Coherence In Children Research Articles

Motor control differs for increasing and decreasing force production during ankle Isometric exercises in children

BackgroundPerformance of the central nervous system (CNS) in increased and decreasing muscle force around the ankle joint is essential for upright tasks of daily living. Previous studies have shown altered CNS control when they decrease force compared with when they increase force in young and older adults. But whether such alteration exists during childhood with incomplete maturation of CNS systems remain unclear. Therefore, this study aimed to evaluate the disparities in intramuscular EMG-EMG coherence, which serve as indicators of corticospinal drive to muscles during ankle isometric increasing and decreasing force generation in children.MethodsWe measured intramuscular EMG-EMG coherence activity of the tibialis anterior (TA) and the associated ability to perform isometric efforts at the ankle in 12 typically developing children (mean ± SD age = 5.91±1.37 years) and 12 healthy young adults (mean ± SD age = 23.16±1.52 years). The participants maintained isometric contractions at 20% of their maximal voluntary contractions (MVC) during ankle dorsiflexion to match a triangle trajectory for 7 s, including ramping up in 3.5 s (increasing force phase) and then linearly ramping down to rest in 3.5 s (decreasing force phase). The variability of force control was characterized by the coefficient of variance (CoV) of force output. Intramuscular EMG-EMG coherence from TA in two frequency bands, the beta band (15–30 Hz) and gamma band (30–45) that could reflect the corticospinal drive, were calculated for the comparison. A repeated measures ANOVA with the within-subjects factor of force generation phase (increasing force vs. decreasing force)x between-subjects factor of the group (children and young adults) was used for statistical analysis.ResultsRegarding the within-subjects difference, our results exhibited significantly higher CoV of force (p < 0.01) and lower EMG-EMG coherence of TA when they decrease force compared with when they increase force in both children and young adult groups. Regarding the between-subjects difference, the CoV of force was significantly higher (p < 0.01) in children compared to young adults, while the EMG-EMG coherence in children showed a significantly lower (p < 0.01) coherence compared with young adults. Furthermore, the EMG-EMG coherence measures were negatively correlated with the CoV of force.ConclusionsThe findings suggest that the age-related development would increase the corticospinal drive to TA muscle to deal with ankle isometric dorsiflexion during childhood, which could be also modulated with the force production phases, including increasing and decreasing force.

Attentional modulation of neural sound tracking in children with and without dyslexia.

Auditory selective attention forms an important foundation of children's learning by enabling the prioritisation and encoding of relevant stimuli. It may also influence reading development, which relies on metalinguistic skills including the awareness of the sound structure of spoken language. Reports of attentional impairments and speech perception difficulties in noisy environments in dyslexic readers are also suggestive of the putative contribution of auditory attention to reading development. To date, it is unclear whether non-speech selective attention and its underlying neural mechanisms are impaired in children with dyslexia and to which extent these deficits relate to individual reading and speech perception abilities in suboptimal listening conditions. In this EEG study, we assessed non-speech sustained auditory selective attention in 106 7-to-12-year-old children with and without dyslexia. Children attended to one of two tone streams, detecting occasional sequence repeats in the attended stream, and performed a speech-in-speech perception task. Results show that when children directed their attention to one stream, inter-trial-phase-coherence at the attended rate increased in fronto-central sites; this, in turn, was associated with better target detection. Behavioural and neural indices of attention did not systematically differ as a function of dyslexia diagnosis. However, behavioural indices of attention did explain individual differences in reading fluency and speech-in-speech perception abilities: both these skills were impaired in dyslexic readers. Taken together, our results show that children with dyslexia do not show group-level auditory attention deficits but these deficits may represent a risk for developing reading impairments and problems with speech perception in complex acoustic environments. RESEARCH HIGHLIGHTS: Non-speech sustained auditory selective attention modulates EEG phase coherence in children with/without dyslexia Children with dyslexia show difficulties in speech-in-speech perception Attention relates to dyslexic readers' speech-in-speech perception and reading skills Dyslexia diagnosis is not linked to behavioural/EEG indices of auditory attention.

