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eNeuro. 2016 Apr 29;3(2). pii: ENEURO.0060-16.2016. doi: 10.1523/ENEURO.0060-16.2016. eCollection 2016 Mar-Apr.

Topographical Organization of Attentional, Social, and Memory Processes in the Human Temporoparietal Cortex.

Author information

1
Princeton Neuroscience Institute and Department of Psychology, Princeton University , Princeton, New Jersey 08544.

Abstract

The temporoparietal junction (TPJ) is activated in association with a large range of functions, including social cognition, episodic memory retrieval, and attentional reorienting. An ongoing debate is whether the TPJ performs an overarching, domain-general computation, or whether functions reside in domain-specific subdivisions. We scanned subjects with fMRI during five tasks known to activate the TPJ, probing social, attentional, and memory functions, and used data-driven parcellation (independent component analysis) to isolate task-related functional processes in the bilateral TPJ. We found that one dorsal component in the right TPJ, which was connected with the frontoparietal control network, was activated in all of the tasks. Other TPJ subregions were specific for attentional reorienting, oddball target detection, or social attribution of belief. The TPJ components that participated in attentional reorienting and oddball target detection appeared spatially separated, but both were connected with the ventral attention network. The TPJ component that participated in the theory-of-mind task was part of the default-mode network. Further, we found that the BOLD response in the domain-general dorsal component had a longer latency than responses in the domain-specific components, suggesting an involvement in distinct, perhaps postperceptual, computations. These findings suggest that the TPJ performs both domain-general and domain-specific computations that reside within spatially distinct functional components.

KEYWORDS:

angular gyrus; blind source separation; data-driven fMRI analysis; superior temporal gyrus and sulcus; supramarginal gyrus

PMID:
27280153
PMCID:
PMC4894915
DOI:
10.1523/ENEURO.0060-16.2016
[Indexed for MEDLINE]
Free PMC Article

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