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https://www.readbyqxmd.com/read/28868337/the-adolescent-brain-at-risk-for-substance-use-disorders-a-review-of-functional-mri-research-on-motor-response-inhibition
#1
Maki S Koyama, Muhammad A Parvaz, Rita Z Goldstein
Youth with family history (FH+) of substance use disorders (SUDs) are at increased risk for developing SUDs. Similarly, childhood attention deficit hyperactivity disorder (ADHD) is considered to be a risk factor for developing SUDs. Recent research has suggested a close association between SUDs and impaired inhibitory control. As such, it is crucial to examine common and distinct neural alterations associated with inhibitory control in these at-risk groups, particularly prior to the initiation of heavy substance use...
February 2017: Current Opinion in Behavioral Sciences
https://www.readbyqxmd.com/read/28863310/altered-patterns-of-resting-state-functional-connectivity-between-the-caudate-and-other-brain-regions-in-medication-na%C3%A3-ve-children-with-attention-deficit-hyperactivity-disorder
#2
Zhilong Yang, Hongxing Li, Wenjuan Tu, Suhong Wang, Yanling Ren, Yang Yi, Ting Wu, Kaihua Jiang, Huijuan Shen, Jian Wu, Xuan Dong
BACKGROUND: Structural and functional alterations occur in the caudate of patients with attention-deficit/hyperactivity disorder (ADHD). Here we aimed to investigate the functional connectivity between the dorsal caudate and other brain regions in ADHD children. METHODS: Resting-state functional connectivity from 30 ADHD and 33 age- and gender-matched "normal" children were measured by functional Magnetic Resonance Imaging. RESULTS: Positive connectivity with dorsal caudate was observed in the prefrontal areas, cingulate cortex and temporal lobe...
July 28, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28863139/gut-microbiome-in-adhd-and-its-relation-to-neural-reward-anticipation
#3
Esther Aarts, Thomas H A Ederveen, Jilly Naaijen, Marcel P Zwiers, Jos Boekhorst, Harro M Timmerman, Sanne P Smeekens, Mihai G Netea, Jan K Buitelaar, Barbara Franke, Sacha A F T van Hijum, Alejandro Arias Vasquez
BACKGROUND: Microorganisms in the human intestine (i.e. the gut microbiome) have an increasingly recognized impact on human health, including brain functioning. Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder associated with abnormalities in dopamine neurotransmission and deficits in reward processing and its underlying neuro-circuitry including the ventral striatum. The microbiome might contribute to ADHD etiology via the gut-brain axis. In this pilot study, we investigated potential differences in the microbiome between ADHD cases and undiagnosed controls, as well as its relation to neural reward processing...
2017: PloS One
https://www.readbyqxmd.com/read/28861338/increased-default-mode-variability-is-related-to-reduced-task-performance-and-is-evident-in-adults-with-adhd
#4
Athanasia M Mowinckel, Dag Alnæs, Mads L Pedersen, Sigurd Ziegler, Mats Fredriksen, Tobias Kaufmann, Edmund Sonuga-Barke, Tor Endestad, Lars T Westlye, Guido Biele
Insufficient suppression and connectivity of the default mode network (DMN) is a potential mediator of cognitive dysfunctions across various disorders, including attention deficit/hyperactivity disorder (ADHD). However, it remains unclear if alterations in sustained DMN suppression, variability and connectivity during prolonged cognitive engagement are implicated in adult ADHD pathophysiology, and to which degree methylphenidate (MPH) remediates any DMN abnormalities. This randomized, double-blinded, placebo-controlled, cross-over clinical trial of MPH (clinicaltrials...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28843999/predicting-clinical-symptoms-of-attention-deficit-hyperactivity-disorder-based-on-temporal-patterns-between-and-within-intrinsic-connectivity-networks
#5
Xun-Heng Wang, Yun Jiao, Lihua Li
Attention deficit hyperactivity disorder (ADHD) is a common brain disorder with high prevalence in school-age children. Previously developed machine learning-based methods have discriminated patients with ADHD from normal controls by providing label information of the disease for individuals. Inattention and impulsivity are the two most significant clinical symptoms of ADHD. However, predicting clinical symptoms (i.e., inattention and impulsivity) is a challenging task based on neuroimaging data. The goal of this study is twofold: to build predictive models for clinical symptoms of ADHD based on resting-state fMRI and to mine brain networks for predictive patterns of inattention and impulsivity...
