Features Of Attention Deficit Hyperactivity Disorder Research Articles

Involuntary remembering and ADHD: Do individuals with ADHD symptoms experience high volumes of involuntary memories in everyday life?

Spontaneous mind wandering has been implicated as a feature of attention-deficit/hyperactivity disorder (ADHD) and researchers have wondered if spontaneous remembering is also a feature of ADHD. In this study, we compared spontaneous cognition, principally involuntary autobiographical memories, in participants who scored inside the ADHD range on BAARS-IV to those who scored outside of the ADHD range. In Study 1, participants reported their involuntary memories and spontaneous thoughts on a laboratory measure of involuntary memory (the vigilance task), as well as estimated their daily involuntary memory frequencies on a separate questionnaire. The results showed that ADHD range participants did not differ from non-ADHD range participants in reports of involuntary memories and spontaneous thoughts on the vigilance task, but ADHD range participants estimated higher daily involuntary memory frequencies than non-ADHD range participants on the questionnaire. Additionally, on the questionnaire, ADHD participants reported that their involuntary memories were less positive and more repetitive than non-ADHD participants. In Study 2, participants recorded their naturally occurring involuntary memories in a structured diary for 48 hours. The results showed that ADHD range participants had more involuntary memories than non-ADHD range participants, and they also reported that they experienced them as less positive.

Frequency and Mental Health Condition of Students with Developmental Disabilities Among First-Year Japanese University Students: A Cross-Sectional Survey.

Students with developmental disabilities are anxious about a change in environment when graduating from high school to college. Existing research, which is scarce, focuses on the mental health status of students with developmental disabilities entering university. This study investigated the frequency of autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD) among first-year Japanese university students and their mental health risks post-admission. We conducted a cross-sectional survey for university students within a month of admission, using the Autism Spectrum Quotient (AQ) and Adult ADHD Test (A-ADHD) to demonstrate the frequency of ASD and ADHD. The Counseling Center Assessment of Psychological Symptoms (CCAPS)-Japanese (depression, eating concerns, hostility, social anxiety, family distress, alcohol use, generalized anxiety, and academic distress) evaluated their mental health condition.Of 711 students (20.3 ± 2.1years; 330 male, 381 female), the number of those showing either ASD or ADHD tendencies was 61 (8.58%). Twenty-three (3.23%) showed symptoms of only ASD, 34 (4.78%) of ADHD, and four (0.56%) of ASD and ADHD. No significant differences existed in the frequency of ASD and ADHD between each sex and major. The scores and frequency of high risk (over the cut-off points) students on all CCAPS-Japanese subscales (except alcohol use) were significantly higher among the ASD and ADHD groups than the control group, which showed no ASD or ADHD tendencies. The frequency of ASD and ADHD characteristics among first-year Japanese university students was 8.58%. They have a high risk of mental health problems when they enter university.

The Creative Awareness Theory: A Grounded Theory Study of Inherent Self-Regulation in Attention Deficit Hyperactivity Disorder

Objectives: The aim of this study was to determine why and how adults with attention deficit hyperactivity disorder (ADHD) experience variable impairment and identify the processes and strategies adults with ADHD use to develop positive self-regulation skills. Methods: A mixed cohort of 11 participants (6 female and 5 male) from a university, an adult ADHD clinic and an ADHD support group in the UK were interviewed online between September 2021 and February 2022. Data were collected and analysed simultaneously, inspired by a constructivist grounded theory methodology. Results: Participants described a “polar awareness of difference” from others in terms of engagement and ADHD characteristics, and a “polar awareness of consciousness” experienced as the states of chaotic attention and hyperfocus, both of which impact core perceptions of self. Using an infinity paradigm, the results demonstrate unskilled attempts to self-regulate within and between these states using self-absorption or self-transcendence strategies, including their inherent challenges and energetic cost. Our results further indicate that at the centre of this dynamic paradigm, creative awareness strategies exist, which exemplify polarity awareness and the regulation of that awareness supported by an authentic inner compass (AIC). Conclusions: This paper presents the empirical foundation for the ADHD Creative Awareness Theory (CAT)—a new theory for understanding the experience of ADHD consciousness and environmental engagement. Practical implications are explored, and recommendations include use of the CAT as a framework for understanding and development of inherent self-regulation skills for adults with ADHD.

