Bird-like propagating brain activity in anesthetized Nile crocodiles

[摘要] Study ObjectivesThe changes in electroencephalogram (EEG) activity that characterize sleep and its sub-states—slow-wave sleep (SWS) and rapid eye movement (REM) sleep—are similar in mammals and birds. SWS is characterized by EEG slow waves resulting from the synchronous alternation of neuronal membrane potentials between hyperpolarized down-states with neuronal quiescence and depolarized up-states associated with action potentials. By contrast, studies of non-avian reptiles report the presence of high-voltage sharp waves (HShW) during sleep. How HShW relate to EEG phenomena occurring during mammalian and avian sleep is unclear. We investigated the spatiotemporal patterns of electrophysiological phenomena in Nile crocodiles (Crocodylus niloticus) anesthetized with isoflurane to determine whether they share similar spatiotemporal patterns to mammalian and avian slow waves.

[学科分类] 生理学

[关键词] Crocodylus niloticus;dorsal ventricular ridge;evolution;high-voltage sharp waves;slow waves;traveling;propagating;isoflurane