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https://www.readbyqxmd.com/read/27910247/auditory-processing-in-noise-is-associated-with-complex-patterns-of-disrupted-functional-connectivity-in-autism-spectrum-disorder
#1
Fahimeh Mamashli, Sheraz Khan, Hari Bharadwaj, Konstantinos Michmizos, Santosh Ganesan, Keri-Lee A Garel, Javeria Ali Hashmi, Martha R Herbert, Matti Hämäläinen, Tal Kenet
Autism spectrum disorder (ASD) is associated with difficulty in processing speech in a noisy background, but the neural mechanisms that underlie this deficit have not been mapped. To address this question, we used magnetoencephalography to compare the cortical responses between ASD and typically developing (TD) individuals to a passive mismatch paradigm. We repeated the paradigm twice, once in a quiet background, and once in the presence of background noise. We focused on both the evoked mismatch field (MMF) response in temporal and frontal cortical locations, and functional connectivity with spectral specificity between those locations...
December 2, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27909005/repetition-suppression-and-memory-for-faces-is-reduced-in-adults-with-autism-spectrum-conditions
#2
Michael P Ewbank, Philip J Pell, Thomas E Powell, Elisabeth A H von dem Hagen, Simon Baron-Cohen, Andrew J Calder
Autism spectrum conditions (ASC) are associated with a number of atypicalities in face processing, including difficulties in face memory. However, the neural mechanisms underlying this difficulty are unclear. In neurotypical individuals, repeated presentation of the same face is associated with a reduction in activity, known as repetition suppression (RS), in the fusiform face area (FFA). However, to date, no studies have investigated RS to faces in individuals with ASC, or the relationship between RS and face memory...
November 30, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27906524/the-development-of-autism-spectrum-disorders-variability-and-causal-complexity
#3
REVIEW
Robert H Wozniak, Nina B Leezenbaum, Jessie B Northrup, Kelsey L West, Jana M Iverson
The autism spectrum is highly variable, both behaviorally and neurodevelopmentally. Broadly speaking, four related factors contribute to this variability: (1) genetic processes, (2) environmental events, (3) gene × environment interactions, and (4) developmental factors. Given the complexity of the relevant processes, it appears unlikely that autism spectrum atypicalities can be attributed to any one causal mechanism. Rather, the development of neural atypicality reflects an interaction of genetic and environmental risk factors...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27899901/association-of-aryl-hydrocarbon-receptor-related-gene-variants-with-the-severity-of-autism-spectrum-disorders
#4
Takashi X Fujisawa, Shota Nishitani, Ryoichiro Iwanaga, Junko Matsuzaki, Chisato Kawasaki, Mamoru Tochigi, Tsukasa Sasaki, Nobumasa Kato, Kazuyuki Shinohara
Exposure to environmental chemicals, such as dioxin, is known to have adverse effects on the homeostasis of gonadal steroids, thereby potentially altering the sexual differentiation of the brain to express autistic traits. Dioxin-like chemicals act on the aryl hydrocarbon receptor (AhR), polymorphisms, and mutations of AhR-related gene may exert pathological influences on sexual differentiation of the brain, causing autistic traits. To ascertain the relationship between AhR-related gene polymorphisms and autism susceptibility, we identified genotypes of them in patients and controls and determined whether there are different gene and genotype distributions between both groups...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27899714/parental-sleep-quality-and-behavior-problems-of-children-with-autism
#5
Iulia Mihaila, Sigan L Hartley
This study explored the impact of parental sleep quality on the experience of behavior problems by children with autism spectrum disorder. A 14-day daily diary was used in a sample of 176 mother-father couples. Dyadic multilevel models were conducted to examine the between-person and within-person effects of previous-night sleep quality on parents' rating of level of behavior problems by the child with autism spectrum disorder and level of positive and negative affect. Results indicated that persistently poor sleep quality was associated with between-person differences in initial rating of level of behavior problems by the child with autism spectrum disorder for mothers...
