Differential temporo-parietal cortical networks that support relational and item-based recency judgments

Hiroko M. Kimura, Satoshi Hirose, Akira Kunimatsu, Junichi Chikazoe, Koji Jimura, Takamitsu Watanabe, Osamu Abe, Kuni Ohtomo, Yasushi Miyashita, Seiki Konishi

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15 Citations (Scopus)

Abstract

There is a growing interest in the parietal cortical role for episodic memory retrieval. Previous functional magnetic resonance imaging (fMRI) studies of recency judgments, judgments of the relative temporal order of two studied items, have highlighted the involvement of the lateral prefrontal and medial temporal regions. However, the parietal cortical contribution to recency judgments has rarely been highlighted. To examine the parietal involvement, in this study, we conducted a re-analysis to increase the statistical power using three data sets (N = 73) from our previous fMRI studies of recency judgments. Recency judgments can be achieved by at least two mechanisms, relational and item-based ones. It has been revealed that the left hippocampus/parahippocampal region is related to relational recency judgments, and that the right anterior temporal region is related to item-based recency judgments. We examined whether the parietal cortex is involved in these two types of recency judgments. Significant brain activity related to relational recency judgments was observed in the left ventral parietal region and, as reported previously, the left parahippocampal region. On the other hand, significant brain activity related to item-based recency judgments was observed in the left dorsal parietal region and, as reported previously, the right anterior temporal region. Furthermore, correlation analyses of resting-state BOLD signals detected significant correlations between the ventral parietal region and the parahippocampal region, as well as between the dorsal parietal region and anterior temporal region. These results suggest that the two temporo-parietal networks differentially contribute to relational and item-based recency judgments.

Original languageEnglish
Pages (from-to)3474-3480
Number of pages7
JournalNeuroImage
Volume49
Issue number4
DOIs
Publication statusPublished - 2010 Feb 15
Externally publishedYes

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Keywords

  • Functional connectivity
  • Human
  • Parietal cortex
  • Recency judgments
  • fMRI

ASJC Scopus subject areas

  • Neurology
  • Cognitive Neuroscience

Cite this

Kimura, H. M., Hirose, S., Kunimatsu, A., Chikazoe, J., Jimura, K., Watanabe, T., Abe, O., Ohtomo, K., Miyashita, Y., & Konishi, S. (2010). Differential temporo-parietal cortical networks that support relational and item-based recency judgments. NeuroImage, 49(4), 3474-3480. https://doi.org/10.1016/j.neuroimage.2009.11.003