The effect of language on the coherence of children’s conceptions of force

ABSTRACT Background The coherence of learners’ pre-instruction conceptions has been debated for some time. Studies on conceptions of force, specifically, have produced very different results in different contexts around the world. In this study, an integrative theoretical framework linking semantic differences across languages to concept learning in childhood is proposed, motivating the hypothesis that language is a population variable that impacts the coherence of young learners’ conceptions of force. Method This study uses the same structured interview developed in a previous study by Ioannides and Vosniadoue but in a new context—the Kingdom of Saudi Arabia—with three groups of elementary school children (7–12 years of age; n = 185): monolingual in Arabic; monolingual in English; and bilingual in Arabic and English. Findings The results support the hypothesis that language impacts the coherence of children’s conceptions of force with Arabic monolinguals exhibiting greater coherence than English monolinguals, and bilingual children exhibiting intermediate coherence. Contribution This paper provides evidence for the effect of semantic differences across languages and the phenomenon of lexical polysemy on the coherence of children’s initial conceptions of force. The relationship between the integrative theoretical framework proposed and other theories of conceptual change and its novel pedagogical implications are discussed.

Corticomuscular Coherence in Children with Unilateral Cerebral Palsy: A Feasibility and Preliminary Protocol Study.

Objective This study assessed the feasibility of corticomuscular coherence measurement during a goal-directed task in children with unilateral cerebral palsy while establishing optimal experimental parameters. Methods Participants (Manual Ability Classification System levels I-III) completed a submaximal isometric goal-directed grip task during simultaneous electroencephalography and electromyography (EMG) acquisition. Results All participants (n = 11, 6 females, mean age 11.3 ±2.4 years) completed corticomuscular coherence procedures. Of the 40 trials obtained per extremity, an average of 29 (n = 9) and 27 (n = 10) trials were retained from the more- and less-affected extremities, respectively. Obtaining measurement stability required an average of 28 trials per extremity. Conclusion Findings from this work support the feasibility of corticomuscular coherence measurement in children with unilateral cerebral palsy. Acquiring 28 to 40 corticomuscular coherence trials per extremity is ideal. The experimental parameters established in this work will inform future corticomuscular coherence application in pediatric unilateral cerebral palsy.

Age-Related Differences in the Expression of Causal Relationships During Narrative Production of Croatian Children

A successful narration relies on the ability of an individual to express a coherent sequence of temporally and causally related events organised around a specific theme, and this skill typically develops in early preschool age. Narrative coherence can be assessed by sequences or elements of story grammar. According to the causal network model, story grammar is viewed as an interconnected network of causal relationships, including enabling, physical, motivational, and psychological relationships. The importance of causal coherence has been recognised in many studies dealing with narrative discourse from the developmentalperspective. However, previous studies have reported inconsistent results with respect to the use of different types of causal relationships in the narratives of children of different ages. In the present study, we aimed to examine the differences between preschool and school children in their ability to express causal relationships, both overall and specific, in the narratives that they produce. Participants were monolingual Croatian-speaking children with typical language development, who were stratified into two groups: preschool (n = 41, mean age = 6;3 years) and school children (n = 50, mean age = 8;4 years). Narratives were collected using the Multilingual Assessment Instrument for Narratives (MAIN), which was adapted to Croatian. The results show significant differences between the two groups of children in the overall proportion of causal relationships expressed, as well as specifically in the proportion of motivational relationships. There were no significant differences between the groups in production of enabling, physical, or psychological relationships. School children expressed more causal relationships overall than preschool children, as well as specifically more motivational relationships. As far as we know, this study is the first to investigate causality in the narratives of monolingual Croatian-speaking children using the causal network model. Our results only partially confirm the findings of previous studies, suggesting the need for further research to better understand the development of causal coherence in children’s narrative discourse.

EEG Coherence in Children with Attention-Deficit/Hyperactivity Disorder and Autistic Features

Until the advent of the DSM-5, the diagnostic systems excluded diagnosis of Attention-Deficit/Hyperactivity Disorder (AD/HD) and Autism in the same child. However, much debate exists surrounding the validity of this exclusion, with a number of studies identifying individuals who meet the diagnostic criteria for both disorders. The aim of this study was to investigate Electroencephalogram (EEG) coherence differences between two groups of children with AD/HD, where one group exhibited a high level of autistic features (AD/HD+), and the other was low on autistic features (AD/HD-). EEG coherence is a measure of structural or functional connectivity between different cortical regions of the brain. 180 age and sex matched participants, between the ages of 8 and 13 years, were allocated to the AD/HD+ group, an AD/HD- group, or a control group. EEGs were recorded using an eyes-closed resting condition and Fourier transformed to provide coherence estimates in the delta, theta, alpha, and beta bands. The AD/HD- group had significantly elevated theta and beta coherences at short-medium inter-electrode distances intrahemispherically, and across all regions interhemispherically, in comparison to control subjects. Frontal and central/parietal/occipital delta interhemispheric coherences were also reduced. Conversely, in comparison to the AD/HD- group, children in the AD/HD+ group had significantly lower beta coherence at long-inter-electrode distances intrahemispherically, and across all regions interhemispherically. The current results suggest the existence of two independent disorders, distinguishable by their differing beta coherences.