August 24, 2017: Neuroscience
https://www.readbyqxmd.com/read/28831377/centrality-of-prefrontal-and-motor-preparation-cortices-to-tourette-syndrome-revealed-by-meta-analysis-of-task-based-neuroimaging-studies
#6
Liliana Polyanska, Hugo D Critchley, Charlotte L Rae
Tourette Syndrome (TS) is a neurodevelopmental condition characterized by chronic multiple tics, which are experienced as compulsive and 'unwilled'. Patients with TS can differ markedly in the frequency, severity, and bodily distribution of tics. Moreover, there are high comorbidity rates with attention deficit hyperactivity disorder (ADHD), obsessive compulsive disorder (OCD), anxiety disorders, and depression. This complex clinical profile may account for apparent variability of findings across neuroimaging studies that connect neural function to cognitive and motor behavior in TS...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28700674/effects-of-taurine-on-resting-state-fmri-activity-in-spontaneously-hypertensive-rats
#7
Vincent Chin-Hung Chen, Tsai-Ching Hsu, Li-Jeng Chen, Hong-Chun Chou, Jun-Cheng Weng, Bor-Show Tzang
Attention deficit hyperactivity disorder (ADHD) is a global behavior illness among children and adults. To investigate the effects of taurine on resting-state fMRI activity in ADHD, a spontaneously hypertensive rat (SHR) animal model was adopted. Significantly decreased serum C-reactive protein (CRP) was detected in rats of Wistar Kyoto (WKY) high-taurine group and significantly decreased interleukin (IL)-1β and CRP were detected in rats of SHR low-taurine and high-taurine groups. Moreover, significantly higher horizontal locomotion was detected in rats of WKY low-taurine and SHR low-taurine groups than in those of controls...
2017: PloS One
https://www.readbyqxmd.com/read/28667891/anomalous-prefrontal-limbic-activation-and-connectivity-in-youth-at-high-risk-for-bipolar-disorder
#8
Kiki Chang, Amy Garrett, Ryan Kelley, Meghan Howe, Erica Marie Sanders, Tenah Acquaye, Layla Bararpour, Sherrie Li, Manpreet Singh, Booil Jo, Joachim Hallmayer, Allan Reiss
OBJECTIVE: Abnormal prefrontal-limbic brain activation in response to facial expressions has been reported in pediatric bipolar disorder (BD). However, it is less clear whether these abnormalities exist prior to onset of mania, thus representing a biomarker predicting development of BD. METHODS: We examined brain activation in 50 youth at high risk for BD (HR-BD), compared with 29 age- and gender-matched healthy control (HC) subjects. HR-BD was defined as having a parent with BD, as well as current mood or attentiondeficit/ hyperactivity disorder (ADHD) symptoms, or a history of at least one depressive episode...
November 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28659040/defining-the-neural-substrate-of-the-adult-outcome-of-childhood-adhd-a-multimodal-neuroimaging-study-of-response-inhibition
#9
Eszter Szekely, Gustavo P Sudre, Wendy Sharp, Ellen Leibenluft, Philip Shaw
OBJECTIVE: Understanding the neural processes tied to the adult outcome of childhood attention deficit hyperactivity disorder (ADHD) could guide novel interventions to improve its clinical course. It has been argued that normalization of prefrontal cortical activity drives remission from ADHD, while anomalies in subcortical processes are "fixed," present even in remission. Using multimodal neuroimaging of inhibitory processes, the authors tested these hypotheses in adults followed since childhood, contrasting remitted against persistent ADHD...
September 1, 2017: American Journal of Psychiatry
https://www.readbyqxmd.com/read/28657141/neural-correlates-of-atomoxetine-improving-inhibitory-control-and-visual-processing-in-drug-na%C3%A3-ve-adults-with-attention-deficit-hyperactivity-disorder
#10
Li-Ying Fan, Tai-Li Chou, Susan Shur-Fen Gau
Atomoxetine improves inhibitory control and visual processing in healthy volunteers and adults with attention-deficit/hyperactivity disorder (ADHD). However, little is known about the neural correlates of these two functions after chronic treatment with atomoxetine. This study aimed to use the counting Stroop task with functional magnetic resonance imaging (fMRI) and the Cambridge Neuropsychological Test Automated Battery (CANTAB) to investigate the changes related to inhibitory control and visual processing in adults with ADHD...
