1. David N, Rose M, Schneider TR, Vogeley K, Engel AK. {{Brief Report: Altered Horizontal Binding of Single Dots to Coherent Motion in Autism}}. {J Autism Dev Disord} (Apr 2)
Individuals with autism often show a fragmented way of perceiving their environment, suggesting a disorder of information integration, possibly due to disrupted communication between brain areas. We investigated thirteen individuals with high-functioning autism (HFA) and thirteen healthy controls using the metastable motion quartet, a stimulus consisting of two dots alternately presented at four locations of a hypothetical square, thereby inducing an apparent motion percept. This percept is vertical or horizontal, the latter requiring binding of motion signals across cerebral hemispheres. Decreasing the horizontal distance between dots could facilitate horizontal percepts. We found evidence for altered horizontal binding in HFA: Individuals with HFA needed stronger facilitation to experience horizontal motion. These data are interpreted in light of reduced cross-hemispheric communication.
2. Erturk O, Bilguvar K, Korkmaz B, Bayri Y, Bayrakli F, Arlier Z, Ozturk AK, Yalcinkaya C, Tuysuz B, State MW, Gunel M. {{A patient with Duchenne muscular dystrophy and autism demonstrates a hemizygous deletion affecting Dystrophin}}. {Am J Med Genet A} (Apr);152A(4):1039-1042.
3. Kalb LG, Law JK, Landa R, Law PA. {{Onset Patterns Prior to 36 Months in Autism Spectrum Disorders}}. {J Autism Dev Disord} (Apr 2)
The present study investigated differences among children with three different patterns of autism symptom onset: regression, plateau, and no loss and no plateau. Cross-sectional data were collected from parents of children aged 3-17 years with an autism spectrum disorder (n = 2,720) who were recruited through a US-based online research database. Parental report of developmental characteristics was assessed through a parent questionnaire, and current autism symptoms were measured via the Social Responsiveness Scale and Social Communication Questionnaire. Multivariate analyses indicated that children with regression had a distinct developmental pattern marked by less delayed early development. However, following regression, these children evinced elevated autism symptom scores and an increased risk for poorer outcomes when compared with the other onset groups.
4. Keen DV, Reid FD, Arnone D. {{Autism, ethnicity and maternal immigration}}. {Br J Psychiatry} (Apr);196:274-281.
BACKGROUND: A growing number of European studies, particularly from Nordic countries, suggest an increased frequency of autism in children of immigrant parents. In contrast, North American studies tend to conclude that neither maternal ethnicity nor immigrant status are related to the rate of autism-spectrum disorders. AIMS: To examine the hypotheses that maternal ethnicity and/or immigration are linked to the rate of childhood autism-spectrum disorders. METHOD: Retrospective case-note analysis of all 428 children diagnosed with autism-spectrum disorders presenting to the child development services in two centres during a 6-year period. RESULTS: Mothers born outside Europe had a significantly higher risk of having a child with an autism-spectrum disorder compared with those born in the UK, with the highest risk observed for the Caribbean group (relative risks (RRs) in the two centres: RR = 10.01, 95% CI 5.53-18.1 and RR = 8.89, 95% CI 5.08-15.5). Mothers of Black ethnicity had a significantly higher risk compared with White mothers (RR = 8.28, 95% CI 5.41-12.7 and RR = 3.84, 95% CI 2.93-5.02). Analysis of ethnicity and immigration factors together suggests the increased risk is predominately related to immigration. CONCLUSIONS: Maternal immigration is associated with substantial increased risk of autism-spectrum disorders with differential risk according to different region of birth and possibly ethnicity.
5. Pisula E, Kossakowska Z. {{Sense of Coherence and Coping with Stress Among Mothers and Fathers of Children with Autism}}. {J Autism Dev Disord} (Apr 2)
The purpose of the study was to compare the level of sense of coherence (SOC) in parents of children with autism and in parents of typically developing children, and to examine the association between SOC level and coping strategies. Two questionnaires were used: Sense of Coherence Scale (SOC-29) and Ways of Coping Questionnaire. Parents of children with autism had a lower level of the total SOC, meaningfulness, and manageability compared with controls, and used escape-avoidance coping more often. No differences in SOC level were found between mothers and fathers. In parents of children with autism the SOC level was positively associated with seeking social support and self-controlling, and negatively with accepting responsibility and positive reappraisal.
6. Silverman LB, Bennetto L, Campana E, Tanenhaus MK. {{Speech-and-gesture integration in high functioning autism}}. {Cognition} (Mar 29)
This study examined iconic gesture comprehension in autism, with the goal of assessing whether cross-modal processing difficulties impede speech-and-gesture integration. Participants were 19 adolescents with high functioning autism (HFA) and 20 typical controls matched on age, gender, verbal IQ, and socio-economic status (SES). Gesture comprehension was assessed via quantitative analyses of visual fixations during a video-based task, using the visual world paradigm. Participants’ eye movements were recorded while they watched videos of a person describing one of four shapes shown on a computer screen, using speech-and-gesture or speech-only descriptions. Participants clicked on the shape that the speaker described. Since gesture naturally precedes speech, earlier visual fixations to the target shape during speech-and-gesture compared to speech-only trials, would suggest immediate integration of auditory and visual information. Analyses of eye movements supported this pattern in control participants but not in individuals with autism: iconic gestures facilitated comprehension in typical individuals, while it hindered comprehension in those with autism. Cross-modal processing difficulties in autism were not accounted for by impaired unimodal speech or gesture processing. The results have important implications for the treatment of children and adults with this disorder.
7. Taylor JL, Seltzer MM. {{Changes in the Autism Behavioral Phenotype During the Transition to Adulthood}}. {J Autism Dev Disord} (Apr 2)
We examined whether exiting high school was associated with alterations in rates of change in autism symptoms and maladaptive behaviors. Participants were 242 youth with ASD who had recently exited the school system and were part of our larger longitudinal study; data were collected at five time points over nearly 10 years. Results indicated overall improvement of autism symptoms and internalized behaviors over the study period, but slowing rates of improvement after exit. Youth who did not have an intellectual disability evidenced the greatest slowing in improvement. Lower family income was associated with less improvement. Our findings suggest that adult day activities may not be as intellectually stimulating as educational activities in school, reflected by less phenotypic improvement after exit.
8. Zhang X, Lv CC, Tian J, Miao RJ, Xi W, Hertz-Picciotto I, Qi L. {{Prenatal and Perinatal Risk Factors for Autism in China}}. {J Autism Dev Disord} (Apr 1)
We conducted a case-control study using 190 Han children with and without autism to investigate prenatal and perinatal risk factors for autism in China. Cases were recruited through public special education schools and controls from regular public schools in the same region (Tianjin), with frequency matching on sex and birth year. Unadjusted analyses identified seven prenatal and seven perinatal risk factors significantly associated with autism. In the adjusted analysis, nine risk factors showed significant association with autism: maternal second-hand smoke exposure, maternal chronic or acute medical conditions unrelated to pregnancy, maternal unhappy emotional state, gestational complications, edema, abnormal gestational age (<35 or >42 weeks), nuchal cord, gravidity >1, and advanced paternal age at delivery (>30 year-old).
