To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S2. Representative images of circadian rhythms of PER2::LUC (Left), VIP-CreAAV-Per2-dLUC (Middle), and VIP-CreAAV-Cry1-dLUC (Right) in the cultured SCN slice. (Scale bar: 200 µm.) Long-term in vivo recording of circadian rhythms in brains of freely moving mice Long Mei, Yanyan Fan, Xiaohua Lv, David K. Welsh, Cheng Zhan, and Eric Erquan Zhang PNAS. 2018. 115:4276-4281 DOI: 10.1073/pnas.1717735115 Download Original Video Browse All Videos »