- A man takes a nap on his couch alongside his dog.
It has long been thought that the amount of time spent in different stages of sleep was responsible for how well people were able to remember things.
But a new study done by researchers at the University of California and University of Padua shows that we may have been missing something.
The autonomic nervous system (ANS) appears to be a key player in the brain's ability to perform memory consolidation during sleep.
ANS is made of three parts. The sympathetic system is responsible for the body's "fight or flight" reaction, the parasympathetic system controls the body during rest with functions like heart rate and temperature, and the enteric system controls how your gut works.