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Verbal Hallucination in a Patient with Pontine Auditory Hallucinosis Akihito KIKUCHI 1 , Takehito SAWAMURA 2 , Masaru KAWAMOTO 3 , Shin-ya SANO 4 , Soichiro NOMURA 5 1Division of Behavioral Sciences, National Defense Medical College Research Institute, Tokorozawa, Japan 2Department of Psychiatry, Japan Self Defense Force-Sendai Hospital 3Higashi-Tokorozawa Hospital 4Department of Psychology, National Defense Medical College 5Department of Psychiatry, National Defense Medical College Keyword: Verbal hallucination , Pontine auditory hallucinosis pp.733-741
Published Date 2006/7/15
DOI https://doi.org/10.11477/mf.1405100291
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 In organic hallucinosis associated with pontine lesions, episodes of verbal auditory hallucination have been rarely reported. A 66-year-old male with verbal auditory hallucination induced by pontine lacunar infarction was presented. Heavy drinking had been noted since three years before the onset of the symptoms. Threatening verbal auditory hallucination had continued since two years before his initial visit to our hospital. His auditory hallucination was experienced only on the left side. Although he developed transient delusional reaction, he soon acquired and continued to use critical thinking concerning his own hallucinatory symptom. No other psychotic symptoms had ever been experienced. In our initial interview, he revealed partial reality testing to his own curious experiences and could also understand our medical explanation for the pathogenesis of his symptoms. We considered that the cause of some neurological signs including left nystagmus, ptosis, facial nerve palsy, and hearing loss could be attributable to the disturbance in the left lower pons or midbrain. The MRI showed small ischemic lesions in the lower pons. Schizophrenia, alcoholic hallucinosis or other clinical disorders could be differentiated on the basis of these clinical manifestations and MRI findings. Risperidone was effective for controlling this verbal halluciantion. The characteristic auditory hallucination in this patient was able to be explained by the direct injury of the auditory nervous system in the pons.


Copyright © 2006, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-126X 印刷版ISSN 0488-1281 医学書院

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