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Hiroki Oi

Department of Neuropsychiatry Keio University School of Medicine Tokyo Japan.

1 paper in the library · publishing 2025

Papers

A sense of being inserted by the original self: A distinctive manifestation of delusional misidentification of the self, a case report.

PCN reports : psychiatry and clinical neurosciences December 1, 2025 Akihiro Koreki, Masataka Kaji, Hiroki Oi et al.

A patient with schizophrenia denied his original name, referred to himself by a female name, and believed he had a female body, consistent with reverse intermetamorphosis, a subtype of delusional misidentification of the self. He also experienced Capgras delusion involving his parents and described being controlled by an external agent who bore his original name. These symptoms suggest that a marked disruption of the sense of agency, along with delusional compensatory mechanisms, may contribute to profound psychological changes in the self. Bodily alterations and comorbid Capgras delusion may further disturb the sense of self, with a delusional agent dominating the original sense of agency and generating a unified self centered on that agent.