Investigating Attention Deficit Hyperactivity Disorder Symptoms, Emotional Dysregulation and Family Functioning in Children: A Community-Based Study in Elementary Schools in Surabaya, Indonesia.

Research on emotional dysregulation related to attention deficit hyperactivity disorder (ADHD) symptoms and its effects on family functioning in children is scarce. This is the first study conducted in Indonesia to examine the intricate relationships between ADHD symptoms, emotional regulation, and family functioning in children. A cross-sectional survey was conducted involving primary caregivers of children aged 9-13 years old across three elementary schools in Surabaya, using validated questionnaires comprising the Indonesian ADHD Rating Scale, Emotion Regulation Checklist, and Family APGAR scale. The findings revealed a positive association between ADHD features and the emotional lability/negativity subscale (ERLN) (r=0.528; p<0.001), but not the emotion regulation subscale (EREG). Moreover, family functioning positively correlated with ERLN (r= -0.269; p=0.003) and negatively correlated with EREG (r=0.331; p<0.001). Parental education emerged as a significant demographic factor, with higher education levels linked to better emotion regulation (r=0.297; p=0.001). These findings underscore the importance of addressing ADHD symptoms and emotional dysregulation in children in order to enhance family functioning and overall well-being. Implications for future research and interventions targeting emotion regulation, especially in children with ADHD and their families, are also discussed.

Agressividade e criminalidade em adultos com TDAH

Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental condition commonly diagnosed in childhood, but which persists in about 2.5% of adults. This disorder is associated with a higher risk of developing mood disorders, anxiety, substance use, and personality disorders. Impulsivity, a central feature of ADHD, contributes to difficulty in self-control, which can lead to aggressive behaviors. Studies show that individuals with ADHD are more likely to be involved in criminal activities, and impulsivity and lack of emotional control are key factors in this relationship. Difficulties in emotional regulation and personal organization also negatively affect the interpersonal relationships and professional lives of these individuals, increasing the risk of marital separations, divorces, and problems at work. When driving, adults with ADHD are at greater risk of accidents, due to inattention and difficulties in maintaining control of the vehicle. Specific interventions, such as the appropriate use of medications and driving techniques, are recommended to mitigate these risks. Early diagnosis and treatment of ADHD, especially in adults who exhibit aggressive behaviors, are crucial. Treatment programs that combine medication with psychosocial approaches can significantly improve social functioning and reduce crime rates in this population, highlighting the importance of integrated and personalized interventions.

PSYCHODYNAMIC PSYCHOTHERAPY FOR TIME DISTORTION IN ATTENTION DEFICIT HYPERACTIVITY DISORDER

Psychodynamic psychotherapy does not feature in current treatment guidelines for attention‐deficit hyperactivity disorder (ADHD) in the United Kingdom. However, there is some psychoanalytic understanding of the disorder, which is corroborated in current neuroscientific theory, and supports clinicians in thinking beyond the behaviourally biased diagnosis and treatment models. One of the core features of ADHD is distortions in chronoception. This clinical paper therefore explores the psychoanalytic and neuroscientific theories of time perception as a way of exploring a discrete element of the complex idea of executive functioning more generally. It supports therapists approaching such executive dysfunction and to reconsider the treatment guidelines. A case example is used to explore how a transference‐, affect‐ and relationally‐focussed therapy can effect lasting change for people with ADHD in a way that behavioural and medication approaches do not. It is argued that such an intervention can improve oscillatory attention between subjective‐ and objective‐time and increase the capacity to self‐contain emotions. This brings patients into alignment with reality and restarts their psychic development towards themselves, others, the parental couple and grieving, which stalled in infancy. The internalised schema of the 50‐minute therapy session also provides a frame of reference for future tasks.

