101
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Top-down control of the medial orbitofrontal cortex to nucleus accumbens core pathway in decisional impulsivity. Brain Struct Funct 2019; 224:2437-2452. [DOI: 10.1007/s00429-019-01913-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 06/14/2019] [Indexed: 02/03/2023]
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102
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Addicott MA, Schechter JC, Sapyta JJ, Selig JP, Kollins SH, Weiss MD. Methylphenidate increases willingness to perform effort in adults with ADHD. Pharmacol Biochem Behav 2019; 183:14-21. [PMID: 31226260 DOI: 10.1016/j.pbb.2019.06.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/31/2019] [Accepted: 06/16/2019] [Indexed: 10/26/2022]
Abstract
BACKGROUND A reduced willingness to perform effort based on the magnitude and probability of potential rewards has been associated with diminished dopamine function and may be relevant to attention-deficit/hyperactivity disorder (ADHD). Here, we investigated the influence of ADHD status and methylphenidate on effort-based decisions. We hypothesized that ADHD participants would make fewer high-effort selections than non-ADHD subjects, and that methylphenidate would increase the number of high-effort selections. Furthermore, we hypothesized there would be associations among ADHD severity and methylphenidate-related changes in effort-based and attentional performance across all participants. METHODS AND PARTICIPANTS ADHD (n = 23) and non-ADHD (n = 23) adults completed the Effort Expenditure for Rewards Task in which participants select between low-effort and high-effort options to receive monetary rewards at varying levels of reward magnitude and probability. A test of attentional performance was also completed. RESULTS Overall, participants made more high-effort selections as potential reward magnitude and probability increased. ADHD participants did not make fewer high-effort selections than non-ADHD participants, but ADHD participants showed greater methylphenidate-related increases in high-effort selections. ADHD participants had worse attentional performance than non-ADHD participants. ADHD severity was associated with methylphenidate-related changes in high-effort selections, but not changes in attentional performance. CONCLUSIONS These results indicate that methylphenidate increases the willingness to perform effort in individuals with ADHD, possibly due to disorder-related motivational deficits. This provides support for theories of insufficient effort allocation among individuals with ADHD. TRIAL REGISTRATION Clinicaltrials.gov Identifier, NCT02630017.
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Affiliation(s)
| | | | | | - James P Selig
- University of Arkansas for Medical Sciences, United States of America
| | - Scott H Kollins
- Duke University School of Medicine, United States of America
| | - Margaret D Weiss
- University of Arkansas for Medical Sciences, United States of America
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103
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Effects of Exercise on Cognitive Performance in Children and Adolescents with ADHD: Potential Mechanisms and Evidence-based Recommendations. J Clin Med 2019; 8:jcm8060841. [PMID: 31212854 PMCID: PMC6617109 DOI: 10.3390/jcm8060841] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/04/2019] [Accepted: 06/06/2019] [Indexed: 12/14/2022] Open
Abstract
Attention Deficit Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder with a complex symptomatology, and core symptoms as well as functional impairment often persist into adulthood. Recent investigations estimate the worldwide prevalence of ADHD in children and adolescents to be ~7%, which is a substantial increase compared to a decade ago. Conventional treatment most often includes pharmacotherapy with central nervous stimulants, but the number of non-responders and adverse effects call for treatment alternatives. Exercise has been suggested as a safe and low-cost adjunctive therapy for ADHD and is reported to be accompanied by positive effects on several aspects of cognitive functions in the general child population. Here we review existing evidence that exercise affects cognitive functions in children with and without ADHD and present likely neurophysiological mechanisms of action. We find well-described associations between physical activity and ADHD, as well as causal evidence in the form of small to moderate beneficial effects following acute aerobic exercise on executive functions in children with ADHD. Despite large heterogeneity, meta-analyses find small positive effects of exercise in population-based control (PBC) children, and our extracted effect sizes from long-term interventions suggest consistent positive effects in children and adolescents with ADHD. Paucity of studies probing the effect of different exercise parameters impedes finite conclusions in this regard. Large-scale clinical trials with appropriately timed exercise are needed. In summary, the existing preliminary evidence suggests that exercise can improve cognitive performance intimately linked to ADHD presentations in children with and without an ADHD diagnosis. Based on the findings from both PBC and ADHD children, we cautiously provide recommendations for parameters of exercise.
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104
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He J, Ning H, Huang R. Low blood lead levels and attention-deficit hyperactivity disorder in children: a systematic review and meta-analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:17875-17884. [PMID: 28780688 DOI: 10.1007/s11356-017-9799-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
Attention-deficit hyperactivity disorder (ADHD) of children is one of the most common neurodevelopmental diseases; the etiology remains unclear. We reviewed and meta-analyzed case-control studies to assess the effects of blood lead levels in children on ADHD symptoms. Relevant studies were identified by searching electronic databases. A meta-analysis was performed using the fixed model of Review Manager 5.3 software. Seven relevant studies were identified. The case groups exhibited significant increases in ADHD symptoms [mean difference (MD), 0.59; 95% confidence interval (CI), 0.50-0.68; p < 0.0001]. Subgroup assessment showed that even children with blood lead levels <3 μg/dL exhibited significant increases in ADHD symptoms (MD, 0.47; 95% CI, 0.39-0.56; p < 0.0001). Subgroup assessment also showed that children aged 5-12 years exhibited more significant increases in ADHD symptoms (MD, 1.35; 95% CI, 0.28-2.41; p < 0.0001) than children aged >12 years. Our findings suggest that low blood lead levels may be associated with ADHD symptoms in children. However, caution is needed when interpreting the results because among-study heterogeneity was in play. Primary interventions should focus on children with low blood lead levels.
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Affiliation(s)
- Jianjun He
- Changsha Medical University, Changsha, China
| | - Huacheng Ning
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, Hunan Province, 410078, China
| | - Ruixue Huang
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, Hunan Province, 410078, China.
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105
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Prenatal testosterone exposure is associated with delay of gratification and attention problems/overactive behavior in 3-year-old boys. Psychoneuroendocrinology 2019; 104:49-54. [PMID: 30802710 DOI: 10.1016/j.psyneuen.2019.02.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 12/22/2022]
Abstract
Sex differences in self-control become apparent during preschool years. Girls are better able to delay their gratification and show less attention problems and overactive behavior than boys. In this context, organizational effects of gonadal steroids affecting the neural circuitry underlying self-control could be responsible for these early sex differences. In the present study testosterone levels measured in amniotic fluid (via ultra performance liquid chromatography and tandem mass spectrometry) were used to examine the role of organizational sex hormones on self-control. One hundred and twenty-two 40-month-old children participated in a delay of gratification task (DoG task) and their parents reported on their attention problems and overactive behavior. Girls waited significantly longer for their preferred reward than boys, and significantly more girls than boys waited the maximum period of time, providing evidence for sex differences in delay of gratification. Boys that were rated as suffering from more attention problems and overactive behavior waited significantly shorter in the DoG task. Amniotic testosterone measures were reliable in boys only. Most importantly, boys who waited shorter in the DoG task and boys who were reported to suffer from more attention problems and overactive behavior had higher prenatal testosterone levels. These findings extend our knowledge concerning organizational effects of testosterone on the brain circuitry underlying self-control in boys, and are of relevance for understanding how sex differences in behavioral disorders are connected with a lack of self-control.
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106
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Besteher B, Gaser C, Nenadić I. Brain structure and trait impulsivity: A comparative VBM study contrasting neural correlates of traditional and alternative concepts in healthy subjects. Neuropsychologia 2019; 131:139-147. [PMID: 31071323 DOI: 10.1016/j.neuropsychologia.2019.04.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/08/2019] [Accepted: 04/24/2019] [Indexed: 12/16/2022]
Abstract
Impulsivity as a trait modulates a range of cognitive functions, e.g. planning, decision-making, or response inhibition. Recent behavioural and psychometric findings challenge both the neurobiological models as well as the conceptualisation of psychometric measures of impulsivity. In the present study, we aimed to test the association of brain structure with the Barratt Impulsiveness Scale (BIS-11), a commonly applied self-rating instrument for impulsivity, using both the classical three-factor-model for impulsive behaviour (motor (IM), attentional (IA) and non-planning impulsivity (INP)), as well as the recently proposed alternative model contrasting inability to wait for reward (IWR) as an index of impulsive choice and rapid response style (RRS) as an index of impulsive action. We analysed brain structural data in a community sample of 85 healthy individuals, who completed the BIS-11, using voxel-based morphometry (CAT12: Computational Anatomy Toolbox 12). Regional volumes were correlated with the three traditional BIS-11 subscales, as well as IWR and RRS. BIS-11 total score was positively correlated with right inferior parietal, postcentral, and supramarginal grey matter (p < 0.05, FWE cluster-level corrected). Attentional impulsivity (IA) was also positively correlated with right inferior and superior parietal and supramarginal gyri. Comparison of the other scales did show some divergence, but most correlations did not survive correction for multiple comparisons. Our findings suggest that difference facets of trait impulsivity might be related to different brain areas, and might thus dissociate along distinct but overlapping neural networks. In contrast to lesion or patient studies, these analyses delineate physiological variance, and can thus help to conceptualise network models in the absence of pathology.
