Topic: phase-resetting

Sleep is ubiquitous in the animal kingdom, yet our understanding of its possible functions, its control and evolution, remains rudimentary. Two main sleep states have traditionally been distinguished in mammals ­– rapid-eye-movement (REM, also paradoxical or “dream sleep”) and slow-wave (SW, also non-REM) sleep – but biphasic sleep is widespread, also exists in birds and non-avian reptiles, suggesting a possibly common origin. Studying sleep in the Australian dragon Pogona vitticeps, we have previously described a reptilian homologue of the mammalian claustrum and its role in generating activi