Attention Deficit / Hyperactivity Disorder and Paediatric Dentistry

Aim: Attention Deficit/Hyperactivity Disorder (ADHD) restlessness one of the most frequently diagnosed neurodevelopmental and neurobehavioral disorders in children, with a higher incidence observed in boys compared to girls. The fundamental characteristics of ADHD include three main symptoms: pronounced lack of attention, excessive hyperactivity, and impulsive behaviour. Materials and Methods: The diagnostic process for ADHD is complex and multidimensional, involving a thorough analysis of behaviour, collection of extensive and detailed information, comprehensive evaluation of the child’s developmental history, and intensive collaboration between various specialists, including educators, psychologists, paediatricians, dentists as well as active participation of parents or guardians. With the increasing number of diagnosed cases of ADHD globally, it becomes increasingly important to timely recognize the symptoms and symptomatology of the disorder and to apply appropriate therapeutic strategies and treatment methods tailored to the individual needs of each child. Results: Dental care requires special attention in the context of ADHD. Children with ADHD face greater challenges in maintaining oral hygiene, leading to an increased risk of dental caries, more frequent oral traumas, and generally poorer oral health conditions. Conclusion: It is crucial to ensure a tailored approach during dental treatment, which may include establishing special communication and techniques adapted to the child, as well as increasing the frequency of preventive check-ups and interventions to preserve and enhance oral health.

Attention-deficit/hyperactivity disorder (ADHD) in cultural context II: a comparison of the links between ADHD symptoms and waiting-related responses in Hong Kong and UK.

The concept of attention-deficit/hyperactivity disorder (ADHD) is considered to have cross-cultural validity, but direct comparisons of its psychological characteristics across cultures are limited. This study investigates whether preschool children's ADHD symptoms expressed in two cultures with different views about child behaviour and parenting, Hong Kong and the UK, show the same pattern of associations with their waiting-related abilities and reactions, an important marker of early self-regulation. A community sample of 112 preschoolers (mean age = 46.22 months; 55 from UK, 57 from HK) completed three tasks measuring different waiting elements - waiting for rewards, choosing the amount of time to wait, and having to wait unexpectedly when a task is interrupted. Participants' waiting-related behavioural and emotional reactions were coded. Parents rated their children's ADHD symptoms and delay aversion. Our findings revealed that the associations between ADHD symptoms and waiting-related responses were comparable in both UK and HK samples. This suggests that the core psychological characteristics of ADHD, particularly in relation to waiting behaviours, may exhibit similarity across cultural contexts. Future research can extend this cross-cultural analysis to other ADHD-related psychological domains and explore additional cultural settings.

Patient, supporter and primary healthcare professional perspectives on health risks in over 16s with attention deficit hyperactivity disorder (ADHD) in England: a national survey study

BackgroundCurrent research suggests that people with attention deficit hyperactivity disorder (ADHD) are at higher risk of physical and mental health disorders. This study aimed to explore these health risks in ADHD from the perspectives of multiple stakeholders.MethodsThis study forms part of the ‘Managing young people with ADHD in Primary care (MAP) study’. A survey developed by the study team was distributed to over 16 year olds with ADHD, their supporters, primary healthcare professionals and health commissioners across England, via social media and through patient/clinical networks (September—October 2022). This survey contained two questions on health risks. Question one asked about views on health risks in ADHD (free text). Question two asked about advice given (options list and free text). Descriptive statistics summarised responses to questions one and two, and qualitative analysis (reflexive thematic analysis) was used to explore free text responses from question one.Results782 participants responded to the MAP survey. Of these, 206 healthcare professionals, 157 people with ADHD and 88 supporters answered question one. The most mentioned perceived risks were substance misuse, sleep disorders, weight management and smoking. More people with ADHD reported disordered eating as a health risk (n = 32) than healthcare professionals (n = 5). Generated themes included perceived health risks, impact of living with ADHD, lack of adequate healthcare, and need for ADHD awareness. In respect to advice given (question two), based on responses from 258 professionals, 162 people with ADHD and 100 supporters, the most common advice discussed in consultation was mental health (n = 149, n = 50 and n = 17 respectively). High numbers of respondents reported not giving/receiving advice on wider health (n = 38, n = 88 and n = 61 respectively).ConclusionsFindings demonstrate that respondents perceived a range of physical and mental health risks posed by ADHD. These related to difficulties with activities of daily living, as well as healthcare interactions and the impact of core features of ADHD (e.g. impulsivity, emotional dysregulation). These risks are not currently explicitly addressed in United Kingdom national guidance on ADHD. More work is needed to examine and address the broader health outcomes of people with ADHD.

