精神分裂病者の探索眼球運動と課題遂行能力—電車路線図料金表を用いて

The relationship between exploratory eye movements and OT tasks of schizophrenic patients: A use of the train line figure tariff

要旨：分裂病者と健常者を対象に，使い慣れた電車の簡単な路線図料金表を用いて探索眼球運動と課題遂行能力の関係を検討した．

　分裂病者は健常者と比較して全体から部分，部分から全体というような探索・確認するような動きが少なく，長い停留，狭い視野，少ない運動が認められた．そして，課題遂行能力やOT出席率が低いほど，出発駅を探索することや全体を再確認することが少なく，指示の認知に対する統合した構えがより障害されていることが認められた．以上より，分裂病者の視覚情報処理過程の障害が課題遂行能力に影響していることが考えられた．

　We examined the relationship between exploratory eye movement and OT tasks in 18 schizophrenic patients in comparison with 18 healthy persons.

　The easy-line figure tariff of the train was shown, and it indicated: "It goes from the Dazaifu station to the Kurume station. Confirm a charge." The eye movements were analyzed with an eye-mark recorder with five parameters: mean gazing time, total number of gazing points, mean and total scanning length of gazing points, the frequency of gazing point shift. The schizophrenic patients had significantly longer gazing time and narrower eye movements than those of healthy subjects. The schizophrenic patients had a few eye movements, confirming a part from the whole in comparison with the healthy persons. And, there were a few eye movements, confirming the whole from the part, too.

　The evaluation of OT used the percentage of OTs attendance per one month and the Work scale of LASMI (W-scale). The W-scale and the percentage of OTs attendance are linked to the search of the departure station and reconfirmation of the whole.

　Results suggest that schizophrenic patients have a disorder with regard to recognition of verbal directions.

　Furthermore, these results indicate visual cognitive deficits.