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Affiliation(s)
- Bianca Besteher
- Department of Psychiatry and Psychotherapy, Jena University Hospital, Jena, Germany.
| | - Christian Gaser
- Department of Psychiatry and Psychotherapy, Jena University Hospital, Jena, Germany; Department of Neurology, Jena University Hospital, Jena, Germany
| | - Igor Nenadić
- Department of Psychiatry and Psychotherapy, Philipps-Universität Marburg / Marburg University Hospital - UKGM, Marburg, Germany
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107
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Models of attention-deficit hyperactivity disorder. Behav Processes 2019; 162:205-214. [DOI: 10.1016/j.beproc.2019.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 01/16/2019] [Accepted: 01/16/2019] [Indexed: 12/25/2022]
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108
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Gordon CT, Hinshaw SP. Executive Functions in Girls With and Without Childhood ADHD Followed Through Emerging Adulthood: Developmental Trajectories. JOURNAL OF CLINICAL CHILD AND ADOLESCENT PSYCHOLOGY 2019; 49:509-523. [PMID: 31039045 DOI: 10.1080/15374416.2019.1602840] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Using an all-female sample, we examined trajectories of executive functioning (EF) performance from childhood through emerging adulthood-and their prediction of key emerging-adult outcomes. One hundred forty girls carefully diagnosed with attention deficit/hyperactivity disorder (ADHD) and 88 matched comparison girls were administered EF measurements assessing global EF, response inhibition, and verbal working memory during childhood (M age = 9.5 years), adolescence (M age = 14.1 years), the earliest years of adulthood (M age = 19.6 years), and the end of emerging adulthood (M age = 25.6 years). Retention rates were excellent. Hierarchical linear modeling was used to estimate growth curves for each EF measure. The linear EF slopes were then used to explore how changes in EF interacted with each participant's persistence/remission of ADHD over time to influence behavioral, emotional, and academic impairment in emerging adulthood. Although all women experienced absolute improvements in EF performance across time, women with histories of ADHD consistently lagged behind comparison women, even if their ADHD symptoms had remitted by early adulthood. However, EF performance over time did not significantly influence the link between ADHD status and (a) maternal reports of associated behavioral and emotional impairment or (b) objective measures of academic achievement. These findings indicate that EF deficits should be considered when developing and implementing treatments for ADHD through emerging adulthood. Future research should be aimed at understanding the mechanisms behind these observed trajectory differences.
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Affiliation(s)
- Chanelle T Gordon
- Department of Psychology, University at Buffalo, State University of New York
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109
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Hernandez CM, Orsini CA, Labiste CC, Wheeler AR, Ten Eyck TW, Bruner MM, Sahagian TJ, Harden SW, Frazier CJ, Setlow B, Bizon JL. Optogenetic dissection of basolateral amygdala contributions to intertemporal choice in young and aged rats. eLife 2019; 8:46174. [PMID: 31017572 PMCID: PMC6530979 DOI: 10.7554/elife.46174] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 04/23/2019] [Indexed: 11/13/2022] Open
Abstract
Across species, aging is associated with an increased ability to choose delayed over immediate gratification. These experiments used young and aged rats to test the role of the basolateral amygdala (BLA) in intertemporal decision making. An optogenetic approach was used to inactivate the BLA in young and aged rats at discrete time points during choices between levers that yielded a small, immediate vs. a large, delayed food reward. BLA inactivation just prior to decisions attenuated impulsive choice in both young and aged rats. In contrast, inactivation during receipt of the small, immediate reward increased impulsive choice in young rats but had no effect in aged rats. BLA inactivation during the delay or intertrial interval had no effect at either age. These data demonstrate that the BLA plays multiple, temporally distinct roles during intertemporal choice, and show that the contribution of BLA to choice behavior changes across the lifespan.
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Affiliation(s)
- Caesar M Hernandez
- Department of Neuroscience, University of Florida, Gainesville, United States
| | - Caitlin A Orsini
- Department of Psychiatry, University of Florida, Gainesville, United States
| | - Chase C Labiste
- Department of Neuroscience, University of Florida, Gainesville, United States
| | - Alexa-Rae Wheeler
- Department of Neuroscience, University of Florida, Gainesville, United States
| | - Tyler W Ten Eyck
- Department of Neuroscience, University of Florida, Gainesville, United States
| | - Matthew M Bruner
- Department of Neuroscience, University of Florida, Gainesville, United States
| | - Todd J Sahagian
- Department of Pharmacodynamics, University of Florida, Gainesville, United States
| | - Scott W Harden
- Department of Pharmacodynamics, University of Florida, Gainesville, United States
| | - Charles J Frazier
- Department of Pharmacodynamics, University of Florida, Gainesville, United States
| | - Barry Setlow
- Department of Psychiatry, University of Florida, Gainesville, United States
| | - Jennifer L Bizon
- Department of Neuroscience, University of Florida, Gainesville, United States
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110
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Peviani KM, Kahn RE, Maciejewski D, Bickel WK, Deater-Deckard K, King-Casas B, Kim-Spoon J. Intergenerational transmission of delay discounting: The mediating role of household chaos. J Adolesc 2019; 72:83-90. [PMID: 30875564 PMCID: PMC6450567 DOI: 10.1016/j.adolescence.2019.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Adolescence is a period when impulsive decision making may be especially vulnerable to environmental influences. Impulsive decision making is often assessed using a delay discounting paradigm, which measures the preference for smaller rewards sooner over larger rewards with a delay. Research is needed to clarify the relationship between parents' and adolescents' delay discounting and to identify related environmental processes that might facilitate the intergenerational transmission of delay discounting. The current prospective longitudinal study examined the competing mediating processes of household chaos and harsh parenting in the intergenerational transmission of delay discounting between parents and adolescents. METHODS Participants included 167 adolescents (mean age = 14.07 years at Time 1; 53% male) and their parents (mean age = 41.98 years at Time 1; 87% female) recruited from the southeast United States. Parents' delay discounting was collected at Time 1, and adolescents' delay discounting was collected both at Time 1 and at Time 3 via a computerized delay discounting task. Parents and adolescents reported household chaos and harsh parenting at Time 2. RESULTS A parallel mediation model indicated that parents' delay discounting at Time 1 indirectly predicted adolescents' delay discounting Time 3 residualized change scores (regressing Time 3 delay discounting onto baseline delay discounting) through household chaos but not through harsh parenting at Time 2. CONCLUSIONS These results underline the importance of household chaos in facilitating the intergenerational transmission of delay discounting between parents and adolescents. Furthermore, our findings point to household chaos as a potential environmental target for interrupting intergenerational impulsivity.
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Affiliation(s)
- Kristin M Peviani
- Department of Psychology, Virginia Tech. 109 Williams Hall, Blacksburg, VA, 24061, United States.
| | - Rachel E Kahn
- Department of Psychology, Virginia Tech. 109 Williams Hall, Blacksburg, VA, 24061, United States
| | - Dominique Maciejewski
- Department of Psychology, Virginia Tech. 109 Williams Hall, Blacksburg, VA, 24061, United States
| | - Warren K Bickel
- Department of Psychology, Virginia Tech. 109 Williams Hall, Blacksburg, VA, 24061, United States; Fralin Biomedical Research Institute at VTC, 2 Riverside Circle, Roanoke, VA, 24016, United States
| | - Kirby Deater-Deckard
- Department of Psychological and Brain Sciences, University of Massachusetts, Amherst. 135 Hicks Way/Tobin Hall, Amherst, MA, 01003, United States
| | - Brooks King-Casas
- Department of Psychology, Virginia Tech. 109 Williams Hall, Blacksburg, VA, 24061, United States; Fralin Biomedical Research Institute at VTC, 2 Riverside Circle, Roanoke, VA, 24016, United States
| | - Jungmeen Kim-Spoon
- Department of Psychology, Virginia Tech. 109 Williams Hall, Blacksburg, VA, 24061, United States
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111
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Altgassen M, Scheres A, Edel MA. Prospective memory (partially) mediates the link between ADHD symptoms and procrastination. ACTA ACUST UNITED AC 2019; 11:59-71. [PMID: 30927231 DOI: 10.1007/s12402-018-0273-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 10/08/2018] [Indexed: 12/28/2022]
Abstract
Individuals with attention deficit hyperactivity disorder (ADHD) often show poor planning and poor organization of tasks and activities which has been related to reduced memory for delayed intentions (prospective memory) and procrastination-in addition to other cognitive or motivational factors. This study set out to bring the fields of prospective memory and procrastination research together and to explore possible relations between the two constructs in ADHD. Twenty-nine adults with ADHD and 24 healthy controls performed several laboratory-based and real-life prospective memory tasks and filled in questionnaires measuring their symptom severity and procrastination behaviour. Overall, individuals' with ADHD showed clear deficits in everyday prospective memory performance. Individuals with ADHD recalled and executed less of their own real-life intentions. Moreover, there were clear links between everyday prospective memory performance and reported procrastination behaviour, and everyday prospective memory performance mediated the link between ADHD symptoms and procrastination behaviour.
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Affiliation(s)
- Mareike Altgassen
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, PO Box 9104, 6500 HE, Nijmegen, The Netherlands.
| | - Anouk Scheres
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands
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112
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Pollak Y, Dekkers TJ, Shoham R, Huizenga HM. Risk-Taking Behavior in Attention Deficit/Hyperactivity Disorder (ADHD): a Review of Potential Underlying Mechanisms and of Interventions. Curr Psychiatry Rep 2019; 21:33. [PMID: 30903380 DOI: 10.1007/s11920-019-1019-y] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
PURPOSE OF REVIEW Attention deficit/hyperactivity disorder (ADHD) is associated with several forms of risk-taking behavior (RTB). This paper aims to examine the scope of ADHD-related RTB, to highlight potential underlying mechanisms of this association, and to review initial evidence for interventions aimed to treat ADHD-related RTB. RECENT FINDINGS Multiple lines of evidence indicate that ADHD is associated with real-life RTB across several domains (e.g., reckless driving, substance use, and unprotected sex), which is corroborated by evidence on laboratory risk-taking tasks. Several individual differences, some of them informed by decision theory, e.g., comorbid disorders, parental monitoring, and perceived enlarged benefits of RTB, may explain the link between ADHD and RTB. A number of studies showed that interventions designed for ADHD may reduce RTB. ADHD is linked to RTB across several domains. Decision theory may serve as a conceptual framework for understanding the underlying mechanisms, and thus may inform future research.
