image: A crayfish, Procambarus clarkii, rests on a spherical treadmill preparing for walking. This image relates to an article that appeared in the April 15, 2011, issue of Science, published by AAAS. The study, by Katsushi Kagaya and Masakazu Takahata at Hokkaido University in Sapporo, Japan, was titled, "Sequential Synaptic Excitation and Inhibition Shapes Readiness Discharge for Voluntary Behavior." view more
Credit: Image © <i>Science</i>/AAAS