Department of Physiology, Faculty of Medicine, Umm-Al-Qura University, Makkah, Saudi Arabia.
Department of Pharmacology, Faculty of Pharmacy, Umm-Al-Qura University, Makkah, Saudi Arabia.
Metab Brain Dis. 2018 Aug;33(4):1203-1210. doi: 10.1007/s11011-018-0230-6. Epub 2018 Apr 13.
The comparative effects of coffee robusta and coffee arabica (Qahwa) on different attention and memory related assignments were measured in a double-blind study of 300 healthy young adult women who were randomly assigned to one of three different drinks: Group I (coffee robusta sachet dissolved in 100 ml of hot water): Group II (coffee arabica): and group III (100 ml water only). Cognitive function was assessed by standardized tests. Several monitoring cognitive tests and tasks were specifically chosen and performed to investigate the comparative effects of coffee robusta (CR) and coffee arabica (Qahwa; AC) on sleepiness (sleep and clear headed scale), attention (trail A & B, symbol digit, letter cancellation), general cognitive ability (stroop test) and memory (card test). Data was interpreted by analysis of variance (ANOVA). The present study revealed that coffee robusta has beneficial effects on attention, general cognitive ability and memory. Higher though non-significant cognitive scores were associated with coffee robusta consumption. Although, consumption of coffee arabica (Qahwa) has significant effects (P < 0.05) on sleepiness, attention, general cognitive ability and memory and it significantly improve reaction time and correct responses. Since different tasks were related to the sustained attention and working memory processes, results would suggest that coffee arabica (qahwa) could increase the memory and efficiency of the attentional system might be due to the presence of chlorogenic acids (CGA) which are found in less quantity in coffee robusta. However, more studies using larger samples and different tasks are necessary to better understand the effects of coffee robusta and arabica (Qahwa) on attention and memory.
在一项针对 300 名健康年轻成年女性的双盲研究中，比较了罗布斯塔咖啡和阿拉伯咖啡（卡瓦）对不同注意力和记忆相关任务的影响，这些女性被随机分配到三种不同的饮料中：第 I 组（溶于 100ml 热水的罗布斯塔咖啡袋）：第 II 组（阿拉伯咖啡）；和第 III 组（仅 100ml 水）。认知功能通过标准化测试进行评估。选择了几种监测认知测试和任务，专门用于研究罗布斯塔咖啡（CR）和阿拉伯咖啡（Qahwa；AC）对困倦（睡眠和清醒量表）、注意力（轨迹 A 和 B、符号数字、字母取消）、一般认知能力（斯特鲁普测试）和记忆（卡片测试）的比较影响。数据通过方差分析（ANOVA）进行解释。本研究表明，罗布斯塔咖啡对注意力、一般认知能力和记忆力有有益的影响。与罗布斯塔咖啡消费相关的认知评分较高，但不显著。尽管阿拉伯咖啡（Qahwa）的消费对困倦、注意力、一般认知能力和记忆力有显著影响（P<0.05），并且显著提高了反应时间和正确反应，但它对注意力、一般认知能力和记忆力有显著影响。由于不同的任务与持续注意力和工作记忆过程有关，结果表明，阿拉伯咖啡（qahwa）可能通过增加注意力系统的记忆和效率来增加注意力系统的记忆和效率，这可能是由于存在绿原酸（CGA），绿原酸在罗布斯塔咖啡中的含量较少。然而，需要更多使用更大样本和不同任务的研究来更好地了解罗布斯塔咖啡和阿拉伯咖啡（Qahwa）对注意力和记忆的影响。