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Affiliation(s)
- Yehuda Pollak
- The Seymour Fox School of Education, The Hebrew University of Jerusalem, Jerusalem, Israel.
| | - Tycho J Dekkers
- Department of Psychology, University of Amsterdam, Amsterdam, The Netherlands.,Department of Forensic Youth Psychiatry and Complex Behavioral Disorders, De Bascule, Academic Center for Child and Adolescent Psychiatry, Duivendrecht, The Netherlands
| | - Rachel Shoham
- Department of Psychology, The Hebrew University of Jerusalem, Jerusalem, Israel.,Special Education Department, Talpiot College, Holon, Israel
| | - Hilde M Huizenga
- Department of Psychology, University of Amsterdam, Amsterdam, The Netherlands.,Amsterdam Brain and Cognition Center, University of Amsterdam, Amsterdam, The Netherlands.,Research Priority Area Yield, University of Amsterdam, Amsterdam, The Netherlands
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113
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Closing the Loop Between Circadian Rhythms, Sleep, and Attention Deficit Hyperactivity Disorder. HANDBOOK OF SLEEP RESEARCH 2019. [DOI: 10.1016/b978-0-12-813743-7.00047-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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114
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Abstract
Development of the frontal lobe is critical to acquisition, execution, and control of a wide range of functions, from basic motor response to complex decision-making. These functions are influenced by contingency-based (e.g., reward and response-cost/punishment) feedback that is mediated through the adaptive integration of fronto-subcortical neural circuitry. The frontal lobe manages incoming information and chooses the appropriate action based on one's goals in a particular context. This aspect of frontal function, while only one component, is crucial to development and maintenance of approach and avoidance behavior central to all human (and animal) behavior. Furthermore, disruptions in fronto-subcortical circuitry governing motivated behavior appear to contribute to a range of developmental disorders, including attention-deficit/hyperactivity disorder (ADHD), and confer vulnerability for psychopathology more broadly. The particular deficits that manifest in altered behavior depend upon the specific circuitry that is compromised due to the functional specificity of distinct regions of the frontal lobe and its interconnections with subcortical structures. Neurobiologic models of motivated behavior provide a valuable framework for characterizing developmental disorders from a transdiagnostic dimensional systems perspective. Improved characterization of approach and avoidance motivation across neurodevelopmental disorders has the potential to inform the development of novel interventions and personalized medicine.
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Affiliation(s)
- Keri Shiels Rosch
- Center for Neurodevelopmental and Imaging Research, Kennedy Krieger Institute, Baltimore, MD, United States.
| | - Stewart Mostofsky
- Center for Neurodevelopmental and Imaging Research, Kennedy Krieger Institute, Baltimore, MD, United States
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115
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Rosch KS, Mostofsky SH, Nebel MB. ADHD-related sex differences in fronto-subcortical intrinsic functional connectivity and associations with delay discounting. J Neurodev Disord 2018; 10:34. [PMID: 30541434 PMCID: PMC6292003 DOI: 10.1186/s11689-018-9254-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 11/14/2018] [Indexed: 01/12/2023] Open
Abstract
Background Attention-deficit/hyperactivity disorder (ADHD) is associated with atypical fronto-subcortical neural circuitry and heightened delay discounting, or a stronger preference for smaller, immediate rewards over larger, delayed rewards. Recent evidence of ADHD-related sex differences in brain structure and function suggests anomalies in fronto-subcortical circuitry may differ among girls and boys with ADHD. The current study examined whether the functional connectivity (FC) within fronto-subcortical neural circuitry differs among girls and boys with ADHD compared to same-sex typically developing (TD) controls and relates to delay discounting. Methods Participants include 8–12-year-old children with ADHD (n = 72, 20 girls) and TD controls (n = 75, 21 girls). Fronto-subcortical regions of interest were functionally defined by applying independent component analysis to resting-state fMRI data. Intrinsic FC between subcortical components, including the striatum and amygdala, and prefrontal components, including ventromedial prefrontal cortex (vmPFC), anterior cingulate cortex (ACC), and anterior dorsolateral prefrontal cortex (dlPFC), was compared across diagnostic groups overall and within sex. Correlations between intrinsic FC of the six fronto-subcortical pairs and delay discounting were also examined. Results Both girls and boys with ADHD show atypical FC between vmPFC and subcortical regions including the striatum (stronger positive FC in ADHD) and amygdala (weaker negative FC in ADHD), with the greatest diagnostic effects among girls. In addition, girls with ADHD show atypical intrinsic FC between the striatum and dlPFC components, including stronger positive FC with ACC and stronger negative FC with dlPFC. Further, girls but not boys, with ADHD, show heightened real-time delay discounting. Brain–behavior correlations suggest (1) stronger negative FC between the striatal and dlPFC components correlated with greater money delay discounting across all participants and (2) stronger FC between the amygdala with both the dlPFC and ACC components was differentially related to heightened real-time discounting among girls and boys with and without ADHD. Conclusions Our findings suggest fronto-subcortical functional networks are affected in children with ADHD, particularly girls, and relate to delay discounting. These results also provide preliminary evidence of greater disruptions in fronto-subcortical FC among girls with ADHD that is not due to elevated inattention symptom severity, intellectual reasoning ability, age, or head motion. Electronic supplementary material The online version of this article (10.1186/s11689-018-9254-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Keri S Rosch
- Center for Neurodevelopmental and Imaging Research, Kennedy Krieger Institute, Baltimore, MD, 21205, USA. .,Department of Neuropsychology, Kennedy Krieger Institute, Baltimore, MD, 21205, USA. .,Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
| | - Stewart H Mostofsky
- Center for Neurodevelopmental and Imaging Research, Kennedy Krieger Institute, Baltimore, MD, 21205, USA.,Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mary Beth Nebel
- Center for Neurodevelopmental and Imaging Research, Kennedy Krieger Institute, Baltimore, MD, 21205, USA.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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116
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Pievsky MA, McGrath RE. The Neurocognitive Profile of Attention-Deficit/Hyperactivity Disorder: A Review of Meta-Analyses. Arch Clin Neuropsychol 2018; 33:143-157. [PMID: 29106438 DOI: 10.1093/arclin/acx055] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 06/21/2017] [Indexed: 11/12/2022] Open
Abstract
Objective Numerous meta-analyses have summarized studies comparing the neurocognitive performance of individuals with attention-deficit/hyperactivity disorder (ADHD) to that of healthy controls. Method The present study is a systematic review and quantitative summary of those meta-analyses that aimed to determine the extent to which individuals with ADHD differ cognitively from typically developing controls. Results Of 253 standardized mean differences (SMDs) drawn from 34 meta-analyses, 244 (96%) were positive, indicating better neurocognitive performance in the control group than the ADHD group. The mean effect size was .45 (SD = .27). Unweighted means of SMDs for neurocognitive domains ranged from .35 (set shifting) to .54 (working memory). When weighted by the number of studies aggregated, they ranged from .35 (set shifting) to .66 (reaction time variability). Neurocognitive domains with mean effects over .50 included working memory (.54), reaction time variability (.53), response inhibition (.52), intelligence/achievement (.51), and planning/organization (.51). When weighted by number of aggregated studies, the domains with mean effects over .50 were reaction time variability (.66), intelligence/achievement (.60), vigilance (.56), working memory (.54), and response inhibition (.52). Age moderated the relationship between ADHD diagnosis and neurocognitive functioning, with greater between-groups differences among children and adults than among adolescents. Funding also moderated this relationship: meta-analyses that received drug funding found larger effect sizes than those without drug funding. Conclusions The evidence suggests that ADHD is associated with substantial deficits across a variety of neurocognitive domains. This is the most in-depth review of the neurocognitive functioning of people with ADHD to date.
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Affiliation(s)
| | - Robert E McGrath
- School of Psychology, Fairleigh Dickinson University, Teaneck, NJ, USA
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117
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Utsumi DA, Miranda MC. Temporal discounting and attention-deficit/hyperactivity disorder in childhood: reasons for devising different tasks. TRENDS IN PSYCHIATRY AND PSYCHOTHERAPY 2018; 40:248-252. [PMID: 30234887 DOI: 10.1590/2237-6089-2017-0094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/21/2017] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Temporal discounting (TD) describes how a certain reward is seen as less valuable the more its delivery is postponed. There are two main types of TD tasks, hypothetical and real, both of which use monetary rewards. Over the last few years, however, variants of these tasks have been adjusted to assess clinical groups of children showing impulsivity as found in attention-deficit/hyperactivity disorder (ADHD). OBJECTIVE To review and discuss studies conducted over the last 10 years on the use of TD tasks in the assessment of pediatric patients with ADHD. METHOD For this literature review, articles were non-systematically selected from PubMed, MEDLINE and SciELO databases to include experimental studies on the use of at least one TD paradigm to assess and distinguish ADHD and non-ADHD groups. RESULTS Of the studies assessed, 76.19% used hypothetical tasks, followed by real tasks (28.57%), and, finally, tasks using different types of reward, such as toys or rewarding activities (14.28%). CONCLUSIONS Although assessed in few studies, real and alternative tasks appeared to be effective in differentiating clinical groups and suitable for investigating hot executive functions in childhood.
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Affiliation(s)
- Daniel Augusto Utsumi
- Departamento de Psicobiologia, Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil
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Mori M, Tsutsui-Kimura I, Mimura M, Tanaka KF. 5-HT 3 antagonists decrease discounting rate without affecting sensitivity to reward magnitude in the delay discounting task in mice. Psychopharmacology (Berl) 2018; 235:2619-2629. [PMID: 29955899 DOI: 10.1007/s00213-018-4954-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 06/19/2018] [Indexed: 01/15/2023]
Abstract
RATIONALE Impulsive choice has often been evaluated in rodents according to the proportion of choices for the delayed large magnitude reinforcer (%large choice) in a delay-discounting task (DDT). However, because %large choice is influenced by both sensitivity to reinforcer magnitude and sensitivity to delayed reinforcement (i.e., discounting rate), distinctively evaluating such discounting parameters represents a critical issue demanding methods to determine each parameter in rats. The serotonin (5-HT) system is well known to be involved in impulsive choice; nevertheless, only a few studies have distinguished discounting parameters and investigated how 5-HT modulators affect discounting rate. OBJECTIVE Here, we performed a discounting parameter analysis in mice and examined the effects of various 5-HT modulators on discounting rate. METHODS We set up DDTs with different delay schedules to determine which schedule could address delay-discounting rates in mice. We examined the effect of the following drugs on impulsive choice: a 5-HT reuptake inhibitor (paroxetine), a 5-HT1A receptor agonist (8-OH-DPAT), and two 5-HT3 receptor antagonists (granisetron and ondansetron). RESULTS Mice showed typical delay discounting at the shorter delay schedules (up to 4 s delay). The %large choice under shorter, but not longer, schedules followed an exponential function and allowed us to derive discounting rates. We selected a DDT with a 4-s delay schedule for further experiments. Granisetron and ondansetron, but not paroxetine or 8-OH-DPAT, decreased discounting rates without affecting sensitivity to reinforcer magnitude. CONCLUSION We found that a method to calculate discounting rates in rats is also applicable to mouse models. We also provided evidence that 5-HT3 antagonism controls impulsive choice in mice.
