This study sought to investigate the relationship between going outdoor daily and prefrontal cortex activation during execution of the VFT using near-infrared spectroscopy (NIRS) in community-dwelling older adults. Blood oxygenation changes in left and right prefrontal cortices were measured in twenty older adults (mean age 76.1 ± 6.7 years) by NIRS during VFT performance. In this task, participants were required to pronounce as many nouns as possible beginning with the letters "Shi," "I," and "Re." Changes in oxygenated hemoglobin (oxy-Hb) levels during the VFT were compared between two groups defined by the frequency of going outdoors: daily or non-daily within a week. Participants in both groups exhibited significantly increased oxy-Hb levels in the left and right prefrontal cortices during the VFT compared to a resting baseline condition. After controlling for age and gender, there were significant group-by-condition interactions on oxy-Hb levels with less activation during the execution of the VFT over both cortices in the non-daily group (left: F=4.76, p=0.04; right: F=6.32, p=0.02). These findings indicate that going outdoors daily is associated with increased activation in the prefrontal cortices during VFT performance in community-dwelling older adults.

译文

:这项研究旨在调查居住在社区的老年人中,每天进行户外运动与使用近红外光谱(NIRS)进行VFT期间前额叶皮层激活之间的关系。在VFT表现期间,通过NIRS对20名老年人(平均年龄76.1±6.7岁)测量了左前额叶皮层和右前额叶皮层中的血液氧合变化。在此任务中,要求参与者以字母“ Shi”,“ I”和“ Re”开头的尽可能多的名词发音。在VFT期间,比较了两组由户外活动频率定义的两组之间的氧化血红蛋白(oxy-Hb)水平的变化:每天或一周内的非每天一次。与静止的基线状态相比,两组的参与者在VFT期间左,右前额叶皮层的氧合血红蛋白水平均显着升高。在控制了年龄和性别之后,非每日组的两个皮层在执行VFT时,氧合血红蛋白水平存在显着的组间条件交互作用,而激活较少(左:F = 4.76,p = 0.04;右:F = 6.32,p = 0.02)。这些发现表明,在社区居住的老年人中,每天进行户外运动与在VFT表现中前额叶皮层的激活增加有关。

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