The Japanese journal of neuropsychology

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ArticleTitle	Amnesia and confabulation after hemorrhage in the splenium of the corpus callosum accompanied by intraventricular hemorrhage
Language	J
AuthorList	Rie Yamawaki¹⁾, Toshiya Murai²⁾, Takayuki Kikuchi³⁾, Shuichi Matsuda¹⁾⁴⁾, Keita Ueda⁵⁾⁶⁾
Affiliation	¹⁾Rehabilitation Unit, Kyoto University Hospital ²⁾Department of Psychiatry, Kyoto University Graduate School of Medicine ³⁾Department of Neurosurgery, Kyoto University Graduate School of Medicine ⁴⁾Department of Orthopedic Surgery, Kyoto University Graduate School of Medicine ⁵⁾Department of Neuropsychiatry, Faculty of Medicine, Kyoto University ⁶⁾Kyoto Koka Women's University, Faculty of Health Sciences, Department of Medical Welfare, Speech Pathology Major
Publication	Japanese Journal of Neuropsychology: 37 (4), 303-314, 2021
Received	Apr 3, 2020
Accepted	Sep 14, 2021
Abstract	We report on a right-handed man in his 40's who developed amnesia, confabulation, and defective route finding after a hematoma in the splenium of the corpus callosum accompanied by intraventricular hemorrhage. Magnetic resonance imaging in the chronic phase revealed atrophy of the splenium of the corpus callosum, as well as right-dominant damage to the retrosplenial cortex and the crus of the fornix. While he presented transient delirium, amnesia, and prominent spontaneous confabulation in the acute phase, persistent amnesia, provoked confabulation, and defective route finding were the major neuropsychiatric manifestations in the chronic phase. We suspected that the combination of the lesions in the retrosplenial cortex as well as in the crus of the fornix would be responsible for the amnesia and provoked confabulation in the chronic phase. On the other hand, spontaneous confabulation in the acute phase might have occurred in the context of disturbed consciousness, which in part was caused by intraventricular hemorrhage.
Keywords	amnesia, confabulation, retrosplenial cortex, fornix