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41 - Dreaming is Imagination Roaming Freely, Based On Embodied Simulation, and Subserved by an Unconstrained Default Network

from Part VI - Altered States of the Imagination

Published online by Cambridge University Press:  26 May 2020

By
G. William Domhoff
Edited by
Anna Abraham
Anna Abraham
Affiliation:
University of Georgia
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Summary

Dreaming is a form of imagination, based on embodied simulation. Dreams frequently involve enactments of a dreamer’s personal conceptions and concerns, both positive and negative, in relation to known persons and favorite avocations. More generally, most dreams include social interactions and activities. Dreaming is supported by an unconstrained portion of the default network, including its dorsal medial and temporal lobe functional subsystems, along with a region in the secondary visual cortex and by the caudate nucleus. The fact that this portion of the default network is unconstrained by the frontoparietal and the dorsal attentional control networks gives dreaming its unique character as imagination roaming freely. This neural substrate has cognitive insufficiencies that are consistent with what is known about dreaming and dream content from six decades of systematic research in laboratory and non-laboratory settings, such as a dearth of episodic memories and only rare indications of “symbolic” content. Nevertheless, there are lawful aspects of dreaming, such as the “small-world” nature of its character networks and consistency in dream content over many years.

Keywords

Dreamingimaginationcognitive developmentdefault networkelectrical brain stimulationneuroimagingneurological lesions
Type
Chapter
Information
The Cambridge Handbook of the Imagination , pp. 676 - 691
Publisher: Cambridge University Press
Print publication year: 2020

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