Abstract
目的 探究高原(海拔约2 850m)和平原(海拔约400m)环境下完全睡眠剥夺(sleep deprivation,SD)对工作记忆能力的影响.方法完全SD条件下,分别在高原和平原对15名被试(高原7名,平原8名)进行间隔为6h的8次工作记忆测验.此测验的任务包括两种:一为字母内容匹配任务,一为字母位置匹配任务.结果①两种工作记忆任务上,高原与平原相比,各时间点的测量值差异均未达到显著性水平;②高原和平原环境下,SD各时间点的工作记忆测量值同基础值相比,除时间点2(第1天下午)、时间点3(第1天晚上)以外,其余差异均达显著性水平;③在高原环境下,时间点5(第2天早上)两项工作记忆任务测验成绩同时间点4(第1天夜间)相比均未呈现升高趋势,字母内容匹配任务测验成绩表现尤为明显,与平原不一.结论中等海拔高度(2 100～3 050m)的高原,在只进行轻体力劳动的情况下,45h完全SD对机体工作记忆能力的影响与平原大致相似.SD超过20h,工作记忆能力显著低于基础值。
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