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Impulse-Control Disorders

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https://www.readbyqxmd.com/read/28231395/functional-connectivity-in-amygdalar-sensory-pre-motor-networks-at-rest-new-evidence-from-the-human-connectome-project
#1
Nicola Toschi, Andrea Duggento, Luca Passamonti
The word "e-motion" derives from the Latin word "ex-moveo" which literally means "moving away from something / somebody". Emotions are thus fundamental to prime action and goal-directed behavior with obvious implications for individual's survival. However, the brain mechanisms underlying the interactions between emotional and motor cortical systems remain poorly understood. A recent diffusion tensor imaging study in humans has reported the existence of direct anatomical connections between the amygdala and sensory/(pre)motor cortices, corroborating an initial observation in animal research...
February 23, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28229895/impulse-control-disorders-and-levodopa-induced-dyskinesias-in-parkinson-s-disease-an-update
#2
REVIEW
Valerie Voon, T Celeste Napier, Michael J Frank, Veronique Sgambato-Faure, Anthony A Grace, Maria Rodriguez-Oroz, Jose Obeso, Erwan Bezard, Pierre-Olivier Fernagut
Dopaminergic medications used in the treatment of patients with Parkinson's disease are associated with motor and non-motor behavioural side-effects, such as dyskinesias and impulse control disorders also known as behavioural addictions. Levodopa-induced dyskinesias occur in up to 80% of patients with Parkinson's after a few years of chronic treatment. Impulse control disorders, including gambling disorder, binge eating disorder, compulsive sexual behaviour, and compulsive shopping occur in about 17% of patients with Parkinson's disease on dopamine agonists...
March 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28223713/reduced-white-matter-integrity-in-antisocial-personality-disorder-a-diffusion-tensor-imaging-study
#3
Weixiong Jiang, Feng Shi, Huasheng Liu, Gang Li, Zhongxiang Ding, Hui Shen, Celina Shen, Seong-Whan Lee, Dewen Hu, Wei Wang, Dinggang Shen
Emerging neuroimaging research suggests that antisocial personality disorder (ASPD) may be linked to abnormal brain anatomy, but little is known about possible impairments of white matter microstructure in ASPD, as well as their relationship with impulsivity or risky behaviors. In this study, we systematically investigated white matter abnormalities of ASPD using diffusion tensor imaging (DTI) measures: fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD). Then, we further investigated their correlations with the scores of impulsivity or risky behaviors...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211596/the-structure-of-adult-adhd
#4
Lenard A Adler, Stephen V Faraone, Thomas J Spencer, Patricia Berglund, Samuel Alperin, Ronald C Kessler
Although DSM-5 stipulates that symptoms of attention-deficit hyperactivity disorder (ADHD) are the same for adults as children, clinical observations suggest that adults have more diverse deficits than children in higher-level executive functioning and emotional control. Previous psychometric analyses to evaluate these observations have been limited in ways addressed in the current study, which analyzes the structure of an expanded set of adult ADHD symptoms in three pooled US samples: a national household sample, a sample of health plan members, and a sample of adults referred for evaluation at an adult ADHD clinic...
February 17, 2017: International Journal of Methods in Psychiatric Research
https://www.readbyqxmd.com/read/28206689/working-memory-ability-and-early-drug-use-progression-as-predictors-of-adolescent-substance-use-disorders
#5
Atika Khurana, Daniel Romer, Laura M Betancourt, Hallam Hurt
AIMS: To test a neurobehavioral model of adolescent substance use disorder (SUD) resulting from an imbalance between a hyperactive reward motivation system and a hypoactive executive control system. Specifically, we tested (1) if early weakness in working memory (WM) and associated imbalance indicators of acting-without-thinking (AWT) and delay discounting (DD) predict SUD in late adolescence, and (2) if early drug use progression mediates this relation. DESIGN: Five waves of longitudinal data collected annually from 2005-2010, with a final follow-up in 2012...
