JN Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
 QUICK SEARCH:   [advanced]


     


J Neurophysiol (April 2, 2008). doi:10.1152/jn.00077.2008 Free Article
This Article
Free upon publication Free Article
Right arrow Full Text (PDF)
Right arrow Supplemental Figure
Right arrow All Versions of this Article:
100/1/129    most recent
00077.2008v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Google Scholar
Right arrow Articles by Kahn, I.
Right arrow Articles by Buckner, R. L
PubMed
Right arrow PubMed Citation
Right arrow Articles by Kahn, I.
Right arrow Articles by Buckner, R. L
Submitted on January 22, 2008
Accepted on March 27, 2008

Distinct Cortical Anatomy Linked to Subregions of the Medial Temporal Lobe Revealed by Intrinsic Functional Connectivity

Itamar Kahn1*, Jessica R Andrews-Hanna2, Justin L Vincent2, Abraham Z Snyder3, and Randy L Buckner1

1 Department of Psychology and Center for Brain Science, Harvard University, 02138, Massachusetts, United States; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States; Howard Hughes Medical Institute, Chevy Chase, Maryland, United States
2 Department of Psychology and Center for Brain Science, Harvard University, 02138, Massachusetts, United States; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, Massachusetts, United States
3 Mallinckrodt Institute of Radiology and Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, United States

* To whom correspondence should be addressed. E-mail: kahn{at}nmr.mgh.harvard.edu.

The hippocampus and adjacent cortical structures in the medial temporal lobe (MTL) contribute to memory through interactions with distributed brain areas. Studies of monkey and rodent anatomy suggest that parallel pathways converge on distinct subregions of the MTL. To explore the cortical areas linked to subregions of the MTL in humans, we examined cortico-cortical and hippocampal-cortical correlations using high-resolution, functional connectivity analysis in one hundred individuals. MTL seed regions extended along the anterior to posterior axis and included hippocampus and adjacent structures. Results revealed two separate brain pathways that correlated with distinct subregions within the MTL. The body of the hippocampus and posterior parahippocampal cortex correlated with lateral parietal cortex, regions along the posterior midline including posterior cingulate and retrosplenial cortex, and ventral medial prefrontal cortex. By contrast, anterior hippocampus and the perirhinal/entorhinal cortices correlated with distinct regions in the lateral temporal cortex extending into the temporal pole. The present results are largely consistent with known connectivity in the monkey and provide a novel task-independent dissociation of the parallel pathways supporting the MTL memory system in humans. The cortical pathways include regions that have undergone considerable areal expansion in humans providing insight into how the MTL memory system has evolved to support a diverse array of cognitive domains.







HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
Visit Other APS Journals Online
Copyright © 2008 by the The American Physiological Society.