Acting as a brain stimulant, coffee resulted in heightening alertness, keeping arousal, improving executive speed, maintaining vigilance, and promoting memory, which are associated with attention, mood, and cognitive function. Functional near-infrared spectroscopy (fNIRS) is a noninvasive optical method to monitor brain activity by measuring the absorption of the near-infrared light through the intact skull. This study is aimed at acquiring brain activation during executing task performance. The aim is to explore the effect of coffee on cognitive function by the fNIRS neuroimaging method, particularly on the prefrontal cortex regions. The behavioral experimental results on 31 healthy subjects with a Stroop task indicate that coffee can easily and effectively modulate the execute task performance by feedback information of the response time and accuracy rate. The findings of fNIRS showed that apparent hemodynamic changes were detected in the bilateral VLPFC regions and the brain activation regions varied with different coffee conditions.

中文翻译：

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Stroop 任务期间咖啡因对认知功能的影响：fNIRS 研究

作为一种大脑兴奋剂，咖啡可以提高警觉性、保持清醒、提高执行速度、保持警惕和促进记忆，这些都与注意力、情绪和认知功能有关。功能性近红外光谱 (fNIRS) 是一种无创光学方法，通过测量穿过完整颅骨的近红外光的吸收来监测大脑活动。本研究旨在在执行任务执行过程中获得大脑激活。目的是通过 fNIRS 神经成像方法探索咖啡对认知功能的影响，特别是对前额叶皮层区域的影响。对 31 名执行 Stroop 任务的健康受试者的行为实验结果表明，咖啡可以通过响应时间和准确率的反馈信息轻松有效地调节执行任务的表现。fNIRS 的研究结果表明，在双侧 VLPFC 区域检测到明显的血流动力学变化，大脑激活区域随咖啡条件的不同而变化。