(2009) showed that autistic traits in neurotypical adults were related to the pregenual anterior cingulate cortex connectivity with insula, and more specifically, this connectivity being limited to the anterior mid-insula rather than anterior insula per se. Recently, impairments in functional networks as an explanation for socio-cognitive difficulties in autism have been receiving more support in the literature than dysfunction of a single brain region ( Kana et al., 2011). Although there is substantial experimental support for atypical amygdala activation in individuals with autism (e.g., Critchley et al., 2000 Ashwin et al., 2006, 2007), some studies have questioned whether the amygdala plays a specific role of emotional recognition in autism (e.g., Paul et al., 2010 Birmingham et al., 2011 also see Zalla and Sperduti, 2013). Several theoretical models have been proposed for explaining atypical socio-emotional behavior in autism (see reviews, Gaigg, 2012 Hamilton, 2013), and one of them, the Amygdala Theory of Autism, suggests that dysfunction or damage of the amygdala region leads to social impairments in autism ( Baron-Cohen et al., 2000). ![]() However, this finding is not uniform (e.g., Ozonoff et al., 1990 Piggot et al., 2004 Castelli, 2005). It has been proposed that individuals with ASD have difficulties in the processing of facial expressions, particularly for complex or negative emotional expressions ( Adolphs et al., 2001 Castelli, 2005 Golan et al., 2007). The results observed on the N2, showing group differences in subliminal emotion processing, suggest that decreased sensitivity to the reward value of social stimuli is a common feature both of people with ASD as well as people with high autistic traits from the normal population.Īutism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by difficulties in reciprocal social interaction and a restricted range of interests and behaviors ( American Psychiatric Association, 2000, 2013). Although results did not show any group differences on the face-specific N170 component, there were shorter N170 latencies for supraliminal vs. Some group differences were found in the condition effects, with the Low AQ showing shorter frontal P3b and N4 latencies for subliminal vs. Individuals with low and high AQ differed in the processing of subliminal faces, with the low AQ group showing an enhanced N2 amplitude for subliminal happy faces. Event-related potentials (ERPs) were recorded during viewing of backward-masked neutral, fearful and happy faces presented under two conditions: subliminal (16 ms, below the level of visual conscious awareness) and supraliminal (166 ms, above the time required for visual conscious awareness). This study examined the processing of emotional faces in typically developing adults with high and low levels of autistic traits (measured using the Autism Spectrum Quotient-AQ). ![]() People with Autism spectrum disorder (ASD) show difficulty in social communication, especially in the rapid assessment of emotion in faces. Centre for Human Psychopharmacology, Swinburne University of Technology, Melbourne, VIC, Australia.Svjetlana Vukusic Joseph Ciorciari David P.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |