Reactivating memories during sleep

Memory, Science News | 2013/04/14

reactivating memories

photo by Rainer Sturm,

Why do some memories last a lifetime while others disappear quickly? A new study suggests that retaining and reactivating memories has a lot to do with rehearsal.

The study shows that when a memory has a perceived high value, it is more likely to be rehearsed and consolidated also during sleep and remembered later. Many memories that are stored during the day are not remembered.

“We have to rehearse memories in order to keep them. Practice increases the likelihood of later remembering,” says Delphine Oudiette, a postdoctoral fellow in the department of psychology at Northwestern and lead author of the study. “And a lot of our rehearsal happens when we don’t even realize it – while we’re asleep.”

From: ScienceDaily