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Reward dysfunction in AD/HD

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194 papers 100 to 500 followers Several notable papers detailing recent and historical evidence for amotivational symptoms in AD/HD
https://www.readbyqxmd.com/read/28551713/atomoxetine-effects-on-attentional-bias-to-drug-related-cues-in-cocaine-dependent-individuals
#1
Luca Passamonti, M Luijten, H Ziauddeen, I T S Coyle-Gilchrist, T Rittman, S A E Brain, R Regenthal, I H A Franken, B J Sahakian, E T Bullmore, T W Robbins, K D Ersche
RATIONALE: Biased attention towards drug-related cues and reduced inhibitory control over the regulation of drug-intake characterize drug addiction. The noradrenaline system has been critically implicated in both attentional and response inhibitory processes and is directly affected by drugs such as cocaine. OBJECTIVES: We examined the potentially beneficial effects of the noradrenaline reuptake inhibitor atomoxetine in improving cognitive control during two tasks that used cocaine- and non-cocaine-related stimuli...
May 27, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28536846/time-on-task-effects-in-children-with-and-without-adhd-depletion-of-executive-resources-or-depletion-of-motivation
#2
Tycho J Dekkers, Joost A Agelink van Rentergem, Alette Koole, Wery P M van den Wildenberg, Arne Popma, Anika Bexkens, Reino Stoffelsen, Anouk Diekmann, Hilde M Huizenga
Children with attention-deficit/hyperactivity disorder (ADHD) are characterized by deficits in their executive functioning and motivation. In addition, these children are characterized by a decline in performance as time-on-task increases (i.e., time-on-task effects). However, it is unknown whether these time-on-task effects should be attributed to deficits in executive functioning or to deficits in motivation. Some studies in typically developing (TD) adults indicated that time-on-task effects should be interpreted as depletion of executive resources, but other studies suggested that they represent depletion of motivation...
May 23, 2017: European Child & Adolescent Psychiatry
https://www.readbyqxmd.com/read/28608744/methylphenidate-related-improvements-in-math-performance-cannot-be-explained-by-better-cognitive-functioning-or-higher-academic-motivation-evidence-from-a-randomized-controlled-trial
#3
Anne Fleur Kortekaas-Rijlaarsdam, Marjolein Luman, Edmund Sonuga-Barke, Pierre Bet, Jaap Oosterlaan
OBJECTIVE: This study investigated whether improvements in working memory, reaction time, lapses of attention, interference control, academic motivation, and perceived competence mediated effects of methylphenidate on math performance. METHOD: Sixty-three children (ADHD diagnosis; methylphenidate treatment; age 8-13; IQ > 70) were randomly allocated to a 7-day methylphenidate or placebo treatment in this double-blind placebo-controlled crossover study and compared with 67 controls...
June 1, 2017: Journal of Attention Disorders
https://www.readbyqxmd.com/read/28511579/does-an-attention-bias-to-appetitive-and-aversive-words-modulate-interference-control-in-youth-with-adhd
#4
Ili Ma, Gabry W Mies, Nanda N J Lambregts-Rommelse, Jan K Buitelaar, Antonius H N Cillessen, Anouk Scheres
Interference control refers to the ability to selectively attend to certain information while ignoring distracting information. This ability can vary as a function of distractor relevance. Distractors that are particularly relevant to an individual may attract more attention than less relevant distractors. This is referred to as attention bias. Weak interference control and altered reward sensitivity are both important features of attention deficit hyperactivity disorder (ADHD). However, interference control is typically studied in isolation...
May 16, 2017: Child Neuropsychology: a Journal on Normal and Abnormal Development in Childhood and Adolescence
https://www.readbyqxmd.com/read/28557437/differentiating-physicochemical-properties-between-addictive-and-nonaddictive-adhd-drugs-revealed-by-molecular-dynamics-simulation-studies
#5
Panpan Wang, Xiaoyu Zhang, Tingting Fu, Shuang Li, Bo Li, Weiwei Xue, Xiaojun Yao, Yuzong Chen, Feng Zhu
Attention-deficit/hyperactivity disorder (ADHD) is the most commonly diagnosed mental disorder of children and adolescents. Although psychostimulants are currently the first-line drugs for ADHD, their highly addictive profile raises great abuse concerns. It is known that psychostimulants' addictiveness is largely attributed to their interaction with dopamine transporter (DAT) and their binding modes in DAT can thus facilitate the understanding of the mechanism underlining drugs' addictiveness. However, no DAT residue able to discriminate ADHD drugs' addictiveness is identified, and the way how different drug structures affect their abuse liability is still elusive...
