Researchers have discovered that positive emotions enhance perceptual memories during sleep, particularly in the non-REM stage.

By modulating brain activity in the amygdala and related regions during non-REM sleep to weaken perceptual memories that triggers flashbacks, doctors could potentially prevent or treat addiction.

Here, using positron emission tomography (PET) and regional cerebral blood flow measurements, we show that waking experience influences regional brain activity ... non-trained subjects, in REM ...