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Ventromedial prefrontal cortex

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https://www.readbyqxmd.com/read/28436445/cortical-thickness-and-subcortical-gray-matter-volume-in-pediatric-anxiety-disorders
#1
Andrea L Gold, Elizabeth R Steuber, Lauren K White, Jennifer Pacheco, Jessica F Sachs, David Pagliaccio, Erin Berman, Ellen Leibenluft, Daniel S Pine
Perturbations in the prefrontal cortex (PFC), hippocampus, and amygdala are implicated in the development of anxiety disorders. However, most structural neuroimaging studies of patients with anxiety disorders utilize adult samples, and the few studies in youths examine small samples, primarily with volume-based measures. This study tested the hypothesis that cortical thickness of PFC regions and gray matter volume of the hippocampus and amygdala differ between pediatric anxiety disorder patients and healthy volunteers (HVs)...
April 24, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28436342/comparison-of-neural-substrates-of-temporal-discounting-between-youth-with-autism-spectrum-disorder-and-with-obsessive-compulsive-disorder
#2
C O Carlisi, L Norman, C M Murphy, A Christakou, K Chantiluke, V Giampietro, A Simmons, M Brammer, D G Murphy, D Mataix-Cols, K Rubia
BACKGROUND: Autism spectrum disorder (ASD) and obsessive-compulsive disorder (OCD) share abnormalities in hot executive functions such as reward-based decision-making, as measured in the temporal discounting task (TD). No studies, however, have directly compared these disorders to investigate common/distinct neural profiles underlying such abnormalities. We wanted to test whether reward-based decision-making is a shared transdiagnostic feature of both disorders with similar neurofunctional substrates or whether it is a shared phenotype with disorder-differential neurofunctional underpinnings...
April 24, 2017: Psychological Medicine
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/28413776/dissociable-neural-processes-during-risky-decision-making-in-individuals-with-internet-gaming-disorder
#4
Lu Liu, Gui Xue, Marc N Potenza, Jin-Tao Zhang, Yuan-Wei Yao, Cui-Cui Xia, Jing Lan, Shan-Shan Ma, Xiao-Yi Fang
Risk-taking is purported to be central to addictive behaviors. However, for Internet gaming disorder (IGD), a condition conceptualized as a behavioral addiction, the neural processes underlying impaired decision-making (risk evaluation and outcome processing) related to gains and losses have not been systematically investigated. Forty-one males with IGD and 27 healthy comparison (HC) male participants were recruited, and the cups task was used to identify neural processes associated with gain- and loss-related risk- and outcome-processing in IGD...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28411154/neural-mechanisms-of-individual-differences-in-temporal-discounting-of-monetary-and-primary-rewards-in-adolescents
#5
Erik de Water, Gabry W Mies, Bernd Figner, Yuliya Yoncheva, Wouter van den Bos, F Xavier Castellanos, Antonius H N Cillessen, Anouk Scheres
Adolescents are generally characterized as impulsive. However, impulsivity is a multi-dimensional construct that involves multiple component processes. Which of these components contribute to adolescent impulsivity is currently unclear. This study focused on the neural mechanisms underlying individual differences in distinct components of temporal discounting (TD), i.e., the preference for smaller immediate rewards over larger delayed rewards. Participants were 58 adolescents (12-16 years-old) who performed an fMRI TD task with both monetary and snack rewards...
April 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28408411/active-avoidance-neural-mechanisms-and-attenuation-of-pavlovian-conditioned-responding
#6
Emily A Boeke, Justin Moscarello, Joseph E LeDoux, Elizabeth A Phelps, Catherine A Hartley
Patients with anxiety disorders often experience a relapse in symptoms after exposure therapy. Similarly, threat responses acquired during Pavlovian threat conditioning often return after extinction learning. Accordingly, there is a need for alternative methods to persistently reduce threat responding. Studies in rodents have suggested that exercising behavioral control over an aversive stimulus can persistently diminish threat responses, and that these effects are mediated by the amygdala, ventromedial prefrontal cortex (vmPFC), and striatum...
April 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28406379/the-neural-basis-of-independence-versus-interdependence-orientations-a-voxel-based-morphometric-analysis-of-brain-volume
#7
Fei Wang, Kaiping Peng, Magdalena Chechlacz, Glyn W Humphreys, Jie Sui
Sociocultural research has established independence and interdependence as two fundamental ways of thinking about oneself and the social world. Recent neuroscience studies further demonstrate that these orientations modulate brain activity in various self- and socially related tasks. In the current study, we explored whether the traits of independence and interdependence are reflected in anatomical variations in brain structure. We carried out structural brain imaging on a large sample of healthy participants ( n = 265) who also completed self-report questionnaires of cultural orientations...
