A Case of Bilateral Temporal Lobe Injury that Gave Rise to Aberrant Social Behavior after Recurrence of Cerebral Infarction in the Right Temporal Lobe

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  • 右側頭葉の脳梗塞の再発により社会的行動障害が出現した両側側頭葉損傷の 1 例

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<p>  In this study, we report a case of aberrant social behavior after bilateral temporal lobe injury. The patient was a right-handed male aged 70 years. He had developed a cerebral infarction about 10 years previously and was diagnosed with Wernickeʼs aphasia. Problems in communication increased with the recurrence of cerebral infarction in the right temporal lobe cortex, and his behavior became aggressive and disinhibited. As a result of the auditory comprehension test, no obvious deterioration of speech discrimination ability or auditory agnosia was observed. However, following the prosody comprehension test, prosody comprehension disorder was suspected. Furthermore, the characteristics of the aberrant social behavior in this case were similar to those of frontotemporal dementia. Therefore, it was clarified that aberrant social behavior appeared even in association with localized lesions of the bilateral temporal lobe. On the other hand, the characteristics of the patientʼs aberrant social behavior case were qualitatively different from those caused by localized damage to the frontal lobe and were specific to bilateral temporal lobe injury.</p>

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