[Apologies if you received this message more than once] Dear Colleagues, We are calling for abstracts for contributions towards a publication on *The Functional Role of Critical Dynamics* *in Neural Systems*. The collection will be published by Springer and will be free of charge for the authors. The main aim of this collection will be to bring together research and ideas linking together criticality in the cortex, dynamical and emergent network states and the putative role such states may serve in the way of function and computational advantages. The intended format of the book is a collection of short and concise chapters focusing around this central theme, in order to allow for many different perspectives to be represented. If you would like take part in this publication, please send an extended abstract summarizing your planned contribution, following the guidelines below, to A. Janssen (*ajanssen**@neuro.uni-bremen.de* <ajanssen@neuro.uni-bremen.de>) who will be coordinating the communications by *October* *25th*. For details of the planned contents and structure of the full contributions, as well as our expected timeline, please see below. Full papers will be expected by the end of this year. Best wishes, Udo Ernst & Nergis Tomen & Michael Herrmann *Guidelines for your contribution * We are aiming for a publication that will give a broad overview of the state of research linking neuronal avalanches and self-organized criticality (SOC) to neural function and information processing (for the related concepts please see e.g. [Bak, Tang and Wiesenfeld, 1987] and [Beggs and Plenz, 2003]). Due to the computational advantages of simple systems operating close to a phase transition (e.g. [Langton, 1990]), there has been a growing interest in the neuroscience community in the recent years to tackle the question “Can critical dynamics be useful for the brain?”. And this was the central theme of the *Excellence Workshop "Dynamical network states, criticality and cortical function"* that took place on 25-28 March 2017 in Hanse-Wissenschaftskolleg, Delmenhorst, Germany ( *http://www.h-w-k.de/index.php?id=2240* <http://www.h-w-k.de/index.php?id=2240>). In light of the positive feedback and interest we received from the community, we are now aiming to bring together different ideas and approaches related to critical dynamics and its potential functional role in cortical information processing, and we are looking forward to your contributions. We will have a two-stage submission process for the authors. The first stage is to submit an extended abstract that can be of any format, but should include a title and contact information of the authors and should begin with a very brief summary of the main message of the contribution. As a guideline it is suggested that the length of the extended abstract is 1 to 4 pages and that it contains 1 to 4 figures. Please submit your abstract to *ajanssen**@neuro.uni-bremen.de* <ajanssen@neuro.uni-bremen.de> by *October 25th*. Full papers will be requested before the end of this year. The final papers are expected to include an easy-to-follow introduction, one or more well-evidenced claims and a substantial discussion section. The full papers are limited in size to 15-20 pages each (each page about 450 words), including figures and references. There will be LaTeX and MS Word templates provided by Springer for the full contributions. Each contribution will be peer-reviewed by at least 2 colleagues before being published. Each author of a contribution is also expected to act as a reviewer for 2-3 other contributions. We plan to include reviewers from outside the field to provide 'critical' input. Realistically, we estimate that the review process will start in in winter 2017 and end in spring 2018. We expect the submissions to present original research by the authors.This can include new results or review of past research by the authors (for review papers, it is allowed to include research by other persons where suitable, as long as it does not constitute a major part of the contribution). We believe it is important for contributions to put forward a vision or perspective on criticality research. It is important to make connections to the functionality of the concepts described in your contribution (e.g. how do the properties observed in your model/experiments relate to information transfer/processing, behavioural performance, computation, communication and configuration, etc.). Where applicable, it is allowed and encouraged to talk about predictions and theories about how the contents of a contribution may relate to active computation in the cortex, what practical advantages and biological mechanisms they may be linked to as well as what direction future research should take to answer such questions. We encourage the authors to actively try to draw connections between their own research, research of other scientists in their field as well as outside of their field (e.g. discussing ties with experimental results in a theoretical contribution and vice versa). Thank you for considering these guidelines.