February 16, 2017: Addiction
https://www.readbyqxmd.com/read/28197800/small-airway-obstruction-in-chronic-obstructive-pulmonary-disease-potential-parameters-for-early-detection
#6
Tomasz Piorunek, Magdalena Kostrzewska, Marta Stelmach-Mardas, Marcin Mardas, Sławomir Michalak, Joanna Goździk-Spychalska, Halina Batura-Gabryel
The impulse oscillometry (IOS) is recognized as a complementary method to spirometry in the diagnostics of obstructive pulmonary disorders. The IOS enables to measure total respiratory resistance (R5) and proximal respiratory resistance (R20), with the R5-R20 difference reflecting small airway resistance. This study seeks to evaluate the usefulness of R5-R20, maximal mid-expiratory flow (MMEF), and forced expiratory volume in 3 s/forced vital capacity ratio (FEV3/FVC), in the assessment of small airway obstruction in chronic obstructive pulmonary disease (COPD)...
February 15, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28193454/new-developments-in-brain-research-of-internet-and-gaming-disorder
#7
REVIEW
Aviv Weinstein, Abigail Livny, Abraham Weizman
There is evidence that the neural mechanisms underlying Internet Gaming Disorder (IGD) resemble those of drug addiction. Functional Magnetic Resonance Imaging (fMRI) studies of the resting state and measures of gray matter volume have shown that Internet game playing was associated with changes to brain regions responsible for attention and control, impulse control, motor function, emotional regulation, sensory-motor coordination. Furthermore, Internet game playing was associated with lower white matter density in brain regions that are involved in decision-making, behavioral inhibition and emotional regulation...
February 11, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28190729/a-functional-gradient-in-the-rodent-prefrontal-cortex-supports-behavioral-inhibition
#8
Stefanie Hardung, Robert Epple, Zoe Jäckel, David Eriksson, Cem Uran, Verena Senn, Lihi Gibor, Ofer Yizhar, Ilka Diester
The ability to plan and execute appropriately timed responses to external stimuli is based on a well-orchestrated balance between movement initiation and inhibition. In impulse control disorders involving the prefrontal cortex (PFC) [1], this balance is disturbed, emphasizing the critical role that PFC plays in appropriately timing actions [2-4]. Here, we employed optogenetic and electrophysiological techniques to systematically analyze the functional role of five key subareas of the rat medial PFC (mPFC) and orbitofrontal cortex (OFC) in action control [5-9]...
February 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28185093/altered-spontaneous-brain-activity-in-adolescent-boys-with-pure-conduct-disorder-revealed-by-regional-homogeneity-analysis
#9
Qiong Wu, Xiaocui Zhang, Daifeng Dong, Xiang Wang, Shuqiao Yao
Functional magnetic resonance imaging (fMRI) studies have revealed abnormal neural activity in several brain regions of adolescents with conduct disorder (CD) performing various tasks. However, little is known about the spontaneous neural activity in people with CD in a resting state. The aims of this study were to investigate CD-associated regional activity abnormalities and to explore the relationship between behavioral impulsivity and regional activity abnormalities. Resting-state fMRI (rs-fMRI) scans were administered to 28 adolescents with CD and 28 age-, gender-, and IQ-matched healthy controls (HCs)...
February 9, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28176268/no-genetic-association-between-attention-deficit-hyperactivity-disorder-adhd-and-parkinson-s-disease-in-nine-adhd-candidate-snps
#10
Julia M Geissler, Marcel Romanos, Manfred Gerlach, Daniela Berg, Claudia Schulte
Attention-deficit/hyperactivity disorder (ADHD) and Parkinson's disease (PD) involve pathological changes in brain structures such as the basal ganglia, which are essential for the control of motor and cognitive behavior and impulsivity. The cause of ADHD and PD remains unknown, but there is increasing evidence that both seem to result from a complicated interplay of genetic and environmental factors affecting numerous cellular processes and brain regions. To explore the possibility of common genetic pathways within the respective pathophysiologies, nine ADHD candidate single nucleotide polymorphisms (SNPs) in seven genes were tested for association with PD in 5333 cases and 12,019 healthy controls: one variant, respectively, in the genes coding for synaptosomal-associated protein 25 k (SNAP25), the dopamine (DA) transporter (SLC6A3; DAT1), DA receptor D4 (DRD4), serotonin receptor 1B (HTR1B), tryptophan hydroxylase 2 (TPH2), the norepinephrine transporter SLC6A2 and three SNPs in cadherin 13 (CDH13)...