November 29, 2016: Autism: the International Journal of Research and Practice
https://www.readbyqxmd.com/read/27899712/disparity-in-report-of-autism-related-behaviors-by-social-demographic-characteristics-findings-from-a-community-based-study-in-taiwan
#6
Peng-Chou Tsai, Rebecca A Harrington, For-Wey Lung, Li-Ching Lee
The Social Communication Questionnaire is one of the most commonly used screening tools for autism spectrum disorder. The Social Communication Questionnaire is a caregiver-reported questionnaire with 40 items based on questions from the Autism Diagnostic Interview-Revised. This study collected Social Communication Questionnaire data from a community-based, multi-stage case identification design epidemiologic study in one socioeconomically disadvantaged county in Taiwan. The Social Communication Questionnaire was distributed to 3034 school children, aged 6-8 years...
November 29, 2016: Autism: the International Journal of Research and Practice
https://www.readbyqxmd.com/read/27899711/figurative-language-comprehension-in-individuals-with-autism-spectrum-disorder-a-meta-analytic-review
#7
REVIEW
Tamar Kalandadze, Courtenay Norbury, Terje Nærland, Kari-Anne B Næss
We present a meta-analysis of studies that compare figurative language comprehension in individuals with autism spectrum disorder and in typically developing controls who were matched based on chronological age or/and language ability. A total of 41 studies and 45 independent effect sizes were included based on predetermined inclusion criteria. Group matching strategy, age, types of figurative language, and cross-linguistic differences were examined as predictors that might explain heterogeneity in effect sizes...
November 29, 2016: Autism: the International Journal of Research and Practice
https://www.readbyqxmd.com/read/27899709/the-art-of-camouflage-gender-differences-in-the-social-behaviors-of-girls-and-boys-with-autism-spectrum-disorder
#8
Michelle Dean, Robin Harwood, Connie Kasari
This study examined the extent to which gender-related social behaviors help girls with autism spectrum disorder to seemingly mask their symptoms. Using concurrent mixed methods, we examined the social behaviors of 96 elementary school children during recess (autism spectrum disorder = 24 girls and 24 boys, typically developing = 24 girls and 24 boys). Children with autism spectrum disorder had average intelligence (IQ ⩾ 70), a confirmed diagnosis, and were educated in the general education classroom...
November 29, 2016: Autism: the International Journal of Research and Practice
https://www.readbyqxmd.com/read/27898583/genetic-control-of-postnatal-human-brain-growth
#9
Laura I van Dyck, Eric M Morrow
PURPOSE OF REVIEW: Studies investigating postnatal brain growth disorders inform the biology underlying the development of human brain circuitry. This research is becoming increasingly important for the diagnosis and treatment of childhood neurodevelopmental disorders, including autism and related disorders. Here, we review recent research on typical and abnormal postnatal brain growth and examine potential biological mechanisms. RECENT FINDINGS: Clinically, brain growth disorders are heralded by diverging head size for a given age and sex, but are more precisely characterized by brain imaging, post-mortem analysis, and animal model studies...
November 24, 2016: Current Opinion in Neurology
https://www.readbyqxmd.com/read/27895883/alexithymia-but-not-autism-spectrum-disorder-may-be-related-to-the-production-of-emotional-facial-expressions
#10
Dominic A Trevisan, Marleis Bowering, Elina Birmingham
BACKGROUND: A prominent diagnostic criterion of autism spectrum disorder (ASD) relates to the abnormal or diminished use of facial expressions. Yet little is known about the mechanisms that contribute to this feature of ASD. METHODS: We showed children with and without ASD emotionally charged video clips in order to parse out individual differences in spontaneous production of facial expressions using automated facial expression analysis software. RESULTS: Using hierarchical multiple regression, we sought to determine whether alexithymia (characterized by difficulties interpreting one's own feeling states) contributes to diminished facial expression production...
