Octopuses sleepand possibly dreamjust like humans
- Elizabeth Rayne - Jul 6, 2023 8:00 pm UTC Most creatures sleep, but until now, REM (rapid eye movement) sleep, the phase of sleep in which dreams occur, was thought to be exclusive to vertebrates.
- A certain pattern of brain waves known as a “sleep spindle,” which also occurs during human NREM sleep, was detected.
- What exactly a sleep spindle does is not completely known yet, though this wave pattern is thought to be associated with memory.However, about once an hour, everything changed when REM sleep set in.
- They also watched for visible changes in behavior on the outside.During NREM sleep, little activity was detected in the octopuses’ brains, and any behavioral changes were extremely subtle.
- When the team was positive that the animals were asleep, they began observations.They used local field potential (LFP) recording to observe activity in the brains of the sleeping octopuses.
- It was during this phase of sleep that the researchers saw the skin of the cephalopods change colors.Octopus color change happens at the cellular level.
9 with Most creatures sleep, but until now, REM (rapid eye movement) sleep, the phase of sleep in which dreams occur, was thought to be exclusive to vertebrates. Octopuses appear to be the first in [+4869 chars]