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- W45447746 abstract "Autism spectrum disorder (ASD) is a pervasive neurodevelopmental condition that affects almost 1% of the population. One of the main challenges in the current ASD research is to define the early neurocognitive impairments that provide critical foundations for the core deficits in social and communication abilities. In particular, early attentional dysfunctions may play a critical role in the emergence of ASD. In this doctoral thesis I present six studies that give significant new insights into the nature of altered visual attention in individuals with ASD and their possible neural underpinnings.In the first study we show that individuals with ASD are impaired in enlarging (i.e., “zooming-out”) the attentional focus size relative to the control group and this deficit can impact the rapid orienting toward a cued location in the visual field. The second and the third studies show how parents without any history of ASD but with elevated autistic traits can transmit to their infants subtle deficit in visual attention (at the expense of both orienting and zooming mechanism) that may impact children’s future socio-communicative abilities. In the fourth and the fifth studies we employed transcranial magnetic stimulation and dense-array electroencephalography, respectively, with typical adults participants and we show that a network of frontal (mainly FEF and IFG) and parietal (mainly IPS/SPL) brain areas are fundamental in regulating the size of the attentional focus. In the last study, we evaluated the spatial profile of the attentional focus in individuals with ASD and results show that the inhibitory ring outside the focus of attention – fundamental to attenuate processing of irrelevant information – is significantly weakened relative to the control group.Overall, these findings show the importance of attentional impairments in the core manifestations of ASD and in its developmental course. Defining attentional abnormalities and their neural correlates is extremely important (i) to improve the early detection of the disorder and, (ii) to implement timely prevention programs to reduce the incidence of ASD." @default.
- W45447746 created "2016-06-24" @default.
- W45447746 creator A5091257055 @default.
- W45447746 date "2014-01-29" @default.
- W45447746 modified "2023-09-27" @default.
- W45447746 title "The deployment of visual attention in autism spectrum disorders" @default.
- W45447746 hasPublicationYear "2014" @default.
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