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• W2891452790 abstract "Abstract There is a paucity of information about how human hippocampal subfields are functionally connected to each other and to neighbouring extra-hippocampal cortices. In particular, little is known about whether patterns of functional connectivity (FC) differ down the anterior-posterior axis of each subfield. Here, using high resolution structural MRI we delineated the hippocampal subfields in healthy young adults. This included the CA fields, separating DG/CA4 from CA3, separating the pre/parasubiculum from the subiculum, and also segmenting the uncus. We then used high resolution resting state functional MRI to interrogate FC. We first analysed the FC of each hippocampal subfield in its entirety, in terms of FC with other subfields and with the neighbouring regions, namely entorhinal, perirhinal, posterior parahippocampal and retrosplenial cortices. Next, we analysed FC for different portions of each hippocampal subfield along its anterior-posterior axis, in terms of FC between different parts of a subfield, FC with other subfield portions, and FC of each subfield portion with the neighbouring cortical regions of interest. We found that intrinsic functional connectivity between the subfields aligned generally with the tri-synaptic circuit but also extended beyond it. Our findings also revealed that patterns of functional connectivity between the subfields and neighbouring cortical areas differed markedly along the anterior-posterior axis of each hippocampal subfield. Overall, these results contribute to ongoing efforts to characterise human hippocampal subfield connectivity, with implications for understanding hippocampal function. Highlights High resolution resting state functional MRI scans were collected We investigated functional connectivity (FC) of human hippocampal subfields We specifically examined FC along the anterior-posterior axis of subfields FC between subfields extended beyond the canonical tri-synaptic circuit Different portions of subfields showed different patterns of FC with neocortex" @default.
• W2891452790 created "2018-09-27" @default.
• W2891452790 creator A5023367721 @default.
• W2891452790 creator A5067488233 @default.
• W2891452790 creator A5077905104 @default.
• W2891452790 date "2018-09-06" @default.
• W2891452790 modified "2023-09-23" @default.
• W2891452790 title "Differences in functional connectivity along the anterior-posterior axis of human hippocampal subfields" @default.
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• W2891452790 doi "https://doi.org/10.1101/410720" @default.
• W2891452790 hasPublicationYear "2018" @default.
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