Compr Physiol:高级视觉的神经机制

2018-07-26 cuiguizhong MedSci原创

美国奥古斯塔大学脑与行为发现研究所的HegdéJ近日在Compr Physiol发表了一篇文章,系统的论述了目前对高级视觉的神经机制的理解。

美国奥古斯塔大学脑与行为发现研究所的HegdéJ近日在Compr Physiol发表了一篇文章,系统的论述了目前对高级视觉的神经机制的理解。

过去三十年来,人们对高层视觉的神经机制或对人类周围世界的视觉认知的理解取得了重大进展。视觉还作为脑功能研究的模型系统。最近出现了一些更广泛见解。

首先,有人认为视觉感知最好不要理解为其本身的终结,而是作为一种感知过程来帮助动物实现行为目标。视觉感知可能只是一种副作用,反映了在做出行为之前的视觉信息处理情况。其次,大脑本质上是一种概率计算系统,它通过集体评估(不一定是有意识地或总是最合理地)从感官器官获得关于外部世界的可用信息、行为目标、关于世界的先验知识以及可能的风险或好处来产生行为。视觉在大脑的整体功能中发挥着重要作用,它提供了大部分关于外部世界的信息。第三,视觉系统不是孤立地运作的,而是与其他大脑系统(包括其他感官系统)存在主动相互作用。最后,视觉系统的各个区域不是以严格的分层方式处理信息,而是作为各种动态脑网络的一部分,统称为"连接组"。

因此,对视觉的充分理解将需要在分子、可定量的细节中进一步深入,以理解动态大脑网络的各个方面,这些大脑网络使用视觉感知信息,并在真实世界条件下产生行为。

原文出处:

Hegde, J., Neural Mechanisms of High-Level Vision. Compr Physiol, 2018. 8(3): p. 903-953.

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