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Affiliation(s)
- Marina Mori
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Iku Tsutsui-Kimura
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, 160-8582, Japan. .,Center for Brain Science, Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, 02138, USA. .,JSPS Overseas Research Fellow, Tokyo, 102-0083, Japan.
| | - Masaru Mimura
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Kenji F Tanaka
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, 160-8582, Japan.
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Low AM, le Sommer J, Vangkilde S, Fagerlund B, Glenthøj B, Sonuga-Barke E, Habekost T, Jepsen JRM. Delay Aversion and Executive Functioning in Adults With Attention-Deficit/Hyperactivity Disorder: Before and After Stimulant Treatment. Int J Neuropsychopharmacol 2018; 21:997-1006. [PMID: 30124878 PMCID: PMC6209856 DOI: 10.1093/ijnp/pyy070] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 08/14/2018] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Attention deficit hyperactivity disorder is a heterogeneous disorder, associated with deficits in motivation (e.g., delay aversion) and cognition. Methylphenidate is recommended as a first line treatment for attention deficit hyperactivity disorder symptoms, but little is known about its nonacute effects on motivational and cognitive deficits, particularly in adults with attention deficit hyperactivity disorder. METHODS We utilized a prospective, non-randomized, non-blinded, 6-week follow-up design with 42 initially stimulant medication-naïve adult patients with moderate to severe attention deficit hyperactivity disorder, and 42 age- and parental education-matched healthy controls. Delay aversion and executive functioning were assessed with 2 questionnaires and 5 performance-based tests. RESULTS At baseline, patients and controls differed significantly on performance-based measures (moderate to large effect sizes), and self-report of delay aversion and executive functioning (very large effect sizes). Treatment with methylphenidate medication (mean dose 65.54 mg/d, SD=10.39) was not associated with improvements in performance-based measures of delay aversion and executive functioning compared to controls, although improvements in self-report executive functioning and delay aversion were found. Self-reported delay aversion was most consistently associated with ADHD symptomatology at baseline and after medication. CONCLUSION Methylphenidate treatment does not have an effect on performance-based measures of delay aversion and executive functioning, but may have significant effects on self-reported delay aversion and executive functioning. The latter finding should be interpreted cautiously, given the subjective nature of these measures and design limitations. Self-reported delay aversion is most consistently associated with attention deficit hyperactivity disorder symptomatology.
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Affiliation(s)
- Ann-Marie Low
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark,Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Copenhagen, Denmark,Correspondence: Ann-Marie Low, Department of Psychology, University of Copenhagen, Østre Farimagsgade 2A, 1353 Copenhagen K, Denmark ()
| | - Julijana le Sommer
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Copenhagen, Denmark,Faculty of Health and Medical Sciences, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Signe Vangkilde
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Birgitte Fagerlund
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark,Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Copenhagen, Denmark
| | - Birte Glenthøj
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Copenhagen, Denmark,Faculty of Health and Medical Sciences, Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Edmund Sonuga-Barke
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology & Neuroscience, King’s College, London, United Kingdom
| | - Thomas Habekost
- Department of Psychology, University of Copenhagen, Copenhagen, Denmark
| | - Jens Richardt Møllegaard Jepsen
- Center for Neuropsychiatric Schizophrenia Research and Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research, Mental Health Centre Glostrup, University of Copenhagen, Copenhagen, Denmark,Child and Adolescent Mental Health Center, Mental Health Services, Copenhagen, Denmark
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Mies GW, de Water E, Wiersema JR, Scheres A. Delay discounting of monetary gains and losses in adolescents with ADHD: Contribution of delay aversion to choice. Child Neuropsychol 2018; 25:528-547. [PMID: 30111229 DOI: 10.1080/09297049.2018.1508563] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Adolescents with attention-deficit/hyperactivity disorder (ADHD) are known to have stronger preferences for smaller immediate rewards over larger delayed rewards in delay discounting tasks than their peers, which has been argued to reflect delay aversion. Here, participants performed a delay discounting task with gains and losses. In this latter condition, participants were asked whether they were willing to wait in order to lose less money. Following the core assumption of the delay aversion model that individuals with ADHD have a general aversion to delay, one would predict adolescents with ADHD to avoid waiting in both conditions. Adolescents (12-17 years) with ADHD (n = 29) and controls (n = 28) made choices between smaller immediate and larger delayed gains, and between larger immediate and smaller delayed losses. All delays (5-25 s) and gains/losses (2-10 cents) were experienced. In addition to an area under the curve approach, a mixed-model analysis was conducted to disentangle the contributions of delay duration and immediate gain/delayed loss amount to choice. The ADHD group chose the immediate option more often than controls in the gain condition, but not in the loss condition. The contribution of delay duration to immediate choices was stronger for the ADHD group than the control group in the gain condition only. In addition, the ADHD group scored higher on self-reported delay aversion, and delay aversion was associated with delay sensitivity in the gain condition, but not in the loss condition. In sum, we found no clear evidence for a general aversion to delay in adolescents with ADHD.
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Affiliation(s)
- Gabry W Mies
- a Behavioural Science Institute , Radboud University , Nijmegen , The Netherlands
| | - Erik de Water
- a Behavioural Science Institute , Radboud University , Nijmegen , The Netherlands
| | - Jan R Wiersema
- b Department of Experimental Clinical and Health Psychology , Ghent University , Ghent , Belgium
| | - Anouk Scheres
- a Behavioural Science Institute , Radboud University , Nijmegen , The Netherlands
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Minder F, Zuberer A, Brandeis D, Drechsler R. A Review of the Clinical Utility of Systematic Behavioral Observations in Attention Deficit Hyperactivity Disorder (ADHD). Child Psychiatry Hum Dev 2018; 49:572-606. [PMID: 29214372 DOI: 10.1007/s10578-017-0776-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This review evaluates the clinical utility of tools for systematic behavioral observation in different settings for children and adolescents with ADHD. A comprehensive search yielded 135 relevant results since 1990. Observations from naturalistic settings were grouped into observations of classroom behavior (n = 58) and of social interactions (n = 25). Laboratory observations were subdivided into four contexts: independent play (n = 9), test session (n = 27), parent interaction (n = 11), and peer interaction (n = 5). Clinically relevant aspects of reliability and validity of employed instruments are reviewed. The results confirm the usefulness of systematic observations. However, no procedure can be recommended as a stand-alone diagnostic method. Psychometric properties are often unsatisfactory, which reduces the validity of observational methods, particularly for measuring treatment outcome. Further efforts are needed to improve the specificity of observational methods with regard to the discrimination of comorbidities and other disorders.
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Affiliation(s)
- Franziska Minder
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital of Psychiatry Zurich, University of Zurich, Zurich, Switzerland
| | - Agnieszka Zuberer
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital of Psychiatry Zurich, University of Zurich, Zurich, Switzerland
| | - Daniel Brandeis
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital of Psychiatry Zurich, University of Zurich, Zurich, Switzerland.,Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland.,Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University, Mannheim, Germany.,Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Renate Drechsler
- Department of Child and Adolescent Psychiatry and Psychotherapy, University Hospital of Psychiatry Zurich, University of Zurich, Zurich, Switzerland.
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Sali AW, Anderson BA, Yantis S, Mostofsky SH, Rosch KS. Reduced Value-Driven Attentional Capture Among Children with ADHD Compared to Typically Developing Controls. JOURNAL OF ABNORMAL CHILD PSYCHOLOGY 2018; 46:1187-1200. [PMID: 28913698 PMCID: PMC5854498 DOI: 10.1007/s10802-017-0345-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The current study examined whether children with ADHD were more distracted by a stimulus previously associated with reward, but currently goal-irrelevant, than their typically-developing peers. In addition, we also probed the associated cognitive and motivational mechanisms by examining correlations with other behavioral tasks. Participants included 8-12 year-old children with ADHD (n = 30) and typically developing controls (n = 26). Children were instructed to visually search for color-defined targets and received monetary rewards for accurate responses. In a subsequent search task in which color was explicitly irrelevant, we manipulated whether a distractor item appeared in a previously reward-associated color. We examined whether children responded more slowly on trials with the previously-rewarded distractor present compared to trials without this distractor, a phenomenon referred to as value-driven attentional capture (VDAC), and whether children with and without ADHD differed in the extent to which they displayed VDAC. Correlations among working memory performance, immediate reward preference (delay discounting) and attentional capture were also examined. Children with ADHD were significantly less affected by the presence of the previously rewarded distractor than were control participants. Within the ADHD group, greater value-driven attentional capture was associated with poorer working memory. Although both ADHD and control participants were initially distracted by previously reward-associated stimuli, the magnitude of distraction was larger and persisted longer among control participants.
