• Amft et al. 2015
    Definition and characterization of an extended social-affective default network
    Brain Structure and Function220(2): 1031-1049.
    M. Amft, D. Bzdok, A.R. Laird, P.T. Fox, L. Schilbach, S.B. Eickhoff

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    ABSTRACT: Recent evidence suggests considerable overlap between the default mode network (DMN) and regions involved in social, affective and introspective processes. We considered these overlapping regions as the social-affective part of the DMN. In this study, we established a robust mapping of the underlying brain network formed by these regions and those strongly connected to them (the extended social-affective default network). We first seeded meta-analytic connectivity modeling and resting-state analyses in the meta-analytically defined DMN regions that showed statistical overlap with regions associated with social and affective processing. Consensus connectivity of each seed was subsequently delineated by a conjunction across both connectivity analyses. We then functionally characterized the ensuing regions and performed several cluster analyses. Among the identified regions, the amygdala/hippocampus formed a cluster associated with emotional processes and memory functions. The ventral striatum, anterior cingulum, subgenual cingulum and ventromedial prefrontal cortex formed a heterogeneous subgroup associated with motivation, reward and cognitive modulation of affect. Posterior cingulum/precuneus and dorsomedial prefrontal cortex were associated with mentalizing, self-reference and autobiographic information. The cluster formed by the temporo-parietal junction and anterior middle temporal sulcus/gyrus was associated with language and social cognition. Taken together, the current work highlights a robustly interconnected network that may be central to introspective, socio-affective, that is, self- and other-related mental processes.
    Keywords: Default mode network -- Meta-analytic connectivity modeling -- Resting-state functional connectivity -- Social cognition -- Emotion
    Submitted by: andrew
    Current version: 1
    Last modified: 2015-08-01 08:43:23
    Redistributable: true
    ANIMA ID: 129918

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