Early continuity in neuronal correlates of mentalizing: ALE meta-analyses in adults, children and youths
The ability to understand mental states of others is known as Theory of Mind or mentalizing. Neuroimaging studies in adults have reported activation increases in medial prefrontal, inferior frontal, temporoparietal cortices and precuneus during mentalizing. In children/youths, activation in some areas of this social brain network are suggested to develop early, while other areas mature later. We compared neuroimaging evidence in children/youths and adults during mentalizing using coordinate-based activation likelihood estimation meta-analyses to inform about brain regions consistently or differentially engaged across age. Healthy adults (N=5286) recruited medial prefrontal and middle/inferior frontal cortices, precuneus, temporoparietal junction and middle temporal gyri during mentalizing, which were functionally connected to bilateral inferior/superior parietal lobule and thalamus/striatum. Children and youths (N=479) recruited similar, but fewer regions, including temporoparietal junction, precuneus, medial prefrontal and middle temporal cortices. Subgroup analyses revealed an early continuous engagement of middle medial prefrontal cortex, precuneus and right temporoparietal junction in children (8–11y) and youths (12–18y). Youths additionally recruited the left temporoparietal junction and middle/inferior temporal cortex. Overall, the observed continuous engagement of the medial prefrontal cortex, precuneus and right temporoparietal junction during mentalizing across all ages reflects an early specialization of some of the key social brain regions.