Hippocampal replay is a phenomenon observed in rats, mice, cats, rabbits, songbirds and monkeys.During sleep or awake rest, replay refers to the re-occurrence of a sequence of cell activations that also occurred during activity, but the replay has a much faster time scale. It may be in the same order, or in reverse. Cases were also found where a sequence of activations occurs before the actual activity, but it is still the same sequence. This is called preplay. The phenomenon has mostly been observed in the hippocampus, a brain region associated with memory and . Specifically, the cells that exhibit this behavior are place cells, characterized by reliably increasing their activity when the animal is in a certain location in space. During navigation, the place cells fire in a sequence according to the path of the animal. In a replay instance, the cells are activated as if in response to the same spatial path, but at a much faster rate than the animal actually moved in. (Wikipedia).
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From playlist MIT RES.9-003 Brains, Minds and Machines Summer Course, Summer 2015
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From playlist Workshop "Workshop on Mathematical Modeling and Statistical Analysis in Neuroscience" - January 31st - February 4th, 2022
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