict cognitive functioning before illness onset. AIMS: We examined the resting-state regional and network dysfunctioning, and their correlates with neurocognitive performance, in the high-risk (HR) and ultra-high-risk (UHR) stages of bipolar disorder. METHODS: Using amplitude of low-frequency fluctuations (ALFF), region homogeneity (ReHo) and hypothesis-driven region-of-interest (ROI)-based connectivity, we examined resting-state fMRI data of 8- to 25-year-old healthy offspring (HR, n = 28) and offspring with subthreshold syndromes (UHR, n = 22) of a BD parent, and age-matched healthy controls without any personal or family psychopathology (HC, n = 46)...
March 2018: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29331692/memory-performance-predicts-response-to-psychotherapy-for-depression-in-bipolar-disorder-a-pilot-randomized-controlled-trial-with-exploratory-functional-magnetic-resonance-imaging
#16
Thilo Deckersbach, Amy T Peters, Conor Shea, Aishwarya Gosai, Jonathan P Stange, Andrew D Peckham, Kristen K Ellard, Michael W Otto, Scott L Rauch, Darin D Dougherty, Andrew A Nierenberg
OBJECTIVE: This pilot randomized controlled trial compared Cognitive Behavior Therapy (CBT) and Supportive Psychotherapy (SP) for the treatment of depression in bipolar I disorder. We also examined whether exploratory verbal memory, executive functioning, and neural correlates of verbal memory during functional magnetic resonance imaging (fMRI) predicted change in depression severity. METHODS: Thirty-two adults (ages 18-65) with DSM-IV bipolar I disorder meeting current criteria for a major depressive episode were randomized to 18 weeks of CBT or SP...
March 15, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29232968/altered-cerebellar-functional-connectivity-in-remitted-bipolar-disorder-a-resting-state-functional-magnetic-resonance-imaging-study
#17
Ying Wang, Shuming Zhong, Guanmao Chen, Tao Liu, Lianping Zhao, Yao Sun, Yanbin Jia, Li Huang
OBJECTIVES: Several recent studies have reported a strong association between the cerebellar structural and functional abnormalities and psychiatric disorders. However, there are no studies to investigate possible changes in cerebellar functional connectivity in bipolar disorder. This study aimed to examine the whole-brain functional connectivity pattern of patients with remitted bipolar disorder II, in particular in the cerebellum. METHODS: A total of 25 patients with remitted bipolar disorder II and 25 controls underwent resting-state functional magnetic resonance imaging and neuropsychological tests...
December 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/29232965/structural-and-functional-changes-in-the-somatosensory-cortex-in-euthymic-females-with-bipolar-disorder
#18
Luciano Minuzzi, Sabrina K Syan, Mara Smith, Alexander Hall, Geoffrey Bc Hall, Benicio N Frey
OBJECTIVE: Current evidence from neuroimaging data suggests possible dysfunction of the fronto-striatal-limbic circuits in individuals with bipolar disorder. Somatosensory cortical function has been implicated in emotional recognition, risk-taking and affective responses through sensory modalities. This study investigates anatomy and function of the somatosensory cortex in euthymic bipolar women. METHODS: In total, 68 right-handed euthymic women (bipolar disorder = 32 and healthy controls = 36) between 16 and 45 years of age underwent high-resolution anatomical and functional magnetic resonance imaging during the mid-follicular menstrual phase...
December 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/29079138/a-homer-1-gene-variant-influences-brain-structure-and-function-lithium-effects-on-white-matter-and-antidepressant-response-in-bipolar-disorder-a-multimodal-genetic-imaging-study
#19
Francesco Benedetti, Sara Poletti, Clara Locatelli, Elena Mazza, Cristina Lorenzi, Alice Vitali, Martina Riberto, Silvia Brioschi, Benedetta Vai, Irene Bollettini, Elisa Melloni, Veronica Aggio, Andrea Falini, Andrea De Bartolomeis, Cristina Colombo
BACKGROUND: The Homer family of postsynaptic scaffolding proteins plays a crucial role in glutamate-mediated synaptic plasticity, a phenotype associated with Bipolar Disorder (BD). Homer is a target for antidepressants and mood stabilizers. The AA risk genotype of the Homer rs7713917 A>G SNP has been associated with mood disorders and suicide, and in healthy humans with brain function. Despite the evidence linking Homer 1 gene and function to mood disorder, as well as its involvement in animal models of depression, no study has yet investigated the role of Homer in bipolar depression and treatment response...
February 2, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29024194/disrupted-cortico-limbic-connectivity-during-reward-processing-in-remitted-bipolar-i-disorder
#20
Sunny J Dutra, Vincent Man, Hedy Kober, William A Cunningham, June Gruber
OBJECTIVES: Bipolar disorder (BD) is associated with elevated reward sensitivity and persistent positive affect, yet the neural mechanisms underlying these patterns are not well understood. In the present study, we examined putative disruptions in communication within a well-known cortico-limbic reward circuit during reward processing as a potential contributing mechanism to these symptoms. METHODS: The present investigation employed a within- and between-subjects design utilizing a monetary and social incentive delay task among adults with bipolar disorder type I (BD; N = 24) and a healthy non-psychiatric control group (HC; N = 25) during functional magnetic resonance imaging (fMRI)...
December 2017: Bipolar Disorders
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