2016: Molecular Autism
https://www.readbyqxmd.com/read/27895322/gestational-vitamin-d-deficiency-and-autism-related-traits-the-generation-r-study
#11
A A E Vinkhuyzen, D W Eyles, T H J Burne, L M E Blanken, C J Kruithof, F Verhulst, V W Jaddoe, H Tiemeier, J J McGrath
There is intense interest in identifying modifiable risk factors associated with autism-spectrum disorders (ASD). Autism-related traits, which can be assessed in a continuous fashion, share risk factors with ASD, and thus can serve as informative phenotypes in population-based cohort studies. Based on the growing body of research linking gestational vitamin D deficiency with altered brain development, this common exposure is a candidate modifiable risk factor for ASD and autism-related traits. The association between gestational vitamin D deficiency and a continuous measure of autism-related traits at ~6 years (Social Responsiveness Scale; SRS) was determined in a large population-based cohort of mothers and their children (n=4229)...
November 29, 2016: Molecular Psychiatry
https://www.readbyqxmd.com/read/27894273/prevalence-of-non-febrile-seizures-in-children-with-idiopathic-autism-spectrum-disorder-and-their-unaffected-siblings-a-retrospective-cohort-study
#12
Lena M McCue, Louise H Flick, Kimberly A Twyman, Hong Xian, Thomas E Conturo
BACKGROUND: Autism spectrum disorder (ASD) is a heterogeneous disorder characterized not only by deficits in communication and social interactions but also a high rate of co-occurring disorders, including metabolic abnormalities, gastrointestinal and sleep disorders, and seizures. Seizures, when present, interfere with cognitive development and are associated with a higher mortality rate in the ASD population. METHODS: To determine the relative prevalence of non-febrile seizures in children with idiopathic ASD from multiplex and simplex families compared with the unaffected siblings in a cohort of 610 children with idiopathic ASD and their 160 unaffected siblings, participating in the Autism Genetic Resource Exchange project, the secondary analysis was performed comparing the life-time prevalence of non-febrile seizures...
November 28, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27894237/new-insight-in-improving-therapeutic-efficacy-of-antipsychotic-agents-an-overview-of-improved-in-vitro-and-in-vivo-performance-efficacy-upgradation-and-future-prospects
#13
Zahid Hussain, Hnin Ei Thu, Ahmad Nazrun Shuid
Psychotic disorders are severe mental disorders that rigorously affect patient personality, critical thinking, and perceptional ability. High prevalence, global dissemination and limitations of conventional pharmacological approaches compel a significant burden to the patient, medical professionals and the healthcare system. To date, numerous orally administered therapies are available for the management of depressive disorders, schizophrenia, anxiety, bipolar disorders and autism spectrum problems. However, poor water solubility, erratic oral absorption, extensive first-pass metabolism, low oral bioavailability and short half-lives are major factors which limit the pharmaceutical significance and therapeutic feasibility of these agents...
November 25, 2016: Current Drug Targets
https://www.readbyqxmd.com/read/27893730/fluorescent-nanodiamond-tracking-reveals-intraneuronal-transport-abnormalities-induced-by-brain-disease-related-genetic-risk-factors
#14
Simon Haziza, Nitin Mohan, Yann Loe-Mie, Aude-Marie Lepagnol-Bestel, Sophie Massou, Marie-Pierre Adam, Xuan Loc Le, Julia Viard, Christine Plancon, Rachel Daudin, Pascale Koebel, Emilie Dorard, Christiane Rose, Feng-Jen Hsieh, Chih-Che Wu, Brigitte Potier, Yann Herault, Carlo Sala, Aiden Corvin, Bernadette Allinquant, Huan-Cheng Chang, François Treussart, Michel Simonneau
Brain diseases such as autism and Alzheimer's disease (each inflicting >1% of the world population) involve a large network of genes displaying subtle changes in their expression. Abnormalities in intraneuronal transport have been linked to genetic risk factors found in patients, suggesting the relevance of measuring this key biological process. However, current techniques are not sensitive enough to detect minor abnormalities. Here we report a sensitive method to measure the changes in intraneuronal transport induced by brain-disease-related genetic risk factors using fluorescent nanodiamonds (FNDs)...
