Based on the centrality of semantics to thought, we argue these transitions serve as general, implicit neurobiological markers of new thoughts, and that their frequency, which is stable across contexts, approximates participants’ mentation rate. Transitions detected by our methods predict narrative events, are similar across task and rest, and are correlated with activation of regions associated with spontaneous thought. Here, we introduce methods to sample transitions without any priors.
However, group or training-derived priors have been needed to detect them. Researchers have observed large-scale neural meta-state transitions that align to narrative events during movie-viewing.
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