Dresp-Langley Birgitta, Durup Jean
Centre National de la Recherche Scientifique-UMR 5508, Université Montpellier 2, CC048 34095 Montpellier Cedex 5, France.
Neural Plast. 2009;2009:482696. doi: 10.1155/2009/482696. Epub 2009 Jul 22.
Consciousness is known to be limited in processing capacity and often described in terms of a unique processing stream across a single dimension: time. In this paper, we discuss a purely temporal pattern code, functionally decoupled from spatial signals, for conscious state generation in the brain. Arguments in favour of such a code include Dehaene et al.'s long-distance reverberation postulate, Ramachandran's remapping hypothesis, evidence for a temporal coherence index and coincidence detectors, and Grossberg's Adaptive Resonance Theory. A time-bin resonance model is developed, where temporal signatures of conscious states are generated on the basis of signal reverberation across large distances in highly plastic neural circuits. The temporal signatures are delivered by neural activity patterns which, beyond a certain statistical threshold, activate, maintain, and terminate a conscious brain state like a bar code would activate, maintain, or inactivate the electronic locks of a safe. Such temporal resonance would reflect a higher level of neural processing, independent from sensorial or perceptual brain mechanisms.
众所周知，意识的处理能力有限，并且常常根据单一维度（时间）上独特的处理流来描述。在本文中，我们讨论一种与空间信号功能解耦的纯时间模式编码，用于大脑中意识状态的生成。支持这种编码的论据包括德阿纳等人的长距离回响假设、拉马钱德兰的重新映射假说、时间相干指数和符合探测器的证据，以及格罗斯伯格的自适应共振理论。我们开发了一种时间单元共振模型，其中意识状态的时间特征是基于信号在高度可塑性神经回路中的远距离回响而生成的。这些时间特征由神经活动模式传递，当超过一定的统计阈值时，这些神经活动模式就会像条形码激活、维持或停用保险箱的电子锁一样，激活、维持并终止有意识的大脑状态。这种时间共振将反映出一个更高层次的神经处理过程，独立于感觉或感知的大脑机制。
