The brain functions in the background during non-REM ... To better understand this, researchers tracked mice's brain activity and pupil size while they slept. The mice were taught activities ...

The two measures were synchronized to give a complete picture of how pupil changes during sleep reflected different brain functions for recent and long-term memory consolidation. The researchers a ...

Cornell University researchers have found that the pupil is key to understanding how, and when, the brain forms strong, long-lasting memories. By studying mice equipped with brain electrodes and ...