February 7, 2017: Attention Deficit and Hyperactivity Disorders
https://www.readbyqxmd.com/read/28176009/dopamine-and-serotonin-modulation-of-motor-and-non-motor-functions-of-the-non-human-primate-striato-pallidal-circuits-in-normal-and-pathological-states
#11
REVIEW
Véronique Sgambato-Faure, Léon Tremblay
Thanks to the non-human primate (NHP), we have shown that the pharmacological disturbance of the anterior striatum or of external globus pallidus triggers a set of motivation and movement disorders, depending on the functional subterritory involved. One can, therefore, assume that the aberrant activity of the different subterritories of basal ganglia (BG) could lead to different behavioral disorders in neuropsychiatric disorders as Tourette's syndrome and Parkinson's disease. We are now addressing in the NHP the impact of modulating dopamine or serotonin within the BG on behavioral disorders...
February 7, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/28174127/altered-functional-connectivity-in-default-mode-network-in-internet-gaming-disorder-influence-of-childhood-adhd
#12
Deokjong Lee, Junghan Lee, Jung Eun Lee, Young-Chul Jung
OBJECTIVE: Internet gaming disorder (IGD) is a type of behavioral addiction characterized by abnormal executive control, leading to loss of control over excessive gaming. Attention deficit and hyperactivity disorder (ADHD) is one of the most common comorbid disorders in IGD, involving delayed development of the executive control system, which could predispose individuals to gaming addiction. We investigated the influence of childhood ADHD on neural network features of IGD. METHODS: Resting-state functional magnetic resonance imaging analysis was performed on 44 young, male IGD subjects with and without childhood ADHD and 19 age-matched, healthy male controls...
February 5, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28173729/structural-and-functional-abnormalities-in-children-with-adhd-a-focus-on-subgenual-anterior-cingulate-cortex
#13
Chenyang Zhan, Yuhong Liu, Kai Wu, Yu Gao, Xiaobo Li
Attention-Deficit/Hyperactivity Disorder (ADHD), characterized by developmentally inappropriate inattention, hyperactivity/impulsivity, or a combination of both, is a major public health problem. Neuroimaging studies have revealed associations of these cognitive impairments with structural and functional deficits all over the brain. Existing findings are not fully consistent due to the heterogeneity of study samples and diversity of research techniques. In the current study, we propose to utilize a multi-modal MRI approach to study the structural and functional brain networks in children with ADHD-combined type (ADHD-C) with a focus on the subgenual anterior cingulate cortex (sgACC)...
February 7, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28160693/a-comprehensive-model-of-food-addiction-in-patients-with-binge-eating-symptomatology-the-essential-role-of-negative-urgency
#14
Ines Wolz, Roser Granero, Fernando Fernández-Aranda
BACKGROUND: Food addiction has been widely researched in past years. However, there is a debate on the mechanisms underlying addictive eating and a better understanding of the processes associated to these behaviors is needed. Previous studies have found characteristic psychological correlates of food addiction, such as high negative urgency, emotion regulation difficulties and low self-directedness, in different samples of adults with addictive eating patterns. Still, it seems difficult to disentangle effects independent from general eating disorder psychopathology...
January 23, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28159648/the-role-of-neuroimmune-signaling-in-alcoholism
#15
REVIEW
Fulton T Crews, Colleen J Lawrimore, T Jordan Walter, Leon G Coleman
Alcohol consumption and stress increase brain levels of known innate immune signaling molecules. Microglia, the innate immune cells of the brain, and neurons respond to alcohol, signaling through Toll-like receptors (TLRs), high-mobility group box 1 (HMGB1), miRNAs, pro-inflammatory cytokines and their associated receptors involved in signaling between microglia, other glia and neurons. Repeated cycles of alcohol and stress cause a progressive, persistent induction of HMGB1, miRNA and TLR receptors in brain that appear to underlie the progressive and persistent loss of behavioral control, increased impulsivity and anxiety, as well as craving, coupled with increasing ventral striatal responses that promote reward seeking behavior and increase risk of developing alcohol use disorders...
