title: What Can Psychiatric Disorders Tell Us about Neural Processing of the Self?
abstract: Many psychiatric disorders are associated with abnormal self-processing. While these disorders also have a wide-range of complex, and often heterogeneous sets of symptoms involving different cognitive, emotional, and motor domains, an impaired sense of self can contribute to many of these. Research investigating self-processing in healthy subjects has facilitated identification of changes in specific neural circuits which may cause altered self-processing in psychiatric disorders. While there is evidence for altered self-processing in many psychiatric disorders, here we will focus on four of the most studied ones, schizophrenia, autism spectrum disorder (ASD), major depression, and borderline personality disorder (BPD). We review evidence for dysfunction in two different neural systems implicated in self-processing, namely the cortical midline system (CMS) and the mirror neuron system (MNS), as well as contributions from altered inter-hemispheric connectivity (IHC). We conclude that while abnormalities in frontal-parietal activity and/or connectivity in the CMS are common to all four disorders there is more disruption of integration between frontal and parietal regions resulting in a shift toward parietal control in schizophrenia and ASD which may contribute to the greater severity and delusional aspects of their symptoms. Abnormalities in the MNS and in IHC are also particularly evident in schizophrenia and ASD and may lead to disturbances in sense of agency and the physical self in these two disorders. A better future understanding of how changes in the neural systems sub-serving self-processing contribute to different aspects of symptom abnormality in psychiatric disorders will require that more studies carry out detailed individual assessments of altered self-processing in conjunction with measurements of neural functioning.
authors: Key Laboratory for Neuroinformation, School of Life Science and Technology, University of Electronic Science and Technology of China , Chengdu , China.
authors: Weihua
authors: W
authors: Zhao
authors: Lizhu
authors: L
authors: Luo
authors: Qin
authors: Q
authors: Li
authors: Keith M
authors: KM
authors: Kendrick
keywords: autism spectrum disorder; borderline personality disorder; cortical midline system; inter-hemispheric connectivity; major depression; mirror neuron system; schizophrenia; self-processing
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