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医学神经学认为,意识是机体知道自身状况、外界环境以及两者间相互关系的一种主观状态,意指意识正常者乃处于醒觉(清醒、警觉)状态,能选择性地注意某项刺激,觉察内、外环境,并对内、外环境的刺激迅速且适当地作出反应.意识属高级神经活动,是脑的物质活动的一种功能或机制.正常的意识依赖于网状结构连同其上行投射,与大脑半球神经元群体之间的相互生理作用,两者是意识系的最重要组份.意识系由多级神经元联系构成,是一多突触系统,它所包含的结构分别位在脑干、间脑和大脑半球内,脑干被盖部中央区的网状结构在功能上分为外侧区和内侧区(图1).外侧区较小,名接受区
Medical neurology believes that consciousness is the subjective state of the body knowing its own condition, the external environment and the interrelationship between the two. It means that the conscious person is in a state of awakening (awake, vigilant) and can selectively notice a stimulus , Aware of the internal and external environment, and to stimulate the internal and external environment quickly and properly respond to Consciousness is a high level of neural activity, the brain’s physical activity is a function or mechanism of normal consciousness relies on the network structure together with its Upstream projection and the interaction with the hemisphere neuron population are the two most important components of the consciousness system Consciousness consists of multilevel neuronal connections and is a multi-synapse system, Located in the brainstem, diencephalon and cerebral hemisphere, the brain stem is covered by the central part of the central network structure is divided into lateral and medial functional areas (Figure 1)