June 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/25998281/is-adult-adhd-a-childhood-onset-neurodevelopmental-disorder-evidence-from-a-four-decade-longitudinal-cohort-study
#6
Terrie E Moffitt, Renate Houts, Philip Asherson, Daniel W Belsky, David L Corcoran, Maggie Hammerle, HonaLee Harrington, Sean Hogan, Madeline H Meier, Guilherme V Polanczyk, Richie Poulton, Sandhya Ramrakha, Karen Sugden, Benjamin Williams, Luis Augusto Rohde, Avshalom Caspi
OBJECTIVE: Despite a prevailing assumption that adult ADHD is a childhood-onset neurodevelopmental disorder, no prospective longitudinal study has described the childhoods of the adult ADHD population. The authors report follow-back analyses of ADHD cases diagnosed in adulthood, alongside follow-forward analyses of ADHD cases diagnosed in childhood, in one cohort. METHOD: Participants belonged to a representative birth cohort of 1,037 individuals born in Dunedin, New Zealand, in 1972 and 1973 and followed to age 38, with 95% retention...
October 2015: American Journal of Psychiatry
https://www.readbyqxmd.com/read/28481903/attention-deficit-hyperactivity-disorder-delay-discounting-and-risky-financial-behaviors-a-preliminary-analysis-of-self-report-data
#7
Theodore P Beauchaine, Itzhak Ben-David, Aner Sela
Delay discounting-often referred to as hyperbolic discounting in the financial literature-is defined by a consistent preference for smaller, immediate rewards over larger, delayed rewards, and by failure of future consequences to curtail current consummatory behaviors. Previous research demonstrates (1) excessive delay discounting among individuals with attention-deficit/hyperactivity disorder (ADHD), (2) common neural substrates of delay discounting and hyperactive-impulsive symptoms of ADHD, and (3) associations between delay discounting and both debt burden and high interest rate borrowing...
2017: PloS One
https://www.readbyqxmd.com/read/28421658/transcriptional-signatures-of-connectomic-subregions-of-the-human-striatum
#8
Linden Parkes, Ben Fulcher, Murat Yücel, Alex Fornito
Functionally distinct regions of the brain are thought to possess a characteristic connectional fingerprint - a profile of incoming and outgoing connections that defines the function of that area. This observation has motivated efforts to subdivide brain areas using their connectivity patterns. However, it remains unclear whether these connectomically-defined subregions can be distinguished at the molecular level. Here, we combine high-resolution diffusion-weighted magnetic resonance imaging with transcriptomic data to show that connectomically-defined subregions of the striatum carry distinct transcriptional signatures...
April 19, 2017: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/28445519/the-effect-of-atomoxetine-on-random-and-directed-exploration-in-humans
#9
Christopher M Warren, Robert C Wilson, Nic J van der Wee, Eric J Giltay, Martijn S van Noorden, Jonathan D Cohen, Sander Nieuwenhuis
The adaptive regulation of the trade-off between pursuing a known reward (exploitation) and sampling lesser-known options in search of something better (exploration) is critical for optimal performance. Theory and recent empirical work suggest that humans use at least two strategies for solving this dilemma: a directed strategy in which choices are explicitly biased toward information seeking, and a random strategy in which decision noise leads to exploration by chance. Here we examined the hypothesis that random exploration is governed by the neuromodulatory locus coeruleus-norepinephrine system...
2017: PloS One
https://www.readbyqxmd.com/read/28423978/reward-processing-deficits-during-a-spatial-attention-task-in-patients-with-adhd-an-fmri-study
#10
Baris Metin, Zeynep C Tas, Merve Çebi, Ayşe Büyükaslan, Aysegül Soysal, Deniz Hatıloglu, Nevzat Tarhan
OBJECTIVE: In this study, we aimed to explore how cues signaling rewards and feedbacks about rewards are processed in ADHD. METHOD: Inside the scanner, 16 healthy children and 19 children with ADHD completed a spatial attention paradigm where cues informed about the availability of reward and feedbacks were provided about the earned reward. RESULTS: In ventral anterior thalamus (VA), the controls exhibited greater activation in response to reward-predicting cues, as compared with no-reward cues, whereby in the ADHD group, the reverse pattern was observed (nonreward > reward)...
