Their most recent paper, published in Nature Neuroscience, reports the observation of the infraslow brain rhythm in seven different lizard species. Recording brain rhythms in different animalsTo study the brain rhythms of animals during sleep, the researchers implanted electrodes on or inside the brain of various specimens. As part of an earlier study, Libourel and his colleagues used the device they created to record brain rhythms in penguins. Specifically, the team found that reptiles, mammals, and birds share a common brain rhythm, the so-called infraslow rhythm. "This rhythm involves not only brain activity but also physiological processes and peripheral vascularization, indicating that it is a global, organism-wide rhythm," said Libourel.