Intracranial electrophysiology of mentalizing

Дата публикации: 05-10-2026 00:00:00

Functional magnetic resonance imaging (fMRI) has built the prevailing picture of the social brain. However, fMRI’s hemodynamic basis collapses two dimensions of neural activity that electrophysiology preserves: the millisecond timing of activity and its distribution across the frequency spectrum. This dissertation uses human intracranial electrophysiology (iEEG; N=34) to recover those dimensions for mentalizing – reasoning about mental states – and to reconcile the resulting picture with the fMRI literature it appears at points to contradict. Paper I, using high-frequency broadband (HFB) activity as a proxy for population spiking, shows that the default mode network's apparent simultaneity during mentalizing is in fact a posterior-to-anterior sequence, from visual cortex through temporoparietal DMN to medial prefrontal cortex. Self- and other-mentalizing engage near-identical populations distinguished by the timing – not the magnitude – of their activity, recasting the "other-selective"...

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