注意障害のある脳血管障害患者の聴覚，視覚，視聴覚同時刺激に対する定位反応に関する研究

Orienting response to auditory, visual and simultaneous audio-visual stimuli among cerebral vascular disorder patients with attentional disorder

要旨：3種の感覚刺激に対する反応の早さ(選択反応時間)と正確さ(正答率，的中率)を調べることで，注意障害のある脳血管障害患者(以下，CVD群)の定位反応の特徴を検討した．対象はCVD群と健常者(以下，対照群)各11人で，2方向から左右アトランダムに聴覚刺激，視覚刺激，視聴覚同時刺激を呈示し，感覚刺激の発信源の定位検査を行った．その結果，CVD群は対照群に比しどの感覚刺激においても反応が遅く，特に聴覚刺激で顕著だった．またCVD群は視聴覚同時刺激に比し聴覚，視覚の単一刺激ではその発信源を誤認しやすいという特徴が見られた．それらに関し，主たる要因として注意障害が背景にあり，運動機能障害の影響も考えられた．

　We studied the characteristics of orienting response among cerebral vascular disorder (CVD group) patients with attentional disorder, by examining the speed (choice reaction time) and accuracy (correct answer rate and hit rate) of responses to three types of sensory stimuli. Participants were divided into a CVD group and a healthy group (control group), each consisting of 11 subjects. We performed tests by presenting random auditory stimuli, visual stimuli, and simultaneous visual and auditory stimuli from either right or left, and had participants identify the source of the sensory stimuli. The results showed that responses to sensory stimuli of the CVD group were slower than those of the comparison group, and this was particularly pronounced for auditory stimuli. Furthermore, the CVD group had a tendency to misidentify the source of single auditory or visual stimuli, compared to simultaneous visual and auditory stimuli. We believe that the primary cause of this was the influence of attentional disorder and other motor dysfunctions.