AUTHOR=Rockland Kathleen S. TITLE=A Closer Look at Corticothalamic “Loops” JOURNAL=Frontiers in Neural Circuits VOLUME=15 YEAR=2021 URL=https://www.frontiersin.org/journals/neural-circuits/articles/10.3389/fncir.2021.632668 DOI=10.3389/fncir.2021.632668 ISSN=1662-5110