Microstructural neural correlates of maximal grip strength in autistic children: the role of the cortico-cerebellar network and attention-deficit/hyperactivity disorder features.

Maximal grip strength, a measure of how much force a person's hand can generate when squeezing an object, may be an effective method for understanding potential neurobiological differences during motor tasks. Grip strength in autistic individuals may be of particular interest due to its unique developmental trajectory. While autism-specific differences in grip-brain relationships have been found in adult populations, it is possible that such differences in grip-brain relationships may be present at earlier ages when grip strength is behaviorally similar in autistic and non-autistic groups. Further, such neural differences may lead to the later emergence of diagnostic-group grip differences in adolescence. The present study sought to examine this possibility, while also examining if grip strength could elucidate the neuro-motor sources of phenotypic heterogeneity commonly observed within autism. Using high resolution, multi-shell diffusion, and quantitative R1 relaxometry imaging, this study examined how variations in key sensorimotor-related white matter pathways of the proprioception input, lateral grasping, cortico-cerebellar, and corticospinal networks were associated with individual variations in grip strength in 68 autistic children and 70 non-autistic (neurotypical) children (6-11 years-old). In both groups, results indicated that stronger grip strength was associated with higher proprioceptive input, lateral grasping, and corticospinal (but not cortico-cerebellar modification) fractional anisotropy and R1, indirect measures concordant with stronger microstructural coherence and increased myelination. Diagnostic group differences in these grip-brain relationships were not observed, but the autistic group exhibited more variability particularly in the cortico-cerebellar modification indices. An examination into the variability within the autistic group revealed that attention-deficit/hyperactivity disorder (ADHD) features moderated the relationships between grip strength and both fractional anisotropy and R1 relaxometry in the premotor-primary motor tract of the lateral grasping network and the cortico-cerebellar network tracts. Specifically, in autistic children with elevated ADHD features (60% of the autistic group) stronger grip strength was related to higher fractional anisotropy and R1 of the cerebellar modification network (stronger microstructural coherence and more myelin), whereas the opposite relationship was observed in autistic children with reduced ADHD features. Together, this work suggests that while the foundational elements of grip strength are similar across school-aged autistic and non-autistic children, neural mechanisms of grip strength within autistic children may additionally depend on the presence of ADHD features. Specifically, stronger, more coherent connections of the cerebellar modification network, which is thought to play a role in refining and optimizing motor commands, may lead to stronger grip in children with more ADHD features, weaker grip in children with fewer ADHD features, and no difference in grip in non-autistic children. While future research is needed to understand if these findings extend to other motor tasks beyond grip strength, these results have implications for understanding the biological basis of neuromotor control in autistic children and emphasize the importance of assessing co-occurring conditions when evaluating brain-behavior relationships in autism.

Autism and attention-deficit/hyperactivity disorder in children with Dravet syndrome: A population-based study.

