Theta rhythmicity governs human behavior and hippocampal signals during memory-dependent tasks by ter Wal, M, Linde-Domingo, J, Lifanov, J, Roux, F, Kolibius, LD, Gollwitzer, S, Lang, J, Hamer, H, Rollings, D, Sawlani, V, Chelvarajah, R, Staresina, B, Hanslmayr, S, Wimber, M