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Affiliation(s)
- Anthony W Sali
- Center for Cognitive Neuroscience, Duke University, Durham, NC, USA.
| | - Brian A Anderson
- Department of Psychology, Texas A&M University, College Station, TX, USA
| | - Steven Yantis
- Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Stewart H Mostofsky
- Center for Neurodevelopmental and Imaging Research, Kennedy Krieger Institute, Baltimore, MD, USA
- Departments of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Keri S Rosch
- Center for Neurodevelopmental and Imaging Research, Kennedy Krieger Institute, Baltimore, MD, USA
- Departments of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Neuropsychology Department, Kennedy Krieger Institute, Baltimore, MD, USA
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Waiting and working for rewards: Attention-Deficit/Hyperactivity Disorder is associated with steeper delay discounting linked to amygdala activation, but not with steeper effort discounting. Cortex 2018; 106:164-173. [PMID: 30005368 DOI: 10.1016/j.cortex.2018.05.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/20/2018] [Accepted: 05/28/2018] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Children and adolescents with ADHD have a relatively strong preference for smaller immediate rewards over larger delayed rewards (steep delay discounting). It is unknown whether such steep discounting of rewards is specific for delayed rewards, i.e., supporting the delay aversion account of ADHD, or whether it is also present for effortful rewards, i.e., representing general reward insensitivity. Therefore, this study examined behavioral and BOLD responses during delay discounting (DD) and effort discounting (ED) in ADHD. METHOD Thirty adolescents with ADHD and 28 controls (12-17 years) were scanned while performing a DD-ED task (fMRI findings were based on 21 and 25 participants, respectively). During DD, participants were presented with a series of choices between a small reward delivered immediately and a larger reward delivered after 5-25s. During ED, participants were presented with choices between a small reward that was delivered after exerting 15% of their maximal hand grip strength and a larger reward delivered after exerting 30-90% of their strength. RESULTS Analyses on the subjective values of delayed and effortful rewards and on the Area Under the discounting Curves (AUCs) indicated that adolescents with ADHD showed steeper discounting than controls for DD, but not for ED. This was accompanied by a slightly stronger delay dose-response relationship in the amygdala for adolescents with ADHD who reported to be more delay averse in daily life. CONCLUSION Together, these results-steeper DD in the ADHD group and a stronger delay dose-response relationship in the amygdala, while no evidence for group differences in ED was found-support the delay aversion account of ADHD.
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Preliminary evidence of altered neural response during intertemporal choice of losses in adult attention-deficit hyperactivity disorder. Sci Rep 2018; 8:6703. [PMID: 29712945 PMCID: PMC5928218 DOI: 10.1038/s41598-018-24944-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 04/11/2018] [Indexed: 01/09/2023] Open
Abstract
Impulsive behaviours are common symptoms of attention-deficit hyperactivity disorder (ADHD). Although previous studies have suggested functional models of impulsive behaviour, a full explanation of impulsivity in ADHD remains elusive. To investigate the detailed mechanisms behind impulsive behaviour in ADHD, we applied an economic intertemporal choice task involving gains and losses to adults with ADHD and healthy controls and measured brain activity by functional magnetic resonance imaging. In the intertemporal choice of future gains, we observed no behavioural or neural difference between the two groups. In the intertemporal choice of future losses, adults with ADHD exhibited higher discount rates than the control participants. Furthermore, a comparison of brain activity representing the sensitivity of future loss in the two groups revealed significantly lower activity in the striatum and higher activity in the amygdala in adults with ADHD than in controls. Our preliminary findings suggest that an altered size sensitivity to future loss is involved in apparent impulsive choice behaviour in adults with ADHD and shed light on the multifaceted impulsivity underlying ADHD.
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125
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Barlow RL, Gorges M, Wearn A, Niessen HG, Kassubek J, Dalley JW, Pekcec A. Ventral Striatal D2/3 Receptor Availability Is Associated with Impulsive Choice Behavior As Well As Limbic Corticostriatal Connectivity. Int J Neuropsychopharmacol 2018; 21:705-715. [PMID: 29554302 PMCID: PMC6030945 DOI: 10.1093/ijnp/pyy030] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 03/14/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Low dopamine D2/3 receptor availability in the nucleus accumbens shell is associated with highly impulsive behavior in rats as measured by premature responses in a cued attentional task. However, it is unclear whether dopamine D2/3 receptor availability in the nucleus accumbens is equally linked to intolerance for delayed rewards, a related form of impulsivity. METHODS We investigated the relationship between D2/3 receptor availability in the nucleus accumbens and impulsivity in a delay-discounting task where animals must choose between immediate, small-magnitude rewards and delayed, larger-magnitude rewards. Corticostriatal D2/3 receptor availability was measured in rats stratified for high and low impulsivity using in vivo [18F]fallypride positron emission tomography and ex vivo [3H]raclopride autoradiography. Resting-state functional connectivity in limbic corticostriatal networks was also assessed using fMRI. RESULTS Delay-discounting task impulsivity was inversely related to D2/3 receptor availability in the nucleus accumbens core but not the dorsal striatum, with higher D2/3 binding in the nucleus accumbens shell of high-impulsive rats compared with low-impulsive rats. D2/3 receptor availability was associated with stronger connectivity between the cingulate cortex and hippocampus of high- vs low-impulsive rats. CONCLUSIONS We conclude that delay-discounting task impulsivity is associated with low D2/3 receptor binding in the nucleus accumbens core. Thus, two related forms of waiting impulsivity-premature responding and delay intolerance in a delay-of-reward task-implicate an involvement of D2/3 receptor availability in the nucleus accumbens shell and core, respectively. This dissociation may be causal or consequential to enhanced functional connectivity of limbic brain circuitry and hold relevance for attention-deficit/hyperactivity disorder, drug addiction, and other psychiatric disorders.
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Affiliation(s)
- Rebecca L Barlow
- Boehringer Ingelheim Pharma GmbH & Co. KG, CNS Discovery Research, Biberach an der Riss, Germany
| | - Martin Gorges
- Department of Neurology, University of Ulm, RKU, Ulm, Germany
| | - Alfie Wearn
- Boehringer Ingelheim Pharma GmbH & Co. KG, CNS Discovery Research, Biberach an der Riss, Germany
| | - Heiko G Niessen
- Boehringer Ingelheim Pharma GmbH & Co. KG, Translational Medicine & Clinical Pharmacology, Biberach an der Riss, Germany
| | - Jan Kassubek
- Department of Neurology, University of Ulm, RKU, Ulm, Germany
| | - Jeffrey W Dalley
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom,Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
| | - Anton Pekcec
- Boehringer Ingelheim Pharma GmbH & Co. KG, CNS Discovery Research, Biberach an der Riss, Germany,Correspondence: Anton Pekcec, DVM, PhD, Boehringer Ingelheim Pharma GmbH & Co. KG, CNS Discovery Research, Birkendorfer Strasse 65, 88397, Biberach an der Riss, Germany ()
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Barch DM, Belden AC, Tillman R, Whalen D, Luby JL. Early Childhood Adverse Experiences, Inferior Frontal Gyrus Connectivity, and the Trajectory of Externalizing Psychopathology. J Am Acad Child Adolesc Psychiatry 2018; 57:183-190. [PMID: 29496127 PMCID: PMC5836492 DOI: 10.1016/j.jaac.2017.12.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 12/04/2017] [Accepted: 12/22/2017] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Early adverse childhood experiences (ACEs) have been linked to the development of both internalizing and externalizing psychopathology. In our prior work, we found that ACEs predicted reductions in the volume of the inferior frontal gyrus (IFG), a brain region important for impulse control and emotion regulation. Here we tested the hypothesis that ACEs might influence child behavioral outcomes through an impact on IFG functional connectivity, which may influence impulsive or risk-taking behavior. METHOD We examined the effects of prospectively assessed ACEs on IFG connectivity in childhood, and their relationship to the trajectory of subsequent psychopathology from late school age and early adolescence, using data from an 11-year longitudinal study of children starting in preschool that included 3 waves of resting state functional connectivity across childhood and early adolescence. RESULTS ACEs predicted functional connectivity of both left and right IFG. Multi-level modeling of symptoms across 3 waves of assessments indicated that more ACEs predicted both internalizing and externalizing symptoms. However, altered IFG connectivity specifically predicted greater externalizing symptoms over time in middle childhood and early adolescence, as compared to internalizing symptoms. Longitudinal modeling indicating that the relationships between externalizing and functional connectivity were maintained across 3 waves of functional connectivity assessment. CONCLUSION These findings underscore the relationship of ACEs to later psychopathology, and suggest that connectivity of the IFG, a region known to play an important role in impulse control and emotion regulation, may play a key role in the risk trajectory of ACEs to externalizing problems. However, further work is needed to understand whether these relationships reflect a direct effect of ACEs or whether ACEs are a marker for other environmental or genetic factors that may also influence brain development and behavior.
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Nishitomi K, Yano K, Kobayashi M, Jino K, Kano T, Horiguchi N, Shinohara S, Hasegawa M. Systemic administration of guanfacine improves food-motivated impulsive choice behavior primarily via direct stimulation of postsynaptic α 2A-adrenergic receptors in rats. Behav Brain Res 2018; 345:21-29. [PMID: 29476896 DOI: 10.1016/j.bbr.2018.02.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 02/15/2018] [Accepted: 02/19/2018] [Indexed: 12/21/2022]
Abstract
Impulsive choice behavior, which can be assessed using the delay discounting task, is a characteristic of various psychiatric disorders, including attention-deficit/hyperactivity disorder (ADHD). Guanfacine is a selective α2A-adrenergic receptor agonist that is clinically effective in treating ADHD. However, there is no clear evidence that systemic guanfacine administration reduces impulsive choice behavior in the delay discounting task in rats. In the present study, we examined the effect of systemic guanfacine administration on food-motivated impulsive choice behavior in rats and the neuronal mechanism underlying this effect. Repeated administration of either guanfacine, methylphenidate, or atomoxetine significantly enhanced impulse control, increasing the number of times the rats chose a large but delayed reward in a dose-dependent manner. The effect of guanfacine was significantly blocked by pretreatment with an α2A-adrenergic receptor antagonist. Furthermore, the effect of guanfacine remained unaffected in rats pretreated with a selective noradrenergic neurotoxin, consistent with a post-synaptic action. In contrast, the effect of atomoxetine on impulsive choice behavior was attenuated by pretreatment with the noradrenergic neurotoxin. These results provide the first evidence that systemically administered guanfacine reduces impulsive choice behavior in rats and that direct stimulation of postsynaptic, rather than presynaptic, α2A-adrenergic receptors is involved in this effect.