To identify on a population basis the prevalence of autism and attention-deficit/hyperactivity disorder (ADHD) in children with Dravet syndrome and factors associated with symptoms of autism and ADHD. Forty-one of 48 children with Dravet syndrome living in Sweden, born between 1st January 2000 and 31st December 2018 underwent assessment including measures of autism and ADHD. Diagnoses of autism and ADHD were made with respect to DSM-5 criteria. Factors associated with features of autism and ADHD were analysed via regression. Twenty-five of the 41 children fulfilled DSM-5 criteria for autism spectrum disorder and 12 of 37 children considered for an ADHD diagnosis fulfilled DSM-5 criteria for ADHD. Severe intellectual disability was significantly associated with a greater degree of autistic features (p < 0.001) and a DSM-5 diagnosis of autism spectrum disorder (p = 0.029). Younger children had significantly more features of ADHD (p = 0.004) and features of inattention were significantly more common than features of hyperactivity/impulsivity (p < 0.001). Children with Dravet syndrome often have significant features of autism and ADHD, primarily inattentive type. Screening for autism and ADHD should be routine in children with Dravet syndrome. In total, 25 of 41 assessed children with Dravet syndrome fulfilled DSM-5 criteria for autism. Twelve of 37 assessed children with Dravet Syndrome met DSM-5 criteria for attention-deficit/hyperactivity disorder (ADHD). Severe intellectual disability was significantly associated with a greater degree of autism spectrum disorder features. Younger children had significantly more features of ADHD.

Attention deficit hyperactivity disorder in adults : prevalence and association with addictive disorders

Introduction Attention deficit hyperactivity disorder (ADHD) is a neurobehavioral disorder witch assumed to be a disorder of childhoood but recently has been shown to persist into adulthood. As in children, core features of adult ADHD include inattention, impulsivity, and/or hyperactivity.Despite growing interest in adult ADHD, little is known about its prevalence or correlates.ObjectivesWe aimed to estimate the prevalence of ADHD in adult outpatient psychiatric care at the university hospital of Gabes (southern Tunisia) and to explore its association with addictive disorders.MethodsWe conducted a cross-sectional, descriptive, and analytical observation study,in the outpatient psychiatry department of the Gabes university hospital, during the period ranging from 1/1/2023 to 30/06/2023. We used an anonymous pre-established information sheet exploring the socio-demographic, clinical, therapeutic data of the patients, lifestyle habits and substance use, the DSM-5 to classify diagnoses, CGI-S to rate the severity of overall mental illness, Fagerström test to assess the nicotine dependence, Adult ADHD Self-Report Scale (ASRS) in its validated Arabic version to screen ADHD and the Diagnostic Interview for ADHD in Adults (DIVA) to confirm the ADHD diagnosis. Data entry and analysis were performed using Statistical Package for Social Sciences (SPSS) version 21.0.Results The response rate in our study was around 64.5%, 205 patients were included.The mean age of the patients was 48years ±14.9, the male/female ratio was 1.The estimated prevalence of adult ADHD according to the DIVA was 5.9% (male/female ratio=1/2). At the uni-variate study, significant associations were found between ADHD and the age category (p=0), the marital status (OR=0.14; CI [0.03- 0.55], p=0.003), theFagestrom score (p=0.01), cannabis consumption (OR=19; CI [1.8-201], p=0.018), psychotropic drugs consumption (OR=39; CI[3-196], p=0.02), self-harm behavior (OR=6.9, CI[1.9-26], p=0.01), excessive use of internet and screens (OR=38, CI[7-179],p=0). At the multivariate study, two determining factors were found: cannabis consumption(OR=8 [1- 58]; p=0.031), and the excessive use of internet and screens (OR=25 [4-144]; p=0).Conclusions Regarding our findings and the important prevalence of the adult ADHD,more efforts are needed to increase the detection and treatment of this disorder, in order to set up an early intervention before major impairments and complications become irreversible.Disclosure of InterestNone Declared

Gray matter volume associations in youth with ADHD features of inattention and hyperactivity/impulsivity.

