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. 2022 Mar 8;16:816331. doi: 10.3389/fnins.2022.816331

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Copyright © 2022 Xu, LaGrow, Anumba, Lee, Zhang, Yousefi, Bassil, Clavijo, Khalilzad Sharghi, Maltbie, Meyer-Baese, Nezafati, Pan and Keilholz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The number of papers of fMRI Functional Connectivity Papers Published over the last 20 years. Utilizing the Web of Science (Clarivate, 2017) to search the last 20 years of published articles, an increasing and consistent trend of rs-fMRI studies for both human and rodent fMRI data is prominent. Each frequency search of published articles over a given year is scoped over publication titles, abstracts, and keywords. The keywords included in every search were: fMRI and functional connectivity. Each search was then delineated by year and the combinatorics of mouse, rat, and human (excluding “non-human” to avoid primate-specific studies). The y-axis is in a logarithmic scale to best characterize the increase of rodent papers over time.