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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/28209169/vascular-impulse-technology-versus-elevation-in-the-treatment-of-posttraumatic-swelling-of-extremity-fractures-study-protocol-for-a-randomized-controlled-trial
#2
Marc Schnetzke, Benedict Swartman, Isabel Bonnen, Holger Keil, Svenja Schüler, Paul A Grützner, Jochen Franke
BACKGROUND: Fractures of the extremities are often complicated by a variable degree of swelling secondary to hemorrhage and soft tissue injury. Patients typically require up to 7 days of inpatient bed rest and elevation to reduce swelling to an acceptable level for operative treatment with internal fixation. Alternatively, an intermittent pneumatic compression device, such as the Vascular Impulse Technology (VIT) system, can be used at the injured extremity to reduce the posttraumatic swelling...
February 16, 2017: Trials
https://www.readbyqxmd.com/read/28206689/working-memory-ability-and-early-drug-use-progression-as-predictors-of-adolescent-substance-use-disorders
#3
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/28203636/i-want-to-media-multitask-and-i-want-to-do-it-now-individual-differences-in-media-multitasking-predict-delay-of-gratification-and-system-1-thinking
#4
Dan Schutten, Kirk A Stokes, Karen M Arnell
Media multitasking, the concurrent use of multiple media forms, has been shown to be related to greater self-reported impulsivity and less self-control. These measures are both hallmarks of the need for immediate gratification which has been associated with fast, intuitive 'system-1' decision making, as opposed to more deliberate and effortful 'system-2' decision making. In Study 1, we used the Cognitive Reflection Task (CRT) to examine whether individuals who engage heavily in media multitasking differ from those who are light media multitaskers in their degree of system-1 versus system-2 thinking...
2017: Cogn Res Princ Implic
https://www.readbyqxmd.com/read/28203384/venous-haemodynamics-of-jet-impulse-technology-within-a-lower-limb-fibreglass-cast-a-randomized-controlled-trial
#5
Irene Braithwaite, Stephen Mackintosh, Samantha Buchanan, Kerstin Schwarzenlander, Bernadette De Ruyter
OBJECTIVES: We investigated popliteal venous haemodynamics of the VenaJet Jet Impulse Technology system within a below-knee fibreglass cast. DESIGN: Randomized controlled trial. PARTICIPANTS: Twenty-four healthy participants aged 18-54 had both feet placed within the Jet Impulse Technology system and were randomised for one or other leg to be within a below-knee fibreglass cast. SETTING: Pacific Radiology, Lower Hutt, Wellington...
February 2017: JRSM Open
https://www.readbyqxmd.com/read/28202787/dysregulated-glycine-signaling-contributes-to-increased-impulsivity-during-protracted-alcohol-abstinence
#6
Cristina Irimia, Matthew W Buczynski, Luis A Natividad, Sarah A Laredo, Nathaniel Avalos, Loren H Parsons
Persons with alcoholism who are abstinent exhibit persistent impairments in the capacity for response inhibition, and this form of impulsivity is significantly associated with heightened relapse risk. Brain-imaging studies implicate aberrant prefrontal cortical function in this behavioral pathology, although the underlying mechanisms are not understood. Here we present evidence that deficient activation of glycine and serine release in the ventral medial prefrontal cortex (vmPFC) contributes to increased motor impulsivity during protracted abstinence from long-term alcohol exposure...