Prior research has shown smaller cortical and subcortical gray matter volumes among individuals with attention-deficit/hyperactivity disorder (ADHD). However, neuroimaging studies often do not differentiate between inattention and hyperactivity/impulsivity, which are distinct core features of ADHD. The present study uses an approach to disentangle overlapping variance to examine the neurostructural heterogeneity of inattention and hyperactivity/impulsivity dimensions. We analyzed data from 10,692 9- to 10-year-old children from the Adolescent Brain Cognitive Development (ABCD) Study. Confirmatory factor analysis was used to derive factors representing inattentive and hyperactive/impulsive traits. We employed structural equation modeling to examine these factors' associations with gray matter volume while controlling for the shared variance between factors. Greater endorsement of inattentive traits was associated with smaller bilateral caudal anterior cingulate and left parahippocampal volumes. Greater endorsement of hyperactivity/impulsivity traits was associated with smaller bilateral caudate and left parahippocampal volumes. The results were similar when accounting for socioeconomic status, medication, and in-scanner motion. The magnitude of these findings increased when accounting for overall volume and intracranial volume, supporting a focal effect in our results. Inattentive and hyperactivity/impulsivity traits show common volume deficits in regions associated with visuospatial processing and memory while at the same time showing dissociable differences, with inattention showing differences in areas associated with attention and emotion regulation and hyperactivity/impulsivity associated with volume differences in motor activity regions. Uncovering such biological underpinnings within the broader disorder of ADHD allows us to refine our understanding of ADHD presentations.

Sensorimotor Features and Daily Living Skills in Autistic Children With and Without ADHD.

Attention-deficit/hyperactivity disorder (ADHD) commonly co-occurs in autistic children. However, additional research is needed to explore the differences in motor skills and sensory features in autistic children with and without ADHD, as well as the impacts of these factors on daily living skills (DLS).This observational study sought to fill this gap with 67 autistic children (6.14-10.84 years-old), 43 of whom had ADHD.Autistic children with ADHD demonstrated higher sensory features and lower motor skills than autistic children without ADHD. In examining autism and ADHD features dimensionally, we found that overall sensory features, seeking, and hyporesponsiveness were driven by both autism and ADHD features, whereas motor skills, enhanced perception, and hyperresponsiveness were driven by only autism features. Additionally, in using these dimensional variables of autism and ADHD features, we found that differences in motor skills, sensory and autism features, but not ADHD features, impact DLS of autistic children, with autism features and motor skills being the strongest individual predictors of DLS.Together, these results demonstrate the uniqueness of motor skills and sensory features in autistic children with and without ADHD, as well as how autism features, sensory features, and motor skills contribute to DLS, emphasizing the importance of a comprehensive understanding of each individual and complexities of human development when supporting autistic children.

Dynamics of Learning in Neural Networks: A Gaussian Profile Approach

This article explores the impact of learning on the connection strengths between nodes in a recurrent associative attractor network, utilizing a Gaussian firing profile to simulate the adaptive nature of neural connections. Initially, the network exhibits uniform connec- tion strengths, symbolizing a naive state without prior learning. Through a computational model, we demonstrate how learning processes can dynamically adjust these connec- tions, emphasizing the strengthening of associations between spatially or functionally proximate nodes. The model employs a Gaussian function to adjust connection strengths based on node proximity, effectively mimicking biological learning mechanisms. Post- learning, nodes are reordered based on their connection strengths to reveal the emergent network structure, offering insights into how neural networks can evolve to represent and recall associative memories. This study not only sheds light on the fundamental aspects of neural plasticity but also provides a computational framework for simulating learning and memory formation in artificial neural networks.

