About the Authors
Salk Institute for Biological Studies, La Jolla, California, United States of America
Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California, United States of America
University of California, Berkeley, California, United States of America
The authors have declared that no competing interests exist.
JLG, GDF, AS, MG, JS, and EJC designed and carried out the neurophysiological experiments. JLG performed the data analysis and wrote the paper with EJC. AS and AML designed, implemented, and maintained the custom recording system. JLG, GDF, AS, MG, JS, AML, and EJC discussed the results and commented on the manuscript.