February 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28198452/undervaluing-delayed-rewards-explains-adolescents-impulsivity-in-inter-temporal-choice-an-erp-study
#7
Yunyun Huang, Ping Hu, Xueting Li
Adolescence has frequently been characterized as a period of choice impulsivity relative to adulthood. According to the control-integrated valuation model of inter-temporal choice, this choice impulsivity may be driven partly by an age-related difference in reward processing. We hypothesized that, compared to adults, adolescents would undervalue delayed rewards during reward processing and would thus be more impulsive in inter-temporal choice. To test this hypothesis at the behavioural and neural levels, we first measured the choice impulsivity of 18 adolescents and 19 adults using a delay discounting task (DDT)...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28197800/small-airway-obstruction-in-chronic-obstructive-pulmonary-disease-potential-parameters-for-early-detection
#8
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/28197651/effects-of-early-life-stress-and-adolescent-ethanol-exposure-on-adult-cognitive-performance-in-the-5-choice-serial-reaction-time-task-in-wistar-male-rats
#9
Nathalie Boutros, Andre Der-Avakian, Athina Markou, Svetlana Semenova
RATIONALE: Early life stress combined with heavy adolescent alcohol use predicts impaired neuropsychological functioning in adulthood. We investigated whether adolescent intermittent ethanol (AIE) exposure combined with neonatal maternal separation in rats altered attentional processes and impulsivity in adulthood. METHODS: Male Wistar rat pups were exposed to maternal separation (postnatal days (PNDs) 1-14) and moderate AIE exposure (PNDs 28-57). Adult rats were tested in the five-choice serial reaction time task, which provides separate measures of attention, motor impulsivity, and compulsivity...
February 14, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28196787/current-forms-of-inhibitory-training-produce-no-greater-reduction-in-drinking-than-simple-assessment-a-preliminary-study
#10
Janette L Smith, Nicole J Dash, Stuart J Johnstone, Katrijn Houben, Matt Field
BACKGROUND: Disinhibition is apparent in users of many substances, including heavy drinkers. Previous research has shown that brief training to improve inhibitory control is associated with reduced alcohol consumption. We investigated whether a new form of inhibitory training would produce greater reductions, relative to a carefully designed control condition and a proven method of reducing consumption, the Brief Alcohol Intervention (BAI). METHODS: One hundred and fourteen regular drinkers were assigned randomly to one of five training conditions: Control (no inhibitory training); Beer-NoGo (inhibit responses linked to task-irrelevant pictures of beer); Restrained-Stop (requiring more urgent inhibition but without pictures of beer); Combined (a previously untested form of training requiring urgent inhibition to pictures of beer); or BAI...
January 31, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28195999/clinical-significance-of-arterial-stiffness-and-metabolic-syndrome-scores-in-vestibular-neuritis
#11
Jae Ho Chung, Seung Hwan Lee, Chul Won Park, Jin Hyeok Jeong, Jeong-Hun Shin
OBJECTIVE: To investigate the clinical significance of cardiovascular factors, including arterial stiffness and metabolic syndrome scores, in the development of vestibular neuritis. STUDY DESIGN: A prospective, case-control study. SETTING: Tertiary referral center. PATIENTS: Fifty-eight adult patients with vestibular neuritis (VN) and 58 age- and sex-matched controls were evaluated between January 2015 and January 2016...
February 10, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28193694/different-cav1-3-channel-isoforms-control-distinct-components-of-the-synaptic-vesicle-cycle-in-auditory-inner-hair-cells
#12
Philippe Fy Vincent, Yohan Bouleau, Gilles Charpentier, Alice Emptoz, Saaid Safieddine, Christine Petit, Didier Dulon
The mechanisms orchestrating transient and sustained exocytosis in auditory inner hair cells (IHCs) remain largely unknown. These exocytotic responses are believed to mobilize sequentially a readily releasable pool of vesicles (RRP) underneath the synaptic ribbons and a slowly releasable pool of vesicles (SRP) at farther distance from them. They are both governed by Cav1.3 channels and require otoferlin as Ca(2+) sensor but whether they use the same Cav1.3 isoforms is still unknown. Using whole cell patch clamp recordings in post-hearing mice, we show that only a proportion (∼25 %) of the total Ca(2+) current in IHCs, displaying fast inactivation and resistance to 20 μM nifedipine, a L-type Ca(2+) channel blocker, is sufficient to trigger RRP but not SRP exocytosis...
