A plateau is our way of visualizing how a state of mind can be quickly activated and shape the totality of the sense of reality, the sense of self, in that moment. A plateau filters which types of peaks can arise
Siegel defines the plateau as a topographic metaphor in his three-P model, arguing that it constitutes an activated state of mind that constrains the entire range of emotional, perceptual, and memorial experience accessible to the self in that moment.
, The Developing Mind: How Relationships and the Brain Interact to Shape Who We Are, 2020thesis