Indirect biological measures of consciousness from field studies of brains as dynamical systems
Indirect biological measures of consciousness from field studies of brains as dynamical systems
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DOI：
10.1016/j.neunet.2007.09.004
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发表时间：
2007-11-01
期刊：
影响因子：
7.8
通讯作者：
Freeman, Walter J.
中科院分区：
文献类型：
--
作者：
Freeman, Walter J.
当头部 1.5 公斤重的原生质引导身体进入物质和社会环境并进行互惠时，意识就完全随之产生。虽然意识不易直接测量，但可以通过唤醒、意图和注意力的生物测定来间接测量动物和语言前儿童的有限形式。在本文中，意识被视为在从亚原子到社会的各个层面的领域中同时运作。层次之间的关系和换位需要复杂的数学处理，而这些处理在很大程度上仍有待设计。在预期这些发展的过程中，对现有的实验数据进行了审查，涉及几个层面的状态变量，这些层面共同构成了生物意识的基础。描述了代表意识中换位的神经机制的基本隐喻。描绘了时空神经活动模式作为可能代表意识内容的场出现的过程。动态分析的结果是通过区分神经元学说所规定的神经点过程与皮层神经团生成的连续可变神经场的术语来讨论的。 (c) 2007 Elsevier Ltd. 保留所有权利。
Consciousness fully supervenes when the 1.5 kgm mass of protoplasm in the head directs the body into material and social environments and engages in reciprocity. While consciousness is not susceptible to direct measurement, a limited form exercised in animals and pre-lingual children can be measured indirectly with biological assays of arousal, intention and attention. In this essay consciousness is viewed as operating simultaneously in a field at all levels ranging from subatomic to social. The relations and transpositions between levels require sophisticated mathematical treatments that are largely still to be devised. In anticipation of those developments the available experimental data are reviewed concerning the state variables in several levels that collectively constitute the substrate of biological consciousness. The basic metaphors are described that represent the neural machinery of transposition in consciousness. The processes are sketched by which spatiotemporal neural activity patterns emerge as fields that may represent the contents of consciousness. The results of dynamical analysis are discussed in terms serving to distinguish between the neural point processes dictated by the neuron doctrine vs. continuously variable neural fields generated by neural masses in cortex. (c) 2007 Elsevier Ltd. All rights reserved.