April 1, 2017: Journal of Attention Disorders
https://www.readbyqxmd.com/read/28433093/impact-of-a-common-genetic-variation-associated-with-putamen-volume-on-neural-mechanisms-of-attention-deficit-hyperactivity-disorder
#11
Bing Xu, Tianye Jia, Christine Macare, Tobias Banaschewski, Arun L W Bokde, Uli Bromberg, Christian Büchel, Anna Cattrell, Patricia J Conrod, Herta Flor, Vincent Frouin, Jürgen Gallinat, Hugh Garavan, Penny Gowland, Andreas Heinz, Bernd Ittermann, Jean-Luc Martinot, Marie-Laure Paillère Martinot, Frauke Nees, Dimitri Papadopoulos Orfanos, Tomáš Paus, Luise Poustka, Michael N Smolka, Henrik Walter, Robert Whelan, Gunter Schumann, Sylvane Desrivières
OBJECTIVE: In a recent genomewide association study of subcortical brain volumes, a common genetic variation at rs945270 was identified as having the strongest effect on putamen volume, a brain measurement linked to familial risk for attention-deficit/hyperactivity disorder (ADHD). To determine whether rs945270 might be a genetic determinant of ADHD, its effects on ADHD-related symptoms and neural mechanisms of ADHD, such as response inhibition and reward sensitivity, were explored. METHOD: A large population sample of 1,834 14-year-old adolescents was used to test the effects of rs945270 on ADHD symptoms assessed through the Strengths and Difficulties Questionnaire and region-of-interest analyses of putamen activation by functional magnetic resonance imaging using the stop signal and monetary incentive delay tasks, assessing response inhibition and reward sensitivity, respectively...
May 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28444321/evidence-of-altered-brain-responses-to-nicotine-in-an-animal-model-of-adhd
#12
Guillaume L Poirier, Wei Huang, Kelly Tam, Joseph R DiFranza, Jean A King
Introduction: Individuals with attention deficit/hyperactivity disorder (ADHD) are susceptible to earlier and more severe nicotine addiction. To shed light on the relationship between nicotine and ADHD, we examined nicotine's effects on functional brain networks in an animal model of ADHD. Methods: Awake magnetic resonance imaging was used to compare functional connectivity in adolescent (postnatal day 44±2) males of the Spontaneously Hypertensive Rat (SHR) strain and two control strains, Wistar Kyoto and Sprague Dawley (n = 16 each)...
April 22, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28406942/the-brain-anatomy-of-attention-deficit-hyperactivity-disorder-in-young-adults-a-magnetic-resonance-imaging-study
#13
Jean-G Gehricke, Frithjof Kruggel, Tanyaporn Thampipop, Sharina Dyan Alejo, Erik Tatos, James Fallon, L Tugan Muftuler
BACKGROUND: This is one of the first studies to examine the structural brain anatomy and connectivity associated with an ADHD diagnosis and child as well as adult ADHD symptoms in young adults. It was hypothesized that an adult ADHD diagnosis and in particular childhood symptoms, are associated with widespread changes in the brain macro- and microstructure, which can be used to develop a morphometric biomarker for ADHD. METHODS: Voxel-wise linear regression models were used to examine structural and diffusion-weighted MRI data in 72 participants (31 young adults with ADHD and 41 controls without ADHD) in relation to diagnosis and the number of self-reported child and adult symptoms...
2017: PloS One
https://www.readbyqxmd.com/read/28446885/the-impact-of-inattention-hyperactivity-impulsivity-symptoms-and-executive-functions-on-learning-behaviors-of-children-with-adhd
#14
Carla Colomer, Carmen Berenguer, Belén Roselló, Inmaculada Baixauli, Ana Miranda
Children diagnosed with attention deficit/hyperactivity disorder (ADHD) are at risk of experiencing lower academic achievement compared to their peers without ADHD. However, we have a limited understanding of the mechanisms underlying this association. Both the symptoms of the disorder and the executive functions can negatively influence learning behaviors, including motivation, attitude toward learning, or persistence, key aspects of the learning process. The first objective of this study was to compare different components of learning behaviors in children diagnosed with ADHD and typically developing (TD) children...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28405786/maternal-responsiveness-as-a-predictor-of-self-regulation-development-and-attention-deficit-hyperactivity-symptoms-across-preschool-ages
#15
Ursula Pauli-Pott, Susan Schloß, Katja Becker
Preschool-age "hot" executive function capacity (i.e. reward-related effortful control) represents an early kind of self-regulation that is involved in social adjustment development as well as the development of subtypes of attention-deficit/hyperactivity disorder (ADHD). Early self-regulation development might be malleable by responsive parenting. We analyzed whether maternal responsiveness/sensitivity predicts reward-related control (RRC) development within the preschool period, and whether RRC mediates a negative link between maternal responsiveness and ADHD symptoms...