Energy Drink Consumption, Depression, and Salutogenic Sense of Coherence Among Adolescents and Young Adults.

The prevalence of energy drink consumption has increased in Hungary over the past 10–15 years. This study assesses the frequency, motivations, and adverse effects of energy drink consumption, and examines how the process of becoming a regular consumer is connected with sense of coherence and depression symptoms. A total of 631 high school and college students were assessed using the Depression Scale (BDS-13) and Sense of Coherence Scale (SOC-13). Logistic regression models were fit to test the effect of and links between factors influencing addiction to energy drink use. A total of 31.1% (95% CI: 27.4–34.7) of those surveyed consumed energy drinks, 24.0% of those affected consumed the energy drink with alcohol, 71.4% (95% CI: 64.7–77.3) experienced adverse effects following energy drink consumption, and 10.2% (95% CI: 6.7–15.2) experienced at least four symptoms simultaneously. The most common motivations of consumption were fatigue, taste, and fun. Obtained by multivariate logistic regression models, after adjustment for sex and age, SOC and tendency to depression had a significant influence on the respondents’ odds of addiction. The tendency to depression increases the chances of addiction, while a strong sense of coherence diminishes the effects of depression. Young people in Hungary have been shown to consume energy drinks in quantities that are detrimental to their health. Complex preventive measures and programs are needed to address the problem. Families and educators should strive to instill a strong sense of coherence in children from an early age.

Self-Perceived Health Status and Sense of Coherence in Children With Type 1 Diabetes in the West Bank, Palestine

Introduction: Self-perceived health status and sense of coherence (SOC) are essential constructs for capturing health outcomes in children with type 1 diabetes (T1D). This study measured self-perceived health status and SOC in children with T1D and compared them with a healthy reference group in West Bank, Palestine. Methodology: One hundred children with T1D aged 8 to 18 years and 300 healthy children completed PedsQL 4.0 Generic Core Scales and SOC-13 in a cross-sectional descriptive study. Results: All children reported acceptable self-perceived health status and low degree of SOC. In the diabetes group, high degree of SOC was associated with better self-perceived health status and more optimal metabolic control. Males in the diabetes group reported higher self-perceived health status than females. Discussion: The unstable political situation in Palestine may threaten SOC in children in general. Health professionals can monitor self-perceived health status and SOC to evaluate interventions aiming to improve glycemic control.

The mental representation of attachment and narrative coherence in children with and without externalizing disorders

ABSTRACT Externalizing behaviours are among the most prevalent reasons for a child referral to counselling centres. It has been documented that narrative coherence and mental representation of attachment to the caregivers, especially the mother, is the reason behind many problems in childhood. This study investigates and compares the mental representation of attachment and narrative coherence in children with and without externalizing disorders. The research method used in this study was a causal-comparative. After the primary screening of the participants, who were selected through convenience sampling, children were divided into two groups of with (N = 24) or without (N = 20) externalizing disorders. After administering the CBCL, children were assessed using the MacArthur Story Stem Battery. After test analysis, the result indicated that children in externalizing behaviour group scored statistically higher in negative mental representation, which scores lower in positive mental representation, as well as narrative coherence.

Oral narrative structure and coherence of children with attention deficit hyperactivity disorder.

