Rats practice running through mazes, cats envision future hunts in their heads—scientists are learning more than ever before about animal dreamers
in the 1960s when he observed cats’ behavior while they slept and then altered it dramatically.
Jouvet called this period paradoxical sleep, when the body is still but the mind remains fully active. This“The cats performed behaviors that are very easy to interpret as mapping onto a waking experience,” says Peña-Guzmán.After rats run a maze during the day, they can rerun the same course while asleep, research has shown. When awake, a rat’s hippocampus, a part of the brain responsible for making and storing memories, remembers the neuron pattern of navigating the maze.
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