title: Complex times for earthquakes, stocks, and the brain's activity.
abstract: A new study by He et al. in this issue of Neuron shows that large-scale arrhythmic (1/f) brain activity contains nested temporal structure in the form of crossfrequency coupling. This suggests temporal organization in neural mass activity beyond oscillations and draws attention to ubiquitous but often ignored arrhythmic patterns in neural activity.
authors.affiliation: Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tübingen, Germany. kayser@tuebingen.mpg.de
authors.forename: Christoph
authors.initials: C
authors.lastname: Kayser
authors.forename: Bard
authors.initials: B
authors.lastname: Ermentrout