By monitoring pupil movements in mice, researchers found contracted pupils are associated with recent memory replay, whereas dilated pupils signal older memory processes. These findings may provide ...

Then, when the pupils were dilated, it signaled another substage of non-REM sleep, which was linked to the same process but for older, established memories and learnings. Essentially, the two ...

New Delhi, Pupil size during sleep whether contracted or dilated could be key to understanding how the brain forms long-lasting memories, according to a study in mice, findings from which could ...

It can be tough to spot the signs of stress in your cat because they often like to keep their emotions to themselves. Let’s ...

A contracted pupil during sleep may be an indication the brain is replaying new memories while a dilated one may hint at older memories being relived, a new study suggests. The study, published in the ...

A new study ties the size of the pupil to the process of memory consolidation in sleep. (Credit: Sruilk/Shutterstock) Your pupils say a lot about you — about your mental state, your attention span, ...