![]() ![]() Wilson's co-author on the study is brain and cognitive sciences graduate student Albert K. "This time, we were looking at slow wave sleep and asking whether memory patterns related to rats running back and forth on tracks were also reactivated during this other sleep period," Wilson said. Wilson showed in 2001 that rats' memories of a sequential experience such as following a maze were reactivated during REM sleep. ![]() "This may relate to work in humans that suggests that amount of slow wave sleep early in the night, as well as the amount of REM sleep later in the night, is correlated with subsequent enhancement of performance on learned tasks." "We found that brief segments of awake sequential experience were replayed in the hippocampus at high speed during slow-wave sleep, following awake behavior revealing the early processing of sequential event memory during this sleep period," Wilson said. That study focused on REM sleep, while the current study analyzes dreams occurring during slow wave sleep. Wilson, associate professor of brain and cognitive sciences in MIT's Picower Center for Learning and Memory, showed that animals have complex dreams and are able to retain and recall long sequences of events while they are asleep. Slow wave sleep, also referred to as non-REM sleep, makes up a large fraction of the normal sleep cycle and occurs earlier than REM sleep. ![]() 19 issue of Neuron that rats dream about their activities during slow wave sleep as well as during REM sleep. In work that may shed light on how humans form memories, MIT researchers report in the Dec. ![]()
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