November 28, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27893232/narrative-production-in-children-with-autism-spectrum-disorder-asd-and-children-with-attention-deficit-hyperactivity-disorder-adhd-similarities-and-differences
#15
Sanne J M Kuijper, Catharina A Hartman, Suzanne T M Bogaerds-Hazenberg, Petra Hendriks
The present study focuses on the similarities and differences in language production between children with autism spectrum disorder (ASD) and children with attention-deficit/hyperactivity disorder (ADHD). In addition, we investigated whether Theory of Mind (ToM), working memory, and response inhibition are associated with language production. Narratives, produced by 106 Dutch-speaking children (36 with ASD, 34 with ADHD, and 36 typically developing) aged 6 to 12 during ADOS assessment, were examined on several linguistic measures: verbal productivity, speech fluency, syntactic complexity, lexical semantics, and discourse pragmatics...
November 28, 2016: Journal of Abnormal Psychology
https://www.readbyqxmd.com/read/27892236/1-in-100-babies-the-fetal-alcohol-spectrum-disorder-pathway
#16
Kerry Lyons
Alcohol consumed during pregnancy is the nation's leading preventable cause of developmental disabilities and birth defects. One in 100 babies is estimated to be born with alcohol-related damage, according to the World Health Organization. Fetal alcohol spectrum disorders (FASDs) are more common than autism but are under-diagnosed.
November 23, 2016: Nursing Standard
https://www.readbyqxmd.com/read/27891820/investigating-diagnostic-bias-in-autism-spectrum-conditions-an-item-response-theory-analysis-of-sex-bias-in-the-aq-10
#17
Aja Louise Murray, Carrie Allison, Paula L Smith, Simon Baron-Cohen, Tom Booth, Bonnie Auyeung
Diagnostic bias is a concern in autism spectrum conditions (ASC) where prevalence and presentation differ by sex. To ensure that females with ASC are not under-identified, it is important that ASC screening tools do not systematically underestimate autistic traits in females relative to males. We evaluated whether the AQ-10, a brief screen for ASC recommended by the National Institute of Clinical Excellence in cases of suspected ASC, exhibits such a bias. Using an item response theory approach, we evaluated differential item functioning and differential test functioning...
November 28, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27891819/autism-and-emotional-face-viewing
#18
Jakob Åsberg Johnels, Daniel Hovey, Nicole Zürcher, Loyse Hippolyte, Eric Lemonnier, Christopher Gillberg, Nouchine Hadjikhani
Atypical patterns of face-scanning in individuals with autism spectrum disorder (ASD) may contribute to difficulties in social interactions, but there is little agreement regarding what exactly characterizes face-viewing in ASD. In addition, little research has examined how face-viewing is modulated by the emotional expression of the stimuli, in individuals with or without ASD. We used eye-tracking to explore viewing patterns during perception of dynamic emotional facial expressions in relatively large groups of individuals with (n = 57) and without ASD (n = 58) and examined diagnostic- and age-related effects, after subgrouping children and adolescents (≤18 years), on the one hand, and adults (>18 years), on the other...
November 28, 2016: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/27891068/can-mouse-imaging-studies-bring-order-to-autism-connectivity-chaos
#19
Adam Liska, Alessandro Gozzi
Functional Magnetic Resonance Imaging (fMRI) has consistently highlighted impaired or aberrant functional connectivity across brain regions of autism spectrum disorder (ASD) patients. However, the manifestation and neural substrates of these alterations are highly heterogeneous and often conflicting. Moreover, their neurobiological underpinnings and etiopathological significance remain largely unknown. A deeper understanding of the complex pathophysiological cascade leading to aberrant connectivity in ASD can greatly benefit from the use of model organisms where individual pathophysiological or phenotypic components of ASD can be recreated and investigated via approaches that are either off limits or confounded by clinical heterogeneity...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27890788/genetic-testing-among-spanish-pediatric-neurologists-knowledge-attitudes-and-practices
#20
J Domínguez-Carral, F J López-Pisón, A Macaya, M Bueno Campaña, M A García-Pérez, D Natera-de Benito
Advances in genetic testing applied to child neurology have enabled the development of genetic tests with greater sensitivity in elucidating an etiologic diagnosis for common neurological conditions. The objective of the current study was to examine child neurologists' perspectives and insights into genetic testing. We surveyed 118 Spanish child neurologists, exploring their knowledge, attitudes, and practices concerning genetic tests. All of them had requested at least one genetic test in the past six months...
November 24, 2016: European Journal of Medical Genetics
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