April 2017: Psychological Science
https://www.readbyqxmd.com/read/28404803/neuropsychiatric-symptoms-predict-hypometabolism-in-preclinical-alzheimer-disease
#8
Kok Pin Ng, Tharick A Pascoal, Sulantha Mathotaarachchi, Chang-Oh Chung, Andréa L Benedet, Monica Shin, Min Su Kang, Xiaofeng Li, Maowen Ba, Nagaendran Kandiah, Pedro Rosa-Neto, Serge Gauthier
OBJECTIVE: To identify regional brain metabolic dysfunctions associated with neuropsychiatric symptoms (NPS) in preclinical Alzheimer disease (AD). METHODS: We stratified 115 cognitively normal individuals into preclinical AD (both amyloid and tau pathologies present), asymptomatic at risk for AD (either amyloid or tau pathology present), or healthy controls (no amyloid or tau pathology present) using [(18)F]florbetapir PET and CSF phosphorylated tau biomarkers...
April 12, 2017: Neurology
https://www.readbyqxmd.com/read/28403387/skin-conductance-responses-and-neural-activations-during-fear-conditioning-and-extinction-recall-across-anxiety-disorders
#9
Marie-France Marin, Rachel G Zsido, Huijin Song, Natasha B Lasko, William D S Killgore, Scott L Rauch, Naomi M Simon, Mohammed R Milad
Importance: The fear conditioning and extinction neurocircuitry has been extensively studied in healthy and clinical populations, with a particular focus on posttraumatic stress disorder. Despite significant overlap of symptoms between posttraumatic stress disorder and anxiety disorders, the latter has received less attention. Given that dysregulated fear levels characterize anxiety disorders, examining the neural correlates of fear and extinction learning may shed light on the pathogenesis of underlying anxiety disorders...
April 12, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/28402574/hard-to-look-on-the-bright-side-neural-correlates-of-impaired-emotion-regulation-in-depressed-youth
#10
Katerina Stephanou, Christopher G Davey, Rebecca Kerestes, Sarah Whittle, Ben J Harrison
The cognitive regulation of emotion is impaired in major depressive disorder and has been linked to an imbalance of prefrontal-subcortical brain activity. Despite suggestions that this relationship represents a neurodevelopmental marker of depression, few studies have examined the neural correlates of emotion regulation in depressed youth. We combined a 'cognitive reappraisal' paradigm with functional magnetic resonance imaging to study the neural correlates of emotional regulation in a large sample of non-medicated depressed adolescents and young adults (n = 53), and healthy controls (n = 64)...
April 11, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28399689/the-cognitive-neuroscience-of-placebo-effects-concepts-predictions-and-physiology
#11
Stephan Geuter, Leonie Koban, Tor D Wager
Placebos have been used ubiquitously throughout the history of medicine. Expectations and associative learning processes are important psychological determinants of placebo effects, but their underlying brain mechanisms are only beginning to be understood. We examine the brain systems underlying placebo effects on pain, autonomic, and immune responses. The ventromedial prefrontal cortex (vmPFC), insula, amygdala, hypothalamus, and periaqueductal gray emerge as central brain structures underlying placebo effects...
April 7, 2017: Annual Review of Neuroscience
https://www.readbyqxmd.com/read/28398590/putting-race-in-context-social-class-modulates-processing-of-race-in-the-ventromedial-prefrontal-cortex-and-amygdala
#12
Rengin B Firat, Steven Hitlin, Vincent Magnotta, Daniel Tranel
A growing body of literature demonstrates that racial group membership can influence neural responses, e.g., when individuals perceive or interact with persons of another race. However, little attention has been paid to social class, a factor that interacts with racial inequalities in American society. We extend previous literature on race-related neural activity by focusing on how the human brain responds to racial out-groups cast in positively-valued social class positions vs. less valued ones. We predicted that the ventromedial prefrontal cortex (vmPFC) and the amygdala would have functionally dissociable roles, with the vmPFC playing a more significant role within socially valued in-groups (i...
April 7, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28392485/prefrontal-endocannabinoids-stress-controllability-and-resilience-a-hypothesis
#13
REVIEW
Nicholas B Worley, Matthew N Hill, John P Christianson
Stressor exposure is a predisposing risk factor for many psychiatric conditions such as PTSD and depression. However, stressors do not influence all individuals equally and in response to an identical stressor some individuals may be vulnerable while others are resilient. While various biological and behavioral factors contribute to vulnerability versus resilience, an individual's degree of control over the stressor is among the most potent. Even with only one experience with control over stress, behavioral control has been shown to have acute and long-lasting stress-mitigating effects...
April 7, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28392301/biological-and-cognitive-underpinnings-of-religious-fundamentalism
#14
Wanting Zhong, Irene Cristofori, Joseph Bulbulia, Frank Krueger, Jordan Grafman
Beliefs profoundly affect people's lives, but their cognitive and neural pathways are poorly understood. Although previous research has identified the ventromedial prefrontal cortex (vmPFC) as critical to representing religious beliefs, the means by which vmPFC enables religious belief is uncertain. We hypothesized that the vmPFC represents diverse religious beliefs and that a vmPFC lesion would be associated with religious fundamentalism, or the narrowing of religious beliefs. To test this prediction, we assessed religious adherence with a widely-used religious fundamentalism scale in a large sample of 119 patients with penetrating traumatic brain injury (pTBI)...
