Cyclic nature of the REM sleep-like state in the cuttlefish Sepia officinalis
Sepia officinalis in the sleep-like state thirty seconds before entering the rapid eye movement sleep-like (REMS-like) state. Individual animals are denoted by a unique name; here “Hippo”.
“Medusa” thirty seconds before entering the REMS-like state.
“MrChips” thirty seconds before entering the REMS-like state.