Differences in Brain Activity During Imitation Movements from the Perspective of 1PPI and 3PPI when a Therapist and a Patient are Seated Next to Each Other : The subject's '3ppi task' activates the left angular gyrus, while the other's '3ppi task' activates the right angular gyrus

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  • 隣に座ったセラピストと患者様の一人称的視点・三人称的視点を想定した 模倣運動の脳活動の相違について ―被験者の三人称イメージ課題は左角回を賦活し第三者の三人称イメージ課題は右角回を賦活する―
  • トナリ ニ スワッタ セラピスト ト カンジャ サマ ノ イチニンショウテキ シテン ・ サンニンショウテキ シテン オ ソウテイ シタ モホウ ウンドウ ノ ノウ カツドウ ノ ソウイ ニ ツイテ : ヒケンシャ ノ サンニンショウ イメージ カダイ ワ サカクカイ オ フカツ シ ダイサンシャ ノ サンニンショウ イメージ カダイ ワ ウカクカイ オ フカツ スル

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When performing rehabilitation for patients using motor imagery, there are two main modes: firstperson perspective imagery (1PPI: Kinesthetic motor imagery) and third-person perspective imagery (3PPI: Visual motor imagery). The purpose of this study is to determine the cortical representations in one's own 1PPI and 3PPI during motor imagery when engaging in toe movements in healthy people. Fifteen healthy subjects with right-dominant legs participated in the study after signing consent forms. An fMRI scan of 1.5T was used to map cortical representations associated with motor tasks of the right toes. In these tasks, subjects watched video clips depicting one's own 1PPI or 3PPI involving toe movements and were required to imitate the same actions. This time, the patients assumed that the lower limb image of the therapist sitting next to them us was "someone else's 1PPI task". Then, we prepared video clips of the patient's own 1PPI and 3PPI. Furthermore, using someone else's 1PPI imitation movement as a medium, we had patients imitate movements while looking at their own feet next to the therapist and then had patients who imitate the images reflected in the mirror next to the therapist. As a result, the patient's own 3PPI task, when compared with their own 1PPI task, showed an increased activation in the left angular gyrus and left rostral anterior cingulate cortex. In our previous study, someone else's 3PPI task showed an increased activation in the right angular gyrus. The results of this study, together with previous studies, show that it is possible to selectively activate brain regions, such as the middle cerebral artery region, which is very common in cerebral infarction, by changing the therapist's standing position and the patient's line of sight.

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