April 6, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28390148/toward-an-electrophysiological-sweet-spot-for-deep-brain-stimulation-in-the-subthalamic-nucleus
#15
Andreas Horn, Wolf-Julian Neumann, Katharina Degen, Gerd-Helge Schneider, Andrea A Kühn
Enhanced beta-band activity recorded in patients suffering from Parkinson's Disease (PD) has been described as a potential physiomarker for disease severity. Beta power is suppressed by Levodopa intake and STN deep brain stimulation (DBS) and correlates with disease severity across patients. The aim of the present study was to explore the promising signature of the physiomarker in the spatial domain. Based on local field potential data acquired from 54 patients undergoing STN-DBS, power values within alpha, beta, low beta, and high beta bands were calculated...
April 8, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28376408/impact-of-the-neural-correlates-of-stress-and-cue-reactivity-on-stress-related-binge-eating-in-the-natural-environment
#16
Sarah Fischer, Lauren Breithaupt, Joseph Wonderlich, Margaret L Westwater, Ross D Crosby, Scott G Engel, James Thompson, Jason Lavender, Stephen Wonderlich
Women with symptoms of bulimia nervosa (BN) exhibit decreased response to visual food cues in several limbic and frontal regions compared to controls. Stress causes decreased blood oxygenation level dependent (BOLD) response in these regions in non-clinical samples; there is a lack of data on this topic in BN. This study examined the impact of individual differences in neural reactivity to palatable food cues following acute stress on stress-binge trajectories in everyday life. 16 women with BN symptoms viewed palatable food cues prior to and immediately following an acute stress induction in the scanner...
March 25, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28369363/noninvasive-stimulation-of-the-ventromedial-prefrontal-cortex-enhances-pleasant-scene-processing
#17
Markus Junghofer, Constantin Winker, Maimu A Rehbein, Dean Sabatinelli
Depressive patients typically show biased attention towards unpleasant and away from pleasant emotional material. Imaging studies suggest that dysfunctions in a distributed neural network, including the ventromedial prefrontal cortex (vmPFC), are associated with this processing bias. Accordingly, changes in vmPFC activation should mediate changes in processing of emotional stimuli. Here, we investigated the effect of inhibitory and excitatory transcranial direct current stimulation (tDCS) of the vmPFC on emotional scene processing in two within-subject experiments using functional magnetic resonance imaging (fMRI) and magnetoencephalography (MEG)...
March 25, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28339164/are-schizophrenia-autistic-and-obsessive-spectrum-disorders-dissociable-on-the-basis-of-neuroimaging-morphological-findings-a-voxel-based-meta-analysis
#18
Franco Cauda, Tommaso Costa, Andrea Nani, Luciano Fava, Sara Palermo, Francesca Bianco, Sergio Duca, Karina Tatu, Roberto Keller
Schizophrenia spectrum disorder (SCZD), autism spectrum disorder (ASD), and obsessive-compulsive spectrum disorder (OCSD) are considered as three separate psychiatric conditions with, supposedly, different brain alterations patterns. From a neuroimaging perspective, this meta-analytic study aimed to address whether this nosographical differentiation is actually supported by different brain patterns of gray matter (GM) or white matter (WM) morphological alterations. We explored two possibilities: (a) to find out whether GM alterations are specific for SCZD, ASD, and OCSD; and (b) to associate the identified brain alteration patterns with cognitive dysfunctions by means of an analysis of lesion decoding...
March 24, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28338795/-mom-i-don-t-want-to-hear-it-brain-response-to-maternal-praise-and-criticism-in-adolescents-with-major-depressive-disorder
#19
Jennifer S Silk, Kyung Hwa Lee, Rosalind D Elliott, Jill M Hooley, Ronald E Dahl, Anita Barber, Greg J Siegle
Recent research has implicated altered neural response to interpersonal feedback as an important factor in adolescent depression, with existing studies focusing on responses to feedback from virtual peers. We investigated whether depressed adolescents differed from healthy youth in neural response to social evaluative feedback from mothers. During neuroimaging, twenty adolescents in a current episode of major depressive disorder (MDD) and 28 healthy controls listened to previously recorded audio clips of their own mothers' praise, criticism and neutral comments...
February 17, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28338791/brains-in-dialogue-decoding-neural-preparation-of-speaking-to-a-conversational-partner
#20
Anna K Kuhlen, Carsten Bogler, Susan E Brennan, John-Dylan Haynes
In dialogue, language processing is adapted to the conversational partner. We hypothesize that the brain facilitates partner-adapted language processing through preparatory neural configurations (task sets) that are tailored to the conversational partner. In this experiment, we measured neural activity with functional magnetic resonance imaging (fMRI) while healthy participants in the scanner (a) engaged in a verbal communication task with a conversational partner outside of the scanner, or (b) spoke outside of a conversational context (to test the microphone)...
February 17, 2017: Social Cognitive and Affective Neuroscience
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