Social cognition in autism. A survey of functional imaging studies
Klinik und Poliklinik für Psychiatrie und Psychotherapie, Zentrum für Nervenheilkunde der Universität Rostock, Gehlsheimer Strasse 20, 18147 Rostock. Der Nervenarzt
(Impact Factor: 0.79).
04/2008; 79(3):261-74. DOI: 10.1007/s00115-008-2409-2
Autism spectrum disorders (autism, Asperger's syndrome, high-functioning autism) are characterized by a common pattern of marked impairments in social interactions. Deficits have been described in face processing, facial emotion recognition, and social attribution ("theory of mind") or generally speaking in social cognition. Some studies have shown that these impairments are already detectable in early childhood, leading to the assumption that the underlying cause is an early disruption of neuronal development. Accordingly, neuroimaging data have revealed alterations of structure and function in the brains of autistic children, adolescents, and adults. The present review gives a systematic overview of the existing literature on functional imaging studies using experimental paradigms of social cognition, i.e. face discrimination, facial emotion recognition, and theory of mind in autistic disorders.
Available from: Simon B Eickhoff
- "It stands to be reasoned that such reduced or distorted input, if present during development as it may be assumed in a developmental disorder such as ASD, would have substantial effects on the shaping of capacities emerging from it. Given the behavioral evidence reviewed above, it may thus be argued that aberrant facial processing may lead to dysfunctional mechanisms for mimicry and intention understanding and ultimately deficits in complex social processes such as theory of mind, all of which have been shown to be abnormal in patients with ASD (Domes et al. 2008). Consequently and in synopsis with the earlier discussion of visual processing aberrations, we would argue that aberrant sensory (visual) processing may be a central pathophysiological aspect in ASD, whereas the clinically more prominent deficits in social processing are secondary effects of these. "
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ABSTRACT: One of the most consistent neuropsychological findings in autism spectrum disorders (ASD) is a reduced interest in and impaired processing of human faces. We conducted an activation likelihood estimation meta-analysis on 14 functional imaging studies on neural correlates of face processing enrolling a total of 164 ASD patients. Subsequently, normative whole-brain functional connectivity maps for the identified regions of significant convergence were computed for the task-independent (resting-state) and task-dependent (co-activations) state in healthy subjects. Quantitative functional decoding was performed by reference to the BrainMap database. Finally, we examined the overlap of the delineated network with the results of a previous meta-analysis on structural abnormalities in ASD as well as with brain regions involved in human action observation/imitation. We found a single cluster in the left fusiform gyrus showing significantly reduced activation during face processing in ASD across all studies. Both task-dependent and task-independent analyses indicated significant functional connectivity of this region with the temporo-occipital and lateral occipital cortex, the inferior frontal and parietal cortices, the thalamus and the amygdala. Quantitative reverse inference then indicated an association of these regions mainly with face processing, affective processing, and language-related tasks. Moreover, we found that the cortex in the region of right area V5 displaying structural changes in ASD patients showed consistent connectivity with the region showing aberrant responses in the context of face processing. Finally, this network was also implicated in the human action observation/imitation network. In summary, our findings thus suggest a functionally and structurally disturbed network of occipital regions related primarily to face (but potentially also language) processing, which interact with inferior frontal as well as limbic regions and may be the core of aberrant face processing and reduced interest in faces in ASD.
Brain Structure and Function 05/2014; 220(4). DOI:10.1007/s00429-014-0791-z · 5.62 Impact Factor
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ABSTRACT: Since its first use in medical literature the meaning of the term autism has constantly changed. An historical overview indicates that in both adult and child psychiatry autism was first used to refer to a symptom of schizophrenia. Later on the use of the term in child psychiatry took a different independent course, which led to present-day conceptualization of autism, mainly due to the work of Leo Kanner and Hans Asperger. Currently autism and autistic disorders are regarded as severe developmental disorders and, due to their stable nature, have gained considerable attention in adult psychiatry. In order to better understand this development, the path from onset to reception is traced via Kanner and Asperger. In the search for central characteristics of autism, one finds restrictions in social communication and interaction, which can be explained by fundamental deficits in social cognition. These restrictions in social cognition can be considered the central characteristic of autism - one which has been a constant since the phenomenon was first described. Our historical review considers to what extent experimental psychopathological research can deepen our understanding of the disorder.
Der Nervenarzt 08/2009; 81(1):55-65. · 0.79 Impact Factor
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ABSTRACT: Autism spectrum disorders (ASD), are pervasive developmental disorders, which are defined by qualitative impairment in reciprocal social interaction and communication as well as by stereotyped repetitive behaviour. Newer epidemiological studies report a prevalence of 1 %. However, parents and self-help organisations report a considerable lack of diagnostic services, especially in the university hospital setting. In order to receive funding for adequate treatment at an "autism therapy centre", a Consultant psychiatrist has to diagnose ASD.
We assessed the diagnostic and therapeutic facilities for adults with ASD by sending out questionnaires to 33 German university hospitals. Furthermore, we evaluated the demographic data of the first 74 patients that presented at the specialist clinic for adults with ASD at the Department for Psychiatry and Psychotherapy, RWTH Aachen University.
At the time of the evaluation, only 9 university hospitals in Germany offered a specialist clinic for diagnostics and/or treatment for adults with ASD. A comorbid psychiatric disorder was diagnosed in 52.9 % of the patients presenting at the specialist clinic for adult ASD. These were mostly mental retardation and affective disorders. The most common differential diagnosis for the patients presenting at the service were affective and personality disorders.
There is still great need of specialist services at university hospitals in Germany for adults with ASD, although more services have been established over the past few years. Over half of the patients with ASD had other psychiatric comorbid disorders, which were mostly mental retardation and affective disorders. The most common differential diagnosis for patients presenting at the clinics were personality disorders and depression.
Fortschritte der Neurologie · Psychiatrie 07/2010; 78(7):402-13. DOI:10.1055/s-0029-1245494 · 0.63 Impact Factor
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