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      Atypical Social Modulation of Imitation in Autism Spectrum Conditions

      research-article
      1 , 1 , 2 ,
      Journal of Autism and Developmental Disorders
      Springer US
      Autism, Imitation, Mirror neuron, Social priming

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          Abstract

          Appropriate modulation of imitation according to social context is important for successful social interaction. In the present study we subliminally primed high-functioning adults with ASC and age- and IQ-matched controls with either a pro- or non- social attitude. Following priming, an automatic imitation paradigm was used to acquire an index of imitation. Whereas imitation levels were higher for pro-socially primed relative to non-socially primed control participants, there was no difference between pro- and non- socially primed individuals with ASC. We conclude that high-functioning adults with ASC demonstrate atypical social modulation of imitation. Given the importance of imitation in social interaction we speculate that difficulties with the modulation of imitation may contribute to the social problems characteristic of ASC.

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          When the social mirror breaks: deficits in automatic, but not voluntary, mimicry of emotional facial expressions in autism.

          Humans, infants and adults alike, automatically mimic a variety of behaviors. Such mimicry facilitates social functioning, including establishment of interpersonal rapport and understanding of other minds. This fundamental social process may thus be impaired in disorders such as autism characterized by socio-emotional and communicative deficits. We examined automatic and voluntary mimicry of emotional facial expression among adolescents and adults with autistic spectrum disorders (ASD) and a typical sample matched on age, gender and verbal intelligence. Participants viewed pictures of happy and angry expressions while the activity over their cheek and brow muscle region was monitored with electromyography (EMG). ASD participants did not automatically mimic facial expressions whereas the typically developing participants did. However, both groups showed evidence of successful voluntary mimicry. The data suggest that autism is associated with an impairment of a basic automatic social-emotion process. Results have implications for understanding typical and atypical social cognition.
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            Sensorimotor learning configures the human mirror system.

            Cells in the "mirror system" fire not only when an individual performs an action but also when one observes the same action performed by another agent [1-4]. The mirror system, found in premotor and parietal cortices of human and monkey brains, is thought to provide the foundation for social understanding and to enable the development of theory of mind and language [5-9]. However, it is unclear how mirror neurons acquire their mirror properties -- how they derive the information necessary to match observed with executed actions [10]. We address this by showing that it is possible to manipulate the selectivity of the human mirror system, and thereby make it operate as a countermirror system, by giving participants training to perform one action while observing another. Before this training, participants showed event-related muscle-specific responses to transcranial magnetic stimulation over motor cortex during observation of little- and index-finger movements [11-13]. After training, this normal mirror effect was reversed. These results indicate that the mirror properties of the mirror system are neither wholly innate [14] nor fixed once acquired; instead they develop through sensorimotor learning [15, 16]. Our findings indicate that the human mirror system is, to some extent, both a product and a process of social interaction.
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              Is Open Access

              The social brain: allowing humans to boldly go where no other species has been

              The biological basis of complex human social interaction and communication has been illuminated through a coming together of various methods and disciplines. Among these are comparative studies of other species, studies of disorders of social cognition and developmental psychology. The use of neuroimaging and computational models has given weight to speculations about the evolution of social behaviour and culture in human societies. We highlight some networks of the social brain relevant to two-person interactions and consider the social signals between interacting partners that activate these networks. We make a case for distinguishing between signals that automatically trigger interaction and cooperation and ostensive signals that are used deliberately. We suggest that this ostensive signalling is needed for ‘closing the loop’ in two-person interactions, where the partners each know that they have the intention to communicate. The use of deliberate social signals can serve to increase reputation and trust and facilitates teaching. This is likely to be a critical factor in the steep cultural ascent of mankind.
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                Author and article information

                Contributors
                +44-207-6791128 , jennifer.cook@ucl.ac.uk
                +44-207-6316209 , +44-207-6316312 , g.bird@bbk.ac.uk
                Journal
                J Autism Dev Disord
                J Autism Dev Disord
                Journal of Autism and Developmental Disorders
                Springer US (Boston )
                0162-3257
                1573-3432
                11 August 2011
                11 August 2011
                June 2012
                : 42
                : 6
                : 1045-1051
                Affiliations
                [1 ]Institute of Cognitive Neuroscience, UCL, 17 Queen Square, London, WC1N 3AR UK
                [2 ]Department of Psychological Science, Birkbeck College, Malet St, London, WC1E 7HX UK
                Article
                1341
                10.1007/s10803-011-1341-7
                3360861
                21833823
                b9620fa7-aec3-468e-b762-35e912b36e52
                © The Author(s) 2011
                History
                Categories
                Original Paper
                Custom metadata
                © Springer Science+Business Media, LLC 2012

                Neurology
                social priming,mirror neuron,imitation,autism
                Neurology
                social priming, mirror neuron, imitation, autism

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