Common and distinct cortical thickness alterations in youth with autism spectrum disorder and attention-deficit/hyperactivity disorder

BackgroundAutism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD) are neurodevelopmental disorders with overlapping behavioral features and genetic etiology. While brain cortical thickness (CTh) alterations have been reported in ASD and ADHD separately, the degree to which ASD and ADHD are associated with common and distinct patterns of CTh changes is unclear.MethodsWe searched PubMed, Web of Science, Embase, and Science Direct from inception to 8 December 2023 and included studies of cortical thickness comparing youth (age less than 18) with ASD or ADHD with typically developing controls (TDC). We conducted a comparative meta-analysis of vertex-based studies to identify common and distinct CTh alterations in ASD and ADHD.ResultsTwelve ASD datasets involving 458 individuals with ASD and 10 ADHD datasets involving 383 individuals with ADHD were included in the analysis. Compared to TDC, ASD showed increased CTh in bilateral superior frontal gyrus, left middle temporal gyrus, and right superior parietal lobule (SPL) and decreased CTh in right temporoparietal junction (TPJ). ADHD showed decreased CTh in bilateral precentral gyri, right postcentral gyrus, and right TPJ relative to TDC. Conjunction analysis showed both disorders shared reduced TPJ CTh located in default mode network (DMN). Comparative analyses indicated ASD had greater CTh in right SPL and TPJ located in dorsal attention network and thinner CTh in right TPJ located in ventral attention network than ADHD.ConclusionsThese results suggest shared thinner TPJ located in DMN is an overlapping neurobiological feature of ASD and ADHD. This alteration together with SPL alterations might be related to altered biological motion processing in ASD, while abnormalities in sensorimotor systems may contribute to behavioral control problems in ADHD. The disorder-specific thinner TPJ located in disparate attention networks provides novel insight into distinct symptoms of attentional deficits associated with the two neurodevelopmental disorders.Trial registrationPROSPERO CRD42022370620. Registered on November 9, 2022.

Functional connectivity and complexity analyses of resting-state fMRI in pre-adolescents demonstrating the behavioral symptoms of ADHD

Attention deficit hyperactivity disorder (ADHD) has been characterized by impairments among distributed functional brain networks, e.g., the frontoparietal network (FPN), default mode network (DMN), reward and motivation-related circuits (RMN), and salience network (SAL). In the current study, we evaluated the complexity and functional connectivity (FC) of resting state fMRI (rsfMRI) in pre-adolescents with the behavioral symptoms of ADHD, for pathology-relevant networks.We leveraged data from the Adolescent Brain and Cognitive Development (ABCD) Study. The final study sample included 63 children demonstrating the behavioral features of ADHD and 92 healthy control children matched on age, sex, and pubertal development status. For selected regions in the relevant networks, ANCOVA compared multiscale entropy (MSE) and FC between the groups. Finally, differences in the association between MSE and FC were evaluated.We found significantly reduced MSE along with increased FC within the FPN of pre-adolescents demonstrating the behavior symptoms of ADHD compared to matched healthy controls. Significant partial correlations between MSE and FC emerged in the FPN and RMN in the healthy controls however the association was absent in the participants demonstrating the behavior symptoms of ADHD.The current findings of complexity and FC in ADHD pathology support hypotheses of altered function of inhibitory control networks in ADHD.

Similar Gap-Overlap Profiles in Children with Fragile X Syndrome and IQ-Matched Autism.

Fragile X syndrome (FXS) is a single-gene disorder characterized by moderate to severe cognitive impairment and a high association with autism spectrum disorder (ASD) and Attention-Deficit/Hyperactivity Disorder (ADHD). Atypical visual attention is a feature of FXS, ASD, and ADHD. Thus, studying early attentional patterns in young children with FXS can offer insight into early emerging neurocognitive processes underlying challenges and contribute to our understanding of common and unique features of ASD and ADHD in FXS. The present study examined visual attention indexed by the gap-overlap paradigm in children with FXS (n = 39) compared to children with ASD matched on intellectual ability and age (n = 40) and age-matched neurotypical controls (n = 34). The relationship between gap-overlap performance and intellectual ability, ASD, and ADHD across groups was characterized. Saccadic reaction times (RT) were collected across baseline, gap, and overlap conditions. Results indicate no group differences in RT for any conditions. However, RT of the ASD and NT groups became slower throughout the experiment whereas RT of the FXS group did not change, suggesting difficulties in habituation for the FXS group. There was no relationship between RT and intellectual ability, ADHD, or ASD symptoms in the FXS and ASD groups. In the NT group, slower RT was related to elevated ADHD symptoms only. Taken together, findings suggest that the social attention differences documented in FXS and ASD may be due to other cognitive factors, such as reward or motivation, rather than oculomotor control of visual attention.

