About the Authors
SISSA, Cognitive Neuroscience Sector, Trieste, Italy
Kavli Institute for Systems Neuroscience and Centre for the Biology of Memory, NTNU, Trondheim, Norway
The authors have declared that no competing interests exist.
Analyzed the data: EC. Wrote the paper: EC AT. Carried out the mathematical analysis of the model and the computer simulations: EC. Designed the model, participated in its analysis and supervised the simulations: AT.