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Affiliation(s)
- Kouhei Nishitomi
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi Co. Ltd., Toyonaka, Osaka, Japan.
| | - Koji Yano
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi Co. Ltd., Toyonaka, Osaka, Japan
| | - Mika Kobayashi
- Drug Efficacy Evaluation Services 3, Drug Efficacy Evaluation and Research Technology Service, Shionogi Techno Advance Research Co. Ltd., Toyonaka, Osaka, Japan
| | - Kohei Jino
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi Co. Ltd., Toyonaka, Osaka, Japan
| | - Takuya Kano
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi Co. Ltd., Toyonaka, Osaka, Japan
| | - Naotaka Horiguchi
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi Co. Ltd., Toyonaka, Osaka, Japan
| | - Shunji Shinohara
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi Co. Ltd., Toyonaka, Osaka, Japan
| | - Minoru Hasegawa
- Pain & Neuroscience, Drug Discovery & Disease Research Laboratory, Shionogi Co. Ltd., Toyonaka, Osaka, Japan
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Lundwall RA, Sgro JF, Fanger J. Response time scores on a reflexive attention task predict a child's inattention score from a parent report. PLoS One 2018; 13:e0190724. [PMID: 29329307 PMCID: PMC5766099 DOI: 10.1371/journal.pone.0190724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 11/30/2017] [Indexed: 11/25/2022] Open
Abstract
Compared to sustained attention, only a small proportion of studies examine reflexive attention as a component of everyday attention. Understanding the significance of reflexive attention to everyday attention may inform better treatments for attentional disorders. Children from a general population (recruited when they were from 9-16 years old) completed an exogenously-cued task measuring the extent to which attention is captured by peripheral cue-target conditions. Parents completed a questionnaire reporting their child's day-to-day attention. A general linear model indicated that parent-rated inattention predicted the increase in response time over baseline when a bright cue preceded the target (whether it was valid or invalid) but not when a dim cue preceded the target. More attentive children had more pronounced response time increases from baseline. Our findings suggest a link between a basic measure of cognition (response time difference scores) and parent observations. The findings have implications for increased understanding of the role of reflexive attention in the everyday attention of children.
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Affiliation(s)
- Rebecca A. Lundwall
- Psychology Department, Brigham Young University, Provo, Utah, United States of America
| | - Jordan F. Sgro
- Psychology Department, Brigham Young University, Provo, Utah, United States of America
| | - Julia Fanger
- Sociology Department, Brigham Young University, Provo, Utah, United States of America
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Sanchez-Roige S, Fontanillas P, Elson SL, Pandit A, Schmidt EM, Foerster JR, Abecasis GR, Gray JC, de Wit H, Davis LK, MacKillop J, Palmer AA. Genome-wide association study of delay discounting in 23,217 adult research participants of European ancestry. Nat Neurosci 2018; 21:16-18. [PMID: 29230059 PMCID: PMC6984001 DOI: 10.1038/s41593-017-0032-x] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 10/30/2017] [Indexed: 01/19/2023]
Abstract
Delay discounting (DD), the tendency to discount the value of delayed versus current rewards, is elevated in a constellation of diseases and behavioral conditions. We performed a genome-wide association study of DD using 23,127 research participants of European ancestry. The most significantly associated single-nucleotide polymorphism was rs6528024 (P = 2.40 × 10-8), which is located in an intron of the gene GPM6B. We also showed that 12% of the variance in DD was accounted for by genotype and that the genetic signature of DD overlapped with attention-deficit/hyperactivity disorder, schizophrenia, major depression, smoking, personality, cognition and body weight.
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Affiliation(s)
| | | | | | - Anita Pandit
- Department of Biostatistics and Center for Statistical Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Ellen M Schmidt
- Department of Biostatistics and Center for Statistical Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Johanna R Foerster
- K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health and Nursing, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - Gonçalo R Abecasis
- Department of Biostatistics and Center for Statistical Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Joshua C Gray
- Center for Deployment Psychology, Uniformed Services University, Bethesda, MD, USA
| | - Harriet de Wit
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL, USA
| | - Lea K Davis
- Vanderbilt Genetics Institute, Division of Genetic Medicine, Department of Medicine, Vanderbilt University, Nashville, TN, USA
| | - James MacKillop
- Peter Boris Centre for Addictions Research, McMaster University/St. Joseph's Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Abraham A Palmer
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA.
- Institute for Genomic Medicine, University of California San Diego, La Jolla, CA, USA.
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130
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Egbert AH, Wilfley DE, Eddy KT, Boutelle KN, Zucker N, Peterson CB, Celio Doyle A, Le Grange D, Goldschmidt AB. Attention-Deficit/Hyperactivity Disorder Symptoms Are Associated with Overeating with and without Loss of Control in Youth with Overweight/Obesity. Child Obes 2018; 14:50-57. [PMID: 28945463 PMCID: PMC5743031 DOI: 10.1089/chi.2017.0114] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND There is growing evidence that attention-deficit/hyperactivity disorder (ADHD) and loss of control (LOC) eating, both prevalent in children and adolescents, may be related to one another. However, the relationship between ADHD and overeating without LOC has been largely unexamined, thus precluding an understanding of the independent contributions of LOC and episode size in these associations. The current study sought to examine associations between ADHD symptoms and maladaptive eating by evaluating three different types of eating episodes characterized by the presence/absence of LOC and the amount of food consumed: objectively large LOC episodes [objective binge eating (OBE)], subjectively large binge episodes [subjective binge eating (SBE)], and objectively large overeating episodes without LOC [objective overeating (OO)]. METHODS Participants were 385 youth (M age = 10.89, SD = 2.25) drawn from five different research protocols at institutions across the United States. Participants and their parents completed questionnaires and semistructured interviews to assess ADHD symptoms, OBE, SBE, and OO. RESULTS As hypothesized, negative binomial regressions revealed that ADHD symptoms were significantly associated with OBE, χ2(1) = 16.61, p < 0.001, and with OO, χ2(1) = 10.64, p < 0.01. Contrary to expectations, they were not associated with SBE. CONCLUSIONS These results indicate the need for future studies to explore possible shared mechanisms (e.g., impulsivity) underlying associations between ADHD symptoms, OBE, and OO. Clinical implications include support for considering ADHD symptoms in programs that target both prevention of LOC eating and obesity more generally.
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Affiliation(s)
- Amy Heard Egbert
- Department of Psychology, Loyola University Chicago, Chicago, IL
| | - Denise E. Wilfley
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO
| | - Kamryn T. Eddy
- Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Kerri N. Boutelle
- Department of Pediatrics and Psychiatry, University of California San Diego, La Jolla, CA
| | - Nancy Zucker
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC
| | - Carol B. Peterson
- Department of Psychiatry, University of Minnesota Medical Center, Minneapolis, MN
| | - Angela Celio Doyle
- Eating Disorders Center, Evidence Based Treatment Centers of Seattle, Seattle, WA
| | - Daniel Le Grange
- Department of Psychiatry, University of California San Francisco, San Francisco, CA.,Department of Psychiatry and Behavioral Neuroscience, The University of Chicago, Chicago, IL
| | - Andrea B. Goldschmidt
- Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Weight Control and Diabetes Research Center/The Miriam Hospital, Providence, RI
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131
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Norman LJ, Carlisi CO, Christakou A, Chantiluke K, Murphy C, Simmons A, Giampietro V, Brammer M, Mataix-Cols D, Rubia K. Neural dysfunction during temporal discounting in paediatric Attention-Deficit/Hyperactivity Disorder and Obsessive-Compulsive Disorder. Psychiatry Res 2017; 269:97-105. [PMID: 28988149 PMCID: PMC5647646 DOI: 10.1016/j.pscychresns.2017.09.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 09/06/2017] [Accepted: 09/09/2017] [Indexed: 01/23/2023]
Abstract
Both Attention-Deficit/Hyperactivity Disorder (ADHD) and Obsessive-Compulsive Disorder (OCD) are associated with choice impulsivity, i.e. the tendency to prefer smaller immediate rewards over larger delayed rewards. However, the extent to which this impulsivity is mediated by shared or distinct underlying neural mechanisms is unclear. Twenty-six boys with ADHD, 20 boys with OCD and 20 matched controls (aged 12-18) completed an fMRI version of an individually adjusted temporal discounting (TD) task which requires choosing between a variable amount of money now or £100 in one week, one month or one year. Activations to immediate and delayed reward choices were compared between groups using a three-way ANCOVA. ADHD patients had steeper discounting rates on the task relative to controls. OCD patients did not differ from controls or patients with ADHD. Patients with ADHD and OCD showed predominantly shared activation deficits during TD in fronto-striato-insular-cerebellar regions responsible for self-control and temporal foresight, suggesting that choice impulsivity is mediated by overlapping neural dysfunctions in both disorders. OCD patients alone showed dysfunction relative to controls in right orbitofrontal and rostrolateral prefrontal cortex, extending previous findings of abnormalities in these regions in OCD to the domain of choice impulsiveness.