February 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28193454/new-developments-in-brain-research-of-internet-and-gaming-disorder
#13
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
#14
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/28188819/potential-short-term-neurobehavioral-alterations-in-children-associated-with-a-peak-pesticide-spray-season-the-mother-s-day-flower-harvest-in-ecuador
#15
Jose R Suarez-Lopez, Harvey Checkoway, David R Jacobs, Wael K Al-Delaimy, Sheila Gahagan
BACKGROUND: Exposures to cholinesterase inhibitor pesticides (e.g. organophosphates) have been associated with children's neurobehavioral alterations, including attention deficit and impulsivity. Animal studies have observed transient alterations in neurobehavioral performance in relation to cholinesterase inhibitor pesticide exposures; however, limited evidence exists regarding transient effects in humans. METHODS: We estimated the associations between neurobehavioral performance and time after Mother's Day flower harvest (the end of a heightened pesticide usage period) among 308 4-to 9-year-old children living in floricultural communities in Ecuador in 2008 who participated in the ESPINA study...
February 7, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28186316/inhibitory-capacity-assessment-in-alcohol-dependent-patients-translation-from-a-modified-stop-signal-task
#16
Ana Sion, Rosa Jurado-Barba, M José Alonso, Gabriel Rubio-Valladolid
INTRODUCTION: Inhibitory control is clearly impaired in alcohol dependent individuals, being associated to the addiction process establishment and abstinence maintenance difficulties. Inhibitory control assessment tasks involving responses to neutral stimuli are available, although a Spanish version task including contextual cues influence on inhibition capacity has not been performed yet. Alcohol related stimuli can modify behavioural inhibition performance. Thus, the purpose of this study was the Spanish translation of a modified stop signal task that assessed inhibitory control, as well as the degree of interference produced by the presence of alcohol related words...
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
#17
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/28182558/model-based-adaptive-event-triggered-control-of-strict-feedback-nonlinear-systems
#18
Yuan-Xin Li, Guang-Hong Yang
This paper is concerned with the adaptive event-triggered control problem of nonlinear continuous-time systems in strict-feedback form. By using the event-sampled neural network (NN) to approximate the unknown nonlinear function, an adaptive model and an associated event-triggered controller are designed by exploiting the backstepping method. In the proposed method, the feedback signals and the NN weights are aperiodically updated only when the event-triggered condition is violated. A positive lower bound on the minimum intersample time is guaranteed to avoid accumulation point...
February 2, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28181856/repeatability-of-quantitative-sensory-testing-in-healthy-cats-in-a-clinical-setting-with-comparison-to-cats-with-osteoarthritis
#19
Elena S Addison, Dylan N Clements
Objectives The aim of this study was to evaluate the repeatability of quantitative sensory tests (QSTs) in a group of healthy untrained cats (n = 14) and to compare the results with those from cats with osteoarthritis (n = 7). Methods Peak vertical force (PVF) and vertical impulse were measured on a pressure plate system. Thermal sensitivity was assessed using a temperature-controlled plate at 7°C and 40°C. Individual paw lifts and overall duration of paw lifts were counted and measured for each limb. Paw withdrawal thresholds were measured using manual and electronic von Frey monofilaments (MVF and EVF, respectively) applied to the metacarpal or metatarsal pads...
February 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28181007/regulation-of-hcn-ion-channels-by-non-canonical-cyclic-nucleotides
#20
Bryan VanSchouwen, Giuseppe Melacini
The hyperpolarization-activated cyclic-nucleotide-modulated (HCN) proteins are cAMP-regulated ion channels that play a key role in nerve impulse transmission and heart rate modulation in neuronal and cardiac cells, respectively. Although they are regulated primarily by cAMP, other cyclic nucleotides such as cGMP, cCMP, and cUMP serve as partial agonists for the HCN2 and HCN4 isoforms. By competing with cAMP for binding, these non-canonical ligands alter ion channel gating, and in turn, modulate the cAMP-dependent activation profiles...
February 9, 2017: Handbook of Experimental Pharmacology
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