Those children with autism who also had macrocephaly showed a greater processing cost when switching into global processing, or ‘zooming out’, than both the remaining children with autism and the control children. A second

experiment revealed that macrocephaly in the context of normal development is not associated with difficulty switching into global processing but rather occurs in children who are physically large. Macrocephaly in the context of autism may therefore be a biological marker of abnormal neural connectivity, and of a local processing bias. (C) 2009 Elsevier Ltd. All rights reserved.”
“The event-related potential (ERP) technique was used to investigate the neural dynamics in processing different levels of the hierarchical syntactic structure selleck chemicals during comprehension of Chinese sentences with the ba construction. Veliparib chemical structure In these sentences, the structural auxiliaries, which mark either the adjective (de) or the adverb (-di) category, were embedded

in a hierarchical structure at the lower level, i.e., BA – adjective (-de)-noun-verb, or at the higher level, i.e., BA – noun-adverb (-di)-verb. Violations of the lower- and the higher-level structural constraints were constructed by misapplication of these structural auxiliaries. Participants were required to read all the sentences for comprehension and to complete a sentence recognition test at the end of the experiment. Violation of the

lower-level constraints elicited a left-lateralized, anteriorly maximized negativity, whereas violation of the higher-level constraints elicited a right anterior negativity (RAN) and a right centro-parietal negativity (N400) from 300 to 500 ms post-onset https://www.selleck.cn/products/frax597.html of the auxiliary phrase. Neither type of violation led to a late positivity effect on the critical auxiliary phrases. These findings suggest that processing different levels of syntactic hierarchy during natural language comprehension may involve different neural mechanisms. (C) 2009 Elsevier Ltd. All rights reserved.”
“The origins of human handedness remain unknown. Genetic theories of handedness have received much attention, but some twin studies suggest modest, perhaps negligible genetic effects on handedness. A related question concerning handedness is whether twins have higher rates of left-handedness than do singletons. We studied handedness, with information on forced right-handedness, in a sample of 30 161 subjects aged 18-69 from a questionnaire survey of the older Finnish Twin Cohort. Left-handedness was found to be more common in twins (8.1%) and triplets (7.1%) than in singletons (5.8%), whereas ambidextrousness was more common in triplets (6.4%) than in twins (3.4%) and singletons (3.5%). As in many other studies, males were more likely to be left-handed.