June 28, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28656805/verbal-working-memory-related-functional-connectivity-alterations-in-boys-with-attention-deficit-hyperactivity-disorder-and-the-effects-of-methylphenidate
#11
Zhao-Min Wu, Janita Bralten, Li An, Qing-Jiu Cao, Xiao-Hua Cao, Li Sun, Lu Liu, Li Yang, Maarten Mennes, Yu-Feng Zang, Barbara Franke, Martine Hoogman, Yu-Feng Wang
OBJECTIVE: Few studies have investigated verbal working memory-related functional connectivity patterns in participants with attention-deficit/hyperactivity disorder (ADHD). Thus, we aimed to compare working memory-related functional connectivity patterns in healthy children and those with ADHD, and study effects of methylphenidate (MPH). METHOD: Twenty-two boys with ADHD were scanned twice, under either MPH (single dose, 10 mg) or placebo, in a randomised, cross-over, counterbalanced placebo-controlled design...
June 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28655564/enhanced-limbic-impaired-cortical-loop-connection-onto-the-hippocampus-of-nhe-rats-application-of-resting-state-functional-connectivity-in-a-preclinical-adhd-model
#12
F Zoratto, G M Palombelli, L A Ruocco, E Carboni, G Laviola, A G Sadile, W Adriani, R Canese
Due to a hyperfunctioning mesocorticolimbic system, Naples-High-Excitability (NHE) rats have been proposed to model for the meso-cortical variant of attention deficit/hyperactivity disorder (ADHD). Compared to Naples Random-Bred (NRB) controls, NHE rats show hyperactivity, impaired non-selective attention (Aspide et al., 1998), and impaired selective spatial attention (Ruocco et al., 2009a, 2014). Alteration in limbic functions has been proposed; however, resulting unbalance among forebrain areas has not been assessed yet...
June 26, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28647012/striatal-activation-predicts-differential-therapeutic-responses-to-methylphenidate-and-atomoxetine
#13
Kurt P Schulz, Anne-Claude V Bédard, Jin Fan, Thomas B Hildebrandt, Mark A Stein, Iliyan Ivanov, Jeffrey M Halperin, Jeffrey H Newcorn
OBJECTIVE: Methylphenidate has prominent effects in the dopamine-rich striatum that are absent for the selective norepinephrine transporter inhibitor atomoxetine. This study tested whether baseline striatal activation would predict differential response to the two medications in youth with attention-deficit/hyperactivity disorder (ADHD). METHOD: A total of 36 youth with ADHD performed a Go/No-Go test during functional magnetic resonance imaging at baseline and were treated with methylphenidate and atomoxetine using a randomized cross-over design...
July 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28634439/inconsistency-in-abnormal-brain-activity-across-cohorts-of-adhd-200-in-children-with-attention-deficit-hyperactivity-disorder
#14
Jian-Bao Wang, Li-Jun Zheng, Qing-Jiu Cao, Yu-Feng Wang, Li Sun, Yu-Feng Zang, Hang Zhang
Many papers have shown results from the multi-site dataset of resting-state fMRI (rs-fMRI) in attention deficit hyperactivity disorder (ADHD), a data-sharing project named ADHD-200. However, few studies have illustrated that to what extent the pooled findings were consistent across cohorts. The present study analyzed three voxel-wise whole-brain metrics, i.e., amplitude of low-frequency fluctuation (ALFF), regional homogeneity (ReHo), and degree centrality (DC) based on the pooled dataset as well as individual cohort of ADHD-200...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28529874/shared-and-disorder-specific-task-positive-and-default-mode-network-dysfunctions-during-sustained-attention-in-paediatric-attention-deficit-hyperactivity-disorder-and-obsessive-compulsive-disorder
#15
Luke J Norman, Christina O Carlisi, Anastasia Christakou, Ana Cubillo, Clodagh M Murphy, Kaylita Chantiluke, Andrew Simmons, Vincent Giampietro, Michael Brammer, David Mataix-Cols, Katya Rubia
Patients with Attention-Deficit/Hyperactivity Disorder (ADHD) and obsessive/compulsive disorder (OCD) share problems with sustained attention, and are proposed to share deficits in switching between default mode and task positive networks. The aim of this study was to investigate shared and disorder-specific brain activation abnormalities during sustained attention in the two disorders. Twenty boys with ADHD, 20 boys with OCD and 20 age-matched healthy controls aged between 12 and 18 years completed a functional magnetic resonance imaging (fMRI) version of a parametrically modulated sustained attention task with a progressively increasing sustained attention load...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28433093/impact-of-a-common-genetic-variation-associated-with-putamen-volume-on-neural-mechanisms-of-attention-deficit-hyperactivity-disorder
#16
Bing Xu, Tianye Jia, Christine Macare, Tobias Banaschewski, Arun L W Bokde, Uli Bromberg, Christian Büchel, Anna Cattrell, Patricia J Conrod, Herta Flor, Vincent Frouin, Jürgen Gallinat, Hugh Garavan, Penny Gowland, Andreas Heinz, Bernd Ittermann, Jean-Luc Martinot, Marie-Laure Paillère Martinot, Frauke Nees, Dimitri Papadopoulos Orfanos, Tomáš Paus, Luise Poustka, Michael N Smolka, Henrik Walter, Robert Whelan, Gunter Schumann, Sylvane Desrivières
OBJECTIVE: In a recent genomewide association study of subcortical brain volumes, a common genetic variation at rs945270 was identified as having the strongest effect on putamen volume, a brain measurement linked to familial risk for attention-deficit/hyperactivity disorder (ADHD). To determine whether rs945270 might be a genetic determinant of ADHD, its effects on ADHD-related symptoms and neural mechanisms of ADHD, such as response inhibition and reward sensitivity, were explored. METHOD: A large population sample of 1,834 14-year-old adolescents was used to test the effects of rs945270 on ADHD symptoms assessed through the Strengths and Difficulties Questionnaire and region-of-interest analyses of putamen activation by functional magnetic resonance imaging using the stop signal and monetary incentive delay tasks, assessing response inhibition and reward sensitivity, respectively...