February 1, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28150800/alexithymia-and-personality-traits-of-patients-with-inflammatory-bowel-disease
#16
D La Barbera, B Bonanno, M V Rumeo, V Alabastro, M Frenda, E Massihnia, M C Morgante, L Sideli, A Craxì, M Cappello, M Tumminello, S Miccichè, L Nastri
Psychological factors, specific lifestyles and environmental stressors may influence etiopathogenesis and evolution of chronic diseases. We investigate the association between Chronic Inflammatory Bowel Diseases (IBD) and psychological dimensions such as personality traits, defence mechanisms, and Alexithymia, i.e. deficits of emotional awareness with inability to give a name to emotional states. We analyzed a survey of 100 patients with IBD and a control group of 66 healthy individuals. The survey involved filling out clinical and anamnestic forms and administering five psychological tests...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28144810/preventing-conduct-disorder-and-callous-unemotional-traits-preliminary-results-of-a-school-based-pilot-training-program
#17
Melina Nicole Kyranides, Kostas A Fanti, Evita Katsimicha, Giorgos Georgiou
This study investigated whether a school-based pilot prevention program is effective in reducing Conduct Disorder (CD) symptoms and callous unemotional (CU) traits (i.e., lack of empathy and guilt) in a community sample of children. A total of 304 children from three schools in Cyprus were randomly assigned at school level to either a prevention group that received a skill building training program (N = 94; M age  = 7.91, SD = .74; 52.1% female) or a control group that received no training (N = 210; M age  = 7...
February 1, 2017: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/28141718/attention-deficit-hyperactivity-disorder-behavior-regulation-and-virtual-school-support
#18
Claire Wallace, Carolyn E Ievers-Landis, Catherine Scherer, Nancy Roizen, Marilyn Augustyn
Tony is a 6-year-old multiracial boy diagnosed as having attention-deficit/hyperactivity disorder-combined type who is followed in your primary care practice and has started on a stimulant medication. Tony continues to have difficulty with emotion regulation and impulse control both at home and at school. He was asked to leave his private school soon after beginning first grade because of physical fighting, emotional outbursts, and arguing with teachers.His mother made the decision to enroll Tony in online virtual schooling for the remainder of the academic year, with the plan to transition back to traditional school for the next academic year...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28141706/attached-to-a-diagnosis-the-quandary-of-social-deficits-and-reactive-attachment-disorder
#19
Randall Phelps, Debra Eisert, Susan Schulz, Marilyn Augustyn
Alex is a 9-year-old boy brought to you, his primary care provider, for a "fifth opinion." You have cared for Alex since he was adopted from a Romanian orphanage at 3 years of age. He has been physically healthy with normal growth parameters and no evidence of fetal alcohol syndrome. Alex has long-standing history of social difficulties, impulsivity, lying, controlling, manipulative behaviors, violent outbursts at home with subsequent lack of remorse, and excessive chatter. You referred Alex to an interdisciplinary child development clinic 2 years ago, where he was diagnosed with reactive attachment disorder (RAD) and attention deficit hyperactivity disorder (ADHD)...
February 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28135642/associations-between-self-harm-and-distinct-types-of-impulsivity
#20
Samuel R Chamberlain, Sarah A Redden, Jon E Grant
OBJECTIVE: There is an ongoing debate regarding how self-harm should be classified. The aim of this study was to characterize associations between self-harm and impulsivity. METHOD: Total 333 adults (mean [SD] age 22.6 (3.6) years, 61% male) were recruited from the general community. History of self-harm was quantified using the Self-Harm Inventory (SHI), which asks about 22 self-harm behaviors. Principal components analysis was used to identify latent dimensions of self-harming behaviors...
January 21, 2017: Psychiatry Research
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