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https://www.readbyqxmd.com/read/28211596/the-structure-of-adult-adhd
#1
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/28211553/the-assessment-of-schizotypy-by-the-o-life-oxford-liverpool-inventory-for-feelings-and-experiences-in-patients-with-schizophrenia-and-affective-disorders
#2
Daria Dembińska-Krajewska, Janusz Rybakowski
OBJECTIVES: The aim of the study was to assess schizotypy by using the Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE), in the groups of patients with schizophrenia, bipolar disorder (BD) and unipolar (recurrent) depression (UD). An important element of the study was to compare - in terms of similarity - the results obtained in schizophrenia and BD, and - in terms of differences - the results obtained in BD and UD. METHODS: The study involved 58 patients with schizophrenia (35 men, 23 women, mean age = 34...
December 23, 2016: Psychiatria Polska
https://www.readbyqxmd.com/read/28209979/fractionating-impulsivity-neuropsychiatric-implications
#3
REVIEW
Jeffrey W Dalley, Trevor W Robbins
The ability to make decisions and act quickly without hesitation can be advantageous in many settings. However, when persistently expressed, impulsive decisions and actions are considered risky, maladaptive and symptomatic of such diverse brain disorders as attention-deficit hyperactivity disorder, drug addiction and affective disorders. Over the past decade, rapid progress has been made in the identification of discrete neural networks that underlie different forms of impulsivity - from impaired response inhibition and risky decision making to a profound intolerance of delayed rewards...
February 17, 2017: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/28206689/working-memory-ability-and-early-drug-use-progression-as-predictors-of-adolescent-substance-use-disorders
#4
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/28199191/trans-synaptic-homeostasis-at-the-myasthenic-neuromuscular-junction
#5
Jaap J Plomp
Properly sustained impulse transmission at the neuromuscular junction (NMJ) is crucial for successful muscle contraction. To guarantee this, NMJs not only possess a considerable safety factor in transmission but also have the ability to adjust the presynaptic acetylcholine release level to cope with any changes in the postsynaptic neurotransmitter sensitivity. This review will provide overview on the discovery and characterization of this synaptic homeostatic mechanism, especially in the condition of the neuromuscular disorder myasthenia gravis (MG) where the postsynaptic transmitter sensitivity at the NMJ becomes severely reduced due to autoimmune attack of acetylcholine receptors...
March 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28198416/a-one-week-5-choice-serial-reaction-time-task-to-measure-impulsivity-and-attention-in-adult-and-adolescent-mice
#6
Esther Remmelink, Uyen Chau, August B Smit, Matthijs Verhage, Maarten Loos
Many psychiatric disorders emerge during adolescence. The study of executive functions in animal models of these disorders critically requires short-duration tasks measuring these functions before the animal ages. Here, a novel 5-choice serial reaction time task (5-CSRTT) protocol is presented, to measure attention and impulsivity within one week, without scheduled food deprivation and with little animal handling. Mice were allowed 24-h/day task access from their home-cage, during which they could self-pace task progression and earn unlimited food rewards depending on task performance...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28197800/small-airway-obstruction-in-chronic-obstructive-pulmonary-disease-potential-parameters-for-early-detection
#7
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/28196992/subtyping-of-alcohol-dependence-in-indian-males-a-cluster-analytic-approach
#8
Savita Malhotra, Debasish Basu, Abhishek Ghosh, Madhu Khullar, Neeraj Kakkar
OBJECTIVES: Two cluster solutions for the subtyping of alcohol dependence (AD) was investigated in an Indian male population. Subtypes were compared for various personality traits and childhood externalizing disorders. They were also compared with respect to single-nucleotide polymorphisms (SNP) of various candidate genes. MATERIALS AND METHODS: This was a clinic-based study conducted among 202 patients with AD. All patients were assessed with SSAGA-II for comorbid antisocial personality disorder (ASPD) and childhood conduct disorder (CD), oppositional defiant disorder (ODD), and attention deficit hyperactivity disorder (ADHD)...