This study aimed to characterize and compare the use of typical story grammar elements and global coherence level in the oral narrative of children with Attention Deficit Hyperactivity Disorder with the narrative of children without the disorder and with typical development. A total of 40 children of both sexes aged 5 to 10 years who attended elementary school participated in the study, 20 of whom were diagnosed with Attention Deficit Hyperactivity Disorder (ADHD Group), and 20 with typical development (TD Group). Participants from each group were similar in sex, chronological age, schooling and socioeconomic status. The wordless picture book Frog, Where Are You? was used to elicit the oral narrative analyzed for the presence of the main typical elements of the story schema (character, theme/topic, event/plot and outcome), and afterwards their narration was classified according to four different levels of organization corresponding to the global story coherence level. The ADHD Group presented lower scores on the structural elements "theme/ topic" and "outcome" and a narrative with lower degree of coherence compared to the TD Group. The children with ADHD included in this study presented difficulties to use typical story grammar elements, mainly related to the maintenance of the central theme and outcome of the story. These elements are considered fundamental for construction of narrative coherence, which justifies the lower levels of global coherence found in the oral narrative of the ADHD Group.

Children’s Thinking about HIV/AIDS Causality, Prevention, and Social Interaction

Guided by both a Piagetian and a naive theories perspective on disease concepts, this study examined children’s thinking about HIV/AIDS, with special attention to its development, coherence, and sociocultural correlates. It examined age differences among Mexican-American and Euro-American children aged 8 to 13 (N = 158) in both Piagetian level of causal understanding (independent of correctness) and the causal knowledge central to an intuitive theory of AIDS (knowledge of risk behaviors and of the viral disease agent). It explored theoretical coherence in terms of implications of causal understanding and causal knowledge for knowledge of how to prevent AIDS and willingness to interact with people who have it. As predicted, scores on all measures increased significantly with age, and causal knowledge of risk factors exceeded knowledge of corresponding prevention rules. In multiple regression analyses, causal knowledge of both risk factors and the viral disease agent predicted knowledge of prevention and willingness to interact, even with age and other measures controlled. Prevention knowledge predicted willingness to interact even better, whereas the Piagetian measure of casual understanding did not predict either prevention knowledge or willingness to interact. Ethnic group differences were not evident but parent education was related to greater viral knowledge and willingness to interact. The results suggest a good deal of coherence in children’s thinking about this disease while also suggesting the desirability of making explicit the implications of critical causal information about an unfamiliar disease for preventing the disease without stigmatizing those who have it.

Hemodynamic coherence in critically ill pediatric patients.

Differences in physiology and pathophysiology make the treatment of developing, critically ill children particularly challenging as compared to that of adults. Significant differences in the cardiovascular system of neonates and children in size, weight, body proportions, and metabolism should be considered. Hemodynamic monitoring is crucial for early warning of pending deterioration and to guide therapy. Current monitoring is limited to the macrocirculation, but an adequately functioning macrocirculation does not guarantee a well-functioning microcirculation. Research in children revealed loss of hemodynamic coherence, i.e., microcirculatory alterations despite normal systemic hemodynamics. Implementing the framework of hemodynamic coherence in microcirculatory monitoring in children can aid physicians in titrating therapy on both macrocirculatory and microcirculatory effects to assure optimal oxygen delivery. Monitoring the microcirculation at the bedside requires further technical development. Although more research is necessary to validate the concept of hemodynamic coherence in children, the possibilities of applying this concept in children seem promising.

Psychophysiological mechanisms of major and minor chords perception

This study investigated differences in the EEG power and coherence of children with Asperger’s Syndrome.Twenty boys with Asperger’s Syndrome, aged 7–12 years, and an age and sex matched control group, participated in this study. The EEG was recorded during an eyes-closed resting condition from 19 electrode sites, which were clustered into nine regions prior to analysis. One minute of trace was analysed using Fourier transformations to obtain both absolute and relative power estimates in the delta, theta, alpha and beta frequency bands. Wave-shape coherence was calculated for 8 intrahemispheric and 8 interhemispheric electrode pairs.The Asperger’s group had a global increase in absolute delta and an anterior increase in relative delta. Both absolute and relative theta were globally increased and relative alpha was globally decreased. Subjects with Asperger’s Syndrome exhibited a broad pattern of reduced hemispheric asymmetry in intrahemispheric coherence. Reduced anterior interhemispheric coherence in the alpha and beta bands was also found in the Asperger’s Syndrome group.These results suggest the existence of frontal lobe abnormalities in children with Asperger’s Syndrome, and possible abnormalities in normal CNS maturational processes.This is the first major study to investigate EEG power and coherence anomalies in children with Asperger’s Syndrome.

Coherence in children with AD/HD and excess alpha power in their EEG.