April 12, 2017: Child Psychiatry and Human Development
https://www.readbyqxmd.com/read/28373837/living-in-the-fast-lane-evidence-for-a-global-perceptual-timing-deficit-in-childhood-adhd-caused-by-distinct-but-partially-overlapping-task-dependent-cognitive-mechanisms
#16
Ivo Marx, Steffen Weirich, Christoph Berger, Sabine C Herpertz, Stefan Cohrs, Roland Wandschneider, Jacqueline Höppner, Frank Häßler
Dysfunctions in perceptual timing have been reported in children with ADHD, but so far only from studies that have not used the whole set of timing paradigms available from the literature, with the diversity of findings complicating the development of a unified model of timing dysfunctions and its determinants in ADHD. Therefore, we employed a comprehensive set of paradigms (time discrimination, time estimation, time production, and time reproduction) in order to explore the perceptual timing deficit profile in our ADHD sample...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28377736/differences-in-perceived-mental-effort-required-and-discomfort-during-a-working-memory-task-between-individuals-at-risk-and-not-at-risk-for-adhd
#17
Chia-Fen Hsu, John D Eastwood, Maggie E Toplak
Objective: The avoidance of mental effort is a symptom criterion for Attention-Deficit/Hyperactivity Disorder (ADHD), but the experience of mental effort has received relatively little attention in the empirical study of individuals at-risk for ADHD. We explored a novel method to assess the experience of effort and discomfort during a working memory task in a sample of young adults at-risk and not at-risk for ADHD. Method: A sample of 235 undergraduate students (Mean age = 21.02, 86 males) were included in this study...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28375718/trait-impulsivity-and-the-externalizing-spectrum
#18
Theodore P Beauchaine, Aimee R Zisner, Colin L Sauder
This article reviews evidence that trait impulsivity-expressed early in life as the hyperactive-impulsive and combined presentations of attention-deficit/hyperactivity disorder (ADHD)-is a bottom-up, subcortically mediated vulnerability to all externalizing disorders. This vulnerability arises from deficient mesolimbic dopamine responding, which imbues psychological states (irritability, discontentment) that motivate excessive approach behavior (hyperactivity, impulsivity). Through complex interactions with (a) aversive motivational states that arise from largely independent subcortical systems, (b) emotion regulatory mechanisms that arise from top-down, cortical modulation of subcortical neural function, and (c) environmental risk factors that shape and maintain emotion dysregulation, trait impulsivity confers vulnerability to increasingly severe externalizing behaviors across development...
May 8, 2017: Annual Review of Clinical Psychology
https://www.readbyqxmd.com/read/28289850/neurophysiological-correlates-of-attentional-fluctuation-in-attention-deficit-hyperactivity-disorder
#19
Celeste H M Cheung, Gráinne McLoughlin, Daniel Brandeis, Tobias Banaschewski, Philip Asherson, Jonna Kuntsi
Cognitive performance in attention-deficit/hyperactivity disorder (ADHD) is characterised, in part, by frequent fluctuations in response speed, resulting in high reaction time variability (RTV). RTV captures a large proportion of the genetic risk in ADHD but, importantly, is malleable, improving significantly in a fast-paced, rewarded task condition. Using the temporal precision offered by event-related potentials (ERPs), we aimed to examine the neurophysiological measures of attention allocation (P3 amplitudes) and preparation (contingent negative variation, CNV), and their associations with the fluctuating RT performance and its improvement in ADHD...
May 2017: Brain Topography
https://www.readbyqxmd.com/read/28317068/predicting-adhd-symptoms-in-adolescence-from-early-childhood-temperament-traits
#20
Tzlil Einziger, Linoy Levi, Yael Zilberman-Hayun, Judith G Auerbach, Naama Atzaba-Poria, Shoshana Arbelle, Andrea Berger
Extreme levels of certain temperament traits can be early markers of different developmental pathways of attention-deficit/hyperactivity disorder (ADHD). However, the long-term utility of using these traits as predictors of ADHD is not fully known. This study includes 64 male adolescents (M age = 13.5), who have been followed since birth as part of a longitudinal study. The primary aim was to test effortful control (EC), activity level, and anger, measured in early childhood - both with mother's reports and laboratory assessments -as predictors of ADHD symptoms in adolescence...
March 20, 2017: Journal of Abnormal Child Psychology
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