The impact of emotional dysregulation and comorbid depressive symptoms on clinical features, brain arousal, and treatment response in adults with ADHD.

The role of emotional dysregulation (ED) in attention-deficit/hyperactivity disorder (ADHD) has become an important issue. This study, in which we analyzed data from a predictive pharmaco-EEG-trial, aimed to examine whether symptoms of ED in adult ADHD affect ADHD symptom severity, brain arousal regulation as measured by resting EEG, and the response to stimulant medication. ED is defined as having a sex- and age-corrected T-score of >70 on the emotional lability subscale of the German version of Conners' Adult ADHD Rating Scale. A total of 115 participants were included in the study, 56 of whom had ED. Participants with ED were more impaired in terms of the severity of core ADHD symptoms, especially inattentive symptoms, comorbid depressive symptoms, interpersonal relationships, and quality of life. In addition, participants with ED were more likely to report a total score above 13 on the Beck Depression Inventory-II, which was considered to be the cutoff for mild depression. No differences were found between the ED and non-ED groups in response to stimulant medication or in brain arousal regulation. In addition, there was no significant effect of ED with comorbid depressive symptoms on treatment response. There was a trend for subgroups that showed a change in brain arousal regulation associated with symptom improvement. Our findings may support the assumption that ED may be an important feature of ADHD. The use of EEG-based brain arousal regulation as a diagnostic and predictive tool in ADHD in the presence of ED and comorbid depressive symptoms should be further investigated.

Temporal Alpha Dissimilarity of ADHD Brain Network in Comparison With CPT and CATA.

Attention deficit hyperactivity disorder (ADHD) is a chronic neurological and psychiatric disorder that affects children during their development. To find neural patterns for ADHD and provide subjective features as decision references to assist specialists and physicians. Many studies have been devoted to investigating the neural dynamics of the brain through resting-state or continuous performance tests (CPT) with EEG or functional magnetic resonance imaging (fMRI). The present study used coherence, which is one of the functional connectivity (FC) methods, to analyze the neural patterns of children and adolescents (8-16 years old) under CPT and continuous auditory test of attention (CATA) task. In the meantime, electroencephalography (EEG) oscillations were recorded by a wireless brain-computer interface (BCI). 72 children were enrolled, of which 53 participants were diagnosed with ADHD and 19 presented to be typical developing (TD). The experimental results exhibited a higher difference in alpha and theta bands between the TD group and the ADHD group. While the differences between the TD group and the ADHD group in all four frequency domains were greater than under CPT conditions. Statistically significant differences ( [Formula: see text]) were observed between the ADHD and TD groups in the alpha rhythm during the CATA task in the short-range of coherence. For the temporal lobe FC during the CATA task, the TD group exhibited statistically significantly FC ( [Formula: see text]) in the alpha rhythm compared to the ADHD group. These findings offering new possibilities for more techniques and diagnostic methods in finding more ADHD features. The differences in alpha and beta frequencies were more pronounced in the ADHD group during the CPT task compared to the CATA task. Additionally, the disparities in brain activity were more evident across delta, theta, alpha and beta frequency domains when the task given was a CATA as opposed to a CPT. The findings presented the underlying mechanisms of the FC differences between children and adolescents with ADHD. Moreover, these findings should extend to use machine learning approaches to assist the ADHD classification and diagnosis.