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Narrative imagery: Emotional modulation in the default mode network.

Nicola Sambuco, M. Bradley, P. Lang

Neuropsychologia November 1, 2021 DOI: 10.1016/j.neuropsychologia.2021.108087 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Within-subject design Peer reviewed
Topics Default mode network
Key points Imagining pleasant events increases medial prefrontal cortex activity more than unpleasant events, and emotional (pleasant or unpleasant) imagery activates multiple DMN regions more than neutral imagery.

Abstract

The default mode network (DMN) is activated when constructing and imagining narrative events, with functional brain activity in one region, the medial-prefrontal cortex, hypothesized to be modulated during emotional processing by adding value (or pleasure) to the episodic representation. However, since enhanced reactivity during emotional, compared to neutral, content is a more frequent finding in both the brain and body in physiological, neural, and behavioral measures, the current study directly assesses the effects of pleasure and emotion during narrative imagery in the DMN by using a within-subject design to first identify the DMN during resting state and then assess activation during pleasant, neutral, or unpleasant imagery. Replicating previous findings, enhanced functional activity in the medial prefrontal cortex was found when imagining pleasant, compared to unpleasant, events. In addition, emotion-related activation was found when imagining either pleasant or unpleasant, compared to neutral, events, in other nodes of the DMN including the posterior cingulate cortex (PCC), angular gyrus, anterior hippocampus, lateral temporal cortex, temporal pole, dorsomedial prefrontal cortex (dmPFC), and ventrolateral prefrontal cortex (vlPFC). Pervasive emotional modulation in the DMN is consistent with the view that a primary function of event retrieval and construction is to remember, recreate, and imagine motivationally relevant events important for planning adaptive behavior.

Comparable studies

Other experimental studies on default mode network, most cited first.

Study Year Design Participants
Functional connectivity of default mode network components: Correlation, anticorrelation, and causality Healthy subjects 2008 Observational study using resting-state fMRI and seed correlation analysis
Patterns of Brain Activity Supporting Autobiographical Memory, Prospection, and Theory of Mind, and Their Relationship to the Default Mode Network Healthy subjects 2009 Experimental study using fMRI
Dynamic reconfiguration of the default mode network during narrative comprehension Human subjects 2016 Experimental study
Broadband Cortical Desynchronization Underlies the Human Psychedelic State Healthy human participants 2013 Experimental study
The brain on art: intense aesthetic experience activates the default mode network Human observers 2012 Observational study with fMRI and behavioral analysis

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