scholarly journals Diminished modulation of preparatory sensorimotor mu rhythm predicts attention-deficit/hyperactivity disorder severity

2017 ◽  
Vol 47 (11) ◽  
pp. 1947-1956 ◽  
Author(s):  
N. ter Huurne ◽  
D. Lozano-Soldevilla ◽  
M. Onnink ◽  
C. Kan ◽  
J. Buitelaar ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Motor Activity ◽  
Attention Deficit ◽  
Rating Scale ◽  
Oscillatory Activity ◽  
Adhd Group ◽  
Mu Rhythm ◽  
Hyperactivity Disorder ◽  
Α Band ◽  
Μ Rhythm

BackgroundAttention-deficit/hyperactivity disorder (ADHD) is characterized by problems in regulating attention and in suppressing disruptive motor activity, i.e. hyperactivity and impulsivity. We recently found evidence that aberrant distribution of posterior α band oscillations (8–12 Hz) is associated with attentional problems in ADHD. The sensorimotor cortex also produces strong 8–12 Hz band oscillations, namely the μ rhythm, and is thought to have a similar inhibitory function. Here, we now investigate whether problems in distributing α band oscillations in ADHD generalize to the μ rhythm in the sensorimotor domain.MethodIn a group of adult ADHD (n = 17) and healthy control subjects (n = 18; aged 21–40 years) oscillatory brain activity was recorded using magnetoencephalography during a visuo-spatial attention task. Subjects had to anticipate a target with unpredictable timing and respond by pressing a button.ResultsPreparing a motor response, the ADHD group failed to increase hemispheric μ lateralization with relatively higher μ power in sensorimotor regions not engaged in the task, as the controls did (F1,33 = 8.70, p = 0.006). Moreover, the ADHD group pre-response μ lateralization not only correlated positively with accuracy (rs = 0.64, p = 0.0052) and negatively with intra-individual reaction time variability (rs = −0.52, p = 0.033), but it also correlated negatively with the score on an ADHD rating scale (rs = −0.53, p = 0.028).ConclusionsWe suggest that ADHD is associated with an inability to sufficiently inhibit task-irrelevant sensorimotor areas by means of modulating μ oscillatory activity. This could explain disruptive motor activity in ADHD. These results provide further evidence that impaired modulation of α band oscillations is involved in the pathogenesis of ADHD.

scholarly journals Gut microbiota signature in treatment-naïve attention-deficit/hyperactivity disorder

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vanesa Richarte ◽  
Cristina Sánchez-Mora ◽  
Montserrat Corrales ◽  
Christian Fadeuilhe ◽  
Laura Vilar-Ribó ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Gut Microbiota ◽  
Relative Abundance ◽  
Attention Deficit ◽  
Gut Microbiome ◽  
Rating Scale ◽  
Small Sample ◽  
Adhd Group ◽  
Healthy Controls ◽  
Hyperactivity Disorder

AbstractCompelling evidence supports alterations in gut microbial diversity, bacterial composition, and/or relative abundance of several bacterial taxa in attention-deficit/hyperactivity disorder (ADHD). However, findings for ADHD are inconsistent among studies, and specific gut microbiome signatures for the disorder remain unknown. Given that previous studies have mainly focused on the pediatric form of the disorder and involved small sample sizes, we conducted the largest study to date to compare the gastrointestinal microbiome composition in 100 medication-naïve adults with ADHD and 100 sex-matched healthy controls. We found evidence that ADHD subjects have differences in the relative abundance of several microbial taxa. At the family level, our data support a lower relative abundance of Gracilibacteraceae and higher levels of Selenomonadaceae and Veillonellaceae in adults with ADHD. In addition, the ADHD group showed higher levels of Dialister and Megamonas and lower abundance of Anaerotaenia and Gracilibacter at the genus level. All four selected genera explained 15% of the variance of ADHD, and this microbial signature achieved an overall sensitivity of 74% and a specificity of 71% for distinguishing between ADHD patients and healthy controls. We also tested whether the selected genera correlate with age, body mass index (BMI), or scores of the ADHD rating scale but found no evidence of correlation between genera relative abundance and any of the selected traits. These results are in line with recent studies supporting gut microbiome alterations in neurodevelopment disorders, but further studies are needed to elucidate the role of the gut microbiota on the ADHD across the lifespan and its contribution to the persistence of the disorder from childhood to adulthood.