May 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28433092/behavioral-and-neural-sustained-attention-deficits-in-disruptive-mood-dysregulation-disorder-and-attention-deficit-hyperactivity-disorder
#17
David Pagliaccio, Jillian Lee Wiggins, Nancy E Adleman, Alexa Curhan, Susan Zhang, Kenneth E Towbin, Melissa A Brotman, Daniel S Pine, Ellen Leibenluft
OBJECTIVE: Disruptive mood dysregulation disorder (DMDD), characterized by severe irritability, and attention-deficit/hyperactivity disorder (ADHD) are highly comorbid. This is the first study to characterize neural and behavioral similarities and differences in attentional functioning across these disorders. METHOD: Twenty-seven healthy volunteers, 31 patients with DMDD, and 25 patients with ADHD (8 to 18 years old) completed a functional magnetic resonance imaging attention task...
May 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28423978/reward-processing-deficits-during-a-spatial-attention-task-in-patients-with-adhd-an-fmri-study
#18
Baris Metin, Zeynep C Tas, Merve Çebi, Ayşe Büyükaslan, Aysegül Soysal, Deniz Hatıloglu, Nevzat Tarhan
OBJECTIVE: In this study, we aimed to explore how cues signaling rewards and feedbacks about rewards are processed in ADHD. METHOD: Inside the scanner, 16 healthy children and 19 children with ADHD completed a spatial attention paradigm where cues informed about the availability of reward and feedbacks were provided about the earned reward. RESULTS: In ventral anterior thalamus (VA), the controls exhibited greater activation in response to reward-predicting cues, as compared with no-reward cues, whereby in the ADHD group, the reverse pattern was observed (nonreward > reward)...
April 1, 2017: Journal of Attention Disorders
https://www.readbyqxmd.com/read/28420972/multi-modal-multi-measure-and-multi-class-discrimination-of-adhd-with-hierarchical-feature-extraction-and-extreme-learning-machine-using-structural-and-functional-brain-mri
#19
Muhammad Naveed Iqbal Qureshi, Jooyoung Oh, Beomjun Min, Hang Joon Jo, Boreom Lee
Structural and functional MRI unveil many hidden properties of the human brain. We performed this multi-class classification study on selected subjects from the publically available attention deficit hyperactivity disorder ADHD-200 dataset of patients and healthy children. The dataset has three groups, namely, ADHD inattentive, ADHD combined, and typically developing. We calculated the global averaged functional connectivity maps across the whole cortex to extract anatomical atlas parcellation based features from the resting-state fMRI (rs-fMRI) data and cortical parcellation based features from the structural MRI (sMRI) data...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28417219/treatment-effect-of-methylphenidate-on-intrinsic-functional-brain-network-in-medication-na%C3%A3-ve-adhd-children-a-multivariate-analysis
#20
Jae Hyun Yoo, Dohyun Kim, Jeewook Choi, Bumseok Jeong
Methylphenidate is a first-line therapeutic option for treating attention-deficit/hyperactivity disorder (ADHD); however, elicited changes on resting-state functional networks (RSFNs) are not well understood. This study investigated the treatment effect of methylphenidate using a variety of RSFN analyses and explored the collaborative influences of treatment-relevant RSFN changes in children with ADHD. Resting-state functional magnetic resonance imaging was acquired from 20 medication-naïve ADHD children before methylphenidate treatment and twelve weeks later...
April 17, 2017: Brain Imaging and Behavior
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