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意识的生理学意识有二个组成部分:意识的内容及“开关”系统。意识的内容即较高级的大脑功能,包括记忆、思维、定向及情感,还有通过语言、听觉、视觉、技巧性运动及复杂反应与客观世界保持联系的机敏力。所有这些功能取决于大脑半球的完整性。大脑皮层或大脑半球任何局部的功能丧失产生相应的神经缺失症状而不一定损害意识。然而大脑丧失功能的区域越大,意识内容缩小亦越重。意识的天然“开关”系统可比喻为一个电闸,能激活皮层以产生意识的内容。它来自
Consciousness of physiological awareness has two components: the content of consciousness and the “switch” system. The content of consciousness is higher-order brain functions, including memory, thinking, orientation and emotion, as well as the alertness of keeping in touch with the objective world through speech, hearing, visual, tricky movement and complex reactions. All of these functions depend on the integrity of the hemisphere of the brain. Any partial loss of function in the cerebral cortex or hemisphere produces the corresponding neurological deficit symptoms without necessarily compromising consciousness. However, the greater the area of brain loss of function, the heavier the awareness is. A natural, “switch” system of consciousness can be compared to a power gate that activates the cortex to create a conscious content. It comes from