EARLY RECOGNIZATION OF THE CHILDREN WITH ATTENTION DEFICIT HYPERACTIVITY DISORDER BY VANDERBILT ADHD RATING SCALE FOR TEACHERS AND PARENTS

2019 ◽  
pp. 85-91
Author(s):  
Dinh Duong Le ◽  
Van Thang Vo ◽  
Thi Mai Nguyen ◽  
Thi Han Vo ◽  
Huu Chau Duc Nguyen ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
High Risk ◽  
Attention Deficit ◽  
Primary Schools ◽  
Rating Scale ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Hyperactivity Disorder ◽  
Teachers And Parents ◽  
Key Words Adhd

Objectives: The study aims to explore the prevalence of attention deficit hyperactivity disorder and to examine the associated factors with ADHD among primary students by Vanderbilt ADHD rating scale for teacher and parents. Methods: A cross-sectional study design was conducted in 564 students who selected randomly in 4 primary schools in Hue city. Vanderbilt ADHD rating scale for parents and teachers were applied to evaluate the ADHD of children over 6 months ago. Results: The overall prevalence of children who had high risk with ADHD was 4.1% (95%CI: 2.44 - 5.72), including 4.6% and 4.8% in the rating of teachers and parents, respectively. Male was more likely to have ADHD than female (OR adj: 4.64 (95%CI: 1.53 - 14.05) and lack of closely friend (OR adj: 5.11 (95% CI: 2.13 - 12.24). Conclusion: Vanderbilt ADHD diagnosis rating scale for teachers and parents can be used to early recognization children with a high risk of ADHD. Key words: ADHD, Vanderbilt, ratings scale, teacher, parent, children

scholarly journals Psychometric Evaluation of the Persian Version of Barkley Adult Attention Deficit/Hyperactivity Disorder Screening Tool among the Elderly

Scientifica ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Mostafa Sadeghi ◽  
Homayoun Sadeghi-Bazargani ◽  
Shahrokh Amiri
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Internal Consistency ◽  
Attention Deficit ◽  
Concurrent Validity ◽  
Rating Scale ◽  
Retest Reliability ◽  
Hyperactivity Disorder ◽  
Persian Version ◽  
Test Retest Reliability ◽  
Tabriz City

Background. The Barkley Adult Attention Deficit/Hyperactivity Disorder (ADHD) Rating Scale-IV (BAARS-IV) was developed, and it demonstrated good psychometric properties. The BAARS-IV includes 27 questions on the symptoms of adult ADHD. The purpose of the present study is to investigate the psychometric testing of the Persian version of BAARS-IV among the elderlies in Tabriz City. Method. This cross-sectional study was conducted in Tabriz City—in the west of Iran—in 2015 via enrolling of 121 old-aged people. We did the process of translation and adaptation of BAARS-IV and examined its concurrent validity, internal consistency, and test-retest reliability. Result. The BAARS-IV demonstrated good internal consistency and test-retest reliability. Correlations between the BAARS-IV and the CAARS-S: SV were high and evidence supporting concurrent validity was revealed. Cronbach’s alpha for the overall scale and subscales stood at 0.89, 0.81, 0.66, 0.56, and 0.82, respectively. Conclusion. The Persian BAARS-IV showed acceptable reliability and validity. BAARS-IV was determined to be composed of internally consistent and psychometrically sound items.

Mainstream and Remedial School Attention Deficit Hyperactivity Disorder Boys: More Alike than Different

2005 ◽  
Vol 35 (1) ◽  
pp. 73-88
Author(s):  
J. B. Savitz ◽  
P. Jansen
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
Control Group ◽  
Adhd Group ◽  
Hyperactivity Disorder ◽  
Significant Difference ◽  
Executive Deficits ◽  
Mainstream School ◽  
The Difference ◽  
Neuropsychological Tasks

