Dreams and daydreams are as beguiling as they are intangible. Both share many features, from neurobiology to the sensed experience. Nevertheless, the specific narrative relationship between both, if any, remains uncertain. Theories of dream origins are many: from the psychodynamic royal road, to biological theories including Hebbian-based memory consolidation and a unified quantum brain theory that extends to waking and dreaming alike. Both the ephemeral nature of dreams, and an inability to simultaneously study their content and biology, renders them difficult to research from a conventional biomedical perspective. This leaves agreement on the fundamental properties of dreams as ambiguous, and even the state of consciousness enjoyed during sleep is contested. What is known is that the qualia and neurophysiological signature of dreams and daydreaming share many features. We propose further, from a subjective experientialist position, that dream content is specifically derived from daydreaming or mindful wandering (subserved by the default mode network). If substantiated, this concept offers a new insight into the origin of dreams.

中文翻译：

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梦和白日梦提取假说。

梦想和白日梦既是无形的，又是迷人的。两者都有许多共同点，从神经生物学到感官体验。尽管如此，两者之间的具体叙述关系（如果有的话）仍然不确定。梦起源的理论有很多：从心理动力学的王道，到生物学理论，包括基于赫布的记忆巩固和统一的量子大脑理论，延伸到清醒和做梦。梦的短暂性质以及无法同时研究其内容和生物学，使得它们难以从传统的生物医学角度进行研究。这使得关于梦的基本属性的共识变得模棱两可，甚至在睡眠期间享受的意识状态也存在争议。众所周知，梦和白日梦的感受性和神经生理学特征具有许多共同特征。我们进一步从主观经验主义的立场提出，梦的内容是专门从做白日梦或有意识的游荡（受默认模式网络支持）衍生而来的。如果得到证实，这个概念将为梦的起源提供新的见解。