This study investigated differences in EEG coherence measures between two groups of children with Attention-Deficit/Hyperactivity Disorder (AD/HD) - one with the more common EEG profile (increased theta), and a group with excess alpha activity as the dominant EEG abnormality. 26 children (aged 9-13years) with AD/HD were included in each of the excess-theta and excess-alpha groups, and were age- and sex-matched with 26 control subjects. EEG was recorded from 19 electrode sites during an eyes-closed resting condition. Wave-shape coherence was calculated for eight intrahemispheric and eight interhemispheric electrode pairs, for the delta, theta, alpha and beta bands. In comparison with the controls, the excess-theta AD/HD group had increased theta intrahemispheric coherences at short-medium inter-electrode distances. Frontally, the excess-theta AD/HD group had increased interhemispheric theta and reduced beta coherences. The excess-alpha group primarily showed increased slow wave (delta and theta) intrahemispheric coherence at short-medium inter-electrode distances, and reduced alpha coherence at longer inter-electrode distances, compared with controls. An increase in frontal interhemispheric theta coherence was also found. These results suggest that AD/HD children with excess alpha power have an underlying connectivity dysfunction in the frontal lobes, which is found in common with other subjects with the excess-theta EEG profile. However, a number of qualitative differences exist that could be associated with other aspects of the AD/HD diagnosis. The excess-alpha group appeared to have fewer frontal-lobe abnormalities than the excess-theta AD/HD group. This is the first study to investigate coherence in AD/HD children who have the atypical profile of increased alpha power in their EEG.

Age-specific characteristics of EEG coherence in children and adolescents living in the European North of Russia

The article, based on the investigations carried out in 91 school students aged 7–18 years who were exposed to severe weather conditions as residents of the European North of Russia, analyzes the processes underlying the development of structures for providing the spatial synchronization of cerebral bioelectric potentials. The coherence values were evaluated for 19 channels (171 pairs of leads) in five basic EEG frequency bands (Δ, θ, α1, α2, and β). The article describes the age-related dynamics, gender-specific features, and topical specificity in the development of coherent connections in the left and right cerebral hemispheres, as well as in the formation of interhemispheric and interregional connections. We used a computerized evaluation technique for distinguishing between three school age groups of northerners using the frequency structure of EEG coherence with the purpose of elaborating some criteria for diagnosing school students with a developmental delay in the formation of spatial organization for the interaction of local EEG processes. The recorded age-related changes in the EEG-pattern structure reflect the pattern of morphofunctional brain development in children and adolescents exposed to the severe conditions of the North at different stages of their postnatal ontogenesis.

EEG activity in children with Asperger’s Syndrome

ObjectiveThis study investigated differences in the EEG power and coherence of children with Asperger’s Syndrome. MethodTwenty boys with Asperger’s Syndrome, aged 7–12years, and an age and sex matched control group, participated in this study. The EEG was recorded during an eyes-closed resting condition from 19 electrode sites, which were clustered into nine regions prior to analysis. One minute of trace was analysed using Fourier transformations to obtain both absolute and relative power estimates in the delta, theta, alpha and beta frequency bands. Wave-shape coherence was calculated for 8 intrahemispheric and 8 interhemispheric electrode pairs. ResultsThe Asperger’s group had a global increase in absolute delta and an anterior increase in relative delta. Both absolute and relative theta were globally increased and relative alpha was globally decreased. Subjects with Asperger’s Syndrome exhibited a broad pattern of reduced hemispheric asymmetry in intrahemispheric coherence. Reduced anterior interhemispheric coherence in the alpha and beta bands was also found in the Asperger’s Syndrome group. ConclusionsThese results suggest the existence of frontal lobe abnormalities in children with Asperger’s Syndrome, and possible abnormalities in normal CNS maturational processes. SignificanceThis is the first major study to investigate EEG power and coherence anomalies in children with Asperger’s Syndrome.

Category coherence in children's inductive inferences with cross-classified entities

Items rarely belong to a single category, but rather can be cross-classified into many categories, each serving a very different basis for induction. Presently, little is known about how children determine which category to use for induction in cross-classification situations. This research examined the role of category coherence in children's and adults’ (N=329) inductive reasoning about cross-classified entities. In Study 1 and 2, participants were presented with a person who could be cross-classified into two categories, one coherent and the other incoherent. Category coherence is the extent to which members of a category and/or the properties of a category make sense together, given one's background knowledge. The results showed that by age 5 years, children are systematic in their use of coherence, tending to select the coherent category to inform their inference about the person. There is weaker evidence for 4-year-olds. Study 3 and 4 revealed that 4-year-olds have an appreciation for coherence in tasks of categorization. The results of Study 5 demonstrated 5-year-olds’ and adults’ tendency to use coherence when reasoning about cross-classified entities across different induction tasks. Overall, these results contribute to our emerging understanding of how and why children select some categories versus others during induction with cross-classified items.

