精神分裂病患者の視覚注意障害と精神症状および生活障害との関連—視覚探索課題を用いた分析

Analysis on the relation of a deficit of visual attention in schizophrenic patients and psychiatric symptoms as well as disability using a visual search task

要旨：視覚探索課題を用いて精神分裂病患者の前注意過程と集中注意過程を検討した．その結果，精神分裂病患者の前注意過程は健常者とほぼ同程度に機能しているが，集中注意過程に障害があることが示唆された．次に，視覚探索課題と精神症状および生活障害との関連の解析を行ったところ，視覚探索課題の結果の一部と生活障害とに関連性が認められた．従って，視覚注意障害は生活障害の形成に影響を及ぼしている可能性があるが精神症状とは関連が低いことが示唆された．しかし，このことについては，さらに検討を加えていくことが必要である．

　Using a visual search task, the present study investigated preattentive and focal attentional processes in schizophrenic patients. The results indicated that, in the preattentive process, the schizophrenic patients functioned at a normal level, but there was a deficit in the focal attentional process. Next, we analyzed the relationship between the visual search task and psychiatric symptoms as well as disabilities. There was a significant relation between the some values of search tasks and the disability measures but no relation between the visual search task and psychiatric symptoms, suggesting that disability may be caused by a deficit in visual attention. Further research seems to be necessary to clarify why these results were obtained.