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Affiliation(s)
- Luke J Norman
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK; Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, USA.
| | - Christina O Carlisi
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK
| | - Anastasia Christakou
- Centre for Integrative Neuroscience and Neurodynamics, School of Psychology and Clinical Language Sciences, University of Reading, UK
| | - Kaylita Chantiluke
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK
| | - Clodagh Murphy
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK; Sackler Institute for Translational Neurodevelopment and Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology and Neuroscience, King׳s College London, London, UK
| | - Andrew Simmons
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK; National Institute for Health Research (NIHR) Biomedical Research Centre (BRC) for Mental Health at South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Psychology & Neuroscience, King's College London, UK; Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Clinical Geriatrics, Karolinska Institutet, Stockholm, Sweden
| | - Vincent Giampietro
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK
| | - Michael Brammer
- Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK
| | - David Mataix-Cols
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Katya Rubia
- Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, UK
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132
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Lin G, Roth RM. The Status of Structural and Functional MRI in Adolescents with Attention-Deficit/Hyperactivity Disorder. PSYCHOLOGICAL INJURY & LAW 2017. [DOI: 10.1007/s12207-017-9296-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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133
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Patros CHG, L Sweeney K, Mahone EM, Mostofsky SH, Rosch KS. Greater delay discounting among girls, but not boys, with ADHD correlates with cognitive control. Child Neuropsychol 2017; 24:1026-1046. [PMID: 28768457 DOI: 10.1080/09297049.2017.1359525] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Cognitive neuroscience models suggest both reward valuation and cognitive control contribute to reward-based decision-making. The current study examined the relationship between cognitive control and delay discounting (i.e., choosing smaller, immediate over larger, delayed rewards) in a large sample of boys and girls diagnosed with attention-deficit/hyperactivity disorder (ADHD; N = 95) and typically developing control children (TD; N = 59). Specifically, we examined performance on multiple measures of cognitive control (i.e., Go/No-Go task, Stop Signal task, and Spatial Span task) and delay discounting (i.e., Classic Delay Discounting and Real-Time Delay Discounting tasks), as well as the relationship between these measures. Results indicated that sex moderated the effects of group on task performance. Specifically, girls with ADHD, but not boys with the disorder, exhibited atypical delay discounting of real-time rewards. Results from correlational analyses indicated that delay discounting and cognitive control were not significantly correlated in the overall sample. Multiple regression analyses demonstrated that among girls with ADHD poorer spatial working memory and inhibitory control predicted greater real-time discounting. Collectively, findings provide support for distinct patterns of cognitive control and delay discounting among school-aged girls and boys with ADHD. Additionally, findings suggest that among girls with ADHD, those who exhibit relatively poor working memory and inhibitory control might be a particularly vulnerable subgroup with the greatest propensity to exhibit maladaptive decision-making.
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Affiliation(s)
- Connor H G Patros
- a Department of Psychology , Oklahoma State University, Stillwater, OK, USA
| | - Kristie L Sweeney
- b Center for Neurodevelopmental and Imaging Research , Kennedy Krieger Institute , Baltimore , MD , USA.,c Department of Neuropsychology , Kennedy Krieger Institute , Baltimore , MD , USA
| | - E Mark Mahone
- b Center for Neurodevelopmental and Imaging Research , Kennedy Krieger Institute , Baltimore , MD , USA.,c Department of Neuropsychology , Kennedy Krieger Institute , Baltimore , MD , USA.,d Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Stewart H Mostofsky
- b Center for Neurodevelopmental and Imaging Research , Kennedy Krieger Institute , Baltimore , MD , USA.,d Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD , USA.,e Department of Neurology , Johns Hopkins University School of Medicine , Baltimore , MD , USA
| | - Keri S Rosch
- b Center for Neurodevelopmental and Imaging Research , Kennedy Krieger Institute , Baltimore , MD , USA.,c Department of Neuropsychology , Kennedy Krieger Institute , Baltimore , MD , USA.,d Department of Psychiatry and Behavioral Sciences , Johns Hopkins University School of Medicine , Baltimore , MD , USA
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134
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Caleza-Jimenez C, Yañez-Vico R, Mendoza-Mendoza A, Palma JC, Iglesias-Linares A. Impact of delayed gratification on oral health and caries status in the primary dentition. J Dent 2017; 63:103-108. [DOI: 10.1016/j.jdent.2017.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/28/2017] [Accepted: 06/06/2017] [Indexed: 12/26/2022] Open
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135
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Bteich G, Berbiche D, Khazaal Y. Validation of the short Arabic UPPS-P Impulsive Behavior Scale. BMC Psychiatry 2017; 17:244. [PMID: 28683772 PMCID: PMC5499064 DOI: 10.1186/s12888-017-1407-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 06/27/2017] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Impulsivity is involved in numerous psychiatric and addictive disorders, as well as in risky behaviors. The UPPS-P scale highlights five complementary impulsivity constructs (i.e., positive urgency, negative urgency, lack of perseverance, lack of premeditation, and sensation seeking) that possibly work as different pathways linking impulsivity to other disorders. In this study, we aimed to evaluate the psychometric properties of the Arab language short 20-item UPPS-P scale and to eventually validate it. METHODS Participants were recruited online through e-mail invitations. After online informed consent was obtained, the questionnaires (the UPPS-P and the Compulsive Internet Use Scale [CIUS]) were completed anonymously. The five dimensions of the Arab UPPS-P model were assessed in a sample of 743 participants. RESULTS As in other linguistic assessments of the UPPS-P, confirmatory factor analysis showed the validity of a model with five different, but nonetheless interrelated, facets of impulsivity. A three-factor model with two higher order factors-urgency (negative and positive) and lack of conscientiousness (lack of premeditation and lack of perseverance)-and a third sensation seeking factor fit the data well, but to a lesser extent. The results suggested good internal consistency, with external validity shown from correlations between some of the UPPS-P components and a measure of addictive Internet use (the CIUS). CONCLUSION The Arab short UPPS-P is a valid assessment tool with good psychometric properties and is suitable for online use.
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Affiliation(s)
- Ghada Bteich
- Lebanese University Faculty of Public Health, Lebanon University, Tripoli, Lebanon
| | - Djamal Berbiche
- 0000 0000 9064 6198grid.86715.3dCharles-LeMoyne Hospital Research Centre, Sherbrooke University, Sherbrooke, Canada
| | - Yasser Khazaal
- Geneva University Hospitals, Grand-Pré 70C, 1206, Geneva, Switzerland. .,University of Geneva, Geneva, Switzerland. .,University Institute of Mental Health at Montreal, Montreal, Canada.
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136
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Beauchaine TP, Ben-David I, Sela A. Attention-deficit/hyperactivity disorder, delay discounting, and risky financial behaviors: A preliminary analysis of self-report data. PLoS One 2017; 12:e0176933. [PMID: 28481903 PMCID: PMC5421775 DOI: 10.1371/journal.pone.0176933] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 04/19/2017] [Indexed: 11/18/2022] Open
Abstract
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. This study extends prior research by examining associations between ADHD symptoms, delay discounting, and an array of previously unevaluated financial outcomes among 544 individuals (mean age 35 years). Controlling for age, income, sex, education, and substance use, ADHD symptoms were associated with delay discounting, late credit card payments, credit card balances, use of pawn services, personal debt, and employment histories (less time spent at more jobs). Consistent with neural models of reward processing and associative learning, more of these relations were attributable to hyperactive-impulsive symptoms than inattentive symptoms. Implications for financial decision-making and directions for future research are discussed.
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Affiliation(s)
- Theodore P. Beauchaine
- Department of Psychology, The Ohio State University, Columbus, Ohio, United States of America
| | - Itzhak Ben-David
- Department of Finance, The Ohio State University, Columbus, Ohio, United States of America
| | - Aner Sela
- Warrington College of Business, Department of Marketing, University of Florida, Gainesville, Florida, United States of America
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137
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de Water E, Mies GW, Figner B, Yoncheva Y, van den Bos W, Castellanos FX, Cillessen AHN, Scheres A. Neural mechanisms of individual differences in temporal discounting of monetary and primary rewards in adolescents. Neuroimage 2017; 153:198-210. [PMID: 28411154 DOI: 10.1016/j.neuroimage.2017.04.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 04/04/2017] [Accepted: 04/05/2017] [Indexed: 01/15/2023] Open
Abstract
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. Using mixed-effects modeling, we determined participants' average impatience, and further decomposed TD choices into: 1) amount sensitivity (unique contribution of the magnitude of the immediate reward); and 2) delay sensitivity (unique contribution of delay duration). Adolescents' average impatience was positively correlated with frontoparietal and ventral striatal activity during delayed reward choices, and with ventromedial prefrontal cortex activity during immediate reward choices. Adolescents' amount sensitivity was positively associated with ventral striatal and dorsal anterior cingulate cortex activity during immediate reward choices. Delay sensitivity was positively correlated with inferior parietal cortex activity during delayed reward choices. As expected, snacks were discounted more steeply than money, and TD of both reward types was associated with overlapping activation in the inferior parietal cortex. Exploring whether testosterone or estradiol were associated with TD and its neural correlates revealed no significant associations. These findings indicate that distinct components contribute uniquely to TD choice and that individual differences in amount sensitivity are uniquely associated with activation of reward valuation areas, while individual differences in delay sensitivity are uniquely associated with activation of cognitive control areas.
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Affiliation(s)
- Erik de Water
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands.
| | - Gabry W Mies
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands
| | - Bernd Figner
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands
| | - Yuliya Yoncheva
- Department of Child and Adolescent Psychiatry, Center for Neurodevelopmental Disorders, NYU Langone Medical Center, New York, NY, USA
| | - Wouter van den Bos
- Center for Adaptive Rationality, Max Planck Institute for Human Development, Berlin, Germany
| | - F Xavier Castellanos
- Department of Child and Adolescent Psychiatry, Center for Neurodevelopmental Disorders, NYU Langone Medical Center, New York, NY, USA; Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | | | - Anouk Scheres
- Behavioural Science Institute, Radboud University, Nijmegen, The Netherlands
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138
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Nigg JT. Annual Research Review: On the relations among self-regulation, self-control, executive functioning, effortful control, cognitive control, impulsivity, risk-taking, and inhibition for developmental psychopathology. J Child Psychol Psychiatry 2017; 58:361-383. [PMID: 28035675 PMCID: PMC5367959 DOI: 10.1111/jcpp.12675] [Citation(s) in RCA: 705] [Impact Index Per Article: 100.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/14/2016] [Indexed: 01/08/2023]
Abstract
BACKGROUND Self-regulation (SR) is central to developmental psychopathology, but progress has been impeded by varying terminology and meanings across fields and literatures. METHODS The present review attempts to move that discussion forward by noting key sources of prior confusion such as measurement-concept confounding, and then arguing the following major points. RESULTS First, the field needs a domain-general construct of SR that encompasses SR of action, emotion, and cognition and involves both top-down and bottom-up regulatory processes. This does not assume a shared core process across emotion, action, and cognition, but is intended to provide clarity on the extent of various claims about kinds of SR. Second, top-down aspects of SR need to be integrated. These include (a) basic processes that develop early and address immediate conflict signals, such as cognitive control and effortful control (EC), and (b) complex cognition and strategies for addressing future conflict, represented by the regulatory application of complex aspects of executive functioning. Executive function (EF) and cognitive control are not identical to SR because they can be used for other activities, but account for top-down aspects of SR at the cognitive level. Third, impulsivity, risk-taking, and disinhibition are distinct although overlapping; a taxonomy of the kinds of breakdowns of SR associated with psychopathology requires their differentiation. Fourth, different aspects of the SR universe can be organized hierarchically in relation to granularity, development, and time. Low-level components assemble into high-level components. This hierarchical perspective is consistent across literatures. CONCLUSIONS It is hoped that the framework outlined here will facilitate integration and cross-talk among investigators working from different perspectives, and facilitate individual differences research on how SR relates to developmental psychopathology.