Maternal stress and internalizing symptoms in preschoolers: the moderating role of narrative coherence.

In the present study, we examined whether maternal psychosocial stress and children's coherence in story-stem narratives are associated with preschool children's internalizing symptoms and disorders, and whether narrative coherence moderates the association between maternal stress and children's internalizing symptoms and disorders. The sample consists of 236 preschool children (129 girls, 107 boys; Mage = 5.15 years) and their mothers. Mothers completed questionnaires on their psychosocial stress burden and on child symptoms. A diagnostic interview (the Preschool Age Psychiatric Assessment; Egger & Angold, 2004) was conducted with one of the parents to assess children's psychiatric diagnoses. Children completed 8 story stems of the MacArthur Story Stem Battery (Bretherton & Oppenheim, 2003). Story-stem narratives were coded for narrative coherence. Multivariate analyses were controlled for children's age, gender, verbal performance, and externalizing symptoms. Results showed that maternal psychosocial stress was significantly associated with child internalizing symptoms and disorders. Neither maternal stress nor children's internalizing symptoms or disorders were associated with narrative coherence. However, narrative coherence moderated the association between maternal stress and child internalizing symptoms. For children with more incoherent narratives, the association between maternal psychosocial stress and children's internalizing symptoms was significantly stronger than for children with more coherent narratives. The moderation effect of narrative coherence concerning children's internalizing disorders was found not to be significant. Our findings indicate that preschool children's cognitive-emotional organization in dealing with relational conflict themes seems to buffer their mental health when exposed to adverse circumstances in their everyday family life.

Electroencephalogram Coherence in Children With and Without Autism Spectrum Disorders: Decreased Interhemispheric Connectivity in Autism

Electroencephalogram coherence was measured in children with autism spectrum disorders (ASD) and control children at baseline and while watching videos of a familiar and unfamiliar person reading a story. Coherence was measured between the left and right hemispheres of the frontal, parietal, and temporal-parietal lobes (interhemispheric) and between the frontal and parietal lobes in each hemisphere (intrahemispheric). A data-reduction technique was employed to identify the frequency (alpha) that yielded significant differences in video conditions. Children with ASD displayed reduced coherence at the alpha frequency between the left and right temporal-parietal lobes in all conditions and reduced coherence at the alpha frequency between left and right frontal lobes during baseline. No group differences in intrahemispheric coherence at the alpha frequency emerged at the chosen statistical threshold. Results suggest decreased interhemispheric connectivity in frontal and temporal-parietal regions in children with ASD compared to controls.

EEG coherence and symptom profiles of children with Attention-Deficit/Hyperactivity Disorder

Objective We compared EEG coherence in children with and without AD/HD, and sought to relate observed anomalies to AD/HD symptoms. Methods Forty children with AD/HD and 40 age- and sex-matched controls had eyes-closed resting EEG coherence calculated for eight interhemispheric electrode pairs and eight intrahemispheric pairs (four within each hemisphere) in the delta, theta, alpha, beta and “40 Hz” gamma bands. Results At short-medium inter-electrode distances, the AD/HD group had increased intrahemispheric coherence in delta and theta, and reduced (L > R) laterality in delta, alpha, beta and gamma. Over longer inter-electrode distances, the AD/HD group had reduced intrahemispheric coherence in alpha. In interhemispheric comparisons, the AD/HD group had reduced frontal coherence in delta, alpha and gamma, increased temporal theta and reduced temporal alpha coherences, and increased central/parietal/occipital coherence in theta. Smaller left-lateralized coherences in AD/HD correlated negatively with DSM Inattentive and DSM Total scores, and smaller frontal interhemispheric coherence in alpha correlated negatively with DSM Hyperactive/Impulsive score. Conclusions The negative correlations between AD/HD coherence anomalies and symptoms suggest that several anomalies reflect compensatory brain function. Significance Coherence differences in AD/HD may reflect anomalous frontal right-hemisphere linkages that help compensate functional brain anomalies in the left frontal regions in this disorder.