October 2016: Indian Journal of Psychiatry
https://www.readbyqxmd.com/read/28193454/new-developments-in-brain-research-of-internet-and-gaming-disorder
#9
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 10, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28190729/a-functional-gradient-in-the-rodent-prefrontal-cortex-supports-behavioral-inhibition
#10
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 7, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28186314/psychopathological-profile-and-prevalence-of-dual-pathology-on-patients-with-alcoholic-dependence-undergoing-outpatient-treatment
#11
Miguel A García-Carretero, José P Novalbos-Ruiz, María Robles-Martínez, María A Jordán-Quintero, Cristina O'Ferrall-González
AIMS: Assess the prevalence of dual pathology in patients with alcohol dependence and describe the psychopathological profile of mental disorders, impulsiveness, ADHD presence and craving. METHOD: It is a cross-sectional study about dual pathology, carried out on 102 patients undergoing outpatient treatment. The presence of dual pathology is established by means of the MINI-5 interview and the MCMI-III test; DSM-IV being used as the alcohol abuse criteria. Impulsiveness, ADHD presence, craving and quality of life were measured through SIS, ASRSv1, MACS and SF-36...
January 2017: Actas Españolas de Psiquiatría
https://www.readbyqxmd.com/read/28185093/altered-spontaneous-brain-activity-in-adolescent-boys-with-pure-conduct-disorder-revealed-by-regional-homogeneity-analysis
#12
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/28184164/assessment-and-monitoring-of-treatment-response-in-adult-adhd-patients-current-perspectives
#13
REVIEW
J Russell Ramsay
Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental syndrome that emerges in childhood or early adolescence and persists into adulthood for a majority of individuals. There are many other adults with ADHD who may not seek out evaluation and treatment until adulthood, having been able to "get by" before struggling with inattention, hyperactivity, and/or impulsivity in adulthood, in addition to facing the associated features of disorganization, poor time management, and procrastination among many others...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28179180/developing-a-3-choice-serial-reaction-time-task-for-examining-neural-and-cognitive-function-in-an-equine-model
#14
Kirsty Roberts, Andrew J Hemmings, Sebastian D McBride, Matthew O Parker
BACKGROUND: Large animal models of human neurological disorders are advantageous compared to rodent models due to their neuroanatomical complexity, longevity and their ability to be maintained in naturalised environments. Some large animal models spontaneously develop behaviours that closely resemble the symptoms of neural and psychiatric disorders. The horse is an example of this; the domestic form of this species consistently develops spontaneous stereotypic behaviours akin to the compulsive and impulsive behaviours observed in human neurological disorders such as Tourette's syndrome...
February 5, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28179105/a-prenatal-nicotine-exposure-mouse-model-of-methylphenidate-responsive-adhd-associated-cognitive-phenotypes
#15
Jinmin Zhu, Fangfang Fan, Deirdre M McCarthy, Lin Zhang, Elisa N Cannon, Thomas J Spencer, Joseph Biederman, Pradeep G Bhide
Prenatal exposure to nicotine via cigarette smoke or other forms of tobacco use is a significant environmental risk factor for attention deficit hyperactivity disorder (ADHD). The neurobiological mechanisms underlying the link between prenatal nicotine exposure (PNE) and ADHD are not well understood. Animal models, especially rodent models, are beginning to bridge this gap in knowledge. Although ADHD is characterized by hyperactivity, inattention, impulsivity and working memory deficits, the majority of the animal models are based on only one or two ADHD associated phenotypes, in particular, hyperactivity or inattention...
February 4, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28176268/no-genetic-association-between-attention-deficit-hyperactivity-disorder-adhd-and-parkinson-s-disease-in-nine-adhd-candidate-snps
#16
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
#17
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/28174528/anxious-individuals-are-impulsive-decision-makers-in-the-delay-discounting-task-an-erp-study
#18
Lisheng Xia, Ruolei Gu, Dandan Zhang, Yuejia Luo
Impulsivity, which is linked to a wide range of psychiatric disorders, is often characterized by a preference for immediate but smaller rewards over delayed but larger rewards. However, debate exists on the relationship between anxiety and impulsivity. Here we use event-related potential (ERP) components as biomarkers in the temporal discounting task to examine the effect of anxiety on inter-temporal decision-making. Our behavioral results indicated that the high trait anxiety (HTA) group made significantly more immediate choices than the low trait anxiety (LTA) group...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28174127/altered-functional-connectivity-in-default-mode-network-in-internet-gaming-disorder-influence-of-childhood-adhd
#19
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
#20
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
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