The literature on the neuropsychology of Attention Deficit Hyperactivity Disorder (ADHD) is plagued by inconsistent findings, which are usually attributed to a variety of extraneous variables. One of the most inadequately explored of these variables is the difference between ADHD children attending remedial and mainstream schools. This study aimed to investigate whether the performance of remedial and mainstream school ADHD boys differs on relevant neuropsychological tasks. The sample consisted of three groups of 8- to 12-year-old boys. Two of these groups consisted of children with ADHD: one from remedial schools and one from mainstream schools. The third group was made up of participants without ADHD, who attended mainstream schools. The performance of the remedial school learners on the Stroop, Lurian and cancellation tasks was investigated and compared to a mainstream school ADHD sample. The performance of the ADHD group as a whole was compared with that of a control group. No significant difference in performance was found between the two ADHD groups, except for the length of time taken to read words in the control condition of the Stroop. The control group out-performed the ADHD samples on the Stroop, Lurian and cancellation tasks. The findings suggest that mainstream and remedial ADHD boys do not differ in the severity of their executive deficits, but that boys with ADHD attending remedial schools may be more likely to have another learning disorder than their counterparts at mainstream schools.

Attention Deficit Hyperactivity Disorder, Creativity, and the Effects of Methylphenidate

PEDIATRICS ◽  
1993 ◽  
Vol 91 (4) ◽  
pp. 816-819
Author(s):  
Jeanne B. Funk ◽  
John B. Chessare ◽  
Michael T. Weaver ◽  
Anita R. Exley
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
Repeated Measures ◽  
Creative Thinking ◽  
Adhd Group ◽  
Hyperactivity Disorder ◽  
Significant Difference ◽  
Quasi Experimental ◽  
The Difference ◽  
Clinically Significant

Given that children with attention deficit hyperactivity disorder (ADHD) are more impulsive than peers, this study explored whether they are correspondingly more creative, and whether creativity declines when impulsivity is decreased through methylphenidate (Ritalin) therapy. A repeated-measures quasi-experimental design was used to compare the performance of 19 boys with previously diagnosed ADHD and 21 comparison boys aged 8 through 11 on two administrations of alternate forms of the Torrance Tests of Creative Thinking-Figural (nonverbal). Boys with ADHD received prescribed methylphenidate only for the first session. Overall, mean Torrance summary scores for comparison boys (mean = 115.1, SD = 16.1) were higher than for boys with ADHD (mean = 107.6, SD = 12.7). However, the difference between means was small (7%) and did not meet the 25% criterion for a clinically significant difference. No changes in performance over time (comparison group) or medication state (ADHD group) were observed. These data suggest that, when measured nonverbally, the creative thinking performance of boys with ADHD is not superior to that of peers who do not have ADHD. Regarding the effects of methylphenidate, prescribed therapy did not influence performance on this measure of creative thinking.

Availability of dopamine transporters and auditory P300 abnormalities in adults with attention-deficit hyperactivity disorder: preliminary results

CNS Spectrums ◽  
2017 ◽  
Vol 23 (4) ◽  
pp. 264-270 ◽  
Author(s):  
Ching-Lin Chu ◽  
I Hui Lee ◽  
Mei Hung Chi ◽  
Kao Chin Chen ◽  
Po See Chen ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
Photon Emission ◽  
Event Related Potentials ◽  
P300 Amplitude ◽  
Emission Computed Tomography ◽  
Adhd Group ◽  
Hyperactivity Disorder ◽  
Auditory P300 ◽  
Related Potentials

ObjectivePrevious studies have indicated that there is dopamine transporter (DAT) dysregulation and P300 abnormality in adults with attention-deficit hyperactivity disorder (ADHD); however, the correlations among the three have not been fully explored.MethodsA total of 11 adults (9 males and 2 females) with ADHD and 11 age-, sex-, and education-level-matched controls were recruited. We explored differences in DAT availability using single-photon emission computed tomography and P300 wave of event-related potentials between the two groups. The correlation between DAT availability and P300 performance was also examined.ResultsDAT availability in the basal ganglia, caudate nucleus, and putamen was significantly lower in the ADHD group. Adults with ADHD had lower auditory P300 amplitudes at the Pz and Cz sites, as well as longer Fz latency than controls. DAT availability was negatively correlated to P300 latency at Pz and Fz.ConclusionsAdults with ADHD had both abnormal DAT availability and P300 amplitude, suggesting that ADHD is linked to dysfunction of the central dopaminergic system and poor cognitive processes related to response selection and execution.