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Affiliation(s)
- Joel T Nigg
- Department of Psychiatry, Oregon Health and Science University, Portland, OR, USA
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139
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Investigating the Impact of Cognitive Load and Motivation on Response Control in Relation to Delay Discounting in Children with ADHD. JOURNAL OF ABNORMAL CHILD PSYCHOLOGY 2016; 45:1339-1353. [PMID: 27943064 DOI: 10.1007/s10802-016-0237-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is characterized by deficits in impulse control across a range of behaviors, from simple actions to those involving complex decision-making (e.g., preference for smaller-sooner versus larger later rewards). This study investigated whether changes in motor response control with increased cognitive load and motivational contingencies are associated with decision-making in the form of delay discounting among 8-12 year old children with and without ADHD. Children with ADHD (n = 26; 8 girls) and typically developing controls (n = 40; 11 girls) completed a standard go/no-go (GNG) task, a GNG task with motivational contingencies, a GNG task with increased cognitive load, and two measures of delay discounting: a real-time task in which the delays and immediately consumable rewards are experienced in real-time, and a classic task involving choices about money at longer delays. Children with ADHD, particularly girls, exhibited greater delay discounting than controls during the real-time discounting task, whereas diagnostic groups did not significantly differ on the classic discounting task. The effect of cognitive load on response control was uniquely associated with greater discounting on the real-time task for children with ADHD, but not for control children. The effect of motivational contingencies on response control was not significantly associated with delay discounting for either diagnostic group. The findings from this study help to inform our understanding of the factors that influence deficient self-control in ADHD, suggesting that impairments in cognitive control may contribute to greater delay discounting in ADHD.
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140
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de Water E, Burk WJ, Cillessen AHN, Scheres A. Substance use and decision-making in adolescent best friendship dyads: The role of popularity. SOCIAL DEVELOPMENT 2016. [DOI: 10.1111/sode.12227] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Erik de Water
- Behavioural Science Institute, Radboud University; Nijmegen The Netherlands
| | - William J. Burk
- Behavioural Science Institute, Radboud University; Nijmegen The Netherlands
| | | | - Anouk Scheres
- Behavioural Science Institute, Radboud University; Nijmegen The Netherlands
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141
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Patros CHG, Alderson RM, Hudec KL, Tarle SJ, Lea SE. Hyperactivity in boys with attention-deficit/hyperactivity disorder: The influence of underlying visuospatial working memory and self-control processes. J Exp Child Psychol 2016; 154:1-12. [PMID: 27776326 DOI: 10.1016/j.jecp.2016.09.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 09/26/2016] [Accepted: 09/27/2016] [Indexed: 10/20/2022]
Abstract
Changes in motor activity were examined across control and executive function (EF) tasks that differ with regard to demands placed on visuospatial working memory (VS-WM) and self-control processes. Motor activity was measured via actigraphy in 8- to 12-year-old boys with (n=15) and without (n=17) attention-deficit/hyperactivity disorder (ADHD) during the completion of VS-WM, self-control, and control tasks. Results indicated that boys with ADHD, relative to typically developing boys, exhibited greater motor activity across tasks, and both groups' activity was greater during EF tasks relative to control tasks. Lastly, VS-WM performance, relative to self-control performance, accounted for significantly more variance in activity across both VS-WM and self-control tasks. Collectively, findings suggest that ADHD-related hyperactivity is positively related to increased cognitive demands and appears to be better explained by deficient VS-WM rather than insufficient self-control.
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Affiliation(s)
- Connor H G Patros
- Department of Psychology, Oklahoma State University, Stillwater, OK 74078, USA
| | - R Matt Alderson
- Department of Psychology, Oklahoma State University, Stillwater, OK 74078, USA.
| | - Kristen L Hudec
- Department of Psychology, Oklahoma State University, Stillwater, OK 74078, USA
| | - Stephanie J Tarle
- Department of Psychology, Oklahoma State University, Stillwater, OK 74078, USA
| | - Sarah E Lea
- Department of Psychology, Oklahoma State University, Stillwater, OK 74078, USA
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Strickland JC, Feinstein MA, Lacy RT, Smith MA. The effects of physical activity on impulsive choice: Influence of sensitivity to reinforcement amount and delay. Behav Processes 2016; 126:36-45. [PMID: 26964905 DOI: 10.1016/j.beproc.2016.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 03/03/2016] [Accepted: 03/05/2016] [Indexed: 11/30/2022]
Abstract
Impulsive choice is a diagnostic feature and/or complicating factor for several psychological disorders and may be examined in the laboratory using delay-discounting procedures. Recent investigators have proposed using quantitative measures of analysis to examine the behavioral processes contributing to impulsive choice. The purpose of this study was to examine the effects of physical activity (i.e., wheel running) on impulsive choice in a single-response, discrete-trial procedure using two quantitative methods of analysis. To this end, rats were assigned to physical activity or sedentary groups and trained to respond in a delay-discounting procedure. In this procedure, one lever always produced one food pellet immediately, whereas a second lever produced three food pellets after a 0, 10, 20, 40, or 80-s delay. Estimates of sensitivity to reinforcement amount and sensitivity to reinforcement delay were determined using (1) a simple linear analysis and (2) an analysis of logarithmically transformed response ratios. Both analyses revealed that physical activity decreased sensitivity to reinforcement amount and sensitivity to reinforcement delay. These findings indicate that (1) physical activity has significant but functionally opposing effects on the behavioral processes that contribute to impulsive choice and (2) both quantitative methods of analysis are appropriate for use in single-response, discrete-trial procedures.
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Affiliation(s)
- Justin C Strickland
- Department of Psychology, Box 7037, Davidson College, Davidson, NC 28035-7037, United States, United States
| | - Max A Feinstein
- Department of Psychology, Box 7037, Davidson College, Davidson, NC 28035-7037, United States, United States
| | - Ryan T Lacy
- Department of Psychology, Box 7037, Davidson College, Davidson, NC 28035-7037, United States, United States
| | - Mark A Smith
- Department of Psychology, Box 7037, Davidson College, Davidson, NC 28035-7037, United States, United States.
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143
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Rohde LA. Commentary: Transdiagnostic neuroscience of child and adolescent mental disorders--differentiating decision-making in attention-deficit/hyperactivity disorder, conduct disorder, depression and anxiety. A commentary on Sonuga-Barke et al. (2016). J Child Psychol Psychiatry 2016; 57:350-2. [PMID: 26889895 DOI: 10.1111/jcpp.12531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/18/2016] [Indexed: 12/13/2022]
Abstract
Sonuga-Barke, Cortese, Fairchild, and Stringaris offer us new insights not only on the neuropsychological processes and neurobiological mechanisms involved in the decision-making process but also how some of the most relevant child mental disorders might impact this process through a very comprehensive review of the pertinent literature. Although it is difficult to select specific points for discussing in a so dense review, I would like to highlight some aspects for 'whetting readers appetite' and seduce them to be in contact with the fascinating neurobiology behind an essential aspect of our lives.
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Affiliation(s)
- Luis Augusto Rohde
- Hospital de Clínicas de Porto Alegre, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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144
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Patros CHG, Alderson RM, Lea SE, Tarle SJ. Context influences decision-making in boys with attention-deficit/hyperactivity disorder: A comparison of traditional and novel choice-impulsivity paradigms. Child Neuropsychol 2015; 23:242-254. [PMID: 26695841 DOI: 10.1080/09297049.2015.1119261] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is characterized by an impaired ability to maintain attention and/or hyperactivity/impulsivity. Impulsivity is frequently defined as the preference for small, immediate rewards over larger, delayed rewards, and has been associated with a variety of negative outcomes such as risky behavior and academic difficulty. Extant studies have uniformly utilized the traditional paradigm of presenting two response choices, which limits the generalization of findings to scenarios in which children/adolescents are faced with dichotomous decisions. The current study is the first to examine the effect of manipulating the number of available response options on impulsive decision-making in boys with and without ADHD. A total of 39 boys (ADHD = 16, typically developing [TD] = 23) aged 8-12 years completed a traditional two-choice impulsivity task and a novel five-choice impulsivity task to examine the effect of manipulating the number of choice responses (two vs five) on impulsive decision-making. A five-choice task was utilized as it presents a more continuous array of choice options when compared to the typical two-choice task, and is comparable given its methodological similarity to the two-choice task. Results suggested that boys with ADHD were significantly more impulsive than TD boys during the two-choice task, but not during the five-choice task. Collectively, these findings suggest that ADHD-related impulsivity is not ubiquitous, but rather dependent on variation in demands and/or context. Further, these findings highlight the importance of examining ADHD-related decision-making within the context of alternative paradigms, as the exclusive utilization of two-choice tasks may promote inaccurate conceptualizations of the disorder.
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Affiliation(s)
- Connor H G Patros
- a Department of Psychology , Oklahoma State University , Stillwater , OK , USA
| | - R Matt Alderson
- a Department of Psychology , Oklahoma State University , Stillwater , OK , USA
| | - Sarah E Lea
- a Department of Psychology , Oklahoma State University , Stillwater , OK , USA
| | - Stephanie J Tarle
- a Department of Psychology , Oklahoma State University , Stillwater , OK , USA
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