scholarly journals Examination of Retinal and Choroidal Structural Changes in Children With Attention Deficit/Hyperactivity Disorder

2021 ◽  
Author(s):  
Zeynep Sena Tosun ◽  
Ayse Vural Ozec ◽  
Haydar Erdogan ◽  
Erman Bozali ◽  
Duygu Yalınbas Yeter ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Ganglion Cell ◽  
Attention Deficit ◽  
Choroidal Thickness ◽  
Ganglion Cell Layer ◽  
Cell Layer ◽  
Adhd Group ◽  
Ophthalmological Examination ◽  
Hyperactivity Disorder ◽  
Significant Difference

Abstract Objective Examination of retinal nerve, ganglion cell layer thickness and choroidal thickness in patients with Attention Deficit Hyperactivity Disorder by optical coherence tomography (OCT). Method : 30 individuals with Attention Deficit Hyperactivity Disorder and 30 healthy individuals compatible in terms of age and gender who applied to the Ophthalmology outpatient clinic for control were included in the study. The right and left eye data of the participants were used in statistical analysis. In addition to full ophthalmological examination (best corrected visual acuity, biomicroscopy, fundus examination), retinal nerve fiber layer (RNFL), ganglion cell layer (GCL) and macular choroidal thickness (MCT) were measured by OCT. RNFL, GCL and MCT measurements were compared between the groups. Conclusion There was no significant difference between the RNFL and GCL thickness values of the individuals in both groups (p > 0.05). When compared in terms of choroidal thickness, left eye su bfoveal choroidal thickness (p = 0.036, p < 0.05) and 2 mm temporal choroidal thickness were significantly higher in the ADHD group than in the control group (p = 0.034, p < 0.05). Discussion The aim of this study was to determine the clinical features of the eyes of children with ADHD. Cross-sectional studies with larger participation are needed to determine RNFL, GCL and choroidal changes.

Vortioxetine for attention deficit hyperactivity disorder in adults: A randomized, double-blind, placebo-controlled, proof-of-concept study

2019 ◽  
Vol 33 (4) ◽  
pp. 511-521 ◽  
Author(s):  
Joseph Biederman ◽  
Annika Lindsten ◽  
Lasse B Sluth ◽  
Maria Louise Petersen ◽  
Anders Ettrup ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
Adult Adhd ◽  
Rating Scale ◽  
Stage I ◽  
Proof Of Concept ◽  
Double Blind ◽  
Patient Functioning ◽  
Concept Study ◽  
Hyperactivity Disorder

Background: Stimulants remain the mainstay of treatment for attention-deficit hyperactivity disorder (ADHD) but are often associated with insufficient response or poor tolerability, leading to many patients not wishing to be treated with controlled substances. Aims: This randomized, placebo-controlled, proof-of-concept study (NCT02327013) evaluated the efficacy of a multimodal antidepressant, vortioxetine, in the treatment of ADHD, using a two-stage sequential parallel comparison design. Methods: Patients aged 18–55 years with a diagnosis of ADHD (DSM-5) and a total score ⩾24 on the Adult ADHD Investigator Symptom Rating Scale (AISRS) were randomized in study stage I with a 1:1:3 ratio to six weeks of treatment with vortioxetine 10 or 20 mg/day, or placebo ( n = 227). In study stage II, placebo non-responders (AISRS total score reduction <30% from stage I baseline) were re-randomized with a 1:1:1 ratio to six weeks of vortioxetine 10 or 20 mg/day, or placebo ( n = 59). Results: Across the two study stages combined, ADHD symptoms improved by approximately eight AISRS points in all treatment groups, showing no difference from placebo for either dose of vortioxetine, the study thus failing to meet its primary endpoint. However, both doses of vortioxetine separated from placebo in improving overall patient functioning, as measured by the Sheehan Disability Scale. Conclusion: Studies are warranted to further investigate this suggested benefit of a multimodal antidepressant for patient functioning in ADHD while addressing issues of non-adherence and placebo response. The study confirmed vortioxetine 10 mg and 20 mg as generally well-tolerated.

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